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
Related Mcqs:
- 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 - A 500 kW, 3-phase, 440 volts, 50 Hz, A.C. induction motor has a speed of 960 r.p.m. on full load. The machine has 6 poles. The slip of the machine will be__________?
A. 0.01
B. 0.02
C. 0.03
D. 0.04 - In a star-delta starter of an induction motor___________?
A. resistance is inserted in the stator
B. reduced voltage is applied to the stator
C. resistance is inserted in the rotor
D. applied voltage perl stator phase is 57.7% of the line voltage - A 3-phase 440 V, 50 Hz induction motor has 4% slip. The frequency of rotor e.m.f. will be____________?
A. 200 Hz
B. 50 Hz
C. 2 Hz
D. 0.2 Hz - In a three-phase induction motor, the number of poles in the rotor winding is always__________?
A. zero
B. more than the number of poles in stator
C. less than number of poles in stator
D. equal to number of poles in stator - 5 H.P., 50-Hz, 3-phase, 440 V, induction motors are available for the following r.p.m. Which motor will be the costliest ?
A. 730 r.p.m.
B. 960 r.p.m.
C. 1440 r.p.m.
D. 2880 r.p.m. - 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 - The torque developed by a 3-phase induction motor least depends on__________?
A. rotor current
B. rotor power factor
C. rotor e.m.f.
D. shaft diameter - Temperature of the stator winding of a three phase induction motor is obtained by___________?
A. resistance rise method
B. thermometer method
C. embedded temperature method
D. all above methods - The starting torque of a three phase induction motor can be increased by__________?
A. increasing slip
B. increasing current
C. both A. and (b)
D. none of the above
