Synchronous Motors MCQ Questions & Answers | Electrical Engineering

A. induction motor torque in field winding

B. induction motor torque in damper winding

C. eddy current and hysteresis torque in pole faces

D. reHetance motor torque due to saliency of the rotor

E. all of the above methods

A. will refuse to start

B. will overheat in spots

C. will not come upto speed

D. will fail to pull into step

A. vector sum of Eb and V

B. arithmetic sum of Eb and V

C. arithmetic difference of Eb and V

D. vector difference of Eh and V

A. speed

B. load

C. load angle

D. all of the above

A. number of poles

B. flux density

C. rotor speed

D. rotor excitation

A. mild steel

B. chrome steel

C. alnico

D. stainless steel

A. when under loaded

B. while over-excited

C. only at synchronous speed

D. below or above synchronous speed

A. leading

B. lagging

C. unity

D. zero

A. more than the supply voltage

B. less than the supply voltage

C. equal to the supply voltage

D. none of the above

A. zero

B. unity

C. lagging

D. leading