Industrial Automation-Quiz 3

What is the name of the given block?

• Asynchronous pulse generator

• ON delay timer

• OFF delay timer

• Weekly timer

How to interlock the given LAD for safety proposes?

• Remove the NC contact of Q2

• Add a NO contact of Q1 in series with I4

• Add a NC contact of Q1 in series with I4

• Add a NC contact of Q1 in parallel with I4

Programmable Logic Controller (or PLC) is a specialized _____________ that can control machines and processes.

• A. analog computer

• B. digital computer

• C. input interface

• D. output interface

• E. actuator

Which of the following is NOT considered as a PLC application?

• A. Sorting application

• B. Controlling a factory assembly line

• C. Automatic door control system

• D. Traffic Lights

• E. Switching ON and OFF AC motors

Which of the following best describe(s) the PLC scan cycle?

I. Called self-test

II. Takes time often measured in ms

III. Consists of three steps input scan, executing programs, and output scan

• A. I only

• B. I and II only

• C. I and III only

• D. II and III only

• E. I, II and III

4. Which of the following is a disadvantage of unitary PLC?

• A. Limited number of inputs and outputs

• B. Less scanning time

• C. Scanning time increases with the increase in input and output modules

• D. Inexpensive

• E. Less troubleshooting time

Which of the following is a part of a PLC CPU?

• A. Address buses

• B. Arithmetic Logic Unit

• C. Input unit D. Output unit

• E. Relays

If any part of this PLC fails then the whole unit has to be replaced

• Modular

• Unitary

• Rack-Mounted

Which of the following can be used in a mall parking lot where it should count the cars entering the mall every day

• A

• B

• C

• D

• E

Which of the following shows the Boolean expression for the given FBD?

• Q= (̅I̅3̅ ̅.̅I̅1̅̅ ̅.̅I̅2̅)+I4

• Q=I4+I2+I1+I̅3

• Q= (I3 .I1 .I2)+I4

• Q= (I̅3 .I1 .I2)+I4