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Free download in PDF PID Controller Multiple Choice 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.
(1)
The derivative control action is typically used when controlling, but rarely used when controlling.
[A]
Temperature, Flow
[B]
Flow, Level
[C]
pH, Temperature
[D]
Level, Temperature
Answer: Temperature, Flow
(2)
processes always require some degree of control action to achieve setpoint.
[A]
Runaway, Linear
[B]
Self-regulating, Integral
[C]
Integrating, Derivative
[D]
Self-regulating, Proportional
Answer: Self-regulating, Integral
(3)
PID controller is also known as
[A]
three term controller
[B]
proportional controller
[C]
two term controller
[D]
four term controller
Answer: three term controller
(4)
A bilinear transformation that converts transfer functions from continuous to sampled and vice versa is called
[A]
similarity transformation
[B]
Tustin transformation
[C]
Laplace transformation
[D]
integral transformation
Answer: Tustin transformation
(5)
A system that is a portion of larger system is called
[A]
primary system
[B]
partition
[C]
subsystem
[D]
singular system
(6)
A state space representation in which each state equation is a function of only one state variable is called
[A]
decoupled system
[B]
open loop system
[C]
feedback system
[D]
coupled system
(7)
A filter that passes most frequencies unaltered, but attenuates those in a specific range to very low levels is called
[A]
band stop filter
[B]
band loop filter
[C]
band start filter
[D]
zero band filter
(8)
In a PID controller, the overshoots has increased. The derivative time constant has to be __ so as to reduce the overshoots:
[A]
Reduced to zero
[B]
Increased
[C]
Reduced
[D]
None of the above
(9)
In a PID controller, the offset has increased. The integral time constant has to be ___ so as to reduce offset:
[A]
Increased
[B]
Reduced
[C]
Reduced to zero
[D]
None of the above
(10)
Which of the following system provides excellent transient and steady state response:
[A]
Proportional + Differential action
[B]
Proportional + Integral + Differential action
[C]
Proportional action
[D]
Proportional + Integral action
Answer: Proportional + Integral + Differential action
(11)
The number of operational amplifiers require for designing of electronic PID controller is:
(12)
When derivative action is included in a proportional controller, the proportional band:
[A]
Remains unchanged
[B]
Increases
[C]
Reduces
[D]
None of the above
Answer: Remains unchanged
(13)
In a proportional temperature controller, if the quantity under the heater increases the offset will:
[A]
Increase
[B]
Reduce
[C]
Remain uneffected
[D]
None of the above
(14)
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
(15)
The term reset control refers to:
[A]
Integral
[B]
Derivative
[C]
Proportional
[D]
None of the above
(16)
Proportional band of the controller is expressed as:
[A]
Percentage
[B]
Range of control variables
[C]
Gain
[D]
Ratio
(17)
Proportional band of a controller is defined as the range of:
[A]
Measured variables through which the air output varies from maximum to minimum
[B]
Air output as the measured variable varies from maximum to minimum
[C]
Measured variable to the set variable
[D]
None of the above
Answer: Measured variables through which the air output varies from maximum to minimum
(18)
Rate compensation :
[A]
Increases damping factor
[B]
Second order
[C]
Increases bandwidth
[D]
Attenuation
Answer: Increases damping factor
(19)
Lag-lead compensation is a:
[A]
Increases damping factor
[B]
Second order
[C]
Attenuation
[D]
Increases bandwidth
(20)
Lead compensation leads to:
[A]
Increases bandwidth
[B]
Attenuation
[C]
Increases damping factor
[D]
Second order
Answer: Increases bandwidth
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