Related Questions

A pony motor is basically a
A small induction motor
B D.C. series motor
C D.shunt motor
D double winding A.C./D.C. motor
While starting a salient pole synchronous motor by induction motor action and connecting field discharge resistance across field, starting and accelerting torque is produced by
A induction motor torque in field winding
B induction motor torque in damper winding
C eddy current and hysteresis torque in pole faces
D reHetance motor torque due to saliency of the rotor
E all of the above methods
Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors?
A Low cost
B Wide speed range
C Stability
D High starting torque
In squirrel cage induction motors which of the following methods of starting cannot be used?
A Resistance in rotor circuit
B Resistance in stator circuit
C Autotransformer starting
D Star-delta starting
A direct on line starter is used: for starting motors
A Up to 5 H.P.
B Up to 10 H.P.
C Up to 15 H.P.
D Up to 20 H.P.
Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be
A Level compounded
B Under compounded
C Cumulatively compounded
D Differentially compounded
While starting a synchronous motor by induction motor action, field winding is usually
A connected to D.C. supply
B short-circuited by low resistance
C kept open-circuited
D none of the above
Which of the following AC. motors is usually used in large motor-generator sets?
A Synchronous motor
B Squirrel cage induction motor
C Slip ring induction motor
D Any of the above
Which of the following motors is non-self starting ?
A D.C. series motor
B synchronous motor
C Squirrel cage induction motor
D Wound round induction motor
Which of the following motors is inherently self starting ?
A Split motor
B Shaded-pole motor
C Reluctance motor
D None of these

Next steps