Hapter 1

Question 1

2 classifications for industrial control systems are

_______control and ______ control

Answer 1

They are classified by WHAt they control

Motion or Process

Question 2

List another name for each of the following terms

1. Motion Control
2. Process Control
3. Batch PRocess

Answer 2

Motion control- also called servos or servomechanism

Process Control- one or more variables are regulated during manufacturing and is monitored for changed from external factors and attempted to keep stable- also called…variable regulation

BAtch processing-also called sequential processing

Question 3

A closed loop industrial system typically uses

__________feedback

Answer 3

Negative feedback

Positive feedback is used in radios…if the signal is weak a AGC(automatic gain control) is activated to boost it

NEgative feedback is if the feedback signal opposes the input signal. Think of a heating system on a house

Question 4

List 2 examples of controlled variables for motion control and 2 examples of controlled variables for process control

Answer 4

Motion control-position and speed

Process control-temperature, pressure, flow rate

Question 5

List example of a measurement device for
Motion control
Process control

Answer 5

Motion control-Tachometer

Process control-thermometer

Question 6

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

A. Process
B. Motion

Answer 6

Process

Question 7

An open loop feedback system does not have

Answer 7

Feedback loop

Question 8

T or F

The measured variable represents the condition of the controlled variable

Answer 8

T

Question 9

The output of the measurement device is called

Answer 9

Feedback signal

Question 10

Define set point

Answer 10

A prescribed input value applied to the loop that indicates the desired condition of the controlled variable

Question 11

Difference between setpoint and feedback signal is referred to as the ______ signal and is produced by the ______ detector

Answer 11

Error

Error

Question 12

T OR F

THE controller can be considered th brain of a closed loop system

Answer 12

True

Question 13

Altering the _____ variable caused the condition of the _______ variable to change

Answer 13

Manipulated

Controlled

Question 14

The devices that provides the muscle to preform work in the closed loop system is referred to as the

Answer 14

Actuator

Question 15

The _____ is sent to the final control element

Answer 15

Error signal

Question 16

Which factors contribute to the dynamic response of a single control loop

Answer 16

All of the above

Question 17

T or F

The Manipur;Ted variable and controlled variable are synonyms terms in a closed loop system

Answer 17

False

Question 18

T o F

The basic concept of feedback control is that an error must exist before some corrective action can be made

Answer 18

T

Question 19

T or F

Feed forward control is seldom used except in combination with feedback control

Answer 19

T

Question 20

Which of the following conditions is compensated for by using feed forward control

Answer 20

Large magnitude disturbances

Question 21

The objective of ______control is to prevent the controlled variable from deviating form a setpoint

Answer 21

Feedback

Question 22

H

Answer 22

Measure valve

And n measurable