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
Related Mcqs:
- 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 - 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 - 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) - The direction of rotation of universal motor can be reversed the by reversing the flow of current through__________?
A. armature winding
B. field winding
C. either armature winding or field winding
D. none of the above - 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 - A hysteresis motor works on the principle of__________?
A. hysteresis loss
B. magnetisation of rotor
C. eddy current loss
D. electromagnetic induction - Which of the following statements regarding hysteresis motor is in incorrect?
A. It is extremely sensitive to fluctuations in supply voltage
B. Its high starting torque is due to its high rotor hysteresis loss
C. It is extremely quiet in operation
D. It accelerates from rest to full-speed almost instantaneously - Hysteresis motor is particularly useful for high-quality record players and tape-recorders because___________?
A. it revolves synchronously
B. it is not subject to any magnetic or mechanical vibrations
C. it can be easily manufactured in extremely small sizes of up to 1 W output
D. it develops hysteresis torque which is extremely steady both in amplitude and phase - In a hysteresis motor, the rotor must have____________?
A. retentivity
B. resistivity
C. susceptibility
D. none of the above - The rotor of a hysteresis motor is made of___________?
A. aluminium
B. cast iron
C. chrome steel
D. copper
