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