If the centrifugal switch does not open at 70 to 80 percent of synchronous speed of motor, it would result in_________?

Related Mcqs:

For which of the applications a reluctance motor is preferred ?

A. Electric shavers B. Refrigerators C. Signalling and timing devices D. Lifts and hoists...

In case of a shaded pole motor the direction of rotation of the motor is__________?

A. from main pole to shaded pole B. from shaded pole to main pole C. either of the above depending on voltage D. either of the above depending on power factor...

Which of the following statements regarding repulsion-start induction motor is incorrect ?

A. It requires more maintenance of commutator and other mechanical devices B. It makes quite a bit of noise on starting C. In fractional horse power motors, it has replaced the capacitor motors D. It is not easily reversed...

The rotor slots, in an induction motor, are usually not quite parallel to the shaft because it_____________?

A. improves the efficiency B. helps the rotor teeth to remain under the stator teeth C. helps in reducing the tendency of the rotor teeth to remain under the stator teeth D. improves the power factor...

If a D.C. series motor is operated on A.C. supply, it will____________?

A. spark excessively B. have poor efficiency C. have poor power factor D. all of the above...