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

Related Mcqs:

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

   A. 200 to 250 W
   B. 250 to 500 W
   C. 50 to 150 W
   D. 10 to 20 W

2. 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

3. 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

4. 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

5. 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

6. 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

7. Which of the following motor will give the highest starting torque ?

   A. D.C. shunt motor
   B. Schrage motor
   C. Repulsion start and induction run motor
   D. Universal motor

8. In A.C. series motor compensating winding is employed to_____________?

   A. reduce the effects of armature reaction
   B. increase the torque
   C. reduce sparking at the brushes
   D. none of the above

9. The starting winding of a single-phase motor is placed in_________?

   A. armature
   B. field
   C. rotor
   D. stator

10. If a single phase induction motor runs slower than normal, the most likely defect is_____________?

    A. worn bearings
    B. short-circuit in the winding
    C. open-circuit in the winding
    D. none of the above