Question 1

Which of the following devices can be used for switching the output of a discrete DC output module?

Accepted Answer

A)  Transistor.
B)  Triac.
C)  Relay.
D)  either a or c.E) A) and B)
F) A) and C)

Question 2

Electrical noise usually causes permanent operating errors.

Accepted Answer

A) True 
 B)False  False

Question 3

The PLC chassis comes in different sizes according to the:

Accepted Answer

A)  size of the program.
B)  type of I/O modules used.
C)  number of slots they contain.
D)  all of these.E) A) and C)
F) A) and B)

Question 4

I/O modules are keyed to prevent unauthorized personnel from removing them from the I/O rack.

Accepted Answer

A) True 
 B)False

Question 5

The location of a specific input or output field device is identified by the processor by means of its:

Accepted Answer

A)  voltage rating.
B)  current rating.
C)  wattage rating.
D)  address.E) None of the above
F) A) and D)

Question 6

Light is used in I/O modules to separate the real-world electrical signals from the PLC internal electronic system.

Accepted Answer

A) True 
 B)False

Question 7

Volatile memory elements can be classified as those that:

Accepted Answer

A)  do not retain stored information when the power is removed.
B)  retain stored information when the power is removed.
C)  do not require a battery backup.
D)  both b and c.E) All of the above
F) None of the above

Question 8

In event of a power interruption,a(an) _____ is used in some processors to provide power to the RAM.

Accepted Answer

A)  inductor
B)  capacitor
C)  transistor
D)  resistorE) All of the above
F) A) and C)

Question 9

Analog signals can have only two states.

Accepted Answer

A) True 
 B)False

Question 10

The I/O system provides an interface between:

Accepted Answer

A)  input modules and output modules.
B)  the CPU and field equipment.
C)  the CPU and I/O rack.
D)  the I/O rack and I/O modules.E) A) and D)
F) None of the above B

Question 11

The most common form of memory used to store,back up,or transfer PLC programs is:

Accepted Answer

A)  RAM
B)  Flash EEPROM
C)  EEPROM
D)  both b and cE) None of the above
F) C) and D)

Question 12

A redundant PLC system is configured using two processors.

Accepted Answer

A) True 
 B)False

Question 13

For the block diagram of the input module shown,Section #1 represents the ____ and #2 the ____

Accepted Answer

A)  AC,DC.
B)  DC,AC.
C)  power,logic.
D)  logic,power.E) A) and C)
F) A) and B)

Question 14

I/O modules are normally installed or removed while the PLC is powered.

Accepted Answer

A) True 
 B)False

Question 15

The processor module of the PLC is where the:

Accepted Answer

A)  ladder logic program is stored.
B)  input connections are made.
C)  output connections are made.
D)  sensors are located.E) A) and B)
F) C) and D)

Question 16

Most PLC programming software will allow you to develop programs on another manufacturer's PLC.

Accepted Answer

A) True 
 B)False  False

Question 17

Hot swappable I/O modules are designed to be changed with the power on and the PLC operating.

Accepted Answer

A) True 
 B)False

Question 18

If you had a hand-held programming terminal from one manufacturer you can program only that manufacture's PLC using it.

Accepted Answer

A) True 
 B)False

Question 19

The schematic diagram of Figure 2-6 is an example of how a PLC output module is connected to:

Accepted Answer

A)  isolate the load from the controller.
B)  control a high resistance load.
C)  vary the speed of a motor.
D)  control a high current load.E) B) and D)
F) None of the above

Question 20

A/An ____ input or output is a continuously variable signal within a designated range.

Accepted Answer

A)  discrete
B)  digital
C)  BCD
D)  analogE) C) and D)
F) B) and C)

Exam 2: Plc Hardware Components

Which of the following devices can be used for switching the output of a discrete DC output module?

Correct AnswerverifiedShow Answer

Electrical noise usually causes permanent operating errors.

Correct AnswerverifiedFalse

The PLC chassis comes in different sizes according to the:

Correct AnswerverifiedShow Answer

I/O modules are keyed to prevent unauthorized personnel from removing them from the I/O rack.

Correct AnswerverifiedShow Answer

The location of a specific input or output field device is identified by the processor by means of its:

Correct AnswerverifiedShow Answer

Light is used in I/O modules to separate the real-world electrical signals from the PLC internal electronic system.

Correct AnswerverifiedShow Answer

Volatile memory elements can be classified as those that:

Correct AnswerverifiedShow Answer

In event of a power interruption,a(an) _____ is used in some processors to provide power to the RAM.

Correct AnswerverifiedShow Answer

Analog signals can have only two states.

Correct AnswerverifiedShow Answer

The I/O system provides an interface between:

Correct AnswerverifiedB

The most common form of memory used to store,back up,or transfer PLC programs is:

Correct AnswerverifiedShow Answer

A redundant PLC system is configured using two processors.

Correct AnswerverifiedShow Answer

For the block diagram of the input module shown,Section #1 represents the ____ and #2 the ____

Correct AnswerverifiedShow Answer

I/O modules are normally installed or removed while the PLC is powered.

Correct AnswerverifiedShow Answer

The processor module of the PLC is where the:

Correct AnswerverifiedShow Answer

Most PLC programming software will allow you to develop programs on another manufacturer's PLC.

Correct AnswerverifiedFalse

Hot swappable I/O modules are designed to be changed with the power on and the PLC operating.

Correct AnswerverifiedShow Answer

If you had a hand-held programming terminal from one manufacturer you can program only that manufacture's PLC using it.

Correct AnswerverifiedShow Answer

The schematic diagram of Figure 2-6 is an example of how a PLC output module is connected to:

Correct AnswerverifiedShow Answer

A/An ____ input or output is a continuously variable signal within a designated range.

Correct AnswerverifiedShow Answer

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False

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B

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For the block diagram of the input module shown,Section #1 represents the and #2 the

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False

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