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


bSemiclosed loop system


c Open system


dNone of the above


View Answer Closed loop system

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


aField controlled D.C. motor


bWard leonard control


cMetadyne


dStroboscope



In an open loop control system____________?


a Output is independent of control input


bOutput is dependent on control input


c Only system parameters have effect on the control output


dNone of the above



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


bPresence of non-linearities causes malfunctioning


cLess expensive


dGenerally free from problems of non-linearities



has tendency to oscillate______________?


aOpen loop system


bClosed loop system


cBoth A. and B.


d Neither A. nor B.


View Answer Closed loop system

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


aTransient response


b Error response


c Dynamic response


dEither of the above


View Answer Transient response

A good control system has all the following features except_____________?


a good stability


bslow response


cgood accuracy


d sufficient power handling capacity


View Answer slow response

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


astatic sensitivity


bdynamic deviation


clinearity


dprecision or accuracy


View Answer linearity

A multirangq instrument has________________?


amultiple shunt or series resistances inside the meter


bmulticoii arrangement


cvariable turns of coil


d any of the above



The principle on which vector voltmeter is based is_____________?


athat it works on the principle of complex variation


bthat it measures the response of linear ramp voltage


csame as digital meter


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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