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FLUID MECHANICS - REPORTS

OVERALL ANALYSIS COMPARISON REPORT SOLUTION REPORT

ALL(16) CORRECT(10) INCORRECT(4) SKIPPED(2)

Saurabh Kamble Q. 1
In the phenomenon of cavitation, the characteristic fluid property involved is
Course: GATE
Mechanical Engineering (ME) FAQ Have any Doubt ?

HOME A
MY TEST Surface tension
BOOKMARKS
MY PROFILE B
REPORTS Viscosity
BUY PACKAGE
ASK AN EXPERT C
Bulk modulus of elasticity

D
Vapour pressure

Your answer is Correct

Solution : 1/19
(d)

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(d)
Vapour pressure always play very important role in cavitation.

QUESTION ANALYTICS

Q. 2 FAQ Have any Doubt ?
Newton’s Law of viscosity depends upon the

A
Stress and strain in a fluid

B
Shear stress, pressure and velocity

C
Shear stress, and rate of strain

Your answer is Correct

Solution :
(c)
Newton’s Law of viscosity depends upon the shear stress, and rate of strain.

D
Viscosity and shear stress

QUESTION ANALYTICS

Q3 2/19

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2/4/2018 Q. 3 MADE EASY ONLINE TEST SERIES

The parameters which determine the friction factor for turbulent flow in a rough pipe are
FAQ Have any Doubt ?

A
Froude number and relative roughness

B
Froude number and mach number

C
Reynolds number and relative roughness

Your answer is Correct

Solution :
(c)
In laminar flow friction factor depend only on Reynolds number. But in case of turbulent flow, the
friction factor will depend upon Reynolds number and Roughness factor both.

D
Mach number and relative roughness

QUESTION ANALYTICS

Q. 4 FAQ Have any Doubt ?
Two pipe system in series are said to be equivalent when
3/19
A
the average diameter in both systems is the same

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B Your answer is Wrong
the average friction factor in both systems is the same Correct Option

C
total length of the pipe is the same in both system

D
the discharge under the same head is the same in both systems

Solution :
(d)

QUESTION ANALYTICS

Q. 5

An incompressible fluid is flowing through a contraction section of length L and has a 1–D (x–direction)

steady state velocity distribution, = 2 m/s and L = 3 m, the convective acceleration (in

m/s2) of the fluid at L is ___________.

FAQ Have any Doubt ?

8 Correct Option

Solution : 4/19
8

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Your Answer is 5.33

QUESTION ANALYTICS

Q. 6

In a steady incompressible flow, the velocity distribution is given by V is in

m/s and x, y and z are in m. In order to satisfy the mass conservation, the value of the constant P (in s–1) is
___________.

FAQ Have any Doubt ?

8 Your answer is Correct8

Solution :
8

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QUESTION ANALYTICS

Q. 7

In an orifice meter, if the pressure drop across the orifice is overestimated by 5% then the PERCENTAGE
error in the measured flow rate is ______________.

FAQ Have any Doubt ?

2.46 (2.40 - 2.50) Correct Option

Solution :
2.46 (2.40 - 2.50)

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QUESTION ANALYTICS

Q. 8

Water is flowing under laminar conditions in a pipe of length L. If the diameter of the pipe is doubled, for a
constant volumetric flow rate, the pressure drop across the pipe

FAQ Have any Doubt ?

A
Decreases 2 times

B Your answer is Correct
Decreases 16 times
7/19
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Solution :
(b)

C 8/19
Increases 2 times

D
Increases 16 times

QUESTION ANALYTICS

Q9

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2/4/2018 Q. 9 MADE EASY ONLINE TEST SERIES

Two and a half cumecs of water flows through a 50 cm diameter pipe. If the diameter is reduced 25 cm at
constant discharge, what would be the mean velocity ?

FAQ Have any Doubt ?

A
12.73 m/s

B
10 m/s

C Your answer is Correct
50.95 m/s

Solution :
(c)

D 9/19

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40.72 m/s

QUESTION ANALYTICS

Q. 10

Consider the following statements:
1. The specific gravity of water is one.
2. The specific gravity of mercury is 12.6.
3. The dimension of specific gravity is M°L°T °.
4. A vessel of 4000 litres contains an oil which weights 30 kN. The specific weight of the oil is 7.5 kN/m3.
Of these statements

FAQ Have any Doubt ?

