Electric Machine Daily Quiz #23

“Single phase induction motor is not self-staring” this phenomenon is explained by-

1. Fortesque theorem
2. Lily-Jordan Field theory
3. Double revolving field theory
4. Krav- Maga field theory

The slip in the backward wave is-

1. Same as of forward slip
2. Double of forward slip
3. 1- forward slip
4. 2- forward slip

Most of the 2 phase motors have-

1. Sinusoidal flux distribution
2. Uniform flux distribution
3. Flat topped flux distribution
4. Elliptical flux distribution

Auxiliary wdg of resistance start split phase motor has-

1. Less resistance due to more number of turns and thin wire
2. More resistance due to less number of turns and thick wire
3. Less reactance due to thin wire
4. More resistance due to less number of turns and thin wire

Which of the following is the cheapest but least efficient fractional motor?

1. Resistance start split phase motor
2. Capacitor start motor
3. Permanent capacitor run motor
4. 2 value capacitor motor