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All Electrical Engineering MCQs

Study 3,658 Electrical Engineering MCQs with correct answers and explanations.

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2291Electrical EngineeringMedium

In a shell and tube surface condenser________?

Aall of the above varying with situation

Bsteam and cooling water mix to give the condensate

Ccooling water passes through the tubes and steam surrounds them

Dsteam passes through the cooling tubes and cooling water surrounds them

Correct answer

C. cooling water passes through the tubes and steam surrounds them

Explanation

The correct answer is cooling water passes through the tubes and steam surrounds them.

2292Electrical EngineeringMedium

The armature current of the synchronous motor has higher values for________?

Anone of the above

Bboth A. and (b)

Clow excitation only

Dhigh excitation only

Correct answer

B. both A. and (b)

Explanation

The correct answer is both A. and (b).

2293Electrical EngineeringMedium

Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction?

ATap changing control of transformer

BReduced current method

CSeries parallel operation of motors

DAll of the above

Correct answer

A. Tap changing control of transformer

Explanation

The correct answer is Tap changing control of transformer.

2294Electrical EngineeringMedium

The winding where dummy coils are used is sometimes called________?

Aduplex winding

Bforced winding

Cnone of the above

Dtriplex winding

Correct answer

B. forced winding

Explanation

The correct answer is forced winding.

2295Electrical EngineeringMedium

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

Athe motor will consume less power

Bmotor will run in reverse direction

Cmotor will continue to run in same direction

Dtorque will increase

Correct answer

C. motor will continue to run in same direction

Explanation

The correct answer is motor will continue to run in same direction.

2296Electrical EngineeringMedium

The superposition theorem requires as many circuits to be solved as there are________?

Asources and nodes

Bnodes

Csources, nodes and meshes

Dsources

Correct answer

D. sources

Explanation

The correct answer is sources.

2297Electrical EngineeringMedium

A galvanometer in series with a high resistance is called________?

AA wattmeter

BNone of the above

CAn ammeter

DA voltmeter

Correct answer

D. A voltmeter

Explanation

The correct answer is A voltmeter.

2298Electrical EngineeringMedium

The relative permeability is less than unity is case of________?

Adiamagnetic materials

Bferrites

Cnon-ferrous materials

Dferromagnetic materials

Correct answer

A. diamagnetic materials

Explanation

The correct answer is diamagnetic materials.

2299Electrical EngineeringMedium

The voltage drop for which of the following types of brush can be expected to be least?

AMetal graphite brushes

BGraphite brushes

CCarbon brushes

DNone of the above

Correct answer

A. Metal graphite brushes

Explanation

The correct answer is Metal graphite brushes.

2300Electrical EngineeringMedium

Commonly used instruments in power system measurement are________?

Amoving coil or iron

Brectifier

Celectrostatic

Dinduction

Correct answer

D. induction

Explanation

The correct answer is induction.

In a shell and tube surface condenser________?

Aall of the above varying with situation

Bsteam and cooling water mix to give the condensate

Ccooling water passes through the tubes and steam surrounds them

Dsteam passes through the cooling tubes and cooling water surrounds them

Correct answer

C. cooling water passes through the tubes and steam surrounds them

Explanation

The correct answer is cooling water passes through the tubes and steam surrounds them.