The value of starting capacitor of a fractional horse power motor will be__________?

Related Mcqs:

1. A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will______________?

   A. start and then stop
   B. start and run slowly
   C. start and run at rated speed
   D. not start at all

2. In a two value capacitor motor, the capacitor used for running purposes is_______________?

   A. air capacitor
   B. paper spaced oil filled type
   C. ceramic type
   D. a.c. electrolytic type

3. In a capacitor start single-phase motor, when capacitor is replaced by a resistance____________?

   A. torque will increase
   B. the motor will consume less power
   C. motor will run in reverse direction
   D. motor will continue to run in same direction

4. Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because_____________?

   A. it is comparatively cheaper
   B. it has almost non-destructible capacitor
   C. it has low starting as well as running currents at relatively high power factor
   D. it is quiet in operation

5. In a capacitor start motor, the phase displacement between starting and running winding can be nearly__________?

   A. 10°
   B. 30°
   C. 60°
   D. 90°

6. In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to_______________?

   A. improve power factor
   B. increase overload capacity
   C. reduce fluctuations in torque
   D. to improve torque

7. Which of the following statements regarding two value capacitor motor is incorrect ?

   A. It is a reversing motor
   B. It is preferred to permanent-split single-value capacitor motor where frequent reversals are required
   C. It has low starting as well as rushing currents
   D. It has high starting torque

8. If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then____________?

   A. motor will not come up to speed
   B. motor will not carry the load
   C. current drawn by the motor will be excessively high
   D. electrolytic capacitor will, in all probability, suffer break down

9. If the capacitor of a single-phase motor is short-circuited_________?

   A. the motor will not start
   B. the motor will run
   C. the motor will run in reverse direction
   D. the motor will run in the same direction at reduced r.p.m

10. After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on ______________?

    A. running winding
    B. rotor winding
    C. field winding
    D. compensating winding