Single Phase & Full-Wave MCQ Questions & Answers

Single Phase & Full-Wave MCQs : This section focuses on the "Single Phase & Full-Wave". These Multiple Choice Questions (MCQs) should be practiced to improve the Single Phase & Full-Wave skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

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

Question 2

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

Question 3

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

Question 4

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

Question 5

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

Question 6

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

Question 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

Question 8

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

Question 9

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

Question 10

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

A. 0.22

B. 0.78

C. 0.33

D. 0.44

Question 11

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

A. 0.48

B. 0.24

C. 0.82

D. 0.88

Question 12

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

A. 0.69

B. 0.59

C. 0.78

D. 0.15

Question 13

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

A. True

B. False

Question 14

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

A. True

B. False

Question 15

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

A. .32 A

B. .31 A

C. .25 A

D. .27 A

Question 16

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

A. 46.16 A

B. 42.15 A

C. 41.78 A

D. 41.18 A

Question 17

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

A. 11.54 A

B. 12.15 A

C. 15.48 A

D. 14.52 A

Question 18

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

A. 84.9 msec

B. 94.5 msec

C. 101.2 msec

D. 87.2 msec

Question 19

Calculate the fundamental component of source current in 1-Φ 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

Question 20

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

A. .154 A

B. .248 A

C. .128 A

D. .587 A

Question 21

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

A. 4.21 A

B. 4.61 A

C. 4.71 A

D. 4.52 A

Question 22

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

A. 10.53 A

B. 14.52 A

C. 44.92 A

D. 49.02 A

Question 23

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

A. .58 A

B. .57 A

C. .51 A

D. .52 A

Question 24

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

A. 0.22

B. 0.78

C. 0.33

D. 0.44

Question 25

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

A. 0.48

B. 0.24

C. 0.82

D. 0.88

Question 26

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

A. 0.69

B. 0.59

C. 0.78

D. 0.15

Question 27

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

A. TRUE

B. FALSE

Question 28

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

A. TRUE

B. FALSE