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Free download in PDF PID Controller Objective Type Questions 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.
(21)
Lag compensation leads to:
[A]
Attenuation
[B]
Second order
[C]
Increases damping factor
[D]
Increases bandwidth
(22)
Derivative error compensation:
[A]
Improvement in transient response
[B]
Reduction in steady state error
[C]
Reduction is settling time
[D]
Increase in damping constant
Answer: Reduction in steady state error
(23)
Derivative output compensation:
[A]
Reduction is settling time
[B]
Increase in damping constant
[C]
Improvement in transient response
[D]
Reduction in steady state error
Answer: Reduction is settling time
(24)
Addition of zero at origin:
[A]
Increase in damping constant
[B]
Reduction in steady state error
[C]
Improvement in transient response
[D]
Reduction is settling time
Answer: Improvement in transient response
(25)
Phase lag controller:
[A]
Reduction in steady state error
[B]
Increase in damping constant
[C]
Improvement in transient response
[D]
Reduction is settling time
Answer: Reduction in steady state error
(26)
The input of a controller is
[A]
Error signal
[B]
Signal of fixed amplitude not dependent on desired variable value
[C]
Desired variable value
[D]
Sensed signal
(27)
Process variable filtering should be used:
[A]
to dampen noise
[B]
only on integrating processes
[C]
to improve response time
[D]
only on self-regulating processes
(28)
Fast, self-regulating processes typically respond well to aggressive control action.
[A]
Reset
[B]
Gain
[C]
Nonlinear
[D]
Proportional
(29)
A condition where integral control action drives the output of a controller into saturation is called:
[A]
wind-up
[B]
repeat
[C]
self-bias
[D]
noise
(30)
A proportional band setting of 175% is equivalent to a gain setting of .
[A]
1.32
[B]
0.571
[C]
175
[D]
1.75
31
Reset control action is often expressed in units of:
[A]
time constant ratio (unitless)
[B]
repeats per minute
[C]
percent
[D]
minutes
Answer: repeats per minute
32
“Quarter-wave damping” may be described as:
[A]
a condition of good control where oscillations quickly subside
[B]
a condition of excellent control where there are no oscillations
[C]
a condition of good control where PV approaches SP without overshoot
[D]
a condition of poor control where the transmitter is damped by 25%
Answer: a condition of good control where oscillations quickly subside
33
The reciprocal of proportional band is called:
[A]
Gain
[B]
Minutes per repeat
[C]
Percent
[D]
None of the above
34
The integral control:
[A]
Decreases the damping coefficient
[B]
Increases the steady state error
[C]
Increases the noise and stability
[D]
Decreases the steady state error
Answer: Increases the steady state error
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