Question 1

The output interface module connects to:

Accepted Answer

A)  sensing devices such as switches or pushbuttons.
B)  load devices such as lamps or solenoids.
C)  a programming device such as a computer.
D)  All of the above. B

Question 2

Basically,the function of a PLC is to:

Accepted Answer

A)  amplify various weak signal sources.
B)  control a high voltage output with a low voltage input.
C)  control the speed of motors.
D)  make logical decisions and control outputs based on them.

Question 3

In a PLC system,there is a physical connection between field input devices and output devices.

Accepted Answer

A) True 
 B)False

Question 4

The input/output system forms the interfaces through which field devices are connected to the controller.

Accepted Answer

A) True 
 B)False

Question 5

When dealing with PLC memory,one K of memory represents 1024.

Accepted Answer

A) True 
 B)False

Question 6

Programmable logic controllers are categorized according to the

Accepted Answer

A)  number of I/O points.
B)  current rating of I/O modules.
C)  power rating of the I/O modules.
D)  cost of the I/O modules.

Question 7

The power required to operate the logic circuits of the processor unit is typically:

Accepted Answer

A)  low voltage ac.
B)  high voltage ac.
C)  low voltage dc.
D)  high voltage dc.

Question 8

Field or real-world devices refer to:

Accepted Answer

A)  input devices only.
B)  output devices only.
C)  load devices only.
D)  all devices that are physically wired to the PLC.

Question 9

Block No.1 of the PLC block diagram represents the:

Accepted Answer

A)  CPU unit.
B)  programming device.
C)  input module.
D)  output module.

Question 10

PLC proprietary architecture:

Accepted Answer

A)  is the opposite to open architecture.
B)  makes it more difficult to connect to devices made by other PLC manufacturers.
C)  does not allow programs to be interchanged between different PLC manufacturers.
D)  All of the above.

Question 11

The diagram shown is that of a

Accepted Answer

A)  hardwired relay schematic.
B)  ladder logic program.
C)  input module schematic.
D)  output module schematic. A

Question 12

A control management PLC application normally requires a:

Accepted Answer

A)  micro-size PLC.
B)  small-size PLC.
C)  medium-size PLC.
D)  large-size PLC.

Question 13

The number and type of I/Os cannot be changed in a fixed PLC.

Accepted Answer

A) True 
 B)False

Question 14

The programming device must be connected to the controller:

Accepted Answer

A)  at all times.
B)  when entering a program.
C)  when monitoring a program.
D)  both b and c.

Question 15

PLC software that runs on a personal computer can be used to:

Accepted Answer

A)  write a PLC program.
B)  document a PLC program.
C)  monitor the control process.
D)  All of the above.

Question 16

The PLC power supply module normally is rated to provide the power for:

Accepted Answer

A)  all field devices.
B)  input field devices only.
C)  output field devices only.
D)  PLC backplane and I/O modules. D

Question 17

When a field device contact connected to the input module closes:

Accepted Answer

A)  a logic 1 is recorded in the memory location of the coil with the same address.
B)  a logic 1 is recorded in the memory location of the contact with the same address.
C)  a logic 0 is recorded in the memory location of the coil with the same address.
D)  None of these are correct.

Question 18

Block No.4 of the PLC block diagram represents the:

Accepted Answer

A)  memory.
B)  programming device.
C)  input module.
D)  CPU.

Question 19

Block No.5 of the PLC block diagram represents the:

Accepted Answer

A)  memory.
B)  power supply module.
C)  input module.
D)  output module.

Question 20

Modifying relay-type process control circuits usually involves changing the:

Accepted Answer

A)  circuit wiring.
B)  input circuit modules.
C)  output circuit modules.
D)  circuit operating voltage levels.

Exam 1: Programmable Logic Controllers Plcs: an Overview

The output interface module connects to:

Correct AnswerverifiedB

Basically,the function of a PLC is to:

Correct AnswerverifiedShow Answer

In a PLC system,there is a physical connection between field input devices and output devices.

Correct AnswerverifiedShow Answer

The input/output system forms the interfaces through which field devices are connected to the controller.

Correct AnswerverifiedShow Answer

When dealing with PLC memory,one K of memory represents 1024.

Correct AnswerverifiedShow Answer

Programmable logic controllers are categorized according to the

Correct AnswerverifiedShow Answer

The power required to operate the logic circuits of the processor unit is typically:

Correct AnswerverifiedShow Answer

Field or real-world devices refer to:

Correct AnswerverifiedShow Answer

Block No.1 of the PLC block diagram represents the:

Correct AnswerverifiedShow Answer

PLC proprietary architecture:

Correct AnswerverifiedShow Answer

The diagram shown is that of a

Correct AnswerverifiedA

A control management PLC application normally requires a:

Correct AnswerverifiedShow Answer

The number and type of I/Os cannot be changed in a fixed PLC.

Correct AnswerverifiedShow Answer

The programming device must be connected to the controller:

Correct AnswerverifiedShow Answer

PLC software that runs on a personal computer can be used to:

Correct AnswerverifiedShow Answer

The PLC power supply module normally is rated to provide the power for:

Correct AnswerverifiedD

When a field device contact connected to the input module closes:

Correct AnswerverifiedShow Answer

Block No.4 of the PLC block diagram represents the:

Correct AnswerverifiedShow Answer

Block No.5 of the PLC block diagram represents the:

Correct AnswerverifiedShow Answer

Modifying relay-type process control circuits usually involves changing the:

Correct AnswerverifiedShow Answer

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B

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A

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D

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