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All Electrical Engineering MCQs

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

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2381Electrical EngineeringMedium

High voltage transmission lines use________?

Aboth A. and B.

Bnone of the above

Cpin insulators

Dsuspension insulators

Correct answer

D. suspension insulators

Explanation

The correct answer is suspension insulators.

2382Electrical EngineeringMedium

The purpose of providing an iron core in a transformer is to________?

Aprovide support to windings

Bdecrease the reluctance of the magnetic path

Creduce hysteresis loss

Dreduce eddy current losses

Correct answer

B. decrease the reluctance of the magnetic path

Explanation

The correct answer is decrease the reluctance of the magnetic path.

2383Electrical EngineeringMedium

In closed loop control system, with positive value of feedback gain the overall gain of the system will________?

Aany of the above

Bincrease

Cbe unaffected

Ddecrease

Correct answer

D. decrease

Explanation

The correct answer is decrease.

2384Electrical EngineeringMedium

Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ________ input signal?

Avelocity

Bposition

Call of the above

Dacceleration

Correct answer

C. all of the above

Explanation

The correct answer is all of the above.

2385Electrical EngineeringMedium

________has the least value of starting torque to full load torque ratio?

AD.C. shunt motor

BD.C. series motor

CSlip ring induction motor

DSquirrel cage induction motor

Correct answer

D. Squirrel cage induction motor

Explanation

The correct answer is Squirrel cage induction motor.

2386Electrical EngineeringMedium

Co-efficient of adhesion is________-?

Alow in case of D.C. traction than in the case of AC. traction

Bequal in both AC. and D.C. traction

Cany of the above

Dhigh in case of D.C. traction than in the case of AC. traction

Correct answer

A. low in case of D.C. traction than in the case of AC. traction

Explanation

The correct answer is low in case of D.C. traction than in the case of AC. traction.

2387Electrical EngineeringMedium

A transistor behaves as a linear device for ________?

ASmall signals only

BBoth small and large signals

CNone of the above

DLarge signals only

Correct answer

A. Small signals only

Explanation

The correct answer is Small signals only.

2388Electrical EngineeringMedium

Which of the following methods does not take into account the maximum temperature rise under variable load conditions?

AEquivalent torque method

BEquivalent current method

CMethod of average losses

DEquivalent power method

Correct answer

C. Method of average losses

Explanation

The correct answer is Method of average losses.

2389Electrical EngineeringMedium

The frequency response of transformer coupling is________?

AExcellent

BGood

CVery good

DPoor

Correct answer

D. Poor

Explanation

The correct answer is Poor.

2390Electrical EngineeringMedium

Which of the following rectifiers have been used extensively in supplying direct current for electroplating?

AMercury arc rectifiers

BNone of the above

CSelenium rectifiers

DCopper oxide rectifiers

EMechanical rectifiers

Correct answer

C. Selenium rectifiers

Explanation

The correct answer is Selenium rectifiers.

Co-efficient of adhesion is________-?

Alow in case of D.C. traction than in the case of AC. traction

Bequal in both AC. and D.C. traction

Cany of the above

Dhigh in case of D.C. traction than in the case of AC. traction

Correct answer

A. low in case of D.C. traction than in the case of AC. traction

Explanation

The correct answer is low in case of D.C. traction than in the case of AC. traction.