Synchronous Motor MCQ Part 6

ElectricalEngineeringMCQ on Synchronous Motor

The rotor of the synchronous motor is of which construction type

The rotor of synchronous motor is:

1. Salient pole type
2. Non-salient pole type

Correct answer: 1. Salient pole type

The rotor of synchronous motor is of salient pole type construction.

The mechanical power developed by the synchronous motor is independent of which factor

The mechanical power developed by the synchronous motor is independent of which factor:

1. Torque angle
2. Field excitation
3. Speed
4. Applied stator voltage

Correct answer: 3. Speed

The magnitude of back EMF in synchronous motor depends on

The magnitude of back EMF in synchronous motor depends on:

1. Rotor flux
2. Rotor speed
3. D.C Excitation
4. 1 & 2

Correct answer: 3. D.C Excitation

As compared to unity power factor motors, a leading power factor synchronous motor cost

Leading PF synchronous motors cost ________ as compared to the unity PF motors:

1. More
2. Less
3. Same

Correct answer: 1. More

How does the rotor copper losses in synchronous motor are met

The rotor copper losses in synchronous motor are met by:

1. A.C Supply
2. D.C Supply
3. Armature input
4. None of the above

Correct answer: 2. D.C supply

The rotor copper losses in synchronous motor are met by DC Supply