The direction of rotation of universal motor can be reversed the by reversing the flow of current through__________?

Related Mcqs:

1. Direction of rotation of a split phase motor can be reversed by reversing the connection of__________?

   A. running winding only
   B. starting winding only
   C. either A. or (b)
   D. both A. and (b)

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. In repulsion motor direction of rotation of motor____________?

   A. is opposite to that of brush shift
   B. is the same as that of brush shift
   C. is independent of brush shift

4. The direction of rotation of an hysteresis motor is determined by____________?

   A. interchanging the supply leads
   B. position of shaded pole with respect to main pole
   C. retentivity of the rotor material
   D. none of these

5. To reverse the direction of rotation of acapacitor start motor while it is running we should___________?

   A. disconnect motor from the supply till it stops then reconnect it to supply with reversed connection of main or auxiliary winding
   B. disconnect motor from supply and immediately reconnect it to supply with reversed connections of the main winding
   C. reverse the direction of connection of the auxiliary winding and after motor comes to rest then connect auxiliary winding to the supply
   D. reverse the direction of connections of the auxiliary winding and immediately connect it to supply

6. A universal motor can run on___________?

   A. A.C. only
   B. D.C. only
   C. either A.C. or D.C.
   D. none of the above

7. The speed of a universal motor is generally reduced by using_________?

   A. gear trains
   B. V-belts
   C. brakes
   D. chains

8. The speed of a universal motor is usually reduced by using____________?

   A. gearing
   B. belts
   C. brakes
   D. chains

9. 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

10. In a universal motor, the most common cause of brush sparking is___________?

    A. open armature winding
    B. shorted armature winding
    C. shorted field winding”
    D. high commutator mica
    E. all of the above