Free ETO Automation & Control Systems Questions and Answers

Question 1

What is the purpose of a Programmable Logic Controller (PLC) in automation?

Accepted Answer

To automatically control machinery

Answer

To manually operate machinery

Answer

To measure electrical power

Answer

To generate electricity

Question 2

Which device is used to convert analog signals to digital in control systems?

Accepted Answer

Analog-to-Digital Converter

Answer

Digital-to-Analog Converter

Answer

Transducer

Answer

Relay

Question 3

What is a sensor’s role in an automated control system?

Accepted Answer

To detect conditions and provide feedback

Answer

To perform calculations

Answer

To amplify signals

Answer

To store data

Question 4

Which control system type uses feedback to maintain desired output?

Accepted Answer

Closed-loop control system

Answer

Open-loop control system

Answer

Manual control system

Answer

Digital control system

Question 5

What is the function of an actuator in automation?

Accepted Answer

To convert signals to motion

Answer

To measure voltage

Answer

To detect temperature

Answer

To store energy

Question 6

Which protocol is commonly used for communication in industrial automation?

Accepted Answer

Modbus

Answer

HTTP

Answer

FTP

Answer

SMTP

Question 7

What is 'hysteresis' in control systems?

Accepted Answer

Lag between input and output

Answer

Instantaneous response

Answer

Control signal amplification

Answer

Signal distortion

Question 8

Which type of logic uses binary signals for decision making?

Accepted Answer

Boolean logic

Answer

Fuzzy logic

Answer

Analog logic

Answer

Linear logic

Question 9

What does a Human-Machine Interface (HMI) allow operators to do?

Accepted Answer

Interact with control systems

Answer

Perform physical repairs

Answer

Monitor power consumption only

Answer

Control electrical wiring