Electrical Engineering MCQs

Page No. 59

A.C. servomotor resembles_____________?


atwo phase induction motor

✓


bThree phase induction motor

✖


cdirect current series motor

✖


duniversal motor

✖



The output of a feedback control system must be a function of_________________?


areference and output

✓


b reference and input

✖


cinput and feedback signal

✖


doutput and feedback signal

✖


View Answer reference and output

Transfer function of a system is used to calculate which of the following ?


aThe order of the system

✖


bThe time constant

✖


c The output for any given input

✓


dThe steady state gain

✖



Zero initial condition for a system means_______________?


ainput reference signal is zero

✖


b. zero stored energy

✖


cne initial movement of moving parts

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d system is at rest and no energy is stored in any of its components

✓



As a result of introduction of negative feedback which of the following will not decrease ?


a Band width

✓


bOverall gain

✖


cDistortion

✖


dInstability

✖


View Answer Band width

decreases by the same amount as the gain decrease


aWard Leonard control

✖


bField controlled D.C. motor

✓


cStroboscope

✖


dMetadyne

✖



The band width, in a feedback amplifier_______________?


aremains unaffected

✖


bdecreases by the same amount as the gain increase

✖


c increases by the sane saaaajajt as the gain decrease

✓


ddecreases by the same amount as the gain decrease

✖



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


aVernistats

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bMicrosyns

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cResolvers

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d Any of the above

✓


View Answer Any of the above

By which of the following the control action is determined when a man walks along a path ?


aBrain

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bHands

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cLegs

✖


dEyes

✓


View Answer Eyes

Which of the following should be done to make an unstable system stable ?


aThe gain of the system should be decreased

✖


bThe gain of the system should be increased

✓


c The number of poles to the loop transfer function should be increased

✖


d The number of zeros to the loop transfer function should be increased

✖



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