Elements (part 1&2)

1. Enthalpy of an ideal gas is a 12. Average pressure on a surface B. 10
function of ________. when changing pressure C. 263.56
A. Entropy D. -9.44
B. Internal energy condition exists. 23. The latent heat of vaporization
C. Temperature A. Back pressure on Joules per kg is equal to
D. Pressure B. Partial pressure _________.
C. Pressure drop
2. Which of the following is the A. 5.4 10
most efficient thermodynamic D. Mean effective B. 4.13 10
cycle? pressure
A. Brayton C. 22.6
B. Otto 13. Which of the following cycles
C. Carnot consists two isothermal and two D. 3.35 10
D. Diesel 24. Form of energy associated with
constant volume processes?
3. What is the first law of A. Diesel cycle the kinetic energy of the random
thermodynamics? B. Ericson cycle motion of large number of
A. Internal energy is due to C. Stirling cycle molecules.
molecular motions
B. Entropy of the universe is D. Otto cycle A. Internal energy
increased by irreversible 14. A control volume refers to B. Kinetic energy
processes C. Heat of fusion
C. Energy can neither be what? D. Heat
created nor destroyed A. A fixed region on space 25. If the temperature is held
D. Heat energy cannot be constant and the pressure
completely transformed B. A reversible process increased beyond the saturation
into work C. An isolated system pressure, then, the working
D. A specified mass medium must be:
4. An ideal gas is compressed 15. In the polytropic process, PVn = A. Saturated vapor
isothermally. What is the constant, if the value of n is B. Compressed liquid
enthalpy change? infinitely large, the process is C. Saturated liquid
A. Always negative A. Isobaric D. Subcooled liquid
B. Always positive B. Isometric 26. Is the condition of pressure and
C. zero temperature at which liquid and
D. undefined C. Isothermal its vapor are indistinguishable?
D. Polyropic A. Critical pint
5. Name the process that has no 16. If the temperature is held B. Dew point
heat transfer. constant and the pressure is C. Absolute humidity
A. Isothermal D. Relative humidity
B. Isobaric increased beyond the saturation 27. When a substance in gaseous
C. Polytropic pressure, then the working state is below the critical
D. Adiabatic medium must be: temperature, it is called
________.
6. An ideal gas is compressed in a A. Compressed liquid A. Vapor
cylinder so well insulated that B. Cloud
there is essentially no heat B. Subcooled liquid C. Moisture
transfer. The temperature of the C. Saturated vapor D. Steam
gas: D. Saturated liquid 28. Superheated vapor behaves
A. Decreases 17. Is one whose temperature is A. Just as gas
B. Increases below the saturation B. Just as steam
C. Remain constant temperature corresponding to C. Just an ordinary vapor
D. Is zero its pressure? D. Approximately as a gas
A. Superheated vapor 29. Which of the following provides
7. What is the SI unit of pressure? the basis for measuring
B. Wet vapor thermodynamic property of
A. C. Subcooled liquid temperature?
D. Saturated liquid A. Zeroth law of
B. 18. Number of molecules in a mole
of any substance is constant thermodynamics
C. Pascal called _____________. B. First law of
D. Psi A. Rankine constant
8. The equation = + B. Avogadro’s number thermodynamics
C. Second law of
applies to which of the C. Otto constant
following? D. Thompson content thermodynamics
19. If the pressure of a gas is D. Third law of
A. Enthalpy constant the volume directly
B. Ideal gas thermodynamics
C. Two phase states proportional to the absolute 30. Which of the following is
D. All pure substance temperature.
9. In the flow process, neglecting commonly used as liquid
kinetic and potential energies, A. Boyle’s law absorbent?
the integral of Vdp represents B. Joule’s law
what? A. Silica gel
A. Heat transfer C. Charles’ law B. Activated alumina
B. Flow energy D. Kelvins’s law C. Ethylene glycol
C. Enthalpy change 20. The number of protons in the D. None of these
D. Shaft work nucleus of an atom or number 31. Mechanism designed to lower
10. Mechanical energy of pressure the temperature of air passing
transformed into energy of heat. of electrons in the orbit of an through it.
A. Kinetic energy atom. A. Air cooler
B. Enthalpy B. Air defense
C. Heat exchanger A. Atomic volume C. Air spill over
D. Heat of compression B. Atomic number D. Air cycle
11. The theory of changing heat 32. A device for measuring the
into mechanical work. C. Atomic weight velocity of wind
A. Thermodynamics D. Atomic mass A. Aneroid barometer
B. Kinematics 21. In a P-T diagram of a pure B. Anemometer
C. Inertia substance, the curve separating C. Anemoscope
D. Kinetics D. Anemograph
the solid phase from the liquid
phase is: 1

A. Vaporization curve
B. Fusion curve

C. Boiling point
D. Sublimation point
22. A water temperature of 18 ⁰F in
the water cooled condenser is

equivalent in ⁰C to ________.
A. 7.78

33. Heat normally flowing from a B. Newton 54. A pressure of 1 millibar is
high temperature bodies a low C. Kilogram equivalent to:
D. Dyne
temperature body wherein it is 43. The volume of fluid passing a A.
impossible to convert heat cross-section of steam on unit
without other effects. time. B. 1000

A. First law of A. Steady flow C. 1000
B. Uniform flow
thermodynamics C. Discharge D. 1000
B. Second law of D. Continuous flow
44. What equation applies in the 55. Work done per unit charge
thermodynamics first law of thermodynamics for when charged is moved from
C. Third law of an ideal gas in a reversible one point to another.
open steady-state system? A. Equipotential surface
thermodynamics
A. − = − B. Potential at a point
D. Zeroth law of C. Electrostatic point
thermodynamics B. − = − D. Potential difference
C. − = − 56. How many independent
34. The temperature at which its properties are required to
vapor pressure is equal the D. − = − completely fix the equilibrium
pressure exerted on the liquid. 45. A pressure of 1 millibar is state of a pure gaseous
A. Absolute humidity compound?
B. Calorimetry equivalent to
C. Boiling point A. 1
A. 1000 B. 2
D. Thermal point C. 3
35. A nozzle is used to B. 1000 D. 4
57. Which of the following relations
A. Increase velocity and C. 1000 defines enthalpy?

decrease pressure D. 1000 A. ℎ = + ⁄
B. Decrease velocity as well
46. When a system deviates B. = +
as pressure infinitesimally from equilibrium
C. Increase velocity as well at every instant of its state, it is C. ℎ = + ⁄

as pressure undergoing: D. ℎ = +
A. Isobaric process 58. Which of the following is true for
D. Decrease velocity and B. Quasi-static process
increase pressure C. Isometric process water at a reference
temperature where enthalpy is
36. The sum of the energies of all D. Cyclic process
the molecules in a system 47. What is the force which tends to zero?
where energies appear in A. Internal energy is
several complex form. draw a body towards the center negative
A. Kinetic energy about which it is rotating? B. Entropy is non – zero
B. Potential energy
A. Centrifugal force C. Specific volume is zero
C. Internal energy B. Centrifugal in motion D. Vapor pressure is zero
D. Frictional energy C. Centrifugal advance 59. On what plane is the Mollier
37. The total energy in a D. Centripetal force diagram plotted?
compressible or incompressible 48. What is the process that has no
fluid flowing across any section heat transfer? A. P-V
in a pipeline is a function of: A. Reversible isometric B. P-T
A. Pressure and velocity B. Isothermal C. h-s
D. h-u
B. Pressure, density and C. Polytropic 60. The compressibility factor z, is
velocity D. Adiabatic used for predicting behavior of
49. Which of the engine is used for non-ideal gases. How is
C. Pressure, density, fighter bombers? compressibility factor defined
velocity and viscosity
A. Turbojet relative to an ideal gas?
D. Flow energy, kinetic B. Pulsejet (subscript c refers to critical
C. Rockets value)
energy, height above D. Ramjet
datum and internal 50. Exhaust gases from an engine A. = ⁄
energy posses:
38. The ratio of the density of a A. Solar energy B. = ⁄
substance to the density of B. Kinetic energy
some standard substance. C. = ⁄
A. Relative humidity C. Chemical energy
B. Specific gravity D. Stored energy D. = ( ⁄ )( ⁄ )
51. At critical point the latent 61. How is the quality x of a liquid –
C. Specific density enthalpy of vaporization is
D. Relative gravity vapor mixture defined?
39. Is one whose pressure is higher A. Temperature dependent
than the saturated pressure B. Zero A. The fraction of the total
corresponding to its C. Minimum volume that is saturated
temperaute. D. Maximum vapor
A. Compressed liquid 52. What is the force which tends to
B. Saturated liquid draw a body towards the center B. The fraction of the total
about which it is rotating?
C. Saturated vapor A. Centrifugal force volume that is saturated
D. Superheated vapor liquid
40. The changing of solid directly to B. Centrifugal in motion C. The fraction of the total
vapor without passing through C. Centrifugal advance mass is saturated
the liquid state is called: D. Centripetal force
A. Evaporation 53. When a system deviates vapor
B. Vaporization infinitesimally from equilibrium D. The fraction of the total
C. Sublimation at every instant of its state, it is
undergoing: mass that is saturated
D. Condensation A. Isobaric process liquid
41. Weight per unit volume is 62. What is the expression for heat
B. Quasi-static process of vaporization?
termed as _______. C. Isometric process
D. Cyclic process A. ℎ
A. Specific gravity
B. Density B. ℎ
C. Weight density
D. Specific volume C. −
42. What is the SI unit of force? D. ℎ − ℎ
A. Pound
63. What is the value of the work
done for a closed, reversible,