A
1 and 2 are true

B
2 and 3 are true

C Your answer is Correct
1,3 and 4 are true

Solution :
(c)

D
1, 2, 3 and 4 are true

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QUESTION ANALYTICS

Q. 11

For flow of oil [μ = 0.1 kg/m-s, SG = 0.9] through a long, striaght smooth 5 cm diameter pipe at 14 m3/hr the
pressure drop per meter is approximately

FAQ Have any Doubt ?

A
2200 Pa

B Your answer is Correct
2535 Pa

Solution :
(b)

C 11/19
10000 Pa

D
160 Pa

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QUESTION ANALYTICS

Q. 12

A flat plate is exposed to a steady, constant density fluid flow with a free stream parallel to the axis of the
plate (case 1). In another case, this plate is replaced by a plate which is half the length of the previous plate
(case 2), all other conditions remaining unaltered. In both the cases, flow over the entire length of the plate is
laminar. What is the ratio of the drag coefficients for these two cases (Given: the local boundary layer

thickness δ scales as is the local Reynolds number at an axial coordinate x)?

FAQ Have any Doubt ?

A

B

C Your answer is Correct

Solution : 12/19
(c)

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D 13/19

QUESTION ANALYTICS

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Q. 13

Two vessels in which the difference of surface levels is maintained constant at 2.4 m are connected by a 75
mm diameter pipe 15 m long. If the friction coefficient is 0.008, the volume flow rate through the pipe is

__________ litres/sec. (Neglect minor losses)

FAQ Have any Doubt ?

11.975 (11.75 - 12.25) Correct Option

Solution :
11.975 (11.75 - 12.25)

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QUESTION ANALYTICS Your Answer is 11.144

Q. 14

The water flow rate through the siphon is 0.02 m3/s its temperature is 20°C, and the pipe diameter is 50 mm.
The maximum allowable height h, so that the pressure at point A is above the vapor pressure of water (2.34
kPa), is ________ m.

4.8(4.7-4.9) FAQ Have any Doubt ?
Correct Option
Solution :
4.8(4.7-4.9)

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Your Answer is 5.043

QUESTION ANALYTICS

Q. 15

A Pitot static pressure arrangement is used to measure velocity of air at 20°C. The centreline velocity of air,
for 40 mm deflection in the tube, is ___________ m/s.

Take density of air at 20°C = 1.2 kg/m3 FAQ Have any Doubt ?

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25.5 (25.0-26.0) Your answer is Correct25.55

Solution :
25.5 (25.0-26.0)

QUESTION ANALYTICS 17/19

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Q. 16

A piston compresses a gas in a cylinder by moving at a constant velocity ‘v’ = 2 cm/s. Let the gas density
and length at t = 0 be ρo  = 1.2 kg/m3 and Lo  = 20 cm. The gas density varies only with time. The density of
the gas at time t = 5 sec is _________ kg/m3.

2.4 (2.35 -2.45) FAQ Have any Doubt ?
Correct Option
Solution :
2.4 (2.35 -2.45)

QUESTION ANALYTICS 18/19

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TOPICWISE : FLUID MECHANICS & HYDRAULIC MACHINES-1 (GATE - 2019) - REPORTS

Saurabh Mahendra Kamble OVERALL ANALYSIS COMPARISON REPORT SOLUTION REPORT

Course: GATE ALL(17) CORRECT(5) INCORRECT(6) SKIPPED(6)
Mechanical Engineering (ME)
Q. 1 FAQ Solution Video Have any Doubt ?
HOME The dimension of dynamic viscosity is Your answer is Correct

MY TEST A MLT–1
B ML–1T
BOOKMARKS C ML–1T–1
Solution :
MY PROFILE (c)

REPORTS D ML2T

BUY PACKAGE QUESTION ANALYTICS

ASK AN EXPERT

OFFER
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK
PACKAGES

Q. 2

If a jet of water of area (A) strikes a velocity (V) through a series of flat plates mounted on a wheel of mean diameter D rotating at N rpm,
then force exerted will be equal to

FAQ Solution Video Have any Doubt ?

