The wattage rating for a ceiling fan motor will be in the range_________?

Related Mcqs:

1. The wattage of motor for driving domestic sewing machine will be around__________?

   A. 100 to 150 W
   B. 40 to 75 W
   C. 10 to 30 W
   D. 5 to 10 W

2. 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

3. A.C. series motor as compared to D.C. series motor has__________?

   A. smaller brush width
   B. less number of field turns
   C. more number of armature turns
   D. less air gap
   E. all of the above

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 case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will_____________?

   A. become unstable
   B. draw excessive armature current and may burn out
   C. fall out of synchronism and come to stand still
   D. run as induction motor

6. Which of the following motor will have relatively higher power factor ?

   A. Capacitor run motor
   B. Shaded pole motor
   C. Capacitor start motor
   D. Split phase motor

7. Single phase induction motor usually operates on__________?

   A. 0.6 power factor lagging
   B. 0.8 power factor lagging
   C. 0.8 power factor leading
   D. unity power factor

8. The speed control of universal motor used for sewing machines is by____________?

   A. friction
   B. varying the resistance
   C. tapping the field
   D. centrifugal mechanism

9. In repulsion motor, zero torque is developed when___________?

   A. brush axis is 45° electrical to field axis
   B. brush axis coincides with the field axis
   C. brush axis is 90° electrical to field axis
   D. both B. and (c)

10. Which of the following statements regarding a reluctance motor is incorrect ?

    A. It cannot be reversed, ordinarily
    B. It requires no D.C. field excitation for its operation
    C. It is nothing else but a single-phase, salient pole synchronous-induction motor
    D. Its squirrel cage-rotor is of unsym-metrical magnetic construction in order to vary reluctance path between stator and rotor