Electrical Machines MCQ Multiple Choice Questions Answers | Quiz for Practice
Dive into the world of Electrical Machines with our comprehensive collection of multiple-choice questions and answers. Whether you're a student studying electrical engineering, an engineer designing power systems, or simply interested in the workings of motors and generators, our meticulously curated selection covers a wide range of topics. Explore fundamental concepts such as electromagnetic principles, motor operation, generator design, and practical applications in industries and utilities. With our user-friendly interface and detailed explanations, mastering the complexities of electrical machines has never been more engaging and accessible. Start your journey towards understanding the backbone of electrical power systems today!
Electrical Machines MCQ Questions for Practice
1. The power factor of the induction motor will be __________ if the magnetizing current is __________
Correct Answer is: High.....low
2. The magnetizing current of an induction motor will be __________ for __________ air gap
Correct Answer is: Smaller...........smaller
3. In induction motors, small air gap __________ power factor and __________ noise level
Correct Answer is: Reduces..........also reduces
4. In induction motors, the difference between the number of stator and rotor slots should not be
Correct Answer is: 5P
5. Induction motor which of the following depends on the leakage reactance?
Correct Answer is: Starting current
6. The use of double squirrel cage winding on the rotor provides
Correct Answer is: Higher efficiency
7. In induction motor if the number of rotor slots is equal to the stator slots then
Correct Answer is: The motor may refuse to start
8. In squirrel cage motors, skin effect occurs in
Correct Answer is: None of the above
9. A synchronous machine having large length of the air gap will have
Correct Answer is: Higher value of inherent regulation
10. Damper windings are provided in synchronous machines to
Correct Answer is: Facilitate starting
11. Which of the following motors has a high starting torque?
Correct Answer is: Synchronous motor
12. The starting winding of a single-phase motor is placed in
Correct Answer is: Field
13. In a DC series motor increase in load current results in
Correct Answer is: Increase in the back emf
14. Which DC motors has approximately constant speed?
Correct Answer is: All of the above.
15. An electric machine will have high efficiency when
Correct Answer is: kWh consumption is low
16. Inter poles in DC machines are provided to reduce
Correct Answer is: Efficiency
17. DC motor yoke is generally made of
Correct Answer is: Aluminum
18. The output of a rotating electrical machine is limited by
Correct Answer is: None of the above
19. The dimensions of a dc machine primarily depend on
Correct Answer is: None of the above
20. Skewing of rotor slots helps in
Correct Answer is: all of the above
21. The harmonics in rotating machines are generated due to
Correct Answer is: None of the above
22. The effect of harmonics in rotating machines can be minimized by
Correct Answer is: Use of distributed winding
23. In dc machines the number of poles is generally decided by
Correct Answer is: Weight of copper
24. In dc machines by increasing the number of poles, all of the following reduce except:
Correct Answer is: Overall size of the machine
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Multiple Choice Questions and Answers on Electrical Machines
Electrical Machines Multiple Choice Questions and Answers
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