Insertion of resistance in the stator of an induction motor___________?
(A) increases the load torque
(B) decreases the starting torque
(C) increases the starting torque
(D) none of the above
The rotor of an induction motor runs at__________?
(A) synchronous speed
(B) below synchronous speed
(C) above synchronous speed
(D) any of the above
In a star-delta starter of an induction motor___________?
(A) resistance is inserted in the stator
(B) reduced voltage is applied to the stator
(C) resistance is inserted in the rotor
(D) applied voltage perl stator phase is 57.7% of the line voltage
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
Reduced voltage starter can be used with_____________?
(A) slip ring motor only but not with squirrel cage induction motor
(B) squirrel cage induction motor only but not with slip ring motor
(C) squirrel cage as well as slip ring induction motor
(D) none of the above
A squirrel cage induction motor is not selected when___________?
(A) initial cost is the main consideration
(B) maintenance cost is to be kept low
(C) higher starting torque is the main consideration
(D) all above considerations are involved
In a shaded pole single-phase motor, the revolving field is produced by the use of_________?
(A) inductor
(B) capacitor
(C) resistor
(D) shading coils
If a particular application needs high speed and high starting torque, then which of the following motor will be preferred ?
(A) Universal motor
(B) Shaded pole type motor
(C) Capacitor start motor
(D) Capacitor start and run motor
Which of the following motor will have relatively higher power factor ?
(A) Capacitor run motor
(B) Shaded pole motor
(C) Capacitor start motor
(D) Split phase motor
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 above