A

B Correct Option

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Saurabh Mahendra Kamble Solution : Saurabh Mahendra Kamble  Sign out
(b)
Course: GATE (Enroll User)
Mechanical Engineering (ME)
C
HOME
MY TEST D
BOOKMARKS
MY PROFILE QUESTION ANALYTICS
REPORTS
BUY PACKAGE Q. 3
ASK AN EXPERT In the given figure pressure P in kPa is
OFFER
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK
PACKAGES

A 37 FAQ Solution Video Have any Doubt ?
Your answer is Correct
Solution :
(a) 2/12

B 48
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D 51.3
Course: GATE (Enroll User)
Mechanical Engineering (ME) QUESTION ANALYTICS

HOME Q. 4
MY TEST
BOOKMARKS In a narrow though as shown below, the gauge pressure at point ‘A’ is 5.010 kPa. If surface tension of water is 0.075 N/m what will be radius
MY PROFILE of curvature of excess fluid at top
REPORTS
BUY PACKAGE A 21.74 mm FAQ Solution Video Have any Doubt ?
ASK AN EXPERT Correct Option
OFFER B 105.43 mm
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK C 10.87 mm
PACKAGES
Solution :
(c)

D 0.704 mm 3/12

QUESTION ANALYTICS
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Course: GATE Q. 5 (Enroll User) Sign out
Mechanical Engineering (ME)
Consider a floating body with center of gravity at ‘G’ and center of Buoyancy at ‘B’. Point ‘G’ is vertically below the ‘B’, the floating bodies
HOME condition is
MY TEST
BOOKMARKS FAQ Have any Doubt ?
MY PROFILE
REPORTS A stable Correct Option
BUY PACKAGE
ASK AN EXPERT Solution :
OFFER (a)
EXCLUSIVE OFFER FOR OTS If the floating body is bottom-heavy and thus the centre of gravity G is directly below the centre of buoyancy B, the body is always
STUDENTS ONLY ON BOOK stable. But unlike immersed bodies, a floating body may still be stable when G is directly above B. A measure of stability for floating
PACKAGES bodies is the metacentric height GM. A floating body is stable if point M is above point G, and thus GM is positive, and unstable if point
M is below point G, and thus GM is negative.

B unstable

C neutral

D can’t say anything because it depends on shape of body Your answer is Wrong

QUESTION ANALYTICS

Q. 6

If a certain liquid has viscosity 4.9 × 10–3 N s/m2 and kinematic viscosity 3.49 × 10–2 stokes, its specific gravity is ________.
FAQ Solution Video Have any Doubt ?

1.4 (1.3 - 1.5) Correct Option

Solution :
1.4 (1.3 - 1.5)

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Course: GATE (Enroll User)
Mechanical Engineering (ME)
Your Answer is 1404.011
HOME
MY TEST QUESTION ANALYTICS
BOOKMARKS
MY PROFILE Q. 7
REPORTS
BUY PACKAGE It is estimated that 90% of an iceberg’s volume is below the surface, while only 10% is visible to the surface. Fro seawater with a density of
ASK AN EXPERT 1025 kg/m3, the density of the iceberg will be _______.
OFFER
EXCLUSIVE OFFER FOR OTS FAQ Solution Video Have any Doubt ?
STUDENTS ONLY ON BOOK
PACKAGES 922.5 (920 - 925) 922.5
Your answer is Correct

Solution :
922.5 (920 - 925)

QUESTION ANALYTICS The discharge passing between the streamline passing through the points (1, 4) and (4, 4) is
FAQ Solution Video Have any Doubt ?
Q. 8 Correct Option
In a 2d flow
__________.

37.5

Solution :
37.5

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Your Answer is 16

QUESTION ANALYTICS

Saurabh Mahendra Kamble Q. 9

Course: GATE A jet of water 50 mm diameter having a velocity of 25 m/s, strikes normally a flat smooth plate.The thrust on the plate if the plate is moving
Mechanical Engineering (ME) in the same direction as the jet with a velocity of 5 m/s is __________ N.

HOME FAQ Solution Video Have any Doubt ?

MY TEST 785.4 (780 - 790) 785
Your answer is Correct
BOOKMARKS
Solution :
MY PROFILE 785.4 (780 - 790)

REPORTS QUESTION ANALYTICS

BUY PACKAGE Q. 10
What is the z-component of rotation for a 3-d flow field described by
ASK AN EXPERT
A 1 rad/s
OFFER
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK
PACKAGES

FAQ Solution Video Have any Doubt ?

