SYNCHRONOUS MOTORS QUIZ

Angle of retardation

Torque angle

Synchronising angle

Power factor angle

One second

None of the listed here

One hour

One minute

None of the listed here

Pony motor

Damper winding

Variable frequency source

Load on the motor

Speed of the rotor

Dc excitation only

Both the speed and rotor flux

An inductor

A capacitor

None of the listed here

A resistor

stator supply is relieved of responsibility of producing magnetic field

synchronous motor has large air gap

mechanical load on the motor can be adjusted

synchronous motor runs at synchronous speed

supply voltage

maximum value of coupling angle

direction of rotation

rotor excitation

only at synchronous speed

below or above synchronous speed

while over-excited

when under loaded

arithmetic sum of Eb and V

vector sum of Eb and V

arithmetic difference of Eb and V

vector difference of Eh and V

None of the listed here

Approches synchronous speed

Is at standstill

Approches half synchronous speed