If a 3-phase supply is given to the stator and rotor is short circuited rotor will move___________?

A. In the opposite direction as the direction of the rotating field
B. In the same direction as the direction of the field
C. In any direction depending upon phase squence of supply

As load on an induction motor goes on increasing______________?

A. Its power factor goes on decreasing
B. Its power factor remains constant
C. Its power factor goes on increasing even after full load
D. Its power factor goes on increasing up to full load and then it falls again

Slip ring motor is recommended where____________?

A. Speed control is required
B. Frequent starting, stopping and reversing is required
C. High starting torque is needed
D. All above features are required

In an induction motor the relationship between stator slots and rotor slots is that_____________?

A. Stator slots are equal to rotor slots
B. Stator slots are exact multiple of rotor slots
C. Stator slots are not exact multiple of rotor slots
D. None of the above

Low voltage at motor terminals is due to____________?

A. Inadequate motor wiring
B. Poorely regulated power supply
C. Any one of the above
D. None of the above

A 3-phase induction motor delta connected is carrying too heavy load and one of its fuses blows out. Then the motor______________?

A. Will continue running burning its one phase
B. Will continue running burning its two phase
C. Will stop and carry heavy current causing permanent damage to its winding
D. Will continue running without any harm to the winding

A 3-phase induction motor stator delta connected, is carrying full load and one of its fuses blows out. Then the motor_______________?

A. Will continue running burning its one phase
B. Will continue running burning its two phases
C. Will stop and carry heavy current causing permanent damage to its winding
D. Will continue running without any harm to the winding

Size of a high speed motor as compared to low speed motor for the same H.P. will be__________?

A. Bigger
B. Smaller
C. Same
D. Any of the above

Slip of an induction motor is negative when_____________?

A. Magnetic field and rotor rotate in opposite direction
B. Rotor speed is less than the synchronous speed of the field and are in the same direction
C. Rotor speed is more than the synchronous speed of the field and are in the same direction
D. None of the above

If an induction motor with certain ratio of rotor to stator slots, runs at 1/7 of the normal speed, the phenomenon will be termed as____________?

A. Humming
B. Hunting
C. Crawling
D. Cogging