Electrical Engineering MCQs on Synchronous Motor Part 13
In order to limit the operating temperature an electrical machine should have proper
In order to limit the operating temperature an electrical machine should have proper
- Current rating
- Power factor
- Speed
- Voltage rating
Correct answer: 1. Current rating
Generally, synchronous motors are of
Generally, synchronous motors are of
- Alternator type machines
- Induction type machines
- Salient pole type machines
- Smooth cylindrical type machines
Correct answer: 3. Salient pole type machines
The angle between the rotating stator flux and rotor poles is known as
The angle between the rotating stator flux and rotor poles is known as
- Obtuse angle
- Power factor angle
- Synchronizing angle
- Torque angle
Correct answer: 4. Torque angle
While starting a synchronous motor by induction motor action, the field winding is generally
While starting a synchronous motor by induction motor action, the field winding is generally
- Connected to D.C. supply
- Kept open-circuited
- Short-circuited by low resistance
- None of these
Correct answer: 3. Short-circuited by low resistance
A synchronous machine with large air gap has
A synchronous machine with large air gap has
- A higher synchronizing power which makes the machine less sensitive to load variations
- A higher value of stability limit
- A small value of inherent regulation
- All of these
Correct answer: 4. All of these