A. slip ring induction motor
B. squirrel cage induction motor
C. both A. and (b)
D. none of the above
Related Mcqs:
- Slip rings are usually made of___________?
A. copper
B. carbon
C. phospor bronze
D. aluminium - In case the air gap in an induction motor is increased?
A. the magnetising current of the rotor will decrease
B. the power factor will decrease
C. speed of motor will increase
D. the windage losses will increase - In case the air gap in an induction motor is increased____________?
A. the magnetising current of the rotor will decrease
B. the power factor will decrease
C. speed of motor will increase
D. the windage losses will increase - Star-delta starting of motors is not possible in case of____________?
A. single phase motors
B. variable speed motors
C. low horse power motors
D. high speed motors - In case of the induction motors the torque is___________?
A. inversely proportional to (Vslip)
B. directly proportional to (slip)2
C. inversely proportional to slip
D. directly proportional to slip - In case of 3-phase induction motors, plugging means__________?
A. pulling the motor directly on line without a starter
B. locking of rotor due to harmonics
C. starting the motor on load which is more than the rated load
D. interchanging two supply phases for quick stopping - In case of a double cage induction motor, the inner cage has__________?
A. high inductance arid low resistance
B. low inductance and high resistance
C. low inductance and low resistance
D. high inductance and high resistance - The torque of an induction motor is___________?
A. directly proportional to slip
B. inversely proportional to slip
C. proportional to the square of the slip
D. none of the above - Which of the following component is usually fabricated out of silicon steel ?
A. Bearings
B. Shaft
C. Statorcore
D. None of the above - DOL starting of induction motors is usually restricted to_____________?
A. low horsepower motors
B. variable speed motors
C. high horsepower motors
D. high speed motors
