Testing and maintenance of electrical machine MCQ Questions and Answers
1. Wires carrying electric current are covered with good insulator for safety purpose. It is called _
Answer : D
2. A safety device which connected in series with live wire in circuit to protect equipments is called
Answer : C
3. Electric shock by high voltage and high current stops breating ______
Answer : C
4. Electric fire is extinguished by ______
Answer : C
5. Preventive maintenance is done due to the following :
Answer : D
Testing and maintenance of electrical machine MCQ
6. Factors considered during preparing maintenance schedule is/are
Answer : D
7. Causes of breakdown of machines are
Answer : A
8. Monthly maintenance of motor includes :
Answer : C
9. The function of conservator in a transformer is :
Answer : C
10. In power transformer, the breather is provided to
Answer : B
Testing and maintenance of electrical machine MCQ
11. Buchholz relay is used in :
Answer : B
12. Oil in the transformer is used for providing
Answer : D
13. In order to determine suitability of the oil in transformer tests carried out are :
Answer : D
14. Isolators used in transmission line are capable of breaking ______
Answer : C
15. The basic function of a circuit breaker is ______
Answer : C
Testing and maintenance of electrical machine MCQ
16. Earth tester is used to measure :
Answer : B
17. The main objective of foundation for electrical machine is :
Answer : D
18. Cause of vibration in electrical machine is :
Answer : B
19. Magnetisation current in three phase induction motor depends on :
Answer : D
Explanation : A large air-gap length leads to higher magnetizing current and poor power factor.
20. For proper parallel operation, alternators must have the same ______
Answer : B
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