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


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


bMicrosyns


cResolvers


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


bHands


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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