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Programmable Logic Controllers (PLCs) - JSS3 Basic technology Past Questions and Answers - page 1

1

What is a Programmable Logic Controller (PLC)?

A

A type of computer used for word processing

B

A device used to control industrial processes

C

A tool for editing photos and videos

D

A device for playing music

correct option: b
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2

What is the primary function of a PLC?

A

To cook food automatically

B

To control electromagnetic processes

C

To play video games

D

To manage social media accounts

correct option: b
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3

Which programming language is commonly used in PLCs for creating control algorithms?

A

Python

B

C++

C

Ladder Logic

D

HTML

correct option: c
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4

What does ladder logic resemble?

A

Mathematical equations

B

Electrical relay logic diagrams

C

Cooking recipes

D

Music notes

correct option: b
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5

Which of the following is NOT a benefit of using PLCs in industrial automation?

A

Improved efficiency

B

Flexibility in programming

C

Decreased reliability

D

Accuracy in control

correct option: c
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6

What are function block diagrams (FBDs) used for in PLC programming?

A

Creating graphical user interfaces

B

Writing text based algorithms

C

Simplifying complex control tasks

D

Sending emails

correct option: d
Users' Answers & Comments
7

Which programming language provides a text-based approach similar to high-level programming languages?

A

Ladder Logic

B

Function block diagrams (FBD)

C

Structured text (ST)

D

Assembly language

correct option: c
Users' Answers & Comments
8

What do practical exercises with PLCs typically involve?

A

Playing video games

B

Programming and operating PLCs

C

Writing novels

D

Painting pictures

correct option: b
Users' Answers & Comments
9

Which component of a PLC converts electrical signals into physical action?

A

Sensor

B

Actuator

C

Switch

D

Battery

correct option: b
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10

What is PID control commonly used for in PLC applications?

A

Temperature regulation

B

Playing music

C

Driving cars

D

Writing emails

correct option: a
Users' Answers & Comments
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