Synchronous Motors MCQ Questions & Answers | Electrical Engineering

A. Not-self starting

B. Self-starting

C. Essentially self-starting

D. None of the above

A. zero or 0.8 leading

B. unity or 0.8 lagging

C. unity or 0.8 leading

D. unity or zero

A. the stator current will be zero

B. the stator current will be very small

C. the stator current will be very high

D. the back e.m.f. will be more than the supply voltage

A. 1%

B. 0.5%

C. positive

D. zero

A. a series motor

B. an induction motor

C. an alternator

D. a rotary converter

A. no slip-rings

B. one slip-ring

C. two slip-rings

D. three slip-rings

A. changing the load

B. changing the supply voltage

C. changing frequency

D. using brakes

A. zero power factor leading

B. unity power factor

C. 0.707 power factor lagging

D. 0.707 power factor leading

A. it runs at a slower speed

B. the motor stops

C. it continues to run at the same speed

D. it runs at a very high speed

A. pony motor

B. D.C. compound motor

C. providing damper winding

D. any of the above