isometric system?
A. Zero
B. Positive

2

C. Negative 73. What is the temperature B. Any relationship
D. Indeterminate difference of the cycle if the interrelating 3 or more
64. What is the equation for the entropy difference is ∆S, and state functions
work done by a constant the work done is W?
temperature system? A. W - ∆S C. Relationship
A. = ln( − ) B. W/∆S mathematically
C. ∆S/W interrelating
B. = ( − D. ∆S – W thermodynamic
properties of the material
) ln( − ) 74. Which of the following is not
advantage of a superheated, D. A mathematical
C. = ( − ) closed Rankine cycle over open expression defining a
D. = ln( ⁄ ) Rankine cycle? path between states
65. What is true about the A. Lower equipment cost
polytropic exponent for perfect B. Increased efficiency 82. The state of a thermodynamic
gas undergoing an isobaric C. Increased turbine life system is always defined by its:
process? D. Increased boiler life A. Absolute temperature
B. Process
A. > 0 75. Which of the following C. Properties
B. < 0 statements regarding Rankine D. Temperature and
cycle is not true? pressure
C. = ∞ A. Use of a condensable
vapor in the cycle 83. In any non quasi-static
D. = increases the efficiency thermodynamic process, the
66. How does an adiabatic process of the cycle overall entropy of an isolated
B. The temperatures at system will
compare to isentropic process? which energy is A. Increase and then
A. Adiabatic: heat transfer = transferred to and from decrease
0, isenstropic: heat the working liquid are B. Decrease and then
transfer = 0 less separated than a increase
B. Adiabatic: heat transfer = Carnot cycle C. Increase only
0, isenstropic: heat C. Superheating increases D. Decrease only
transfer = 0 the efficiency of a
C. Adiabatic: reversible, Rankine cycle 84. Entropy is the measure of:
isentropic: not reversible D. In practical terms, the A. The internal energy of a
D. Both: heat transfer = 0; susceptibility of the gas
isentropic: reversible engine materials to B. The heat capacity of a
corrosion is not a key substance
67. During an adiabatic, internally limitation on the C. Randomness or
reversible process, what is true operating efficiency disorder
about the change in entropy? D. The change of enthalpy
A. It is always zero 76. Which one of the following is of a system
B. It is always less than standard temperature and
zero pressure (STP)? 85. Which of the following
C. It is always greater than A. 0 K and 1 atm pressure statements about entropy is
zero B. 0 F and zero pressure false?
D. It is temperature- C. 32 F and zero pressure A. Entropy of a mixture is
dependent D. 0 ⁰C and 1 atm greater than that of
pressure components under the
68. For an irreversible process, same condition
what is true about the change in 77. A substance is oxidized when B. An irreversible process
entropy of the system and which of the following occurs? increases entropy of the
surroundings? A. It turns red universe
A. = ⁄ B. It loses electrons C. Net entropy change in
C. It gives off heat any closed cycle is zero
B. = 0 D. It absorbs energy D. Entropy of a crystal at
0 ⁰F is zero
C. > 0 78. Which of the following is not a
unit of pressure? 86. Work or energy can be function
D. < 0 A. of all of the following except:
69. For which type of process doe A. Force and distance
B. B. Power and time
the equation = hold? C. Force and time
A. Irreversible D. Temperature and entropy
B. Reversible
C. Isobaric C. 87. Energy changes are
D. isothermal represented by all except which
D. one of the following:
70. Which of the following is true for A.
any process? 79. Which of the following is the
A. ∆S (surrounding) + ∆S definition of Joule? B. − ∫
(system) > 0 A. Newton meter C. − PdV
B. ∆S (surrounding) + ∆S D.
(system) < 0 B.
C. ∆S (surrounding) + ∆S
(system) ≤ 0 C. Unit of power
D. ∆S (surrounding) + ∆S D. Rate of change of energy 88. + is a quantity called:
(system) ≥ 0 80. Which of the following is the A. Shaft work
basis for Bernoulli’s for fluid B. Entropy
71. Which of the following is true for flow? C. Enthalpy
any process? A. The principle of D. Internal energy
A. Brayton
B. Rankine conversation of mass 89. In flow process, neglecting KE
C. Carnot B. The principle of and PE changes, ∫
D. Otto represents which item below?
conservation of energy A. Heat transfer
72. The ideal reversible Carnot C. The continuity equation B. Shaft work
cycle involves four basic D. Fourier’s law C. Enthalpy change
processes. What type of 81. Equation of state for a single D. Closed system work
processes are they? component can be any of the
A. All isothermal following except: 90. Power may be expressed in
B. All adiabatic A. The ideal gas law units of
C. All isentropic A. −
D. Two isothermal and
two isentropic 3

B. − ℎ D. State properties D. Absolute Celsius
C. 100. The properties that is 112. The absolute zero on the
D. ⁄
91. Equilibrium condition exist in all independent of the mass of the Celsius scale is at:
except which of the following? system such as temperature, A. -459.7 ⁰F
A. In reversible processes pressure, density and voltage. B. 459.7 ⁰F
C. -273.15 ⁰C
B. In processes where A. Intensive properties D. 273.15 ⁰C
driving forces
infinitesimals B. Extensive properties 113. What is the absolute
C. Specific properties temperature in Celsius scale?
C. In a steady state flow D. State properties A. Degrees Rankine
101. The properties for a unit mass B. Degrees Kelvin
process and are intensive by definition C. Absolute Fahrenheit
D. Where nothing can occur such as specific volume. D. Absolute Celsius
A. Intensive properties
without an effect or B. Extensive properties 114. The Fahrenheit scale was
system’s surrounding introduced by Gabriel
92. In a closed system (with a C. Specific properties Fahrenheit of Amstermdam,
moving boundary) which of the D. Thermodynamic Holland in what year?
following represents work done A. 1592
during an isothermal process? properties B. 1742
102. The condition as identified C. 1730
A. = 0 D. 1720
through the properties of the
B. = ( − ) substance, generally defined by 115. The Centigrade scale was
particular values of any two introduced by Anders Celsius in
C. = independent properties. what year?
A. 1542
A. State B. 1740
D. = B. Point C. 1730
C. Process D. 1720
93. A substance that exists, or is D. Flow
regarded as existing as a 103. The only base unit with a prefix 116. The National Bureau of
continuum characterized by a kilo is: Standards uses, among others,
low resistance to flow and the A. Kilogram the liquid-vapor equilibrium of
B. Kilometer hydrogen at:
tendency to assume the shape A. -196 ⁰C
of its container. C. Kilojoule B. 196 ⁰C
D. Kilopascal C. 253 ⁰C
A. Fluid 104. The force of gravity on the D. -253 ⁰C
B. Atom body.
117. The National Bureau of
C. Molecule A. Weight Standards uses, among others,
D. Vapor B. Specific gravity the liquid-vapor equilibrium of
94. A substance that is C. Attraction nitrogen at:
homogeneous in composition D. Mass A. -196 ⁰C
105. The mass per unit volume of B. 196 ⁰C
and homogeneous and any substance. C. 253 ⁰C
invariable in chemical A. Density D. -253 ⁰C
aggregation. B. Specific volume
118. The liquid-vapor equilibrium of
A. Pure substance C. Specific weight oxygen is at what temperature?
D. Specific gravity A. 197.82 ⁰C
B. Simple substance 106. The force of gravity on unit B. -197.82 ⁰C
C. Vapor volume is: C. 182.97 ⁰C
D. Water D. -182.97 ⁰C
95. A substance whose state is A. Density
defined by variable intensive B. Specific volume 119. The solid-liquid equilibrium of
thermodynamic properties. C. Specific weight mercury is at what
A. Pure substance D. Specific gravity temperature?
B. Simple substance 107. The reciprocal of density is: A. 38.87 ⁰C
A. Specific volume B. -38.87 ⁰C
C. Vapor B. Specific weight C. 37.88 ⁰C
D. Water C. Specific gravity D. -37.88 ⁰C
96. A system in which there is no
exchange of matter with the D. Specific heat 120. The solid-liquid equilibrium of tin
108. Avogadro’s number, a is at what temperature?
surrounding or mass does not A. -38.87 ⁰C
fundamental constant of nature, B. 38.87 ⁰C
cross its bounderies. is the number of molecules in a C. 231.9 ⁰C
A. Open system D. -231.9 ⁰C
B. Closed system gram-mole. This constant is:
121. The solid-liquid equilibrium of
C. Isolated system A. 6.05222 10 zinc is at what temperature?
D. Nonflow system A. 2331.9 ⁰C
97. A system that is completely B. . B. 419.505 ⁰C
impervious to surrounding or C. 444.60 ⁰C
C. 6.20522 10 D. 630.5 ⁰C
neither mass nor energy cross
its bounderies. D. 6.50222 10 122. The liquid-vapor equilibrium of
109. The ratio of the gas constant to sulfur is at what temperature?
A. Open system A. 231.9 ⁰C
B. Closed system Avogadro’s number is: B. 419.505 ⁰C
A. Maxwell’s constant C. 444.60 ⁰C
C. Isolated system B. Boltzmann’z constant D. 630.5 ⁰C

