Top 150+ Solved Synchronous Motors MCQ Questions Answer

a. the synchronous speed

b. less than synchronous speed

c. more than synchronous speed

d. none of the above

a. leading current

b. lagging current

c. both (a) and (b)

d. none of the above

a. gear train arrangement

b. transmission of mechancial power by shaft

c. distribution transformer

d. turbine

a. zero power factor leading

b. unity power factor

c. 0.707 power factor lagging

d. 0.707 power factor leading

a. d.c. excitation only

b. speed of the motor

c. load on the motor

d. both the speed and rotor flux

a. 2

b. 3

c. 4

d. 6

a. field current and armature current

b. terminal voltage and load factor

c. power factor and field current

d. armature current and power factor

a. speed

b. load

c. load angle

d. all of the above

a. lagging power factor only

b. leading power factor only

c. unity power factor only

d. lagging, leading and unity power factors

a. Windage loss

b. Bearing friction loss

c. Copper loss

d. Core loss

a. damper winding on rotor poles

b. damper winding on stator

c. damper winding on stator as well as rotor poles

d. none of the above

a. maintaining constant excitation

b. running the motor on leading power factors

c. providing damper bars in the rotor pole faces

d. oscillations cannot be damped

a. mild steel

b. chrome steel

c. alnico

d. stainless steel

a. leading

b. lagging

c. unity

d. zero

a. 1%

b. 0.5%

c. positive

d. zero