Question 1

I/Os are typical of small PLCs that come in one package with no separate removable units.

Accepted Answer

A)  Fixed
B)  Modular
C)  Digital
D)  AnalogE) C) and D)
F) B) and D)

Question 2

Block No.6 of the PLC block diagram represents the:

Accepted Answer

A)  processor module.
B)  power supply module.
C)  input module.
D)  output module.E) B) and C)
F) A) and B)

Question 3

The voltage that would be present between the DC common and terminal 4 with the pushbutton closed would be approximately:

Accepted Answer

A)  0 volts.
B)  6 volts.
C)  12 volts.
D)  24 volts.E) B) and C)
F) A) and D)

Question 4

Which module of the PLC is responsible for performing logical operations?

Accepted Answer

A)  Processor
B)  Input
C)  Output
D)  Power supplyE) All of the above
F) None of the above

Question 5

Software installed and run on a personal computer can be used to write a PLC program.

Accepted Answer

A) True 
 B)False

Question 6

The number of I/O points does not affect the memory size required for a PLC installation.

Accepted Answer

A) True 
 B)False

Question 7

Removing the programming device from the PLC will not affect the operation of the user program.

Accepted Answer

A) True 
 B)False

Question 8

Block No.3 of the PLC block diagram represents the:

Accepted Answer

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

Question 9

In order to energize the starter coil:

Accepted Answer

A)  the pressure switch,and the temperature switch,and the manual pushbutton must be closed.
B)  the pressure switch,or the temperature switch,or the manual pushbutton must be closed.
C)  the pressure switch,and the temperature switch,or the manual pushbutton must be closed.
D)  All of the above.E) A) and D)
F) All of the above

Question 10

At the start of the PLC scan the:

Accepted Answer

A)  status of all inputs are read.
B)  status of all outputs are updated.
C)  program is executed.
D)  diagnostics and communications tasks are executed.E) A) and C)
F) B) and C)

Question 11

The instruction set for a particular PLC lists the types of instructions supported.

Accepted Answer

A) True 
 B)False

Question 12

PLCs were originally designed as replacements for:

Accepted Answer

A)  microcomputers.
B)  relay control panels.
C)  analog controllers.
D)  digital controllers.E) B) and C)
F) A) and D)

Question 13

The main difference between a PLC and relay control system is that:

Accepted Answer

A)  different types of input devices are used.
B)  different types of output devices are used.
C)  different input and output voltage levels are used.
D)  one uses hardwired relay control logic and the other uses programmed instructions.E) A) and B)
F) B) and D)

Question 14

Which module of the PLC connects directly to field devices such as pilot lights,motor starters,and solenoids?

Accepted Answer

A)  Input
B)  Output
C)  Power supply
D)  MemoryE) B) and C)
F) None of the above

Question 15

A PLC power supply module does not normally supply power to the field devices.

Accepted Answer

A) True 
 B)False

Question 16

The programming device:

Accepted Answer

A)  is used to enter the program into the memory of the processor.
B)  is commonly a personal computer.
C)  can be a hand-held device.
D)  All of the above.E) A) and B)
F) All of the above

Question 17

Unlike personal computers,PLCs are:

Accepted Answer

A)  equipped with input and output modules.
B)  equipped with a control programming language.
C)  designed for the industrial environment.
D)  All of the above.E) A) and B)
F) B) and C)

Question 18

The diagram shown is that of a:

Accepted Answer

A)  relay schematic.
B)  ladder logic program.
C)  input module wiring diagram.
D)  output module wiring diagram.E) C) and D)
F) A) and B)

Question 19

One disadvantage of modular I/O is its lack of flexibility.

Accepted Answer

A) True 
 B)False

Exam 1: Programmable Logic Controllers Plcs: an Overview

A PLC power supply module does not normally supply power to the field devices.

Correct Answer
verified

Which module of the PLC connects directly to field devices such as pilot lights,motor starters,and solenoids?

Correct Answer
verified

Removing the programming device from the PLC will not affect the operation of the user program.

Correct Answer
verified

The main difference between a PLC and relay control system is that:

Correct Answer
verified

At the start of the PLC scan the:

Correct Answer
verified

The programming device:

Correct Answer
verified

Which module of the PLC is responsible for performing logical operations?

Correct Answer
verified

The instruction set for a particular PLC lists the types of instructions supported.

Correct Answer
verified

Software installed and run on a personal computer can be used to write a PLC program.

Correct Answer
verified

The voltage that would be present between the DC common and terminal 4 with the pushbutton closed would be approximately:

Correct Answer
verified

One disadvantage of modular I/O is its lack of flexibility.

Correct Answer
verified

Unlike personal computers,PLCs are:

Correct Answer
verified

Block No.3 of the PLC block diagram represents the:

Correct Answer
verified

The diagram shown is that of a:

Correct Answer
verified

PLCs were originally designed as replacements for:

Correct Answer
verified

The number of I/O points does not affect the memory size required for a PLC installation.

Correct Answer
verified

In order to energize the starter coil:

Correct Answer
verified

Block No.6 of the PLC block diagram represents the:

Correct Answer
verified

I/Os are typical of small PLCs that come in one package with no separate removable units.

Correct Answer
verified

Exam 1: Programmable Logic Controllers Plcs: an Overview

A PLC power supply module does not normally supply power to the field devices.

Correct AnswerverifiedShow Answer

Which module of the PLC connects directly to field devices such as pilot lights,motor starters,and solenoids?

Correct AnswerverifiedShow Answer

Removing the programming device from the PLC will not affect the operation of the user program.

Correct AnswerverifiedShow Answer

The main difference between a PLC and relay control system is that:

Correct AnswerverifiedShow Answer

At the start of the PLC scan the:

Correct AnswerverifiedShow Answer

The programming device:

Correct AnswerverifiedShow Answer

Which module of the PLC is responsible for performing logical operations?

Correct AnswerverifiedShow Answer

The instruction set for a particular PLC lists the types of instructions supported.

Correct AnswerverifiedShow Answer

Software installed and run on a personal computer can be used to write a PLC program.

Correct AnswerverifiedShow Answer

The voltage that would be present between the DC common and terminal 4 with the pushbutton closed would be approximately:

Correct AnswerverifiedShow Answer

One disadvantage of modular I/O is its lack of flexibility.

Correct AnswerverifiedShow Answer

Unlike personal computers,PLCs are:

Correct AnswerverifiedShow Answer

Block No.3 of the PLC block diagram represents the:

Correct AnswerverifiedShow Answer

The diagram shown is that of a:

Correct AnswerverifiedShow Answer

PLCs were originally designed as replacements for:

Correct AnswerverifiedShow Answer

The number of I/O points does not affect the memory size required for a PLC installation.

Correct AnswerverifiedShow Answer

In order to energize the starter coil:

Correct AnswerverifiedShow Answer

Block No.6 of the PLC block diagram represents the:

Correct AnswerverifiedShow Answer

I/Os are typical of small PLCs that come in one package with no separate removable units.

Correct AnswerverifiedShow Answer

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