D. Nonflow system C. Napier’s constant 123. The solid-liquid equilibrium of
98. A system in which there is a D. Joule’s constant antimony is at what
110. The absolute zero on the temperature?
flow of mass across its Fahrenheit scale is at: A. 630.5 ⁰C
B. 419.505 ⁰C
bounderies. A. -459.7 ⁰F
A. Open system B. 459.7 ⁰F 4
B. Closed system C. -273.15 ⁰C
C. Isolated system D. 273.15 ⁰C
111. Absolute temperatures on the
D. Steady flow system Fahrenheit scale are called:
99. The properties that are A. Degrees Rankine
B. Degrees Kelvin
dependent upon the mass of
the system and are total values C. Absolute Fahrenheit

such as total volume and total
internal energy.

A. Intensive properties
B. Extensive properties

C. Specific properties

C. 444.60 ⁰C A. Cycle A. Enthalpy
D. 231.9 ⁰C B. Process B. Heat
124. The solid-equilibrium of silver is C. Flow C. Internal energy
at what temperature? D. Entropy
A. 630.5 ⁰C D. Control 145. It is stored within the body.
B. 960.8 ⁰C 134. When a certain mass of fluid in A. Enthalpy
B. Heat
C. 1063 ⁰C a particular state passes C. Internal energy
D. 1774 ⁰C D. Entropy
125. The solid-equilibrium of gold is through a series of processes 146. A theoretically ideal gas which
at what temperature? and return its initial state, it strictly follows Boyle’s law and
undergoes a: Charles’ law of gases.
A. 630.5 ⁰C A. Universal gas
B. 960.8 ⁰C A. Revolution B. Perfect gas
C. 1063 ⁰C B. Rotation C. Combined gas
D. 1774 ⁰C D. Imperfect gas
126. The solid-equilibrium of C. Process 147. In a confined gas, if the
platinum is at hat temperature? D. Cycle absolute temperature is held
A. 630.5 ⁰C 135. The term given to the collection constant, the volume is
B. 960.8 ⁰C of matter under consideration inversely proportional to
enclosed with a boundary. absolute pressure.
C. 1063 ⁰C A. System A. Boyle’s law
D. 1774 ⁰C B. Matter B. Charles’ law
127. The solid-equilibrium of C. Environment C. Dalton’s law
tungsten is at what D. Avogadro’s law
D. Atoms 148. In a confined gas if the absolute
temperature? 136. The region outside the pressure is held constant the
A. 3730 ⁰C volume is directly proportional
B. 3370 ⁰C boundary or the space and to the absolute temperature.
C. 3073 ⁰C A. Boyle’s law
matter external to a system: B. Charles’ law
D. 3037 ⁰C A. Ex-system C. Dalton’s law
128. The device that measures B. Surrounding D. Avogadro’s law
C. Matter 149. The pressure exerted in a
temperature by electromotive D. Extension vessel by a mixture of gases is
force. equal to the sum of the
137. The true pressure measured pressures that each separate
A. Thermometer above a perfect vacuum. gas would exert if it alone
B. Thermocouple A. Absolute pressure occupied the whole volume of
C. Electro-thermometer the vessel.
D. Thermoseebeck B. Gage pressure A. Boyle’s law
129. The emf is a function of the C. Atmospheric pressure B. Charles’ law
temperature difference between D. Vacuum pressure C. Dalton’s law
the junction, a phenomenon 138. The pressure measured from D. Avogadro’s law
called: the level of atmospheric 150. At equal volume, at the same
pressure by most pressure temperature and pressure
A. Seebeck effect recording instrument like conditions, the gases contain
B. Stagnation effect pressure gage and open-ended the same number of molecules.
C. Priming A. Boyle’s law
D. Electromotive force manometer. B. Charles’ law
130. The device that measure A. Gage pressure C. Dalton’s law
temperature by the B. Atmospheric pressure D. Avogadro’s law
electromotive force called C. Barometric pressure 151. A process in which the system
thermocouple was discovered departs from equilibrium state
D. Absolute pressure only infinitesimally at every
by: 139. The pressure obtained from instant.
A. Galileo A. Reversible process
B. Fahrenheit barometric reading. B. Irreversible process
C. Celsius A. Absolute pressure C. Cyclic process
D. Quasi-static process
D. Seebeck B. Gage pressure 152. A process which gives the same
131. When two bodies, isolated from C. Atmospheric pressure states/conditions after the
D. Vacuum pressure system undergoes a series of
other environment, are in 140. It is a form of energy associated processes.
thermal equilibrium with a third with the kinetic random motion A. Reversible process
of large number of molecules. B. Irreversible process
body, the two are in thermal A. Internal energy C. Cyclic process
equilibrium with each other. B. Kinetic energy D. Quasi-static process
153. A thermodynamic system that
A. Zeroth law of C. Heat generally serves as a heat
thermodynamics D. Enthalpy source or heat sink for another
141. The heat needed to change the system.
B. First law of temperature of the body without A. Combustion chamber
thermodynamics B. Heat reservoir
changing its phase. C. Heat engine
C. Second law of A. Latent heat D. Stirling engine
thermodynamics B. Sensible heat 154. A thermodynamic system that
C. Specific heat operates continuously with only
D. Third law of energy (heat and work) crossing
thermodynamics D. Heat transfer its boundaries; its boundaries
142. The heat needed by the body to
132. The total entropy of pure 5
substance approaches zero as change its phase without
changing its temperature.
the absolute thermodynamic
temperature approaches zero. A. Latent heat
B. Sensible heat
A. Zeroth law of C. Specific heat
thermodynamics D. Heat transfer
143. The measure of the
B. First law of randomness of the molecules of
thermodynamics a substance.
A. Enthalpy
C. Second law of
thermodynamics B. Internal energy
C. Entropy
D. Third law of D. heat
thermodynamics 144. The heat energy transferred to
a substance at a constant
133. If any one or more properties of pressure process is ________.
a system change, the system is

said to have undergone a
______.

