Computer Programming MCQs

5739 MCQs  (Page 70 of 574)

If a particular application needs high speed and high starting torque, then which of the following motor will be preferred ?
A. Universal motor
B. Shaded pole type motor
C. Capacitor start motor
D. Capacitor start and run motor
A centrifugal switch is used to dis- connect ‘starting winding when motor has___________?
A. Run for about 1 minute
B. Run for about 5 minutes
C. Picked up about 50 to 70 per cent of rated speed
D. Picked up about 10 to 25 per cent of rated speed
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
The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be___________?
A. At the end connections
B. At the end terminals
C. Anywhere on the winding inside a slot
D. At the slot edge where coil enters or comes out of the slot
In a single phase motor the centrifugal switch____________?
A. Disconnects auxiliary winding of the motor
B. Disconnects main winding of the motor
C. Reconnects the main winding the motor
D. Reconnects the auxiliary winding of the motor
Which of the following motors is used in mixies ?
A. Repulsion motor
B. Reluctance motor
C. Hysteresis motor
D. Universal motor
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