B 2 rad/s Your answer is Wrong

C - 1 rad/s Correct Option
Solution :
6/12
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(c)
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Course: GATE (Enroll User)
Mechanical Engineering (ME)
D - 2 rad/s
HOME
MY TEST QUESTION ANALYTICS
BOOKMARKS
MY PROFILE Q. 11
REPORTS
BUY PACKAGE A carton which is carrying a mass of 5 tons (width = length = 4 m, height = 5 m), floats on water. The mass of contents of the vessel are
ASK AN EXPERT symmetrically placed. If the vessel tilts by 0.025 radians by moving a 60 kg carton from the centre by a distance of 1.5 m towards side in
OFFER horizontal direction. What is the metacentric height of the vessel ? (Take g = 9.81 m/s2)
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK FAQ Have any Doubt ?
PACKAGES
A 0.69 m

B 0.72 m Correct Option

Solution :
(b)

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Course: GATE (Enroll User)
Mechanical Engineering (ME)
C 1.04 m
HOME D 2.77 m
MY TEST
BOOKMARKS QUESTION ANALYTICS
MY PROFILE
REPORTS Q. 12 Solution Video Have any Doubt ?
BUY PACKAGE
ASK AN EXPERT What is the variation of hydrostatic pressure in isothermal condition for a compressible fluid.
OFFER Where P0, Z0 are initial condition and symbols have their usual meanings.
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK FAQ
PACKAGES
A

B

C Correct Option

Solution :
(c)

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Course: GATE (Enroll User)
Mechanical Engineering (ME)
D
HOME
MY TEST QUESTION ANALYTICS
BOOKMARKS
MY PROFILE Q. 13
REPORTS
BUY PACKAGE A steady, incompressible, two dimensional velocity field is given by,
ASK AN EXPERT
OFFER and y coordinates are in meter and the magnitude of velocity is in m/s.
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK Determine the value of stagnation points.
PACKAGES
FAQ Solution Video Have any Doubt ?

A

B Correct Option

C

Solution :
(c)

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QUESTION ANALYTICS (Enroll User)

Saurabh Mahendra Kamble Q. 14 The approximate resultant total
The component of velocity in a 2-D frictionless incompressible flow are
Course: GATE acceleration at the point (3, 2) and t = 2 is _______. FAQ Solution Video Have any Doubt ?
Mechanical Engineering (ME)
183.076 (180 - 185) 183.076
HOME Your answer is Correct
Solution :
MY TEST 183.076 (180 - 185)

BOOKMARKS

MY PROFILE

REPORTS

BUY PACKAGE

ASK AN EXPERT

OFFER
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK
PACKAGES

QUESTION ANALYTICS

Q. 15

If a fluid has viscosity 0.05 Poise and kinematic viscosity 0.035 Stokes. Then specific gravity of the fluid is _________.
FAQ Have any Doubt ?

1.43 (1.4 - 1.49) Correct Option

Solution :
1.43 (1.4 - 1.49)

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Course: GATE (Enroll User)
Mechanical Engineering (ME)
Your Answer is 23.544
HOME
MY TEST QUESTION ANALYTICS
BOOKMARKS
MY PROFILE Q. 16
REPORTS
BUY PACKAGE A water droplet of 2 mm diameter is atomized in to 200 equal spherical droplets. If surface tension of water is 0.073 N/m, the energy
ASK AN EXPERT required to do so is ______________× 10–6 J.
OFFER
EXCLUSIVE OFFER FOR OTS FAQ Solution Video Have any Doubt ?
STUDENTS ONLY ON BOOK
PACKAGES 4.45 (4.40 - 4.80) Correct Option

Solution :
4.45 (4.40 - 4.80)

QUESTION ANALYTICS 11/12

Q. 17
To damp the vibration following instrument is used. Take dynamic viscosity of oil as 6 × 10–4 Pa-s the damping torque value is ____________

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Saurabh Mahendra Kamble 10–5 N-m.

Course: GATE Saurabh Mahendra Kamble  Sign out
Mechanical Engineering (ME)
(Enroll User)
HOME
MY TEST 1.473 (1.42 - 1.52) FAQ Solution Video Have any Doubt ?
BOOKMARKS Correct Option
MY PROFILE Solution :
REPORTS 1.473 (1.42 - 1.52)
BUY PACKAGE
ASK AN EXPERT
OFFER
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK
PACKAGES

Your Answer is 11.78

QUESTION ANALYTICS 12/12
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TOPICWISE : FLUID MECHANICS & HYDRAULIC MACHINES-2 (GATE - 2019) - REPORTS