are impervious to the flow of A. Dynamic processes D. 839 m/s
mass. B. Stable processes 173. Which of the following cycles
C. Quasi-static processes
A. Heat engine has two isothermal and two
B. Steady flow work D. Static processes constant volume processes?
C. Stirling engine 164. Isentropic flow is:
D. Ericsson cycle A. Joule cycle
155. A surface that is impervious to A. Perfect gas flow B. Diesel cycle
heat is: C. Ericsson cycle
A. Isothermal surface B. Irreversible adiabatic flow D. Stirling
B. Adiabatic surface C. Ideal fluid flow 174. “It is impossible to construct a
C. isochoric surface D. Reversible adiabatic heat engine that operates in a
D. isobaric process cycle and receives a given
156. One of the consequences of flow quantity of heat from a high
Einstein’s theory of relativity is 165. Exhaust gases from an engine temperature body and does an
that mass may be converted equal amount of work” The
into energy and energy into possess: above statement is known as:
mass, the relation being given A. Solar energy A. Gay Lussacs’s law
by the famous equation, B. Kinetic energy B. Kinetic theory
C. Kelvin – Plank’s law
= . What is the value of C. Chemical energy D. Joule – Thomson’s law
D. Stored energy 175. For steam nozzle, which of the
speed of light ? 166. The extension and compression following ratios will have the
of a helical spring is an example value less than unity?
A. 2.7797 10 / A. (Pressure at
of what process?
B. . / A. Isothermal cycle inlet)/(Pressure at outlet)
B. Thermodynamic process B. (Specific volume at
C. 1.7797 10 / C. Adiabatic process
inlet)/(Specific volume
D. 2.9979 10 / D. Reversible process at outlet)
157. In the polytropic process we 167. At critical point the latent C. (Temperature of steam at
inlet)/(temperature steam
have = , if the enthalpy of vaporization is at outlet)
value of n is infinitely large, the ______. D. None of the above
process is called: 176. A Bell-Coleman cycle is a
A. Dependent on reversed
A. Constant volume temperature A. Stirling cycle
process B. Brayton cycle
B. Zero C. Joule cycle
B. Constant pressure C. Minimum D. Carnot cycle
process 177. Ericsson cycle consists of the
D. Maximum following processes:
C. Constant temperature 168. Which of the following relations A. Two isothermal and two
process constant volume
is not applicable in a free B. Two isothermal and two
D. Adiabatic process expansion process? constant isentropic
158. The thermodynamic cycle used C. Two isothermal and
A. Heat supplied is zero two constant pressure
in a thermal power plant is: B. Heat rejected is zero D. Two adiabatic and two
A. Ericsson C. Work done is zero constant pressure
B. Brayton D. Change in temperature 178. A steam nozzles changes:
C. Joule A. Kinetic energy into heat
D. Rankine is zero energy
169. The triple point of a substance B. Heat energy into
159. For the same heat input and potential energy
same compression ratio: is the temperature and pressure C. Potential energy into
A. Both Otto cycle and at which: heat energy
Diesel cycle are equally D. Heat energy into kinetic
efficient A. The solid and liquid are energy
B. Otto cycle is less efficient in equilibrium 179. Which of the following for
the Diesel cycle calculating air standard
C. Efficiency depends B. The liquid and gaseous efficiency?
mainly on working phases are in equilibrium A. All processes are
substance reversible
D. None of the above is C. The solid, liquid and the B. Specific heat remains
correct gaseous phase are in unchanged at all
equilibrium temperatures
160. A heat exchange process where C. No account of the
in the product of pressure and D. The solid does not mechanism of heat
volume remains constant called: transfer is considered
A. Heat exchange process melt, the liquid does D. Gases dissociate at
B. Isentropic process not boil and the gas higher temperature
C. Throttling process does not condense 180. According to Pettlier Thomson
D. Hyperbolic process 170. According to Clausius effect:
statement A. It is impossible to
161. Which of the following provides A. Heat flows from hot construct a heat engine
the basis for measuring substance to cold that operates in a cycle
thermodynamic property of substance unaided and receives a given
temperature? quantity of heat from a
A. Zeroth law of B. Heat cannot flow from high temperature body
thermodynamics cold substance to hot and does an equal
B. First law of substance amount of work
thermodynamics
C. Second law of C. Heat can flow from cold 6
thermodynamics substance to hot
D. Third law of
thermodynamics substance with the aid if
external work
162. 1 watt is equal to: D. A and C
A. ⁄ 171. A heat engine is supplied at rate
of 30,000 J/s gives an output of
B. 1 ⁄ 9 KW. The thermal efficiency of
the engine is:
C. 1 ⁄ℎ A. 30 %

D. 1 ⁄ℎ B. 43 %
163. Under ideal conditions, C. 50 %
D. 55 %
isothermal, isobaric, isochoric 172. The RMS velocity of hydrogen
and adiabatic processes are: gas at N.T.P. is
approximately______.
A. 3838 m/s
B. 1839 m/s

C. 4839 m/s

B. It is impossible to B. Turbojet C. Standard temperature
construct a device that C. Ramjet D. Equal to air’s dew point
operates in a cycle and D. Pulsejet
189. The thermal efficiency of gas- temperature
produces no effect other vapor cycle as compare to 198. Is a measure of the energy that
than the transfer of heat steam turbine or gas turbine.
from a cooler body to is no longer available to perform
hotter body A. Greater than useful work within the current
B. Less than environment?
C. When two dissimilar C. Not comparable
metals are heated at one D. Equal A. Absolute entropy
end and cooled at other, 190. The process in which heat B. Absolute enthalpy
e.m.f. that is developed energy is transferred to a C. Fugacity
thermal energy storage device D. Molar value
is proportional to is known as: 199. A graph of enthalpy versus
difference of entropy for steam.
temperatures at two ends A. Adiabatic A. Mollier diagram
D. Work can’t be B. Regeneration B. Moody diagram
C. Intercooling C. Steam table
converted into heat D. Heat transfer D. Maxwell diagram
181. In actual gases the molecular 191. The absolute zero in Celsius 200. The reaction of inertia in an
scales is: accelerated body is called:
collisions are: A. 100 A. Kinetic reaction
A. Plastic B. 0 B. Endothermic reaction
C. Kinematic reaction
B. Elastic C. -273 D. Dynamic reaction
C. Inelastic D. 273 201. A Mollier chart of
D. Inelastic 192. What is the temperature when thermodynamic properties is
182. The Beattie-Bridgeman water and vapor are in shown in which of the following
equation of state is accurate in diagrams?
case of: equilibrium with the atmospheric A. T-S diagram
A. All pressures above pressure? B. P-V diagram
C. h-S diagram
atmospheric pressure A. Ice point D. p-h diagram
B. Steam point 202. the following are included in the
B. Densities less than first thermodynamics for closed
about 0.8 times the C. Critical point system except:
critical density D. Freezing point A. heat transferred in and
193. The temperature of a pure
C. Near critical temperature substance at a temperature of out of the system
B. work done by or on the
D. None of the above absolute zero is:
183. Which of the following A. Unity system
B. Zero C. internal energy
statement about Van der Waals C. Infinity D. kinetic energy
equation is correct? 203. All processes below are
D. 100 irreversible except one. Which
A. It is valid for all pressures 194. When the number of reheat one?
and temperatures A. Magnetization with
stages in a reheat cycle is
B. It represents a straight increased, the average hysteresis
line on PV versus V plot B. Elastic tension and
temperature:
C. It has three roots of A. Increases release of a steel bar
identical value at the B. Decreases C. Inelastic deformation
critical point C. Is constant D. Heat conduction
204. The combination of conditions
D. The equation is valid for D. Is zero that best describes
195. A temperature measurement in thermodynamic process is given
diatomic gases only by which of the following?
184. The Clapeyron’s equation is an ordinary thermometer which I. Has successive states
has constant specific humidity.
applicable to: through which the
A. 1 system in equilibrium A. Critical temperature system passes
B. Dew point temperature II. When reversed leaves
B. A change of state C. Dry bulb temperature no change in the system
C. A change of state when D. Wet bulb temperature III. When reversed leaves
196. In a closed vessel, when no change in the system
two phases are in vaporization takes place, the or the surroundings
equilibrium temperature rises. Due to the IV. State are passes through
rising temperature, the pressure so quickly that the
D. A change of state when surroundings do not
water and water vapor increases until equilibrium is change
are involved established between the A. I and II
temperature and pressure. The B. I and III
185. The vapor pressure is related to temperature of equilibrium is C. I and IV
the enthalpy of vaporization by D. I only
the: called: 205. The sum of energies of all the
A. Clausius-Claypeyron’s A. Dew point molecules in a complex in a
equation B. Ice point system where energies appear
C. Superheated in several complex forms is the:
B. Dalton’s law A. Kinetic energy
C. Raoult’s law temperature B. Potential energy
D. Maxwell’s equation D. Boiling point C. Internal energy
186. Solubility of a gas in a liquid at 197. When a hot soup was served in D. Frictional energy
small concentration can be a cup during dinner an engineer 206. The Carnot refrigeration
represented by which law? includes all of the following
A. Henry’s law was so eager to drink it. Since it process except:
B. Clasius-Clapeyron’s was hot, he added cubes of ice
to cool the soup and stirred it. 7
equation He noticed that dew starts to
C. Dalton’s law
D. Roult’s law form on the outermost surface
187. A compound pressure gauge is of the cup. What is this
used to measure: temperature equal to?
A. Complex pressures
B. Variable pressures A. Superheated
C. Average pressures temperature

D. Positive and negative B. Equal to zero
pressures

188. Which of the engine is used for
fighter bombers?

A. Turboprop

A. Isentropic expansion A. Absolute zero 226. During stagnation process, the
B. Isothermal heating temperature kinetic energy of a fluid is
C. Isenthalpic expansion converted to enthalpy which
B. Stagnation temperature results in an:
D. Isentropic compression A. Increase in the fluid
207. The maximum possible work C. Boling temperature specific volume
D. Critical temperature B. Increase in a fluid
that can be obtained a cycle 216. Gauge pressure and absolute pressure
pressure differ from each other C. Increase in the fluid
operating between two by: temperature and
reservoirs is found from: A. The system units pressure
B. Atmospheric pressure D. Increase in the fluid
A. Process irreversibility C. The size of the gauge temperature
B. Availability
C. Carnot efficiency D. Nothing they mean the 227. The properties of fluid at the
same thing stagnation in state are called
D. Reversible work _______.
208. The following factors are 217. Each of the following are correct A. Stagnation property
values of standard atmospheric B. Stagnation phase
necessary to define pressure except: C. Stagnation state
A. 1,000 atm D. Stagnation vapor
thermodynamic cycle except: B. 14.962 psia
A. The working substance C. 760 torr 228. All of the following are
B. High and low thermodynamic property except
temperature reservoirs D. 1013 mm Hg ______.
C. The time it takes to 218. All of the following are A. Temperature
B. Pressure
complete the cycle properties of an ideal gas C. Density
D. The means of doing work D. Modulus of elasticity
except:
on the system A. Density 229. A liquid boils when its vapor
209. All of the following terms B. Pressure pressure equals:
C. Viscosity A. The gage pressure
included in the second law for D. Temperature B. The critical pressure
open system except: C. The ambient
219. Which of the following in sot the temperature
A. Shaft work universal gas constant? D. One standard
B. Flow work atmosphere
A. 1545 − ⁄ − ⁰
C. Internal energy 230. A system composed of ice and
D. Average work B. 8.314 ⁄ . water at 0 ⁰C is said to be:
210. All of the following terms are A. A multiphase material
included in the first C. ⁄ . B. In thermodynamic
thermodynamics for open equilibrium
systems except: D. 8.314 ⁄ . C. In thermal equilibrium
A. Heat transfers in and out 220. The following are all commonly D. All of the above

