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AC 3 PHASE INDUCTION MOTOR
Set 6
Set 6
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Q13461
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Which type of starter is used to start and run the 3 phase slip ring induction motor?
A
Direct on-line starter
B
Rotor rheostat starter
C
Auto transformer starter
D
Manual star-delta starter
Q13462
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What is the purpose of using rotor resistance starter to start 3 phase slip ring induction motor?
A
Reduce rotor voltage
B
Increase rotor current
C
Increase the starting torque
D
Reduce the power loss
Q13463
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Why external resistance is included in the rotor circuit at starting through 3 phase slipring induction motor starter?
A
To get high running torque
B
To reduce high starting current
C
To reduce the load current
D
To get increased speed at starting
Q13464
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What is the effect of motor, if the rotor windings in slipring induction motor is open circuited at starting?
A
Will not run
B
Runs at slow speed
C
Runs at very high speed
D
Runs but not able to pull load
Q13465
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Which method is used to control the speed of 3 phase induction motor from stator side?
A
By cascade operation
B
By rotor rheostat control
C
By injecting emf in rotor circuit
D
By changing the applied frequency
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