This book is produced to help students who take the DET30053 Power System course. This course is compulsory for students under Diploma in Elecrical Engineering (DET) program Quick Study is a book produced to help students in reviewing lessons quickly and easily. It contains a collection of past examination questions from the June 2019 session until June 2022 complete with answers according to the scoring system used in the examination at the polytechnic. Power System Quick Study is written using English and align with the syllibus to make it easier for students to use it. In the writing of this book, each question is grouped according to the topics found in the Power System course. The answers provided are written concisely so that it is easier for students to understand.