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.Management Sciences
Category: Single Phase Induction Motors
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
The direction of rotation of universal motor can be reversed the by reversing the flow of current through__________?
A. armature winding
B. field winding
C. either armature winding or field winding
D. none of the above
Most of the fractional horsepower motors have either___________?
A. hard and annealed bearings
B. ball or roller bearings
C. soft and porous bearings
D. plain or sleeve bearings
A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will______________?
A. start and then stop
B. start and run slowly
C. start and run at rated speed
D. not start at all
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