Saurabh Mahendra Kamble OVERALL ANALYSIS COMPARISON REPORT SOLUTION REPORT

Course: GATE ALL(17) CORRECT(1) INCORRECT(0) SKIPPED(16)
Mechanical Engineering (ME)
Q. 1 FAQ Solution Video Have any Doubt ?
HOME The terminal velocity of a small sphere settling in a viscous fluid varies as the Correct Option

MY TEST A inverse of the fluid viscosity
Solution :
BOOKMARKS (a)

MY PROFILE B inverse square of the diameter
C inverse of the diameter
REPORTS D first power of its diameter

BUY PACKAGE QUESTION ANALYTICS

ASK AN EXPERT

OFFER
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK
PACKAGES

Q. 2 FAQ Solution Video Have any Doubt ?
The Prandtl mixing length is Correct Option

A a universal constant 1/12
B zero at the pipe wall
Solution :

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Prandtl mixing length is the average distance travelled by the fluid particle in jumping from one layer to the other laySearutriallbithgMaianhsetnhdera Kamble 
Course: GATE
Mechanical Engineering (ME) velocity of the other layer. It is zero at the pipe wall. (Enroll User)

HOME C independent of shear stress
MY TEST
BOOKMARKS D independent of radial distance from pipe axis
MY PROFILE
REPORTS QUESTION ANALYTICS
BUY PACKAGE
ASK AN EXPERT Q. 3
OFFER The pressure drop for a relatively low  Reynold’s number flow in a 800 mm, 40 m long pipeline is 50 kPa, what is the wall shear stress?
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK Solution Video Have any Doubt ?
PACKAGES
A 300 Pa

B 250 Pa Correct Option

Solution :
(b)

C 200 Pa
D 150 Pa

QUESTION ANALYTICS

Q. 4 2/12
If coefficient of contraction is cc and h1 and h2 are the velocity heads at sections 1 and 2, the head loss due to sudden contraction is

FAQ Solution Video Have any Doubt ?

A

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Course: GATE B (Enroll User)
Mechanical Engineering (ME)
Solution : Correct Option
HOME (b)
MY TEST C
BOOKMARKS
MY PROFILE D
REPORTS
BUY PACKAGE QUESTION ANALYTICS
ASK AN EXPERT
OFFER Q. 5
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK At a point A in a pipeline carrying water the diameter is 1 m, the pressure 98 kPa and the velocity 1 m/s. At a point B, 2 m higher than A, the
PACKAGES diameter is 0.5 m and the pressure 20 kPa. Thedirection of flow would be

Solution Video Have any Doubt ?

A From A to B Correct Option

Solution :
(a)

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Saurabh Mahendra Kamble B B to A (Enroll User)
C Can’t be determined
Course: GATE D Always from high pressure to low pressure
Mechanical Engineering (ME)
QUESTION ANALYTICS
HOME
MY TEST Q. 6
BOOKMARKS
MY PROFILE A compound piping system (of total length 3600 m) consists of 1800 m length of 0.50 m diameter, 1200 m length, of 0.40 m diameter, and
REPORTS 600 m length of 0.30 m diameter. It is desired to replace this system with an equivalent pipe. The equivalent of lengths of 0.40 m pipe is
BUY PACKAGE _____ m.
ASK AN EXPERT
OFFER FAQ Solution Video Have any Doubt ?
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK 4318 (4300 - 4340) Correct Option
PACKAGES
Solution :
4318 (4300 - 4340)

QUESTION ANALYTICS 4/12

Q. 7
The percentage error in the estimation of discharge due to an error of 4% in the measurement of the reading of a differential connected to
an orifice meter is ____________%.

FAQ Solution Video Have any Doubt ?

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Course: GATE Solution : (Enroll User)
Mechanical Engineering (ME) 2

HOME QUESTION ANALYTICS
MY TEST
BOOKMARKS Q. 8
MY PROFILE
REPORTS A pump operates at a maximum efficiency of 82% and delivers 2.25 m3/s under a head of 18 m while running at 3600 rpm. Specific speed
BUY PACKAGE of pump is ______________.
ASK AN EXPERT
OFFER FAQ Have any Doubt ?
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK 618 (610 - 630) Correct Option
PACKAGES
Solution :
618 (610 - 630)

