100 TOP Control Systems Multiple choice Questions and Answers pdf

81.    In a stable control system saturation can cause which of the following ?
(a)     Low-level oscillations
(b)     High-level oscillations
(c)     Conditional stability
(d)     Overdamping
Ans: a

82.    Which of the following can be measured by the use of a tacho-generator ?
(a)     Acceleration  
(b)     Speed
(c)    Speed and acceleration
(d)    Displacement
(e)    None of the above
Ans: b

83    is not a final control element.
(a)     Control valve
(b)     Potentiometer
(c)    Electro-pneumatic converter
(d)    Servomotor
Ans: b

84. Which of the following is the definition of proportional band of a controller ?
(a)     The range of air output as measured variable varies from maximum to minimum
(b)     The range of measured variables from set value
(c)    The range of measured variables through which the air output chan¬ges from maximum to minimum
(d)    Any of the above
(e)    None of the above
Ans: c

85.    In pneumatic control systems the control valve used as final control element converts 
(a)    pressure signal to electric signal
(b)    pressure signal to position change
(c)    electric signal to pressure signal
(d)    position change to pressure signal
(e)    none of the above
Ans: b

86.    Pressure error can be measured by which of the following ?
(a)     Differential bellows and straingauge
(b)     Selsyn
(c)     Strain gauge
(d)     Strain gauge and potentiometer
Ans: a

87.    Which of the following devices is used for conversion of co-ordinates ?
(a)     Microsyn
(b)     Selsyn
(c)    Synchro-resolver
(d)    Synchro-transformer
Ans: c

88.   The effect of error damping is to
(a)    provide larger settling lime
(b)    delay the response
(c)    reduce steady state error
(d)    any of the above
(e)    none of the above
Ans: c

89    technique gives quick transient and stability response
(a)     Root locus
(b)     Bode
(c)     Nyquist
(d)     Nichols
Ans: a

90. A phase lag lead network introduces in the output
(a)     lag at all frequencies
(b)     lag at high frequencies and lead at low frequencies
(c)     lag at low frequencies and lead at high frequencies
(d)     none of the above
Ans: c

Read More Questions:
Control Systems MCQs Part1
Control Systems MCQs Part2

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