of the system quoted values of standard 231. The heat of fusion of a pure
substance is:
B. Work done by or in the temperatures and pressure A. The change in phase
system except: from solid to gas
B. The change of phase
C. Magnetic system A. 32 ⁰ and 14.696 psia from liquid to gas
D. Internal system B. 273.15 K and 101.325 C. The energy released in a
211. The following terms are chemical reaction
included in the first law of KPa D. The energy requires to
thermodynamics for closed melt the substance
C. 0 ⁰ and 29.92 in Hg
systems except: 232. The heat vaporization involves
A. Heat transfers in and out D. 0 ⁰ and 29.92 in Hg the change on enthalpy due to:
of the system 221. The variation of pressure in an A. The change in phase
B. Work done by or on the from solid to gas
system asobaric process is: B. The change of phase
A. Linear with temperature from liquid to gas
C. Internal energy C. The energy release in a
D. Kinetic energy B. Described by the perfect chemical reaction
212. Which of the following gas law D. The change in phase
statements about a path from solid to liquid
function is not true? C. inversely proportional to
A. On a p-v diagram, it can temperature 233. The heat of sublimation involves
the change in enthalpy due to
represent work done D. zero ______.
B. On a t-s diagram, it can 222. For fluid flow, the enthalpy is A. The change in phase
from solid to gas
represent heat the sum of internal energy and B. The change of phase
transferred _______. from liquid to gas
C. It is dependent on the C. The energy release in a
path between state of A. Entropy chemical reaction
B. Work flow D. The change in phase
thermodynamic C. Pressure from solid to liquid
equilibrium D. Temperature
D. It represents value of 223. A thermodynamic process 234. A specific property
p,v,t and s between whose deviation from A. Defines a specific
equilibrium is infinitesimally at variable (e.g.,
states that are path all times is ________. temperature)
functions B. Is independent of mass
213. A constant pressure A. Reversible C. Is an extensive property
thermodynamic process obeys: B. Isentropic multiplied by mass
C. In quasi-equilibrium
A. Boyle’s law D. Isenthalpic 8
B. Charles’ law 224. Which thermodynamic property
C. Amagat’s law best describes the molecular
D. Dalton’s law activity of a substance?
214. The first and second law of A. Enthalpy
thermodynamics are:
A. Continuity equations B. Entropy
B. Momentum equations C. Internal energy
D. External energy
C. Energy equations 225. Stagnation enthalpy represents
D. Equation of state the enthalpy of a fluid when it is
215. Represents the temperature an brought to rest ______.
ideal gas will attain when it is A. Isometrically
B. Adiabatically
brought to rest adiabatically.
C. Isothermally
D. Disobarically

D. Is dependent of the for all other properties B. Diffusion
phase of the substance except entropy C. Current flow through an
D. Arithmetic average
235. A material’s specific heat can 243. The relationship between the electrical resistance
be defined as: total volume of a mixture of non- D. An isentropic
A. The ratio of heat required reacting gases and their partial
to change the compression of a
volume is given by: perfect gas
temperature of mass by A. Gravimetric fractions 251. All of the following processes
a change in temperature B. Amagat’s law are irreversible except:
B. Being different for C. Dalton’s law A. Magnetization with
constant pressure and D. Mole fraction hysteresis
constant temperature B. Elastic tension and
244. The relationship between the release of a steel bar
processes total pressure of a non-reacting C. Inelastic deformation
C. A function of temperature ases and the partial pressures D. Heat conduction
D. All of the above 252. Which of the following state(s)
236. If a substance temperature is of constituents is given by: is/are necessary for a system to
less than its saturation A. Gravimetric function be in thermodynamic
temperature, the substance is: B. Volumetric functions equilibrium?
A. Subcooled liquid C. Dalton’s law A. Chemical equilibrium
B. Wet vapor D. Mole fractions B. Thermal equilibrium
C. Mechanical equilibrium
C. Saturated vapor 245. Which of the following is the D. Chemical, mechanical,
D. Superheated vapor best definition of enthalpy? and thermal
237. If a substance temperature is A. The ratio of heat added equilibrium
equal to its saturation 253. Adiabatic heat transfer with a
temperature, the substance is a to the temperature vapor cycle refers to:
__________. increases in a system A. Heat transfer that is
A. Subcooled liquid B. The amount of useful atmospheric but not
B. Wet vapor energy in a system reversible
C. The amount of energy no B. The transfer of energy
C. Saturated liquid and from one stream to
vapor longer available to the another in a heat
system exchanger so that the
D. Superheated vapor D. The heat requires to energy of the input
238. If a substance’s temperature is cause a complete streams equals the
energy of the output
greater than its saturation conversion between two streams
temperature, the substance is phases at a constant C. Heat transfer that is
a_______. temperature reversible but not
246. Which of the following isentropic
A. Subcooled liquid statements is not true for real D. There is no such thing as
gases? adiabatic heat transfer
B. Wet vapor A. Molecules occupy a 254. Which of the following gives
C. Saturated vapor volume not negligible in polytropic under n?
D. Superheated vapor A.
239. Critical properties refers to comparison to the total
A. Extremely important volume of gas
B. Real gases are subjected
properties, such as to attractive forces B.
temperature and
between molecules (e.g., C.
pressure Van der Waal’s forces)
B. Heat required for phase C. The law of corresponding D.
states may be used for
change and important for 255. The work done in an adiabatic
energy production real gases process in a system:
C. Property values where D. Real gases are found A. Is equal to the change in
total energy in a closed
liquid and gas phase only rarely in nature system
are indistinguishable 247. The stagnation state is called B. Is equal to the total net
D. Properties having to do heat transfer plus the
with equilibrium the isentropic stagnation state entropy change
when the stagnation process is: C. Is equal to the change in
conditions, such as the total energy of closed
Gibbs and Helmholtz A. Reversible as well system plus the entropy
functions. dynamic change
240. For a saturated vapor, the D. Is equal to the change
relationship between B. Isotropic in total energy of
temperature and pressure is C. Adiabatic closed system plus net
given by: D. Reversible as well as heat transfer
A. The perfect gas law
adiabatic 256. Based on the first law of
B. Van der Waal’s equation 248. The entropy of a fluid remains thermodynamics, which of the
C. The steam table following is wrong?
D. A Viral equation of state constant during what process? A. The heat transfer equals
241. Properties of a superheated A. Polytropic stagnation the work plus energy
vapor are given by process change
A. The perfect gas law B. The heat transfer
B. A superheated table B. Unsteady stagnation cannot exceed the
C. A one to one process work done

relationship, such as the C. Combustion process 9
properties of saturated D. Isentropic stagnation
steam
D. A Viral equation of state process
242. Properties of non-reacting gas 249. All of the following processes
mixtures are given by:
A. Geometric weighting are irreversible except:
B. Volumetric weighting A. Stirring of a viscous fluid

C. Volumetric weighting B. An isentropic
for molecular weight deceleration of a
and density, and moving perfect fluid
geometric weighting
C. An unrestrained

expansion of a gas
D. Phase changes
250. All of the following processes
are irreversible except:

A. Chemical reactions

C. The net transfer equal D. Two isothermal and two C. Atomic pile
the net work of the cycle constant volume D. Atomic energy
processes 276. What do you call the weight of
D. The net heat transfer the column of air above the
267. Brayton cycle has earth’s surface?
equals the energy A. Two isentropic and two A. Air pressure
change if no work done constant volume B. Aerostatic pressure
257. Assuming real processes, the processes C. Wind pressure
net entropy change in the B. Two isentropic and two D. Atmospheric pressure
universe: constant pressure 277. What keeps the moisture from
A. Must be calculated processes passing through the system?
B. Equals zero C. One constant pressure, A. Dehydrator
C. Is negative one constant volume and B. Aerator
two adiabatic processes C. Trap
D. Is positive D. Two isothermal, one D. Humidifier
258. Which of the following types of constant volume and one 278. What condition exists in an
constant pressure adiabatic throttling process?
flowmeters is most accurate? processes A. Enthalpy is variable
B. Enthalpy is constant
A. Venturi tube 268. A Bell-Coleman cycle is a C. Entropy is constant
B. Pitot tube reversed D. Specific volume is
C. Flow nozzle A. Stirling cycle
D. Foam type B. Joule cycle constant
259. What is referred by control C. Carnot cycle 279. The specific gravity of a
volume? D. Otto cycle
A. An isolated system substance is the ratio of the
B. Closed system 269. A steam nozzle changes density to the density of:
A. Kinetic energy into heat
C. Fixed region in space energy A. Mercury
D. Reversible process only B. Heat energy into B. Gas
260. What is the most efficient potential energy C. Air
thermodynamic cycle? C. Heat energy into kinetic D. Water
energy 280. A compound pressure gauge is
A. Carnot D. Potential energy into used to measure:
B. Diesel heat energy A. Complex pressures
C. Rankine B. Variable pressures
D. Brayton 270. The Pitot tube is a device used C. Compound pressures
261. How do you treat a statement for measurement of: D. Positive and negative
that is considered a scientific A. Pressure
law? B. Flow pressures
A. We postulate to be true C. Velocity 281. Isentropic flow is:
D. Discharge
B. Accept as a summary A. Perfect gas flow
of experimental 271. The continuity equation is B. Ideal fluid flow
observation applicable to C. Frictionless reversible
A. Viscous, unviscous fluids
C. We generally observed B. Compressibility of fluids flow
C. Conservation of mass D. Reversible adiabatic
to be true D. Steady, unsteady flow
D. Believe to be derived flow
272. The work done by a force of R 282. Under ideal conditions,
from mathematical Newtons moving in a distance
theorem of L meters is converted entirely isothermal, isobaric, isochoric
262. An instrument commonly used into kinetic energy and and adiabatic processes are:
in most research and expressed by the equation:
engineering laboratories A. Dynamic processes
because it is small and fast A. = 2 B. Stable processes
B. = 2 C. Quasi-static processes
among the other thermometers. D. Static processes
A. Mercury thermometer C. = 283. One watt is:
B. Liquid-in-glass A. .
thermometer

C. Gas thermometer D. =
D. Thermocouple B. 1 .
263. In an actual gases, the 273. Gas being heated at constant at
molecular collisions are constant volume is undergoing C. 1 .
the process of:
A. Plastic A. Isentropic D. 1 .
B. Elastic B. Adiabatic
C. Inelastic C. Isometric 284. A temperature above which a
D. Inplastic D. Isobaric given gas cannot be liquefied:
264. Which of the following is used in A. Cryogenic temperature
thermal power plant? 274. Dew point is defined as: B. Vaporization temperature
A. Brayton A. The temperature to C. Absolute temperature
B. Reversed carnot which the air must be D. Critical temperature
cooled at constant
C. Rankine pressure to produce 285. The effectiveness of a body as
D. Otto saturation a thermal radiator at a given
265. The elongation and B. The point where the temperature.
compression of a helical spring pressure and A. Absorptivity
temperature lines meet B. Emissivity
is an example of: C. The temperature which C. Conductivity
A. Irreversible process dew is formed in the air D. reflectivity
B. Reversible process D. The pressure which dew
C. Isothermal process is formed in the air 286. Which of the following occurs in
a reversible polytropic process?
D. Adiabatic process 275. What do you call the changing A. Enthalpy remains
266. Otto cycle consists of: of an atom of element into an constant
atom of a different element with B. Internal energy does not
A. Two isentropic and two a different atomic mass? change
constant volume A. Atomization C. Some heat transfer
B. Atomic transmutation occurs
process D. Entropy remains
B. Two isentropic and two constant

constant pressure 10
processes

C. Two adiabatic and two
isothermal processes

287. The instrument used to B. W/mK generator, a device that
measure atmospheric pressure C. KJ/kgK incorporates both thermal and
D. J/m electric effects, will have the
is: 296. Which of the following is efficiency of a/an
A. Rotameter mathematically a
B. Manometer thermodynamic property? A. Carnot cycle
C. Venture B. Otto cycle
A. A point function C. Diesel cycle
D. Barometer B. Discontinuous D. Rankine cycle
288. A pneumatic tool is generally C. A path function 306. Both Stirling and Ericsson
D. Exact differential engines are
powered by 297. When the expansion or A. Internal combustion
A. Water compression of a gas takes
place “without transfer of heat” engine
B. Electricity to or from the gas, the process B. External combustion
C. Steam
D. air is called: engine
289. Which of the following gases A. Reversible C. Carnot engines
can be used to measure the B. Adiabatic D. Brayton engines
lowest temperature? C. Polytropic 307. Nozzles does not involve any
A. Nitrogen D. Isothermal work interaction. The fluid
B. Helium through this device
298. Another name for the liquid experiences:
C. Oxygen valve is: A. No change in
D. hydrogen A. Freon valve
290. The triple point of a substance potential energy
is the temperature and pressure B. Shut-off valve B. No change in kinetic
C. King valve
which: D. Master valve energy
A. the solid and liquid 299. A liquid whose temperature is C. No change in enthalpy
phases are in equilibrium lower that the saturation D. Vacuum
B. the solid and gaseous temperature corresponding to 308. If the actual kinetic energy of a
the existing pressure: nozzle is Ka and Ki is the
phases are in equilibrium A. Subcooled liquid maximum value that can be
C. the solid, liquid and attained by an isentropic
B. Saturated liquid expansion from an initial to final
gaseous phases are in C. Pure liquid state, then the efficiency of the
equilibrium D. Compressed liquid nozzle is:
300. The law that states “Entropy of
D. the solid does not melt, all perfect crystalline solids is A.
the liquid does not boil zero at absolute zero
and the gas does not temperature” B.
condense A. Zeroth law of
C.
291. Which of the following relations thermodynamics
is not applicable in a free B. First law of D.
expansion process?
A. Heat rejected is zero thermodynamics
C. Second law of
B. Wok done is zero 309. The convergent section of a
C. Change in temperature thermodynamics nozzle increases the velocity of
D. Third law of the flow of the gas. What does it
is zero to do on its pressure?
D. Heat supplied is zero thermodynamics A. Pressure becomes
292. Ericsson cycle 301. What should be the temperature constant
A. Two isothermal and B. Pressure equals the
of both water and steam velocity
two constant pressure whenever they are present C. It increases the
processes together? pressure
D. It decreases the
B. Two isothermal and two A. Saturation pressure
constant volume
processes temperature for the 310. In a closed vessel, when
existing pressure vaporization takes place, the
C. Two isothermal and two B. Boiling point of water at temperature rises. Due to the
101.325 KPa rising temperature, the pressure
constant entropy C. Superheated increases until an equilibrium is
processes established between the
D. Two adiabatic, one temperature temperature and pressure. The
constant volume and D. One hundred degrees temperature of equilibrium is
constant pressure called _____.
centigrade A. Dew point
processes 302. A manometer is an instrument B. Ice point
293. A Stirling cycle has C. Boiling point
that is used to measure: D. Superheated
A. Two adiabatic and two A. Air pressure temperature
B. Heat radiation
constant volume C. Condensate water level 311. At steam point, the
processes temperatures of water and its
B. Two adiabatic and two D. Air volume vapor at standard pressure are:
constant pressure 303. What is the area under the A. Extremes or maximum
processes B. Unity
curve of a temperature entropy C. In equilibrium
C. Two isothermal and two D. Undefined
constant pressure diagram?
processes A. Volume 312. When hot soup was served in a
B. Heat cup during dinner, an engineer
D. Two isothermal and C. Work was so eager to drink it. Since it
D. Entropy was hot, he added cubes of ice
two constant volume to cool the soup and stirred it.
processes 304. What do bodies at a He notices the dew starts to
294. The temperature of the fluid temperature above absolute form on the outermost surface
flowing under pressure through zero emit? of the cup. He wanted to check

a pipe is usually measured by: A. Energy 11
A. A glass thermometer B. Heat of convection
B. An electric resistance C. Thermal radiation
thermometer D. Heat of compression
305. In the absence of any
C. A thermocouple irreversibilities, a thermoelectric
D. All of the above
295. Specific heat capacity is an SI
derived unit describes as

