Question: 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___________?

• 1. at the end connections
• 2. at the end terminals
• 3. anywhere on the winding inside a slot
• 4. at the slot edge where coil enters or comes out of the slot

Question: The value of starting capacitor of a fractional horse power motor will be__________?

• 1. 100 uF
• 2. 200 uF
• 3. 300 uF
• 4. 400 uF

Question: A centrifugal switch is used to dis- connect ‘starting winding when motor has___________?

• 1. run for about 1 minute
• 2. run for about 5 minutes
• 3. picked up about 50 to 70 per cent of rated speed
• 4. picked up about 10 to 25 per cent of rated speed

Question: In a shaded pole single-phase motor, the revolving field is produced by the use of_________?

• 1. inductor
• 2. capacitor
• 3. resistor
• 4. shading coils

Question: If a particular application needs high speed and high starting torque, then which of the following motor will be preferred ?

• 1. Universal motor
• 2. Shaded pole type motor
• 3. Capacitor start motor
• 4. Capacitor start and run motor

Question: Which of the following motor will have relatively higher power factor ?

• 1. Capacitor run motor
• 2. Shaded pole motor
• 3. Capacitor start motor
• 4. Split phase motor

Question: In a shaded pole motor, the shading coil usually consist of___________?

• 1. a single turn of heavy wire which is in parallel with running winding
• 2. a single turn of heavy copper wire which is short-circuited and carries only induced current
• 3. a multilayer fine gauge copper wire in parallel with running winding
• 4. none of the above

Question: The rotor developed by a single-phase motor at starting is___________?

• 1. more than i.he rated torque
• 2. rated torque
• 3. less than the rated torque
• 4. zero

Question: In a split phase motor____________?

• 1. the starting winding is connected through a centrifugal switch
• 2. the running winding is connected through a centrifugal switch
• 3. both starting and running windings are connected through a centrifugal switch
• 4. centrifugal switch is used to control supply voltage

Question: If the capacitor of a single-phase motor is short-circuited_________?

• 1. the motor will not start
• 2. the motor will run
• 3. the motor will run in reverse direction
• 4. the motor will run in the same direction at reduced r.p.m