In which single-phase motor the rotor has no teeth or winding ?
Universal motor
Hysteresis motor
Split phase motor
Reluctance motor
Hysteresis motor
In a two value capacitor motor the capacitor used for running purposes is
paper spaced oil filled type
air capacitor
ceramic type
a.c. electrolytic type
paper spaced oil filled type
Which of the following motors can be run on AC. as well as D.C. supply ?
Reluctance motor
Synchronous motor
Repulsion motor
Universal motor
Universal motor
In A.C. series motor compensating winding is employed to
reduce the effects of armature reaction
increase the torque
reduce sparking at the brushes
none of the above
reduce sparking at the brushes
Which of the following single-phase induction motors is generally used in time phonographs ?
Shaded pole
Universal
Capacitor start capacitor run
Resistance start
Shaded pole
Which of the following motors has highest starting torque ?
Capacitor-start motor
Shaped pole motor
Repulsion motor
Split-phase motor
Capacitor-start motor
In a single phase motor the centrifugal switch
reconnects the auxiliary winding of the motor
disconnects auxiliary winding of the motor
disconnects main winding of the motor
reconnects the main winding the motor
disconnects auxiliary winding of the motor
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
at the slot edge where coil enters or comes out of the slot
at the end connections
at the end terminals
anywhere on the winding inside a slot
at the slot edge where coil enters or comes out of the slot
In a capacitor start single-phase motor when capacitor is replaced by a resistance
motor will run in reverse direction
the motor will consume less power
torque will increase
motor will continue to run in same direction
motor will continue to run in same direction
The power factor of a single-phase induction motor is usually
always leading
unity
lagging
unity to 0.8 leading
lagging
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