# Speed Control Principles MCQ Questions & Answers

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

Question 1

Calculate the moment of inertia of the sphere having a mass of 8.4 kg and radius of 61 cm.

A. 3.124 kgm2
B. 3.125 kgm2
C. 4.545 kgm2
D. 5.552 kgm2

Question 2

Calculate the power factor angle during the resonance condition.

A. 0°
B. 10°
C. 80°
D. 90°

Question 3

Calculate the value of the duty cycle if the system is on for 5 sec and off for inf sec.

A. 0
B. 0.4
C. 0.2
D. 0.1

Question 4

Calculate the value of the frequency if the time period of the signal is .2 sec.

A. 5 Hz
B. 4 Hz
C. 2 Hz
D. 3 Hz

Question 5

Calculate the value of the frequency of the AC supply in India.

A. 0 Hz
B. 50 Hz
C. 49 Hz
D. 60 Hz

Question 6

Calculate the value of the time period if the frequency of the signal is .07 sec.

A. 14.28 sec
B. 14.31 sec
C. 14.23 sec
D. 14.78 sec

Question 7

DC series motor cannot run under no load.

A. True
B. False

Question 8

In a DC shunt motor, the e.m.f developed is proportional to ___________

A. Ia
B. Ia2
C. Ia3
D. Iao

Question 9

In the chopper circuit, commutation times are _______

A. Current commutation is equal to voltage commutation
B. Current commutation is less as compared to that of voltage commutation
C. Current commutation is more as compared to that of voltage commutation
D. Both commutation techniques are not comparable

Question 10

The generated e.m.f from 4-pole armature having 1 conductors driven at 1 rev/sec having flux per pole as 10 Wb, with wave winding is ___________

A. 30 V
B. 40 V
C. 70 V
D. 20 V

Question 11

The most suitable control-motor application is __________

A. AC shunt motor
B. DC separately motor
C. AC one-phase induction motor
D. DC shunt motor

Question 12

The slope of the V-I curve is 13.89°. Calculate the value of resistance.

A. .247 ?
B. .345 ?
C. .231 ?
D. .222 ?

Question 13

The unit of voltage is Pascal.

A. True
B. False