QUESTION ANALYTICS 5/12

Q. 9
Calculate the manometric head from the diagram below. (friction losses in the pipes are neglected)

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Saurabh Mahendra Kamble 21 FAQ Have any Doubt ?
Correct Option
Course: GATE Solution :
Mechanical Engineering (ME) 21
Manometric head is the net head imparted on the fluid by pump.
HOME              So net head = 10 + 5 + 6 = 21 m

MY TEST QUESTION ANALYTICS

BOOKMARKS Q. 10
Match List-I with List-II and select the correct answer using the codes given below the lists:
MY PROFILE

REPORTS

BUY PACKAGE

ASK AN EXPERT

OFFER
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK
PACKAGES

Aa FAQ Solution Video Have any Doubt ?
Correct Option
Bb
6/12
Solution :
(b)

Cc

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Dd
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QUESTION ANALYTICS
(Enroll User)

Saurabh Mahendra Kamble Q. 11
A hydraulic turbine has an output of 6400 kW when it works under a head of 10 m and runs at 100 rpm. What is the type of turbine?
Course: GATE
Mechanical Engineering (ME) FAQ Have any Doubt ?

HOME A Pelton wheel with single Jet

MY TEST B Pelton wheel with multiple Jet

BOOKMARKS C Francis

MY PROFILE D Kaplan Your answer is Correct

REPORTS Solution :
(d)
BUY PACKAGE

ASK AN EXPERT

OFFER
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK
PACKAGES

QUESTION ANALYTICS

Q. 12 where Vmax is velocity at the centre of the pipe. R is rise

Velocity distribution for a real fluid in pipe is given as, FAQ Solution Video Have any Doubt ?
radius, is velocity at radius r. The value of energy correction factor is Correct Option

A 1.7045 7/12

Solution :
(a)

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(a)

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Saurabh Mahendra Kamble 8/12

Course: GATE
Mechanical Engineering (ME)

HOME
MY TEST
BOOKMARKS
MY PROFILE
REPORTS
BUY PACKAGE
ASK AN EXPERT
OFFER
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK
PACKAGES

B 0.8012

C 2.0145

D 3.5042

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Saurabh Mahendra Kamble QUESTION ANALYTICS

Course: GATE Saurabh Mahendra Kamble  Sign out
Mechanical Engineering (ME)
(Enroll User)
HOME
MY TEST Q. 13
BOOKMARKS
MY PROFILE An aeroplane having a wing span of 16 m and chord of 2.5 m weights 110 kN. If it gets airborne at a velocity of 300 km/hr, in air of mass
REPORTS
BUY PACKAGE density 1.2 kg/m3, determine the coefficient of lift is nearly
ASK AN EXPERT FAQ Solution Video Have any Doubt ?
OFFER
EXCLUSIVE OFFER FOR OTS A 0.81
STUDENTS ONLY ON BOOK
PACKAGES B 0.72

C 0.66 Correct Option

Solution :
(c)

D 0.51

QUESTION ANALYTICS

Q. 14

For a turbulent flow in pipes determine the value of A (y = AR; where A is constant and y, R consists of usually meaning), at which the point
velocity is equal to the mean velocity of flow.

FAQ Have any Doubt ?

0.22 (0.20 - 0.24) Correct Option

Solution : 9/12
0.22 (0.20 - 0.24)

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Course: GATE (Enroll User)
Mechanical Engineering (ME)
QUESTION ANALYTICS
HOME
MY TEST Q. 15
BOOKMARKS
MY PROFILE A single acting single cylinder reciprocating pump is running at 50 rpm. If it  is required to force 50 litres per second of water along a
REPORTS delivery pipe. If the stroke of the plunger is twice the diameter and there is slip of 4%. The actual diameter of the cylinder is __________ cm.
BUY PACKAGE
ASK AN EXPERT FAQ Solution Video Have any Doubt ?
OFFER
EXCLUSIVE OFFER FOR OTS 34.14 (34.00 - 34.25) Correct Option
STUDENTS ONLY ON BOOK
PACKAGES Solution :
34.14 (34.00 - 34.25)

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Mechanical Engineering (ME)
QUESTION ANALYTICS
HOME
MY TEST Q. 16
BOOKMARKS Given that a laminar boundary layer at zero pressure gradient over a flat plate is described by the velocity profile,
MY PROFILE
REPORTS Where symbols  have their usual meanings. The ratio of displacement thickness to boudary layer is __________.
BUY PACKAGE Solution Video Have any Doubt ?
ASK AN EXPERT
OFFER 0.3637 (0.35 - 0.37) Correct Option
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK Solution :
PACKAGES 0.3637 (0.35 - 0.37)

