Explore topic-wise MCQs in Electric Drives.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives knowledge and support exam preparation. Choose a topic below to get started.

1.

The problem of short-circuiting in 1- Full wave semi-converter is very common.

A. True
B. False
Answer» B. False
Discussion
2.

Diodes in 1- Full wave semi-converter protects the thyristor from short-circuiting.

A. True
B. False
Answer» B. False
Discussion
3.

Calculate the r.m.s value of diode current in 1- Full wave semi-converter for the load (Highly inductive) current=.2 A and =74 . (F.D configuration)

A. .154 A
B. .248 A
C. .128 A
D. .587 A
Answer» D. .587 A
Discussion
4.

Calculate the average value of diode current in 1- Full wave semi-converter for the load (Highly inductive) current=5.2 A and =11 . (F.D configuration)

A. .32 A
B. .31 A
C. .25 A
D. .27 A
Answer» C. .25 A
Discussion
5.

Calculate the average value of diode current in 1- Full wave semi-converter for the load (Highly inductive) current=75.2 A and =41 . (Asymmetrical configuration)

A. 46.16 A
B. 42.15 A
C. 41.78 A
D. 41.18 A
Answer» B. 42.15 A
Discussion
6.

Calculate the average value of thyristor current in 1- Full wave semi-converter for the load (Highly inductive) current=25.65 A and =18 . (Asymmetrical configuration)

A. 11.54 A
B. 12.15 A
C. 15.48 A
D. 14.52 A
Answer» B. 12.15 A
Discussion
7.

Calculate the r.m.s value of diode current in 1- Full wave semi-converter for the load (Highly inductive) current=5.1 A and =115 . (Asymmetrical configuration)

A. 4.21 A
B. 4.61 A
C. 4.71 A
D. 4.52 A
Answer» C. 4.71 A
Discussion
8.

Calculate the r.m.s value of thyristor current in 1- Full wave semi-converter for the load (Highly inductive) current=2.2 A and =155 . (Asymmetrical configuration)

A. .58 A
B. .57 A
C. .51 A
D. .52 A
Answer» C. .51 A
Discussion
9.

Calculate the r.m.s value of source current in 1- Full wave semi-converter for the load (Highly inductive) current=51.2 A and =15 .

A. 10.53 A
B. 14.52 A
C. 44.92 A
D. 49.02 A
Answer» E.
Discussion
10.

Calculate the fundamental component of source current in 1- Full wave bridge rectifier for the load(Highly inductive) current=78 A.

A. 78 A
B. 45 A
C. 69 A
D. 13 A
Answer» B. 45 A
Discussion
11.

Calculate the circuit turn-off time for 1- Full wave bridge rectifier for =145 . Assume the value of =5 rad/sec.

A. 84.9 msec
B. 94.5 msec
C. 101.2 msec
D. 87.2 msec
Answer» E.
Discussion
12.

Calculate the fundamental component of source current in 1- Full wave bridge rectifier for load(Highly inductive) current=3.14 A.

A. 2.82 A
B. 1.45 A
C. 3.69 A
D. 4.78 A
Answer» B. 1.45 A
Discussion
13.

Calculate the value of the fundamental displacement factor for 1- Full wave semi-converter if the firing angle value is 69 .

A. .48
B. .24
C. .82
D. .88
Answer» D. .88
Discussion
14.

Calculate the value of the fundamental displacement factor for 1- Full wave bridge rectifier if the firing angle value is 38 .

A. .22
B. .78
C. .33
D. .44
Answer» C. .33
Discussion
15.

Calculate the value of the Input power factor for 1- Full wave bridge rectifier if the firing angle value is 39 .

A. .69
B. .59
C. .78
D. .15
Answer» B. .59
Discussion