PLC Overview

Question 1

Remote I/O Unit Components consist of:

Accepted Answer

Input and Output Modules, A Power Source, A communication device, All of these

Question 2

PLC is flexible because it allows production changes by modifying the

Accepted Answer

software

Question 3

The difference between a Programmable Logic Controller and a computer is that the PLC is

Accepted Answer

designed to operate in the industrial environment

Question 4

One of the main advantages of the PLC is that the system can be modified

Accepted Answer

without having to disconnect or re-route a single wire

Question 5

Which one of the following PLC components allows easy expansion of the basic system?

Accepted Answer

Input/Output unit

Question 6

The CPU and I/O sections are separated to protect the CPU from

Accepted Answer

noise interference

Question 7

Which one of the following statements concerning the PLC is incorrect?

Accepted Answer

It is designed to operate in the air-conditioned workshop

Question 8

How could the programs stored in the permanent memory of EPROM be erased?

Accepted Answer

By exposing it to ultra-violet light

Question 9

Which one of the following components is an output device of the PLC?

Accepted Answer

Solenoid

Question 10

To control an electro-pneumatic circuit using a PLC, one should connect the

Accepted Answer

I/O devices to the I/O terminals of the PLC

Question 11

To say a memory is volatile means that

Accepted Answer

removing power erases the memory

Question 12

The size of a PLC is determined by its number of

Accepted Answer

I/Os and memory capacity

Questions 12