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Three Phase Induction Motors
Three Phase Induction Motors
The shaft of an induction motor is made of
Cast iron
Stainless steel
High speed steel
Carbon steel
Cast iron
Stainless steel
High speed steel
Carbon steel
Answer
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Three Phase Induction Motors
The torque developed in the cage induction motor with auto-starter is
K × torque with direct switching
k/torque with direct switching
K2 × torque with direct switching
k2/torque with direct switching
K × torque with direct switching
k/torque with direct switching
K2 × torque with direct switching
k2/torque with direct switching
Answer
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Three Phase Induction Motors
Insertion of resistance in the rotor of an induction motor to develop a given torque
Rotor current remains same
Decreases the rotor current
Rotor current becomes zero
Increases the rotor current
Rotor current remains same
Decreases the rotor current
Rotor current becomes zero
Increases the rotor current
Answer
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Three Phase Induction Motors
Which of the following component is usually fabricated out of silicon steel?
None of these
Stator core
Bearings
Shaft
None of these
Stator core
Bearings
Shaft
Answer
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Three Phase Induction Motors
The rotor of an induction motor runs at
Any of the above
Synchronous speed
Above synchronous speed
Below synchronous speed
Any of the above
Synchronous speed
Above synchronous speed
Below synchronous speed
Answer
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