Control System Quiz | Control System MCQs and Answers

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Questions
81 directly converts temperature into voltage.
A Thermocouple
B Potentiometer
C Gear train
D None of the above

Answer: Thermocouple
82 Which of the following can be measured by LVDT?
A Displacement
B Velocity
C Acceleration
D Any of the above

Answer: Any of the above
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83 An amplidyne can give which of the following characteristics ?
A Constant current
B Constant voltage
C Constant current as well as constant voltage
D Constant current, constant voltage and constant power

Answer: Constant current, constant voltage and constant power
84 With feed back _____ reduces.
A system stability
B system gain
C system stability and gain
D none of the above

Answer: system gain
85 In a control system integral error compensation _______ steady state error
A increases
B minimizes
C does not have any effect on
D any of the above

Answer: minimizes
86 If the gain of the critical damped system is increased it will behave as
A oscillatory
B critically damped
C overdamped
D underdamped

Answer: underdamped
87 A differentiator is usually not a part of a control system because it
A reduces damping
B reduces the gain margin
C increases input noise
D increases error

Answer: increases input noise
88 Which of the following is an electromagnetically device ?
A Induction relay
B Thermocouple
C LVDT
D Any of the above

Answer: LVDT
89 When the initial conditions of a system are specified to be zero it implies that the system is
A at rest without any energy stored in it
B working normally with reference input
C working normally with zero reference input
D at rest but stores energy

Answer: at rest but stores energy
90 can be extended to systems which are time-varying ?
A Bode-Nyquist stability methods
B Transfer functions
C Root locus design
D State model representatives

Answer: State model representatives
91 Which of the following is the non-linearity caused by servomotor ?
A Static friction
B Backlash
C Saturation
D None of the above

Answer: Saturation
92 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

Answer: lag at low frequencies and lead at high frequencies
93 technique gives quick transient and stability response
A Root locus
B Bode
C Nyquist
D Nichols

Answer: Root locus
94 The effect of error damping is to
A provide larger settling lime
B delay the response
C reduce steady state error
D none of the above

Answer: reduce steady state error
95 Which of the following devices is used for conversion of co-ordinates ?
A Microsyn
B Selsyn
C Synchro-resolver
D Synchro-transformer

Answer: Synchro-resolver
96 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

Answer: Differential bellows and straingauge
97 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

Answer: pressure signal to position change
98 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 changes from maximum to minimum
D None of the above

Answer: The range of measured variables through which the air output changes from maximum to minimum
99 Is not a final control element.
A Control valve
B Potentiometer
C Electropneumatic converter
D Servomotor

Answer: Potentiometer
100 Which of the following can be measured by the use of a tachogenerator ?
A Acceleration
B Speed
C Speed and acceleration
D Displacement

Answer: Speed

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