Slip rings are usually made of___________?
Slip rings are usually made of___________?
A. copper
B. carbon
C. phospor bronze
D. aluminium
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The torque of an induction motor is___________?
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 aboveIn case of 3-phase induction motors, plugging means__________?
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 stopgThe frame of an induction motor is usually made of____________?
The frame of an induction motor is usually made of____________?A. silicon steel
B. cast iron
C. aluminium
D. bronzeTemperature of the stator winding of a three phase induction motor is obtained by___________?
Temperature of the stator winding of a three phase induction motor is obtained by___________?A. resistance rise method
B. thermometer method
C. embedded temperature method
D. all above methodsFor driving high inertia loads best type of induction motor suggested is_____________?
For driving high inertia loads best type of induction motor suggested is_____________?A. slip ring type
B. squirrel cage type
C. any of the above
D. none of the aboveIn an induction motor the relationship between stator slots and rotor slots is that_____________?
In an induction motor the relationship between stator slots and rotor slots is that_____________?A. stator slots are equal to rotor slots
B. stator slots are exact multiple of rotor slots
C. stator slots are not exact multiple of rotor slots
D. none of the above