Study mode · no timer

All Electrical Engineering MCQs

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

Answers and explanations are always visible Take this quiz

2041Electrical EngineeringMedium

If the power and current gains of a transistor amplifier are 16500 and 100 respectively, then voltage gain is________?

A165 x 104

B100

C165

DNone of the above

Correct answer

C. 165

Explanation

The correct answer is 165.

2042Electrical EngineeringMedium

Due to which of the following reasons aluminium does not corrode in atmosphere?

AAtmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium

BNo reaction with oxygen occurs ft Any of the above

CAluminium is a noble metal

Correct answer

A. Atmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium

Explanation

The correct answer is Atmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium.

2043Electrical EngineeringMedium

The best indication about the state of charge on a lead-acid battery is given by________?

Aspecific gravity of electrolyte

Btemperature of electrolyte

Coutput voltage

Dnone of the above

Correct answer

A. specific gravity of electrolyte

Explanation

The correct answer is specific gravity of electrolyte.

2044Electrical EngineeringMedium

The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as________?

Anone of the above

Bpull-up torque

Cpull-out torque

Dpull-in torque

Correct answer

D. pull-in torque

Explanation

The correct answer is pull-in torque.

2045Electrical EngineeringMedium

The values of h parameter of a transistor in CE arrangement are ________ arrangement?

AThe same as for CC

BThe same as for CB

CDifferent from that in CB

DNone of the above

Correct answer

C. Different from that in CB

Explanation

The correct answer is Different from that in CB.

2046Electrical EngineeringMedium

The bearings used to support the rotor shafts are generally________?

Aneedle bearings

Bmagnetic bearmgs

Cball bearings

Dbush bearings

Correct answer

C. ball bearings

Explanation

The correct answer is ball bearings.

2047Electrical EngineeringMedium

Which of the following is most difficult to fabricate in an IC?

ATransistor

BFET

CCapacitor

DDiode

Correct answer

C. Capacitor

Explanation

The correct answer is Capacitor.

2048Electrical EngineeringMedium

Which of the following quantities consists of SI unit as WATT?

ACharge

BPower

CForce

DCurrent

Correct answer

B. Power

Explanation

The SI unit of power is the watt and it is discover by the Scottish Engineer James Watt. Power is the rate of consumption of electric energy. So, it is equivalent to joules per second.

2049Electrical EngineeringMedium

In the SPWM, the modulating signal is________?

ASquare

BTriangular

CSinusoidal

DSaw – tooth

Correct answer

C. Sinusoidal

Explanation

The correct answer is Sinusoidal.

2050Electrical EngineeringMedium

On overcharging a battery________?

Ait will raise the specific gravity of the electrolyte

Bit will bring about chemical change in active materials

Cit will increase the capacity of the battery

Dnone of the above will occur

Correct answer

D. none of the above will occur

Explanation

The correct answer is none of the above will occur.

Due to which of the following reasons aluminium does not corrode in atmosphere?

AAtmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium

BNo reaction with oxygen occurs ft Any of the above

CAluminium is a noble metal

Correct answer

A. Atmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium

Explanation

The correct answer is Atmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium.