In a capacitor start motor, the phase displacement between starting and running winding can be nearly

In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to

A

improve power factor

B

increase overload capacity

C

reduce fluctuations in torque

D

to improve torque

In a capacitor start single-phase motor, when capacitor is replaced by a resistance

A

torque will increase

B

the motor will consume less power

C

motor will run in reverse direction

D

motor will continue to run in same direction

In a two value capacitor motor, the capacitor used for running purposes is

A

air capacitor

B

paper spaced oil filled type

C

ceramic type

D

a.c. electrolytic type

While starting a synchronous motor by induction motor action, field winding is usually

A

connected to D.C. supply

B

short-circuited by low resistance

C

kept open-circuited

D

none of the above

While testing a capacitor with ohm meter, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is

A

Short-circuited

B

Open circuited

C

Alright

D

Leaky

In a split phase motor, the running winding should have

A

high resistance and low inductance

B

low resistance and high inductance

C

high resistance as well as high inductance

D

low resistance as well as low inductiance

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

The starting winding of a single-phase motor is placed in

A

Armature

B

Field

C

Rotor

D

Stator

After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on

A

running winding

B

rotor winding

C

field winding

D

compensating winding

Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a

A

Magnetic relay

B

Thermal relay

C

Centrifugal switch

D

None of the above

In a capacitor start motor, the phase displacement between starting and running winding can be nearly

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