Polyphase Induction Motors - Interview Questions | Exam2Win

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51. The starting torque of a 3-phase squirrel cage induction motor is

A. twice the full load torque

B. 1.5 times the full load torque

C. equal to full load torque

D. 1.5 times the full load torque

Explanation:

52. The stating torque of the slip ring induction motor can be increased by adding

A. external inductance to the rotor

B. external resistance to the rotor

C. external capacitance to the rotor

D. both resistance and inductance to rotor

Explanation:

53. The power scale of circle diagram of an induction motor can be found from

A. stator resistance test

B. no-load test only

C. short-circuit test only

D. noue of the above

Explanation:

54. Which is of the following data is required to draw the circle diagram for an induction motor ?

A. Block rotor test only

B. No load test only

C. Block rotor test and no-load test

D. Block rotor test, no-load test and stator resistance test

Explanation:

55. In a three-phase induction motor

A. iron losses in stator will be negligible as compared to that in rotor

B. iron losses in motor will be neg�ligible as compared to that in rotor

C. iron losses in stator will be less than that in rotor

D. iron losses in stator will be more than that in rotor

Explanation:

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