Hussain H
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Hussain H
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Question 1 of 19

1

What is the name of the transformer with one common winding?

Select one of the following:

  • Autotransformer

  • Step-down transformer

  • Current transformer

  • Step-up transformer

Explanation

Question 2 of 19

1

The output of electrical motor is:

Select one of the following:

  • Magnetic

  • Mechanical

  • chemical

  • light

Explanation

Question 3 of 19

1

Which of the following is used to check the heat element's continuity?

Select one of the following:

  • ohmmeter

  • Voltmeter

  • Ammeter

  • Tachometer

Explanation

Question 4 of 19

1

In a DC motor, what is the relationship between power power fietoa

Select one of the following:

  • Inversely proportional

  • Equal

  • None

  • Directly proportional

Explanation

Question 5 of 19

1

Which translates loss is due to resistances of the primary and secondary coil?

Select one of the following:

  • Copper losses

  • Stray losses

  • Iron losses

  • Mechanical losses

Explanation

Question 6 of 19

1

The motor without a centrifugal switch is

Select one of the following:

  • Capacitor start motor

  • Capacitor run motor

  • Capacitor start capacitor run motor

  • Split phase motor

Explanation

Question 7 of 19

1

In an AC motor, what is the relationship between power and power factor

Select one of the following:

  • None

  • Inversely proportional

  • Equal

  • Directly proportional

Explanation

Question 8 of 19

1

which of the following motors has no auxiliary winding?

Select one of the following:

  • Capacitor run motor

  • Capacitor start motor

  • Split phase motor

  • Repulsion motor

Explanation

Question 9 of 19

1

The brushes are made of

Select one of the following:

  • Copper

  • Carbon

  • Steel

  • Aluminim

Explanation

Question 10 of 19

1

The transformer winding insulated by:

Select one of the following:

  • Varnish

  • Wood

  • Plastic

  • Carbon

Explanation

Question 11 of 19

1

What material is used in the magnetic core of the transformer?

Select one of the following:

  • Copper

  • Varnish

  • Steel

  • Wood

Explanation

Question 12 of 19

1

Which of the following electrical parameters is not considered in DC motors?

Select one of the following:

  • Voltage

  • Power

  • Power factor

  • Current

Explanation

Question 13 of 19

1

Which of the following is not a method to control the speed of a DC motor?

Select one of the following:

  • Flux control method

  • Armature control method

  • Multiple voltage control

  • Winding turns control

Explanation

Question 14 of 19

1

Which of the following instruments in not used in electrica testing of a transformer?

Select one of the following:

  • Multi-meter

  • Tachometer

  • Voltmeter

  • Insulation tester

Explanation

Question 15 of 19

1

What DC motor is shown below?

Select one of the following:

  • Sepately excited

  • Long compound

  • Shunt

  • Series

Explanation

Question 16 of 19

1

What is the unit of torque, T?

Select one of the following:

  • Hertz

  • Watts

  • Newton-meter

  • Revolutions per minurt e

Explanation

Question 17 of 19

1

The losses due to the winding resistances in electrical machines is also known as:

Select one of the following:

  • Hysteresis

  • Eddy current loss

  • Friction loss

  • Copper loss

Explanation

Question 18 of 19

1

At what percent of the rated speed does the dentrifugal switch disconn e auxiliary winding?

Select one of the following:

  • 15%

  • 100%

  • 75%

  • 50%

Explanation

Question 19 of 19

1

Which of the following is not a type of DC motor?

Select one of the following:

  • Permanent magnet

  • Separately excited

  • Capacitor start

  • start

Explanation

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