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Free download in PDF Control System MCQs and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
81
directly converts temperature into voltage.
[A]
Thermocouple
[B]
Potentiometer
[C]
Gear train
[D]
None of the above
82
Which of the following can be measured by LVDT?
[A]
Displacement
[B]
Velocity
[C]
Acceleration
[D]
Any of the above
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
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
86
If the gain of the critical damped system is increased it will behave as
[A]
oscillatory
[B]
critically damped
[C]
overdamped
[D]
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
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
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
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
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
100
Which of the following can be measured by the use of a tachogenerator ?
[A]
Acceleration
[B]
Speed
[C]
Speed and acceleration
[D]
Displacement
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