Related Questions

Slip ring motor is preferred over squirrel cage induction motor where
A High starting torque is required
B Load torque is heavy
C Heavy pull out torque is required
D All of the above
Belted slip ring induction motor is almost invariably used for
A Water pumps
B Jaw crushers
C Centrifugal blowers
D None of the above
The shape of the torque/slip curve of induction motor is
A Parabola
B Hyperbola
C Rectangular parabola
D Straight line
The starting torque of a three phase induction motor can be increased by
A Increasing slip
B Increasing current
C Both (A) and (B)
D None of the above
A wound rotor induction motor is preferred, as compared to squirrel cage induction motor, when major consideration is
A Slop speed operation
B High starting torque
C Low windage losses
D All of the above
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
Slip ring motor is recommended where
A Speed control is required
B Frequent starting, stopping and reversing is required
C High starting torque is needed
D All above features are required
In an induction motor, no-load the slip is generally
A Less than 1 %
B 1.5 %
C 2 %
D 4 %
The number of slip rings on a squirrel cage induction motor is usually
A Two
B Three
C Four
D None
In induction motor, percentage slip depends on
A Supply frequency
B Supply voltage
C Copper losses in motor
D None of the above

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