Question: Which of the following motors is inherently self starting ?

• 1. Split motor
• 2. Shaded-pole motor
• 3. Reluctance motor
• 4. None of these

Question: The direction of rotation of an hysteresis motor is determined by____________?

• 1. interchanging the supply leads
• 2. position of shaded pole with respect to main pole
• 3. retentivity of the rotor material
• 4. none of these

Question: A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will______________?

• 1. start and then stop
• 2. start and run slowly
• 3. start and run at rated speed
• 4. not start at all

Question: Which of the following motors is used in mixies ?

• 1. Repulsion motor
• 2. Reluctance motor
• 3. Hysteresis motor
• 4. Universal motor

Question: In a single phase motor the centrifugal switch____________?

• 1. disconnects auxiliary winding of the motor
• 2. disconnects main winding of the motor
• 3. reconnects the main winding the motor
• 4. reconnects the auxiliary winding of the motor

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