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.Management Sciences
Category: Single Phase Induction Motors
A shaded pole motor can be used for_____________?
A. toys
B. hair dryers
C. circulators
D. any of the above
Which of the following statements regarding two value capacitor motor is incorrect ?
A. It is a reversing motor
B. It is preferred to permanent-split single-value capacitor motor where frequent reversals are required
C. It has low starting as well as rushing currents
D. It has high starting torque
Which of the following statements regarding reluctance-start motor is incorrect ?
A. It is similar to reluctance motor
B. It is basically an induction motor and not a synchronous one
C. So far as its basic working principle is concerned, it is similar to shaded pole motor
D. the air-gap between rotor and salient poles is non- uniform
A schrage motor can run on___________?
A. zero slip
B. negative slip
C. positive slip
D. all of the above
Locked rotor current of a shaded pole motor is____________?
A. equal to full load current
B. less than full load current
C. slightly more than full load current
D. several times the full load current
A universal motor can run on___________?
A. A.C. only
B. D.C. only
C. either A.C. or D.C.
D. none of the above
If the centrifugal switch does not open at 70 to 80 percent of synchronous speed of motor, it would result in_________?
A. damage to the starting winding
B. damage to the centrifugal switch
C. overloading of running winding
D. none of the above
In a hysteresis motor, the rotor must have____________?
A. retentivity
B. resistivity
C. susceptibility
D. none of the above
In split phase motor main winding is of _____________?
A. thin wire placed at the top of the slots
B. thin wire placed at the bottom of the slots
C. thick wire placed at the bottom of the slots
D. thick wire placed at the top of the” slots
The motor used for the compressors is____________?
A. d.c. series motor
B. shaded pole motor
C. capacitor-start capacitor-run motor
D. reluctance motor
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