Which of the following statements regarding two value capacitor motor is incorrect ?

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 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

Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because

A

it is comparatively cheaper

B

it has almost non-destructible capacitor

C

it has low starting as well as running currents at relatively high power factor

D

it is quiet in operation

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

If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then

A

motor will not come up to speed

B

motor will not carry the load

C

current drawn by the motor will be excessively high

D

electrolytic capacitor will, in all probability, suffer break down

A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?

A

Ceramic capacitor

B

Mica capacitor

C

Both will have identical value of capacitance

D

It depends on applied voltage

Which of the following statements regarding reluctance-start motor is incorrect ?

A

It is similar to reluctance motor

B

It is basically an induction motor and not a synchronous one

C

So far as its basic working principle is concerned, it is similar to shaded pole motor

D

the air-gap between rotor and salient poles is non- uniform

Which of the following statements regarding a reluctance motor is incorrect ?

A

It cannot be reversed, ordinarily

B

It requires no D.C. field excitation for its operation

C

It is nothing else but a single-phase, salient pole synchronous-induction motor

D

Its squirrel cage-rotor is of unsym-metrical magnetic construction in order to vary reluc-tance path between stator and rotor

Which of the following statements regarding repulsion-start induction motor is incorrect ?

A

It requires more maintenance of commutator and other mechanical devices

B

It makes quite a bit of noise on starting

C

In fractional horse power motors, it has replaced the capacitor motors

D

It is not easily reversed

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

Which of the following statements regarding two value capacitor motor is incorrect ?

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