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AC 3 PHASE INDUCTION MOTOR
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Q13456
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Which type of starter is used with reduced voltage tappings for 3 phase induction motor?
A
D.O.L starter
B
Star delta starter
C
Auto transformer starter
D
Rotor resistance starter
Q13457
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How the voltage is reduced in auto transformer starter at the time of starting?
A
By reducing supply voltage
B
By adjusting the tappings by handle
C
By using step down transformer
D
By adding resistance with rotor
Q13458
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Which induction motor, the external resistance is added to rotor circuit?
A
Squirrel cage induction motor
B
Double squirrel cage induction motor
C
Slip ring induction motor
D
Single phase induction motor
Q13459
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Which motor is used to produce high starting torque at variable speed?
A
Repulsion motor
B
Permanent capacitor motor
C
3 Phase slip ring induction motor
D
3 Phase single squirrel cage induction motor
Q13460
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Why slip ring induction motor is fitted with wound rotor?
A
To reduce the slip
B
To control the speed
C
To reduce the losses
D
To get high starting and running torque
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