Title | Breakingpdf 1 |
---|---|
Author | PRASAD SHOURYA |
Course | Power system stability |
Institution | Sant Gadge Baba Amravati University |
Pages | 8 |
File Size | 696.6 KB |
File Type | |
Total Downloads | 3 |
Total Views | 147 |
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7/7/2021
Electrical Drives multiple choice questions and answers, MCQ objective quiz
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Electrical Drives Multiple Choice Questions and Answers Electrical Drives multiple choice questions and answers on Electrical Drives MCQ questions quiz on Electrical Drives objective type questions with answer for competitive exams and written test preparations for online Electrical Drives quiz Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject.
Electrical Drives MCQ Questions and Answers Quiz
1. A four quadrant operation requires A.
two full converter connected in back to back
B.
two full converters in series
C.
two full converters connected in parallel
D.
two semi converters connected in back to back
Answer-1
Post-Your-Explanation-1
2. To save energy during braking ................. braking is used? A.
regenerative
B.
dynamic
C.
plugging
D.
All of the above
Answer-2
Post-Your-Explanation-2
3. A 3 - F induction motor draws an electric current of 50 A from mains when starts by direct switching. If an auto transformer with 60 % tapping is used for starting the electric current drawn from the mains will be A.
50
B.
18
C.
36
D.
80
Answer-3
Post-Your-Explanation-3
4. A motor has a thermal heating time constant of 50 mm. When the motor runs continuous of full scale, its final temperature rise is 80° C, what would be the temperature rise after 1 hour, if the motor runs continuously on full load? A.
56 degrees
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B.
55.9 degrees
C.
58 degrees
D.
60 degrees
Answer-4
Post-Your-Explanation-4
5. An elevator drive is required to operate in A.
three quadrants
B.
one quadrant only
C.
two quadrants
D.
four quadrants
Answer-5
Post-Your-Explanation-5
6. Electric drive is becoming more and more popular because A.
it is simple and reliable
B.
it provide smooth and easy control
C.
it is cheaper in cost
D.
All of the below
Answer-6
Post-Your-Explanation-6
7. For an IM to operate in braking region slip should be always A.
is equal to 1
B.
less than zero
C.
greater than 1
D.
None of these
Answer-7
Post-Your-Explanation-7
8. Full form of VVVF control A.
variable VAr voltage frequency
B.
variable voltage VAr frequency
C.
VAr variable voltage frequency
D.
variable voltage variable frequency
Answer-8
Post-Your-Explanation-8
9. High braking torque produced in A.
regenerative braking
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B.
plugging
C.
dynamic braking
D.
None of these
Answer-9
Post-Your-Explanation-9
10. In 4 quadrant operation of a hoist 3rd quadrant represents A.
forward braking
B.
reverse motoring
C.
reverse braking
D.
forward motoring
Answer-10
Post-Your-Explanation-10
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