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Control Systems

Study 100 Electrical Engineering MCQs with correct answers and explanations.

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91Electrical EngineeringMedium

A phase lag lead network introduces in the output________?

Alag at all frequencies

Bnone of the above

Clag at low frequencies and lead at high frequencies

Dlag at high frequencies and lead at low frequencies

Correct answer

C. lag at low frequencies and lead at high frequencies

Explanation

The correct answer is lag at low frequencies and lead at high frequencies.

92Electrical EngineeringMedium

In an open loop control system________?

AOutput is independent of control input

BOnly system parameters have effect on the control output

CNone of the above

DOutput is dependent on control input

Correct answer

A. Output is independent of control input

Explanation

The correct answer is Output is independent of control input.

93Electrical EngineeringMedium

A car is raining at a constant speed of 50 km/h, which of the following is the feedback element for the driver?

ANone of the above

BEyes

CClutch

DNeedle of the speedometer

ESteering wheel

Correct answer

D. Needle of the speedometer

Explanation

The correct answer is Needle of the speedometer.

94Electrical EngineeringMedium

With feed back ________ reduces?

Asystem gain

Bsystem stability

Cnone of the above

Dsystem stability and gain

Correct answer

A. system gain

Explanation

The correct answer is system gain.

95Electrical EngineeringMedium

The frequency and time domain are related through which of the following?

ALaplace Transform and Fourier Integral

BEither B. or C.

CLaplace Transform

DFourier Integral

Correct answer

A. Laplace Transform and Fourier Integral

Explanation

The correct answer is Laplace Transform and Fourier Integral.

96Electrical EngineeringMedium

With feedback ________ increases?

Asystem stability

Beffects of disturbing signals

Csensitivity

Dgain

Correct answer

A. system stability

Explanation

The correct answer is system stability.

97Electrical EngineeringMedium

In electrical-pneumatic system analogy the current is considered analogous to________?

Aair flow rate

Bair flow

Cpressure

Dvelocity

Correct answer

A. air flow rate

Explanation

The correct answer is air flow rate.

98Electrical EngineeringMedium

________directly converts temperature into voltage?

AThermocouple

BLVDT

CNone of the above

DPotentiometer

EGear train

Correct answer

A. Thermocouple

Explanation

The correct answer is Thermocouple.

99Electrical EngineeringMedium

In a control system integral error compensation ________ steady state error?

Aincreases

Bdoes not have any effect on

Cany of the above

Dminimizes

Correct answer

D. minimizes

Explanation

The correct answer is minimizes.

100Electrical EngineeringMedium

Which of the following devices are commonly used as error detectors in instruments?

AResolvers

BVernistats

CAny of the above

DMicrosyns

Correct answer

C. Any of the above

Explanation

The correct answer is Any of the above.

A phase lag lead network introduces in the output________?

Alag at all frequencies

Bnone of the above

Clag at low frequencies and lead at high frequencies

Dlag at high frequencies and lead at low frequencies

Correct answer

C. lag at low frequencies and lead at high frequencies

Explanation

The correct answer is lag at low frequencies and lead at high frequencies.