6 Basic structure of a plc Quiz

What does PLC stand for in the context of automation?

• Programmable Logic Controller

• Personal Laptop Computer

• Public Limited Company

• Primary Learning Center

Which of the following is a function of a PLC?

• Controlling a machine or process

• Storing large amounts of data

• Providing internet access

• Generating electrical power

What is the primary function of a PLC in a process?

• To make a process more efficient and cost-effective

• To increase the complexity of a process

• To manually control a process

• To eliminate the need for input devices

What role does the PLC play in the cooling system of a power station?

• It opens the thermal switch.

• It senses the closed switch and sends a signal to a motorised valve.

• It directly cools the generator.

• It shuts down the generator.

What are the components of a PLC system?

• A computer microprocessor, programmable logic control software, and an interface card

• A computer microprocessor, a hard drive, and a monitor

• A keyboard, a mouse, and a printer

• A power supply, a fan, and a graphics card

Which component is responsible for processing in a PLC architecture?

• Output interface

• Processor

• Memory

• Input interface

How does a PLC make decisions?

• Based on random inputs

• Based on inputs and instructions from its memory

• By following a fixed sequence

• By manual control

Before PLCs, how were automated systems controlled?

• By physical hard-wired relay devices

• By wireless remote controls

• By digital interfaces

• By voice commands

What does Step 1 in the Ladder Logic Program instruct the PLC to do?

• Switch on the red lamp when the red button is pressed.

• Switch on the green lamp when the green button is pressed.

• Switch off the green lamp when the red button is pressed.

• Switch off the red lamp when the green button is pressed.

What action is performed in Step 2 of the Ladder Logic Program?

• Switch on the green lamp when the green button is pressed.

• Switch off the red lamp when the red button is pressed.

• Switch on the red lamp when the red button is pressed.

• Switch off the green lamp when the green button is pressed.