Free SACA Programmable Logic Controllers Questions and Answers

Question 1

What is the primary function of a Programmable Logic Controller (PLC) in an industrial automation system?

Accepted Answer

To monitor and control industrial processes

Answer

To provide power to machinery

Answer

To display information to operators

Answer

To store large amounts of data

Question 2

Which programming language is most commonly used for programming PLCs?

Accepted Answer

Ladder Logic

Answer

Python

Answer

Java

Answer

C++

Question 3

In a PLC, what does the term "I/O" stand for?

Accepted Answer

Input/Output

Answer

Internal/Operational

Answer

Initialization/Override

Answer

Interface/Organization

Question 4

What is the purpose of a relay output module in a PLC system?

Accepted Answer

To physically switch external devices on and off

Answer

To process data and control internal operations

Answer

To interface the PLC with other digital devices

Answer

To provide visual feedback to operators

Question 5

In a PLC system, what is the function of a timer?

Accepted Answer

To delay actions for a specified period

Answer

To measure the temperature of a process

Answer

To count the number of operations performed

Answer

To control the speed of a motor