Quiz about Single Phase Induction Motor

Question 1

In a split phase motor, the running winding should have

Accepted Answer

low resistance and high inductance

Answer

high resistance and low inductance

Answer

high resistance as well as high inductance

Answer

low resistance as well as low inductiance

Question 2

If the capacitor of a single-phase motor is short-circuited

Accepted Answer

the motor will not start

Answer

the motor will run

Answer

the motor will run in reverse direction

Answer

the motor will run in the same direction at reduced r.p.m.

Question 3

In capacitor start single-phase motors

Accepted Answer

current in the starting winding leads the voltage

Answer

current in the starting winding lags the voltage

Answer

current in the starting winding is in phase with voltage in running winding

Answer

none of the above

Question 4

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

Accepted Answer

improve power factor

Answer

increase overload capacity

Answer

reduce fluctuations in torque

Answer

to improve torque

Question 5

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

Accepted Answer

90°

Answer

10°

Answer

30°

Answer

60°

Question 6

In a split phase motor

Accepted Answer

the starting winding is connected through a centrifugal switch

Answer

the running winding is connected through a centrifugal switch

Answer

both starting and running windings are connected through a centrifugal switch

Answer

centrifugal switch is used to control supply voltage

Question 7

The rotor developed by a single-phase motor at starting is

Accepted Answer

zero

Answer

more than i.he rated torque

Answer

rated torque

Answer

less than the rated torque

Question 8

Which of the following motor will give relatively high starting torque ?

Accepted Answer

Capacitor start motor

Answer

Capacitor run motor

Answer

Split phase motor

Answer

Shaded pole motor

Question 9

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

Accepted Answer

Capacitor run motor

Answer

Shaded pole motor

Answer

Capacitor start motor

Answer

Split phase motor

Question 10

In a shaded pole motor, the shading coil usually consist of

Accepted Answer

a single turn of heavy copper wire which is short-circuited and carries only induced current

Answer

a single turn of heavy wire which is in parallel with running winding

Answer

a multilayer fine gauge copper wire in parallel with running winding

Answer

none of the above

Practice Test On: Single Phase Induction Motor

Practice Test On:
Single Phase Induction Motor