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 test

221Electrical EngineeringMedium

The cooling section in the surface condenser________?

Areduces the quantity of vapour extracted along with air

Bdoes not affect vapour quantity extracted but reduces pump capacity of air extraction pump

Cincreases the quantity of vapour extracted along with air

Dnone of the above

Correct answer

A. reduces the quantity of vapour extracted along with air

Explanation

The correct answer is reduces the quantity of vapour extracted along with air.

222Electrical EngineeringMedium

For which of the following ‘ampere second’ could be the unit?

ACharge

BReluctance

CPower

DEnergy

Correct answer

A. Charge

Explanation

The correct answer is Charge.

223Electrical EngineeringMedium

Which of the following is the most likely source of harmonics in a transformer?

ACore saturation

Bloose connections

Cpoor insulation

DOverload

Correct answer

A. Core saturation

Explanation

The correct answer is Core saturation.

224Electrical EngineeringMedium

D.C. windings are________?

Aalways 2-layer type

Bnone of the above

Cnever 2-layer type

Dsometimes 2-layer type

Correct answer

A. always 2-layer type

Explanation

The correct answer is always 2-layer type.

225Electrical EngineeringMedium

Reciprocal of permeability is________?

Apermittivity

Bconductance

Csusceptibility

Dreluctivity

Correct answer

D. reluctivity

Explanation

The correct answer is reluctivity.

226Electrical EngineeringMedium

Change of D.C. excitation of a synchronous motor changes:

Apower factor of power drawn by the motor

Ball of the these

Capplied voltage of the motor

Dnone of the these

Emotor speed

Correct answer

A. power factor of power drawn by the motor

Explanation

The correct answer is power factor of power drawn by the motor.

227Electrical EngineeringMedium

Which of the following is a vector quantity?

AMagnetic potential

BRelative permeability

CMagnetic field intensity

DFlux density

Correct answer

C. Magnetic field intensity

Explanation

The correct answer is Magnetic field intensity.

228Electrical EngineeringMedium

A parallel resonant band-pass filter consists of a 6.8 Ω resistor in series with a parallel network made up of an 8 µH coil and a 120 pF capacitor. The output is taken across the capacitor/coil. Assume RW = 0 Ω. What is the center frequency of the filter?

A514 kHz

B5.03 MHz

C503 kHz

D5.14 MHz

Correct answer

D. 5.14 MHz

Explanation

The correct answer is 5.14 MHz.

229Electrical EngineeringMedium

Less maintenance troubles are experienced in case of________?

Aboth A. and (b)

Bsquirrel cage induction motor

Cslip ring induction motor

Dnone of the above

Correct answer

B. squirrel cage induction motor

Explanation

The correct answer is squirrel cage induction motor.

230Electrical EngineeringMedium

In single phase VSI, the harmonic which is not present is________?

A3rd

B5th

C7th

D2nd

Correct answer

D. 2nd

Explanation

The correct answer is 2nd.

The cooling section in the surface condenser________?

Areduces the quantity of vapour extracted along with air

Bdoes not affect vapour quantity extracted but reduces pump capacity of air extraction pump

Cincreases the quantity of vapour extracted along with air

Dnone of the above

Correct answer

A. reduces the quantity of vapour extracted along with air

Explanation

The correct answer is reduces the quantity of vapour extracted along with air.