A. D.C. shunt motor
B. D.C. series motor
C. A.C. induction motor
D. A.C. synchronous motor
Related Mcqs:
- Which of the following motors is non-self starting ?
A. D.C. series motor
B. synchronous motor
C. Squirrel cage induction motor
D. Wound round induction motor - In which of the following motors the stator and rotor magnetic field rotate at the same speed?
A. Universal motor
B. Synchronous motor
C. Induction motor
D. Reluctance motor - In which of the following motors the stator and rotor fields rotate simultaneously?
A. D.C. motor
B. Reluctance motor
C. Universal motor
D. Synchronous motor
E. Induction motor - Synchronous motors are generally not self-starting because:
A. the direction of rotation is not fixed
B. the direction of instantaneous torque reverses after half cycle
C. startes cannot be used on these machines
D. starting winding is not provided on the machines - The standard full-load power factor ratings for synchronous motors are___________?
A. zero or 0.8 leading
B. unity or 0.8 lagging
C. unity or 0.8 leading
D. unity or zero - The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order of_____________?
A. zero degree
B. two degrees
C. five degrees
D. ten degrees - Mostly, synchronous motors are of_____________?
A. alternator type machines
B. induction type machines
C. salient pole type machines
D. smooth cylindrical type machines - Synchronous motors are_____________?
A. not-self starting
B. self-starting
C. essentially self-starting
D. none of the above - For power factor correction, synchronous motors operate at____________?
A. no-load and greatly over-excited fields
B. no-load and under-excited fields
C. normal load with minimum excitation
D. normal load with zero excitation - Under which of the following conditions hunting of synchronous motor is likely to occur?
A. Periodic variation of load
B. Over-excitation
C. Over-loading for long periods
D. Small and constant load
