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.Management Sciences
Category: Single Phase Induction Motors
The value of starting capacitor of a fractional horse power motor will be__________?
A. 100 uF
B. 200 uF
C. 300 uF
D. 400 uF
In case of high speed universal motor which of the following needs more attention?
A. End play
B. Air gap
C. Insulation in rotor
D. Balancing of rotor
A centrifugal switch is used to dis- connect ‘starting winding when motor has___________?
A. run for about 1 minute
B. run for about 5 minutes
C. picked up about 50 to 70 per cent of rated speed
D. picked up about 10 to 25 per cent of rated speed
The speed of a universal motor is usually reduced by using____________?
A. gearing
B. belts
C. brakes
D. chains
The speed of a universal motor is generally reduced by using_________?
A. gear trains
B. V-belts
C. brakes
D. chains
Speed torque characteristic of a repulsion induction motor is similar to that of a D.C____________?
A. shunt motor
B. series motor
C. compound motor
D. separately excited motor
Which of the following motors will operate at high power factor ?
A. Shaped pole motor
B. Split phase motor
C. Capacitor start motor
D. Capacitor run motor
Short-circuiter is used in_____________?
A. repulsion induction motor
B. repulsion motor
C. repulsion start induction run motor
D. none of the above
Which of the following motor will have relatively higher power factor ?
A. Capacitor run motor
B. Shaded pole motor
C. Capacitor start motor
D. Split phase motor
The motor used on small lathes is usually_________?
A. universal motor
B. D.C. shunt motor
C. single-phase capacitor run motor
D. 3-phase synchronous motor
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