Electric Machine Daily Quiz #21

St1: The synchronous motor is not self-starting.

St2: Synchronous motor is a doubly excited machine.

1. Both are correct and St2 is correct explanation of St1
2. Both are correct but St2 is not correct explanation of St1
3. St1 is correct but St2 is wrong
4. St2 is correct but St1 is wrong

Damper bars are embedded in the-

1. Stator, along the length of the line
2. Rotor, in the quadrature axis
3. Rotor, in the direct axis
4. Pole faces, along the length of the pole

Synduction motor is-

1. Specially designed induction motor
2. Specially designed synchronous motor
3. Specially designed synchronous condenser
4. None of the above

“There is no HUNTING in Synduction motor.”

1. Always true
2. Always false
3. Depends on load and working parameters
4. No comments

Which is NOT the feature of a Synduction motor-

1. Stabler than the other synchronous motors
2. Minute mechanical vibrations
3. Specially designed for self-starting purpose
4. It has short circuited rings at ends of damper bars.
5. None