Question 1

The data monitor feature of a PLC may allow you to:

Accepted Answer

A) change the radix or data format. 
B) store data for an instruction prior to use. 
C) view data within an instruction. 
D) all of these. 
A) change the radix or data format. 
B) store data for an instruction prior to use. 
C) view data within an instruction. 
D) all of these. D

Question 2

I/O module leakage current is caused by bleeder resistors.

Accepted Answer

A) True 
 B)False  False

Question 3

With reference to the condition illustrated, what is the most likely fault?

Accepted Answer

A) Short circuit in the field device or wiring 
B) Input module fault 
C) Processor module fault 
D) Open in the field device or wiring 
A) Short circuit in the field device or wiring 
B) Input module fault 
C) Processor module fault 
D) Open in the field device or wiring A

Question 4

Using PLC editing functions, instructions and rungs can be added, deleted, or modified.

Accepted Answer

A) True 
 B)False

Question 5

Preparing a PLC control process for start-up is called:

Accepted Answer

A) commissioning. 
B) troubleshooting. 
C) validating. 
D) installing. 
A) commissioning. 
B) troubleshooting. 
C) validating. 
D) installing.

Question 6

One of the diagnostic checks carried out by the processor is the proper operation of all I/O devices.

Accepted Answer

A) True 
 B)False

Question 7

The procedure of pre-start-up inspection is commonly referred to as field checkout, or commissioning.

Accepted Answer

A) True 
 B)False

Question 8

The input wiring or device is suspected as being the source of a PLC problem. If this circuit is not at fault, then the status indicator on the input module should be illuminated when the input device is:

Accepted Answer

A) closed and programmed for an XIC condition. 
B) open and programmed for an XIO condition. 
C) closed, regardless of how it is programmed. 
D) open, regardless of how it is programmed. 
A) closed and programmed for an XIC condition. 
B) open and programmed for an XIO condition. 
C) closed, regardless of how it is programmed. 
D) open, regardless of how it is programmed.

Question 9

A watchdog timer is used to monitor:

Accepted Answer

A) how long it takes the CPU to complete a scan. 
B) battery voltage. 
C) memory circuits. 
D) all of these. 
A) how long it takes the CPU to complete a scan. 
B) battery voltage. 
C) memory circuits. 
D) all of these.

Question 10

The status indicator on an input module will normally be illuminated if the input device is off and examined for an off condition.

Accepted Answer

A) True 
 B)False

Question 11

Malfunctions due to electrical noise interference usually cause:

Accepted Answer

A) temporary occurrences of operating errors. 
B) permanent occurrences of operating errors. 
C) temporary loss of memory. 
D) permanent loss of memory. 
A) temporary occurrences of operating errors. 
B) permanent occurrences of operating errors. 
C) temporary loss of memory. 
D) permanent loss of memory.

Question 12

Typically, PLC systems installed inside an enclosure can withstand a maximum of:

Accepted Answer

A) 60°C outside the enclosure. 
B) 50°C outside the enclosure. 
C) 60°C inside the enclosure. 
D) 50°C inside the enclosure. 
A) 60°C outside the enclosure. 
B) 50°C outside the enclosure. 
C) 60°C inside the enclosure. 
D) 50°C inside the enclosure.

Question 13

Preparing a PLC control process for initial start-up is known as commissioning.

Accepted Answer

A) True 
 B)False

Question 14

A hardwired electromechanical master control relay is not normally included as part of the wiring for a PLC system.

Accepted Answer

A) True 
 B)False

Question 15

Excessive line voltage variations to a PLC installation can be corrected by installing a:

Accepted Answer

A) constant voltage transformer. 
B) step-down transformer. 
C) step-up transformer. 
D) current transformer. 
A) constant voltage transformer. 
B) step-down transformer. 
C) step-up transformer. 
D) current transformer.

Question 16

PLC output modules may incorporate fuse or electronic protection for output circuitry.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

An addressing conflict is caused by the same address being used for two or more coil instructions in the same program.

Accepted Answer

A) True 
 B)False

Question 19

A diode can be connected in reverse-bias across a DC solenoid to suppress voltage spikes.

Accepted Answer

A) True 
 B)False

Question 20

With reference to the troubleshooting guide, which condition indicates no fault?

Accepted Answer

A) Condition (a) 
B) Condition (b) 
C) Condition (c) 
D) Condition (d) 
A) Condition (a) 
B) Condition (b) 
C) Condition (c) 
D) Condition (d)

The data monitor feature of a PLC may allow you to:

I/O module leakage current is caused by bleeder resistors.

With reference to the condition illustrated, what is the most likely fault?

Using PLC editing functions, instructions and rungs can be added, deleted, or modified.

Preparing a PLC control process for start-up is called:

One of the diagnostic checks carried out by the processor is the proper operation of all I/O devices.

The procedure of pre-start-up inspection is commonly referred to as field checkout, or commissioning.

The input wiring or device is suspected as being the source of a PLC problem. If this circuit is not at fault, then the status indicator on the input module should be illuminated when the input device is:

A watchdog timer is used to monitor:

The status indicator on an input module will normally be illuminated if the input device is off and examined for an off condition.

Malfunctions due to electrical noise interference usually cause:

Typically, PLC systems installed inside an enclosure can withstand a maximum of:

Preparing a PLC control process for initial start-up is known as commissioning.

A hardwired electromechanical master control relay is not normally included as part of the wiring for a PLC system.

Excessive line voltage variations to a PLC installation can be corrected by installing a:

PLC output modules may incorporate fuse or electronic protection for output circuitry.

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

An addressing conflict is caused by the same address being used for two or more coil instructions in the same program.

A diode can be connected in reverse-bias across a DC solenoid to suppress voltage spikes.

With reference to the troubleshooting guide, which condition indicates no fault?

Programmable Logic Controllers Plcs an Overview Difficulty: Easy Gradable: Automatic

PLC Hardware Components

Number Systems and Codes

Fundamentals of Logic Difficulty: Easy Gradable: Automatic

Programming Timers

Developing Fundamental Plc Wiring Diagrams and Ladder Logic Programs

Program Control Instructions

Data Manipulation Instructions

Sequencer and Shift Register Instructions

Process Control, Network Systems and Scada

Controllogix Controllers

Memory and Project Organization

Bit Level Programming

Programming Timers

Programming Counters

Math, Comparison, and Move Instructions

Function Block Programming

Filters

Exam 10: PLC Installation Practices, Editing, and Troubleshooting

The data monitor feature of a PLC may allow you to:

I/O module leakage current is caused by bleeder resistors.

With reference to the condition illustrated, what is the most likely fault?

Using PLC editing functions, instructions and rungs can be added, deleted, or modified.

Preparing a PLC control process for start-up is called:

One of the diagnostic checks carried out by the processor is the proper operation of all I/O devices.

The procedure of pre-start-up inspection is commonly referred to as field checkout, or commissioning.

The input wiring or device is suspected as being the source of a PLC problem. If this circuit is not at fault, then the status indicator on the input module should be illuminated when the input device is:

A watchdog timer is used to monitor:

The status indicator on an input module will normally be illuminated if the input device is off and examined for an off condition.

Malfunctions due to electrical noise interference usually cause:

Typically, PLC systems installed inside an enclosure can withstand a maximum of:

Preparing a PLC control process for initial start-up is known as commissioning.

A hardwired electromechanical master control relay is not normally included as part of the wiring for a PLC system.

Excessive line voltage variations to a PLC installation can be corrected by installing a:

PLC output modules may incorporate fuse or electronic protection for output circuitry.

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

An addressing conflict is caused by the same address being used for two or more coil instructions in the same program.

A diode can be connected in reverse-bias across a DC solenoid to suppress voltage spikes.

With reference to the troubleshooting guide, which condition indicates no fault?

Programmable Logic Controllers Plcs an Overview Difficulty: Easy Gradable: Automatic

PLC Hardware Components

Number Systems and Codes

Fundamentals of Logic Difficulty: Easy Gradable: Automatic

Programming Timers

Developing Fundamental Plc Wiring Diagrams and Ladder Logic Programs

Program Control Instructions

Data Manipulation Instructions

Sequencer and Shift Register Instructions

Process Control, Network Systems and Scada

Controllogix Controllers

Memory and Project Organization

Bit Level Programming

Programming Timers

Programming Counters

Math, Comparison, and Move Instructions

Function Block Programming

Filters