A universal motor can run on___________?
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
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In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will_____________?
In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will_____________?A. become unstable
B. draw excessive armature current and may burn out
C. fall out of synchronism and come to stand still
D. run as induction motorIn a shaded pole motor, the shading coil usually consist of___________?
In a shaded pole motor, the shading coil usually consist of___________?A. a single turn of heavy wire which is in parallel with running winding
B. a single turn of heavy copper wire which is short-circuited and carries only induced current
C. a multilayer fine gauge copper wire in parallel with running winding
D. none of the aboveIn case of a shaded pole motor the direction of rotation of the motor is__________?
In case of a shaded pole motor the direction of rotation of the motor is__________?A. from main pole to shaded pole
B. from shaded pole to main pole
C. either of the above depending on voltage
D. either of the above depending on power factorA 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 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 allThe shaded pole motor is used for__________?
The shaded pole motor is used for__________?A. high starting torque
B. low starting torque
C. medium starting torque
D. very high starting torqueIf the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then____________?
If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then____________?A. motor will not come up to speed
B. motor will not carry the load
C. current drawn by the motor will be excessively high
D. electrolytic capacitor will, in all probability, suffer break down