Controller Performance
Controller Performance
Solved Example: 9151-01
Slow response of an over-damped system can be made faster with the help of ______ controller. (DFCCIL Exec S and T 2018)
A. PD
B. P
C. PI
D. Remote
Correct Answer: B
Solved Example: 9151-02
A proportional plus derivative controller:
- Has high sensitivity.
- Increases the stability of the system.
- Improves steady-state accuracy.
Which of the above statements are correct?
(ESE Electronics 2014 Paper II)A. 1, 2, and 3
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only
Correct Answer: B
Solved Example: 9151-03
The electric switch to control any electrical equipment will act as a: (UPPCL JE Nov 2019 Shift I)
A. PD controller
B. Proportional controller
C. PID controller
D. ON/OFF controller
Correct Answer: D
Solved Example: 9151-04
What effect does the proportional parameter of control response have on the rise time in a closed-loop control system? (PGCIL DT Elec Aug 2021 NR I)
A. It decreases
B. It eliminates
C. No changes
D. It increases
Correct Answer: A
Solved Example: 9151-05
A condition where integral control drives the output of a controller into saturation is called: (DFCCIL Exec S and T 2018)
A. Wind-Up
B. Noise
C. Repeat
D. Offset
Correct Answer: A
Solved Example: 9151-06
The controller which is highly sensitive to noise is: (ESE Electronics 2016 Paper II)
A. PI
B. PD
C. Both PI and PD
D. Neither PI nor PD
Correct Answer: B
Solved Example: 9151-07
Which of these statements is correct about proportional plus derivative controller? (UPRVUNL AE EC 2014)
A. It decreases the stability of the system
B. It has high sensitivity
C. It improves the steady-state accuracy
D. The derivative constant is expressed in units of hours
Correct Answer: B
Solved Example: 9151-08
In a closed-loop process control system with a PID controller, _________ response depends only on the difference between set point and the process variable. (ISRO IPRC Tech Asst Mech Apr 2018)
A. Proportional
B. Integral
C. Differential
D. All of these
Correct Answer: D
Solved Example: 9151-09
The effect of integral controller on the steady state error (e$_{ss}$) and on the relative stability (R$_s$) of the system are: (ESE Electronics 2012 Paper II)
A. Both are increased
B. e$_{ss}$ is increased but R$_s$ is reduced
C. e$_{ss}$ is reduced but R$_s$ is increased
D. Both are reduced
Correct Answer: D