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Single phase AC-Motors

Total questions: 10

Worksheet time: 15mins

Name
Class
Date
1.

Which of the following is not recognized as part of a single-phase AC motor?

a)

Electrolytic Capacitor.

b)

Slip rings.

c)

Start windings.

d)

Start and Run windings.

2.

The difference between the synchronous speed and actual motor (Rotor) speed is called ………..?

a)

A- Skew angle.

b)

A- Phase Shifting.

c)

A- Slip.

d)

A- Speed switch.

3.

The centrifugal switch connects with ………...

a)

Run windings.

b)

Start windings.

c)

Both start and run windings.

d)

Capacitor unit.

4.

To increase starting torque in some AC motors

a)

The rotor bars are angled

b)

the supplied current increase

c)

The Supplied Voltage decrease

d)

the stator windings segregate

5.

The only section of wire that carry current in a direction ……………… to a magnetic field

a)

Parallel.

b)

Opposed.

c)

Perpendicular.

d)

All of the mentioned.

6.

In Split phase induction motors, the centrifugal switch connected to…..?

a)

Run windings

b)

Start Windings

c)

Both start and run windings

d)

None of any windings

7.

In which place the motor rotation be changed?

a)

Stator

b)

Terminal Box

c)

Rotor bars

d)

the shaft

8.

The correct place must be used to lift and move the motors is……?

a)

The mounting hole

b)

The motor enclosure

c)

The eye bolt.

d)

The motor shaft

9.

The centrifugal switch use to disconnect the start winding when the motor is rotating at about …………… of its full load speed

a)

75%

b)

80%

c)

70%

d)

73%

10.

Which of the following motor type has higher starting torque than others?

a)

The capacitor-start motor

b)

The split-phase motor.

c)

The Capacitor start - Capacitor runs motors.

d)

The Shaded pole motors.