Electrical Engineering MCQs

Page No. 61

A control system in which the control action is somehow dependent on the output is known as____________?


aClosed loop system

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bSemiclosed loop system

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c Open system

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dNone of the above

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View Answer Closed loop system

Which of the following is an open loop control system ? 0


aField controlled D.C. motor

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bWard leonard control

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cMetadyne

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dStroboscope

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In an open loop control system____________?


a Output is independent of control input

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bOutput is dependent on control input

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c Only system parameters have effect on the control output

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dNone of the above

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Which of the following statements is not necessarily correct for open control system


aA. Input command is the sole factor responsible for providing the control action

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bPresence of non-linearities causes malfunctioning

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cLess expensive

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dGenerally free from problems of non-linearities

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has tendency to oscillate______________?


aOpen loop system

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bClosed loop system

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cBoth A. and B.

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d Neither A. nor B.

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View Answer Closed loop system

The initial response when tne output is not equal to input is called_____________? 0


aTransient response

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b Error response

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c Dynamic response

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dEither of the above

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View Answer Transient response

A good control system has all the following features except_____________?


a good stability

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bslow response

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cgood accuracy

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d sufficient power handling capacity

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View Answer slow response

The ratio of maximum displacement deviation to full scale deviation of the instrument is called_______________?


astatic sensitivity

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bdynamic deviation

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clinearity

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dprecision or accuracy

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View Answer linearity

A multirangq instrument has________________?


amultiple shunt or series resistances inside the meter

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bmulticoii arrangement

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cvariable turns of coil

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d any of the above

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The principle on which vector voltmeter is based is_____________?


athat it works on the principle of complex variation

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bthat it measures the response of linear ramp voltage

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csame as digital meter

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d that it measures the amplitude of a single at two points and at the same time measures their phase difference

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