A. J/kg

the temperature of the pressure is decreased, the 333. A body radiates heat
outermost surface of the cup. boiling temperature will: proportional to the fourth power
What is this temperature equal of its absolute temperature:
A. Increase A. Stefan-Boltzman law
to? B. Planck’s law
A. Superheated B. Decrease C. Kirchhoff’s law
temperature C. Remain the same D. Mawell’s law
B. Equal to zero D. Drop to zero
322. Which of the following is 334. All substances emit radiation,
C. Standard temperature equivalent to 1 hp in Btu/hr? the quantity and quality of which
D. Equal to air’s dew A. 778 depends upon the absolute
B. 2545 temperature and the properties
point temperature C. 746 of the material, composing the
313. What do you call a conversion radiating body.
D. 3.41 A. Stefan-Boltzman law
technology that yields electricity 323. What is the pressure above B. Planck’s law
straight from sunlight without C. Kirchhoff’s law
the aid of a working substance zero? D. Mawell’s law
like gas or steam without the
A. Gage pressure 335. For bodies in thermal
use of any mechanical cycle? B. Absolute pressure equilibrium with their
A. Power conversion C. Vacuum pressure environment, the ratio of total
B. Stirling cycle conversion D. Atmospheric pressure emissive power to the
C. Solar thermal 324. One Newton-meter is equal to: absorptivity is constant at any
A. 1 Joule temperature.
conversion B. 1 Btu A. Stefan-Boltzman law
D. Photovoltaic-energy C. 1 Calorie B. Planck’s law
C. Kirchhoff’s law
conversion D. 1 Ergs D. Mawell’s law
314. Which of the following property 325. Which of the following is the
336. According to Archimedes’
of liquid extend resistance to instrument used to measure Principle, the buoyant force on
angular or shear deformation: fluid velocity? a submerged object is equal to
which of the following?
A. Specific gravity A. Pitot tube A. Weight of the fluid not
B. Specific weight B. Orsat apparatus being displaced
C. Anemometer B. Weight of the displaced
C. Viscosity D. Viscosimeter fluid
D. Density 326. Cryogenic temperature ranges C. Weight of the object above
315. What is the pressure at the exit from: the fluid surface
of a draft tube in turbine? A. -150 ⁰F to -359 ⁰F D. Weight of the fluid
B. -250 ⁰F to -459 ⁰F displaced and the total
A. Below atmospheric weight of the object
B. Above atmospheric C. -100 ⁰F to -300 ⁰F
C. Atmospheric D. -200 ⁰F to -400⁰F 337. The reciprocal of Bulk Modulus
D. Vacuum 327. Steam at 2 KPa is saturated at of any fluid is called _______.
316. When changes in kinetic energy 17.5 ⁰C. In what state will the A. Volume strain
of a compressed gas are B. Volume stress
negligible or insignificant, the state be at 40 ⁰C if the pressure C. Compressiblity
work input to an adiabatic is 2.0 KPa? D. Shape elasticity

compressor is _____. A. Superheated 338. In a steady flow system, the
A. Negligible B. Saturated mass of the working substance
B. Zero is:
C. Infinity C. Subcoled A. Always conserved
D. Superheated B. Not equal
D. Equal to change in 328. Acceleration is proportional to C. Constant
enthalpy force. D. Infinity

317. What is the area under the A. Newtons law 339. If one end of the manometer is
curve of a pressure-volume B. Archimedes principle open to the atmosphere, it is
C. Law of gravitation called
diagram? D. Theory of relativity A. Open manometer
A. Nonflow work 329. Which of the following could be B. Closed manometer
B. Steadyflow work defined as simply push or pull? C. Differential manometer
C. Heat A. Power D. All of these
B. Inertia
D. Power 340. Turbulent flow is said to exist
318. In Stirling and Ericsson cycle, C. Work when:
D. Force A. Cross current exist
regeneration can 330. The true pressure measures B. Streamline, parallel in
A. Increase efficiency above a perfect vacuum is: direction
C. Pipe friction exist
B. Decrease efficiency A. Absolute pressure D. The velocity distribution in
C. Control efficiency B. Atmospheric cross section is uniform
D. Limit efficiency C. Gauge pressure
319. The first law of thermodynamics D. Vacuum pressure 341. Which of the following
is based on which of the 331. If an initial volume of an ideal flowmeters measure the
following principles? gas is compressed to one-half average fluid velocity in a pipe
A. Conservation of mass its original volume and to twice rather than a point or local
B. Enthalpy-entropy its original temperature, the velocity?
A. Humeter
relationship pressure: B. Venture meter
C. Entropy-temperature A. Doubles C. Speedometer
B. Halves D. Flowmeter
relationship C. Quadruples
D. Conservation of 342. The speed at which an exact
D. Triples model of the pump would have
energy 332. When the expansion of to run if it were designed to
320. In a two-phase system, 30%
compression of gas takes place 12
moisture means without transfer of heat to or
A. 70% liquid and 30%
from the gas, the process is
vapor called:
B. 70% vapor and 30%
A. Isometric process
liquid B. Isothermal process
C. 30% liquid and 100%
C. Isobaric process
vapor D. Adiabatic process
D. 30% vapor and 100%

liquid
321. At 101.325 KPa, the boiling

point of water is 100 ⁰C. If the

deliver 1 gpm against 1 ft head D. Internal energy 360. A hydrometer scale for
per stage. 352. In an Imhoff tank: measuring the relative density
(specific gravity) of liquids
A. Specific speed A. The effluent contains very A. Beckman scale
little dissolved oxygen B. Beaufort scale
B. Linear speed C. Baume scale
C. Rpm B. There are no setting D. Buckley scale
D. Pump capacity compartments
343. Fluid which exhibits linear 361. It refers to the fractional change
stress-strain rate relationship. If C. The sludge and raw in the volume of a fluid per unit
the shear stess in a fluid varies sewage are not mixed change in pressure in a
linearly with the velocity constant temperature process.
gradient, which of the following D. The sludge and fresh Which one?
sewage are well mixed to A. Proportional limit
describes the fluid? give complete digestion B. Compressibility
A. It is a viscous fluid C. Bulk modulus
B. It is a less viscous fluid 353. Reynolds number may be D. Capillarity
C. It is a Newtonian fluid calculated for
A. Diameter, density and 362. In a floating object, what do you
D. None of the above call the distance between the
344. States that pressure applied to absolute viscosity center of gravity and the
B. Diameter, velocity and metacenter?
a confined fluid acts equally in A. Metacentric height
all direction. absolute viscosity B. Buoyancy head
C. Characterictic length, C. Metacentric head
A. Pascal’s Principle D. Submerged height
B. Archimedes Principle mass flow rate per unit
C. Boyle’s Law 363. Which of the following is an
D. Dalton’s Law area, and absolute example of a Newtonian Fluid?
345. The measurement of fluid viscosity A. Motor oils
resistance when acted upon by D. Diameter, velocity, and B. Paints
external forces is: surface tension C. Gas
A. Viscosity 354. When a thin bore,hollow glass D. Clay slurries
tube is inserted into a container
B. Density of mercury, the surface of the 364. Which of the following
C. Flash point mercury in the tube: statements is TRUE about a
D. Tackiness fluid?
346. The difference between the sum A. Is below the container A. It has a very regular
of the absolute dynamic head at surface due to adhesion molecular structure
the outlet of the pump and the B. It is a liquid only
sum of the absolute dynamic B. Is below the container C. It cannot sustain a shear
head at the inlet, corrected to surface due to force at rest
D. Is can strain
the centerline of the pump is: cohesion
A. Total dynamic suction lift C. Is level with the surface of 365. Which of the following is the
B. Net positive suction head absolute property of liquid?
C. Total dynamic head the mercury in the A. Density
container B. Specific weight
D. Developed head C. Specific gravity
347. A leak from a faucet comes out D. Is above the container D. Weight density
surface due to cohesion
in separate drops. Which of the 366. Which of the following is not a
355. Absolute viscosity is essential unit of viscosity?
following is the main cause of independent of pressure and is A. SSU (Saybolt Second
this phenomenon? Universal)
primarily dependent on: B. Strokes
A. Surface tension A. Temperature C. Poise
B. Viscosity of the fluid B. Density D. Baume’
C. Air resistance C. Specific gravity
367. What do you call the pressure
D. Gravity D. Velocity which the fluid exerts on an
348. Which of the following is the 356. The sum of the pressure head, immersed object or container
walls?
basis of Bernoulli’s law for fluid elevation head and the velocity A. Normal pressure
head remains constant, this is B. Standard liquid pressure
flow? C. Hydrostatic pressure
A. The principle of known as: D. Gage pressure
conservation of energy A. Boyle’s Law
B. The continuity equation B. Torrecelli’s Theorem 368. Viscosity for a fluid is define as
C. The principle of C. Archimedes Principle the constant of proportionality
between shear stress and what
conservation of mass D. Bernoulli’s Theorem other variable?
D. Fourier’s Law 357. An instrument for measuring A. The spatial derivative of
349. A process has a pressure range velocity
of 0.001-1 atmosphere. A specific gravity of fluids: B. The time derivative of
pressure measuring instrument A. Hygrometer pressure
pressure at all times, the C. The time derivative of
instrument needed for a job is: B. Hydrometer density
A. Mercury manometer C. Flowmeter D. The spatial derivative of
D. Psychrometer density
B. Metallic diaphragm 358. The phenomenon by which air
C. Water manometer enters a submerged suction 369. What do you call the volume
D. Bordon pressure gauge pipe from the water surface is occupied by a unit mass of
350. Formation of bubbles in a low- called: fluid?
pressure area in a centrifugal A. Thixotropic A. Specific volume
pump and later their sudden B. Specific gravity
collapse, is called: B. Dilatant C. Density
A. Corrosion C. Vortex D. Specific weight
D. Vacuum
B. Cavitation 359. Which of the following 13
C. Compression statements is NOT correct?
D. Explosion A. Steady flow do not change
351. The sum of the three types of
energy at any point in the with time at any point
system is called: B. Bernoulli’s equation only
A. Pressure heads
B. Bernoulli’s Theorem holds on the same
streamline
C. Enthalpy C. The Reynolds number is
the ratio of the viscous

