Basic Instrumentation Ch 12

Question 1

Most PLCs have five common building blocks that originate from relay logic in control circuits?

a) true
b) false

Answer 1

a) true

Question 2

To identify the location of terminal points, modules, and modular assemblies, a method of addressing or locating these devices is needed in a digital identification system, what is used to locate devices?

Answer 2

binary numbers

Question 3

What is 10 in binary?

Answer 3

1010

Question 4

One of the largest manufacturers of PLCs in the US

Answer 4

Allen-Bradley

Question 5

Open-loop control is automatic process

a) true
b) false

Answer 5

b) false

Question 6

A PLC requires five major hardware components

Answer 6

1. power source
2. input modules
3. a processor
4. output modules
5. programming terminal

Question 7

One of the biggest advantages of a PLC is that a technician can change reconnecting _____.

Answer 7

input and output

Question 8

The processor’s memory section generally has two areas: program files and data files?

a) true
b) false

Answer 8

a) true

Question 9

Analog input modules are used in PLC systems to perform the conversion analog signals to digital values?

a) true
b) false

Answer 9

a) true

Question 10

PLC modules that interface with special sensors and devices are available for particular function?

a) true
b) false

Answer 10

a) true