Chapter 1

Question 1

The two classifications of industrial control systems

Answer 1

Motion control and process control

Question 2

A closed-loop industrial system uses

Answer 2

Negative feedback

Question 3

The control method used in ______ control applications is to sustain a constant condition of the controlled variable

Answer 3

Process

Question 4

An open-loop system does not have a

Answer 4

Feedback loop

Question 5

The manipulated variable and controlled variable are synonymous terms T/F

Answer 5

False

Question 6

The output of the measurement device

Answer 6

Feedback signal

Question 7

The difference between the setpoint and feedback signal is

Answer 7

Error signal - error detector

Question 8

Altering the ______ variable cause the _____ variable to change

Answer 8

Manipulated - controlled

Question 9

The device that provides muscle to perform work

Answer 9

Actuator

Question 10

Is sent to the final control element

Answer 10

Control signal

Question 11

Which of the following factors contributes to the dynamic response of a single control loop

Answer 11

D) all the above

Question 12

What is the controlled variable in this process

Answer 12

Gas pressure

Question 13

What is the manipulated variable in this process

Answer 13

Steam flow

Question 14

What is the setpoint

Answer 14

325 psi

Question 15

What is the measured variable

Answer 15

Pressure

Question 16

The objective of _____ control is to prevent the controlled variable from deviating from the setpoint

Answer 16

Feed-forward

Question 17

When feedback and feed-forward control are performed together, the primary function of feed-forward is to make connections for _____ disturbances and feedback control to make corrections for _____ disturbances

Answer 17

A) measurable then (B) unmeasurable

Question 18

Which of the following influences causes a controlled variable to change

Answer 18

All the above