3-Phase Energy Recovery MCQs : This section focuses on the "3-Phase Energy Recovery". These Multiple Choice Questions (MCQs) should be practiced to improve the 3-Phase Energy Recovery skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
1600 V rated 8 SCRs are connected in series. The operation voltage of the string is 4400. Calculate the string efficiency.
A. 34.37 %
B. 30.15 %
C. 38.48 %
D. 35.84 %
Question 2
Calculate Kinetic energy of the object of mass = 7 Kg moving in a straight line with a velocity of 12 m/s.
A. 504 J
B. 502 J
C. 503 J
D. 509 J
Question 3
Calculate the average value of thyristor current in 3-? Full wave converter for the load current=729 A and ?=3°.
A. 254 A
B. 285 A
C. 247 A
D. 243 A
Question 4
Calculate the coefficient of fluctuation of speed using the data: Vmax(Fluctuation)=25 m/sec, Vmean=12 m/sec.
A. 2.08
B. 2.16
C. 2.34
D. 2.74
Question 5
Calculate the line voltage for 3-? 120° VSI if the value of DC supply is 96 V.
A. 68.25 V
B. 67.87 V
C. 66.25 V
D. 62.14 V
Question 6
Calculate the maximum fluctuation of speed using the data: Vmax=23 m/sec, Vmin=13 m/sec.
A. 12
B. 10
C. 14
D. 15
Question 7
Calculate the phase voltage for 3-? 120° VSI if the value of DC supply is 78 V.
A. 30.45 V
B. 15.18 V
C. 31.84 V
D. 48.15 V
Question 8
Calculate the r.m.s value of thyristor current in 3-? Full wave converter for the load current=2 A and ?=59°.
A. 1.15 A
B. 2.55 A
C. 2.07 A
D. 2.89 A
Question 9
Calculate the rotational kinetic energy of the object using the data: I=5 Kg-m2, ?=25 rad/sec.
A. 1.46 KJ
B. 1.56 KJ
C. 2.58 KJ
D. 3.15 KJ
Question 10
Flywheel is analogous to ___________
A. Chemical battery
B. Mechanical battery
C. Nuclear battery
D. Electrostatic battery
Question 11
Full form of IGBT is ___________
A. Insulated gate bipolar transistor
B. Insulated gate bipolar transducer
C. Insulator gate bidirectional transducer
D. Insulated gate bidirectional transistor
Question 12
Full form of KERS is ___________
A. The kinetic energy recovery system
B. The kinetic ever recovery system
C. Kin ever recovery system
D. The kinetic energy recovery store
Question 13
Rectifiers are used to convert DC power into variable AC power.
A. True
B. False
Question 14
Short circuit problem is severe in case of current source inverter.
A. True
B. False
Question 15
1600 V rated 8 SCRs are connected in series. The operation voltage of the string is 4400. Calculate the string efficiency.
A. 34.37%
B. 30.15%
C. 38.48%
D. 35.84%
Question 16
Calculate the average value of thyristor current in 3-Φ Full wave converter for the load current=729 A and α=3°.
A. 254 A
B. 285 A
C. 247 A
D. 243 A
Question 17
Calculate the line voltage for 3-∅ 120° VSI if the value of DC supply is 96 V.
A. 68.25 V
B. 67.87 V
C. 66.25 V
D. 62.14 V
Question 18
Calculate the phase voltage for 3-∅ 120° VSI if the value of DC supply is 78 V.
A. 30.45 V
B. 15.18 V
C. 31.84 V
D. 48.15 V
Question 19
Calculate the r.m.s value of thyristor current in 3-Φ Full wave converter for the load current=2 A and α=59°.
A. 1.15 A
B. 2.55 A
C. 2.07 A
D. 2.89 A
Question 20
Calculate the rotational kinetic energy of the object using the data: I=5 Kg-m2, ω=25 rad/sec.
A. 1.46 KJ
B. 1.56 KJ
C. 2.58 KJ
D. 3.15 KJ