force to the inertial
force
D. For a fluid at rest,the
pressure is equal in all

directions

370. Viscosities can change with 379. Which is the classification of 387. Which of the following
time assuming all other the fluid flow if the fluid travels statements about Newtonian
conditions to be constant. If parallel to the adjacent layers fluid is most accurate?
viscosities increases with time and the paths of the individual A. Shear stress is
up to a finite value how do you particles do not cross each proportional to strain
call the fluid? other?
A. Pseudoplastic fluid A. Steady flow B. Shear stress is multi-
B. Rheopectic fluid B. Uniform flow valued
C. Laminar flow
C. Colloidal fluid D. Turbulent flow C. Viscosity is zero
D. Thixotropic fluid
371. The negative sign for a gage 380. The following are the basic D. Shear stress is
reading is called components of a fluid element proportional to rate of
A. Transmission of pressure in motion. Which one is NOT strain
B. Vacuum pressure included?
C. Vapor pressure A. Translation 388. The normal stress is the same
D. Pressure head B. Rotation in all directions at a point in
372. On a stationary floating object, C. Twist fluid:
the buoyant force acts upward D. Volume distortion A. Independent of the motion
through the centroid of the of one fluid layer relative
displaced volume. What do you 381. Which is the reciprocal of to an adjacent layer
call this centroid? absolute viscosity? B. When there is no motion
A. Center of pressure A. Viscosity gradient of one fluid layer
B. Center of Buoyancy relative to an adjacent
C. Center of volume B. Fluidity layer
D. Center of mass C. Only if the fluid is
373. Which of the following fluids C. Compressibility frictionless
exhibit viscosities that increase D. Onlt if fluid is frictionless
with increasing agitation but D. Viscosity index and incompressible
they return rapidly to their 382. For partially submerged
normal viscosity after the 389. Under which condition, the
agitation ceases? objectsto be stable, where does specific weight of water is 1000
A. Bingham fluids the metacenter be located? kg/m3?
B. Dilatant fluids A. At normal pressure of 760
C. Newtonian fluids A. Above the center of mm
D. Peudoplastic fluids gravity B. At 4oC temperature
374. Which of the following refers to C. At mean sea level
the measure of a fluid’s B. Below the center of gravity D. All of these
sensitivity to changes in C. To the left of the center of
viscosity with changes in 390. Which of the following
temperature? gravity statements is correct for oils of
A. Viscosity index D. To the right of the center of high viscosity index?
B. Viscosity ratio gravity A. Oil will immediately reacts
383. Absolute viscosity of a fluid in small temperature
C. Coefficient of velocity change
varies with the pressure and B. It continuously increase its
D. Viscosity factor temperature and is defined as a viscosity even if there is
375. In tubes having very small function of no change in
temperature
diameters, liquids are observed A. Density and angular C. It has fixed viscosity
to rise or fall relative to the level deformation rate D. Slight change in its
of the surrounding liquid. What viscosity with extreme
do you call this phenomenon? B. Density and shear stress temperature change
C. Shear stress and angular
A. Fluidity 391. SI unit if viscosity Pa-s is:
B. Surface tension deformation rate A. 10 times poise
D. Density, shear stress and B. 1/9.81 times poise
C. Capillarity C. 9.81 times poise
angular deformation rate D. 1/10 times poise
D. Viscosity 384. Density in terms of viscosity is
376. Which of the following is the 392. For computation convenience,
A. Kinematic fluids are usually classed as:
other name of velocity gradient? viscosity/dynamic A. Rotational or irrotational
A. Strain rate viscosity
B. Shear rate B. Real or ideal
C. Rate of shear formation B. Dynamic
D. All of these viscosity/kinematic C. Laminar or turbulent
viscosity D. Newtonian or non-
377. Which of the following is the
dominating cause of viscosities C. Kinematic viscosity x Newtonian
of liquids? dynamic viscosity 393. The statement that “the
A. Molecular cohesion
B. Molecular adhesion D. None of the above hydrostatic pressure a fluid
C. Molecular randomness 385. Liquids and gases take the exerts on an immersed object or
D. Molecular spacing on container walls is a function
following characteristic(s) of of fluid depth” is
378. Which of the following ratios their contents.
describes Reynolds number? A. The perfect gas law
A. Inertial forces/Viscous A. Volume B. D’Alembert’s paradox
forces B. Shape and volume C. The hydrostatic paradox
B. Drag forces/Bouyant D. Boyle’s Law
forces C. Shape 394. The hydraulic radius of
C. Bouyant forces/Inertial noncircular pipe is:
forces D. Neither shape nor volume A. The square root of the flow
D. Viscous forces/drag forces 386. Alcohol finds use in
area
manometers as: B. The ratio of the area to
A. It provides a suitable
meniscus for the the wetted perimeter
included tube C. The radius of a pipe of
B. Its density being less can
provide longer length for 14
a pressure difference,
thus more accuracy can
be obtained
C. A and B are correct
D. Cheap and easily available

equivalent area velocity C. Replace any two wires to
D. None of the above C. Sum of the coefficient of the rotor
395. A vena contracta in a fluid jet
issuing through a hole in a plate discharge and the D. Remove power leads
is located approximately: 412. Which of the following devices
A. 10 diameters downstream of coefficient of contraction
D. Difference of the used t measure the discharge of
the hole outflow from a vessel?
B. At jet’s minimum diameter coefficient of discharge
C. At the orifice minimum and the coefficient of A. Pitot tube
B. Pump head
diameter contraction C. Orifice
D. At the orifice maximum 404. In parallel pipe system D. Obstruction meter

diameter originating and terminating in 15
396. The following are all examples common junctions,
of indirect (secondary)
A. Mass flows through each
miscellaneous methods to branch are equal
measure flow except:
B. Pressure drops through
A. Turbine and propeller each branch are equal
meters
C. Lengths of each brach are
B. Magnetic flow meters equal

C. Positive displacement D. Flow areas of each branch
meters are equal

D. Hot-wire anemometers 405. The following are examples of
397. One could expect the possibility indirect (secondary)
measurements to measure flow
of Reynolds number similarity in rates using obstruction meters
all of the following cases
except: except:
A. Pitot static meters
A. Pumps B. Static pressure probes
C. Weight and mass scales
B. Turbines
C. Fans D. Direction-sensing probes
D. Weirs 406. Venturi meters, pitot static
398. One could expect the possibility
of Froude number similarity in gauges, orifice meters, flow
all of the following except: nozzles, and differential
A. Surface ships
B. Surface wave motion manometers all depend upon
the relationship between:
C. Flow over weirs
D. Closed-pipe turbulent A. Flow velocity and friction
B. Flow velocity and
pipe flow
399. One could expect the possibility pressure
C. Friction and pressure
of Froude number similarity in D. Pressure and mass flow
all of the following cases 407. Expansion factors take into
except: account the:
A. Area of the vena contracta
A. Motion of a fluid jet B. Small effect of friction and
B. Flow over spillways
C. Surge and flood waves turbulence of the orifice
D. Subsonic airfoils
400. The fact that a fluid’s velocity C. Changes in diameters of a
increases as the cross sectional converging pipe
area of the pipe through which it
flow decreases is due to: D. Effects of
compressibility
A. Bernoulli’s equation
B. The continuity equation 408. The matching of a scale model
C. The momentum equation and full-scale results for a fluid
D. The perfect gas law dynamic phenomena with a free
401. When a falling object reaches a surface requires equality of:
speed at which the drag force
equals its weight, it has A. Reynolds number
achieved: B. Froude number
C. Weber number
A. Mach one D. Cauchy number
B. A laminar boundary layer 409. The matching of a scale model
C. A turbulent boundary and full-scale prototype results
for a fluid dynamic phenomena
layer involving surface tension
D. Terminal velocity
402. The coefficient of discharge is requires equality of:
the ratio of the: A. Reynolds number
A. Area of vena contracta to B. Froude number
C. Weber number
the orifice area
B. Actual discharge to the D. Cauchy number
410. All of the following are forms of
theoretical discharge
C. Actual velocity to the drag on a body moving through
a fluid except:
theoretical velocity
A. Skin friction
D. Effective head to the B. Profile drag
actual head C. Wake drag
D. D’ Alembert’s paradox
403. The coefficient of velocity is
equal to the ratio of the: drag
A. Product of the coefficient 411. What must be done to change
of discharge and the
coefficient of contraction the direction of rotation of a
B. Actual velocity divided 440-volt, 3-phase induction

by the theoretical motor?
A. Reverse lines to start
winding
B. Interchange any two

power leads