28) Why external resistance is included in the rotor circuit at starting through 3 phase slipring induction motor starter?

To get high running torque

To reduce high starting current

To reduce the load current

To get increased speed at starting

Answer is:

To reduce high starting current

Will not run

Runs at slow speed

Runs at very high speed

Runs but not able to pull load

Answer is:

By cascade operation

By rotor rheostat control

By injecting emf in rotor circuit

By changing the applied frequency

Answer is:

Casecade operation method

By changing the number of stator poles

By injection Emf in rotor circuit

By changing the supplied voltage

Answer is:

Casecade operation method

Rotor rheostat speed control

Changing the applied frequency method

Changing the number of stator poles method

Answer is: