Programmable Logic Controllers (PLCs) - JSS3 Basic technology Past Questions and Answers - page 1
1
What is a Programmable Logic Controller (PLC)?
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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
2
What is the primary function of a PLC?
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A
To cook food automatically
B
To control electromagnetic processes
C
To play video games
D
To manage social media accounts
3
Which programming language is commonly used in PLCs for creating control algorithms?
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A
Python
B
C++
C
Ladder Logic
D
HTML
4
What does ladder logic resemble?
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A
Mathematical equations
B
Electrical relay logic diagrams
C
Cooking recipes
D
Music notes
5
Which of the following is NOT a benefit of using PLCs in industrial automation?
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A
Improved efficiency
B
Flexibility in programming
C
Decreased reliability
D
Accuracy in control
6
What are function block diagrams (FBDs) used for in PLC programming?
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A
Creating graphical user interfaces
B
Writing text based algorithms
C
Simplifying complex control tasks
D
Sending emails
7
Which programming language provides a text-based approach similar to high-level programming languages?
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A
Ladder Logic
B
Function block diagrams (FBD)
C
Structured text (ST)
D
Assembly language
8
What do practical exercises with PLCs typically involve?
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A
Playing video games
B
Programming and operating PLCs
C
Writing novels
D
Painting pictures
9
Which component of a PLC converts electrical signals into physical action?
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A
Sensor
B
Actuator
C
Switch
D
Battery
10
What is PID control commonly used for in PLC applications?
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A
Temperature regulation
B
Playing music
C
Driving cars
D
Writing emails
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