Question 1

A ground loop circuit can develop when each device's ground is tied to a different earth potential.

Accepted Answer

A) True 
 B)False

Question 2

The processor of a PLC monitors its battery voltage level.

Accepted Answer

A) True 
 B)False

Question 3

Which function of a PLC would be used to view the transition history (on or off states) of a bit(s) ?

Accepted Answer

A)  Change radix.
B)  Forcing.
C)  Cross reference.
D)  Contact histogram.E) A) and C)
F) A) and D)

Question 4

Most solid-state switches will conduct a small amount of leakage current in the off state.

Accepted Answer

A) True 
 B)False

Question 5

Running signal wiring and power wiring in the same conduit helps to cut down on electrical noise.

Accepted Answer

A) True 
 B)False

Question 6

Ground loop circuits cause problems by adding or subtracting current or voltage from input signal sources.

Accepted Answer

A) True 
 B)False

Question 7

With Allen-Bradley controllers ____ software is required to monitor,download,and upload programs.

Accepted Answer

A)  RSLinx
B)  RSLogix
C)  Microsoft word
D)  LogixProE) A) and D)
F) B) and C)

Question 8

In addition to being an important safety measure,proper grounding of a PLC system can:

Accepted Answer

A)  lower installation costs.
B)  increase the power efficiency of the system.
C)  limit the effects of EMI.
D)  assist in the operation of the MCR.E) A) and B)
F) None of the above

Question 9

The temporary end instruction is used when you want to change the amount of logic being scanned.

Accepted Answer

A) True 
 B)False

Question 10

Leakage current can falsely activate a PLC input.

Accepted Answer

A) True 
 B)False

Question 11

The programming device monitor normally indicates a true instruction if the addressed input device is off and examined for an off condition.

Accepted Answer

A) True 
 B)False

Question 12

Which instruction is use to change the amount of logic scanned to progressively debug a program?

Accepted Answer

A)  Suspend
B)  Temporary end
C)  Force
D)  Timed interruptE) A) and B)
F) A) and C)

Question 13

For most PLC installations,a NEMA ____enclosure is recommended.

Accepted Answer

A)  2
B)  4
C)  8
D)  12E) A) and B)
F) None of the above

Question 14

A fiber optic wired control system is most susceptible electrical noise.

Accepted Answer

A) True 
 B)False

Question 15

PLC communications protocol is a standardized method for:

Accepted Answer

A)  programming PLCs.
B)  connection of input devices.
C)  connection of output devices.
D)  transmitting data between different devices.E) A) and C)
F) A) and D)

Question 16

When a grounding connection must be made to the metal enclosure of a PLC system,any paint coating must be removed.

Accepted Answer

A) True 
 B)False

Question 17

With reference to the input module circuit shown,a voltmeter reading of 24 VDC would indicate:

Accepted Answer

A)  normal operation.
B)  a possible shorted PB.
C)  a possible fault in the field wiring.
D)  either b or c.E) A) and B)
F) A) and C)

Question 18

Common potential noise generating devices include noninductive resistive loads.

Accepted Answer

A) True 
 B)False

Question 19

The suspend instruction is used to trap and identify specific conditions.

Accepted Answer

A) True 
 B)False

Question 20

I/O leakage problems usually occur with devices that use:

Accepted Answer

A)  solid-state switching circuits.
B)  hard contacts.
C)  noise-suppression circuits.
D)  voltage-suppression circuits.E) A) and B)
F) A) and C)

Exam 13: Plc Installation Practices,editing,and Troubleshooting

Running signal wiring and power wiring in the same conduit helps to cut down on electrical noise.

Correct AnswerverifiedShow Answer

With Allen-Bradley controllers ____ software is required to monitor,download,and upload programs.

Correct AnswerverifiedShow Answer

The temporary end instruction is used when you want to change the amount of logic being scanned.

Correct AnswerverifiedShow Answer

PLC communications protocol is a standardized method for:

Correct AnswerverifiedShow Answer

The processor of a PLC monitors its battery voltage level.

Correct AnswerverifiedShow Answer

For most PLC installations,a NEMA ____enclosure is recommended.

Correct AnswerverifiedShow Answer

Most solid-state switches will conduct a small amount of leakage current in the off state.

Correct AnswerverifiedShow Answer

The suspend instruction is used to trap and identify specific conditions.

Correct AnswerverifiedShow Answer

Ground loop circuits cause problems by adding or subtracting current or voltage from input signal sources.

Correct AnswerverifiedShow Answer

Common potential noise generating devices include noninductive resistive loads.

Correct AnswerverifiedShow Answer

I/O leakage problems usually occur with devices that use:

Correct AnswerverifiedShow Answer

With reference to the input module circuit shown,a voltmeter reading of 24 VDC would indicate:

Correct AnswerverifiedShow Answer

When a grounding connection must be made to the metal enclosure of a PLC system,any paint coating must be removed.

Correct AnswerverifiedShow Answer

In addition to being an important safety measure,proper grounding of a PLC system can:

Correct AnswerverifiedShow Answer

A fiber optic wired control system is most susceptible electrical noise.

Correct AnswerverifiedShow Answer

The programming device monitor normally indicates a true instruction if the addressed input device is off and examined for an off condition.

Correct AnswerverifiedShow Answer

Leakage current can falsely activate a PLC input.

Correct AnswerverifiedShow Answer

Which function of a PLC would be used to view the transition history (on or off states) of a bit(s) ?

Correct AnswerverifiedShow Answer

A ground loop circuit can develop when each device's ground is tied to a different earth potential.

Correct AnswerverifiedShow Answer

Which instruction is use to change the amount of logic scanned to progressively debug a program?

Correct AnswerverifiedShow Answer

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