  11/12

QUESTION ANALYTICS
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Saurabh Mahendra Kamble Q. 17 Saurabh Mahendra Kamble 

Course: GATE A venturimeter is to be fitted in a pipe 0.25 m diameter where the pressure head is 7.6 m of flowing liquid and the max(iEmnruomll Ufsleorw) is 8.1 Sign out
Mechanical Engineering (ME)
m3/min. The least diameter of the throat to ensure that the pressure head does not become negative is _________ mm. (Take k = 0.96).
HOME
MY TEST FAQ Solution Video Have any Doubt ?
BOOKMARKS
MY PROFILE 119.5 (118 - 121) Correct Option
REPORTS
BUY PACKAGE Solution :
ASK AN EXPERT 119.5 (118 - 121)
OFFER
EXCLUSIVE OFFER FOR OTS
STUDENTS ONLY ON BOOK
PACKAGES

QUESTION ANALYTICS

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BASIC : FLUID MECHANICS & HYDRAULIC MACHINES - REPORTS

OVERALL ANALYSIS COMPARISON REPORT SOLUTION REPORT

ALL(33) CORRECT(12) INCORRECT(7) SKIPPED(14)

Saurabh Kamble Q. 1

Course: GATE The difference between the total head line and the hydraulic grade line represents
Mechanical Engineering (ME) FAQ Solution Video Have any Doubt ?

HOME A
MY TEST velocity head
BOOKMARKS
MY PROFILE Correct Option
REPORTS
BUY PACKAGE Solution :
ASK AN EXPERT (a)

B 1/35
pressure head

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C Your answer is Wrong
elevation head

D
piezoelectric head

QUESTION ANALYTICS

Q. 2 FAQ Solution Video Have any Doubt ?
Continuity equation is based on the principle of

A
Conservation of volume

B
Conservation of energy

C
Conservation of angular momentum

D Your answer is Correct
Conservation of mass
2/35
Solution :
(d)
Continuity equation is based on the principle of conservation of mass.

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QUESTION ANALYTICS

Q. 3 Solution Video Have any Doubt ?

Stream line, path line and streak line are identical when the
FAQ

A
Flow is steady

Your answer is Correct

Solution :
(a)
For steady flow stream line, path line and streak-line are same.

B
Flow is uniform

C
Flor is neither steady nor uniform

D
Flow is non-uniform

QUESTION ANALYTICS

Q. 4 3/35

The surface tension of water in contact with air at 20°C is 0.0725 N/m. The pressure inside a droplet of

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water is to be 0.02 N/cm2 greater than the outside pressure. What should be the diameter of water droplet
(in cm)?

FAQ Solution Video Have any Doubt ?

A
0.145

Your answer is Correct

Solution :
(a)

B 4/35
1.45

C
14.5

D
0.0725

QUESTION ANALYTICS

Q. 5

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Which of the following statement is TRUE about metacentric radius?
FAQ Solution Video Have any Doubt ?

A
It is the distance between the metacentre and centre of gravity

B
It is the distance between the metacentre and centre of bouyancy

Correct Option

Solution :
(b)
The length BM is called the metacentric radius and it must not be confused with the metacentric height
GM. The term BM represents the metacentric radius. BM is an extremely important term. It is defined
as the vertical distance from the Center of Buoyancy to the Metacenter.

C
It is the distance between the centre of gravity and centre of bouyancy

D
There is no terms like this for stability of floating bodies

QUESTION ANALYTICS

Q. 6 5/35

Which of the following device is used to measure the difference of low pressures between two points?
FAQ Solution Video Have any Doubt ?

A
U-tube differential manometer

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B
U-tube manometer

C
Inverted U-tube differential manometer

Correct Option

Solution :
(c)
Inverted U-tube manometer uses a light manometer liquid, which is used to measure the difference of
low pressures between two points.

D
Both (a) and (c)

Your answer is Wrong

QUESTION ANALYTICS

Q. 7

Capillary tube viscometers used for measurement of viscosity are based on
FAQ Solution Video Have any Doubt ?

A
Stoke’s law

B Correct Option
Hagen-Poiseuille
6/35
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Solution :
(b)

C 7/35
Darcy-Weisbach equation

D
Both (b) and (c)

QUESTION ANALYTICS

Q. 8

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