Question 1

When the program scan reaches an immediate I/O instruction, the scan is interrupted and the bits of the addressed word are updated.

Accepted Answer

A) True 
 B)False

Question 2

Assume that the NC stop button is replaced with an NO stop button and that the program is changed so it operates as before. Should the field wire connected to one end of the stop button break off:

Accepted Answer

A)  the motor would stop automatically.
B)  pressing the stop button would stop the motor.
C)  pressing both the start and stop buttons would stop the motor.
D)  none of these.E) All of the above
F) A) and C)

Question 3

The MCR instruction:

Accepted Answer

A)  is an output instruction.
B)  is used in pairs.
C)  is used to disable or enable a zone within a ladder program.
D)  all of these.E) A) and B)
F) All of the above

Question 4

In a jump-to-label program, the label instruction is used to identify the ladder rung that is the target destination of the JMP instruction.

Accepted Answer

A) True 
 B)False

Question 5

Each JMP instruction must have a LBL instruction.

Accepted Answer

A) True 
 B)False

Question 6

When an MCR zone goes false, off-delay timers within the zone will automatically activate and begin their off delay cycle.

Accepted Answer

A) True 
 B)False

Question 7

When the MCR instruction is true, all rung outputs below the MCR will be controlled by their respective input conditions.

Accepted Answer

A) True 
 B)False

Question 8

When the processor scan reaches the RET instruction, it will return the processor to the:

Accepted Answer

A)  start of the program.
B)  end of the program.
C)  rung above the JSR instruction.
D)  rung below the JSR instruction.E) A) and C)
F) C) and D) D

Question 9

Power to the input and output module is controlled by the:

Accepted Answer

A)  master control relay.
B)  start/stop buttons.
C)  main disconnect switch.
D)  All of these choices are correctE) A) and B)
F) All of the above

Question 10

The transformer is used to:

Accepted Answer

A)  isolate the controller from the main power lines.
B)  step up the main power line voltage.
C)  provide the low-voltage do operating voltage for the controller.
D)  All of these choices are correctE) C) and D)
F) A) and D)

Question 11

The label address must match that of the JMP instruction with which it is used.

Accepted Answer

A) True 
 B)False

Question 12

The immediate I/O instruction is most useful if the instruction associated with the device is at the beginning of the program.

Accepted Answer

A) True 
 B)False  False

Question 13

A latch instruction will automatically unlatch if it is contained within a de-energized MCR zone.

Accepted Answer

A) True 
 B)False

Question 14

Power to the processor module is controlled by the:

Accepted Answer

A)  master control relay.
B)  start/stop buttons.
C)  main disconnect switch.
D)  All of these choices are correctE) None of the above
F) All of the above

Question 15

The use of a motor starter seal-in contact in place of a programmed contact provides positive feedback about the exact status of the motor.

Accepted Answer

A) True 
 B)False

Question 16

The immediate I/O instruction is used with critical I/O devices that require updating in advance of the I/O scan.

Accepted Answer

A) True 
 B)False

Question 17

In general, program control instructions are used to alter the program scan from its normal sequence.

Accepted Answer

A) True 
 B)False

Question 18

A JMP instruction is similar to a(n) :

Accepted Answer

A)  MCR command.
B)  ZCL command.
C)  skip command.
D)  JSR command.E) C) and D)
F) B) and C)

Question 19

The fault routine allows for an orderly shutdown in case of a fault.

Accepted Answer

A) True 
 B)False  True

Question 20

The jump-to-subroutine instruction can save a great deal of duplicate programming in cases:

Accepted Answer

A)  that require the programming of several timers.
B)  that require the programming of several counters.
C)  where a machine has a portion of its cycle that must be repeated several times during one machine cycle.
D)  all of these.E) All of the above
F) A) and B)

Exam 7: Program Control Instructions

When the program scan reaches an immediate I/O instruction, the scan is interrupted and the bits of the addressed word are updated.

Correct AnswerverifiedShow Answer

Assume that the NC stop button is replaced with an NO stop button and that the program is changed so it operates as before. Should the field wire connected to one end of the stop button break off:

Correct AnswerverifiedShow Answer

The MCR instruction:

Correct AnswerverifiedShow Answer

In a jump-to-label program, the label instruction is used to identify the ladder rung that is the target destination of the JMP instruction.

Correct AnswerverifiedShow Answer

Each JMP instruction must have a LBL instruction.

Correct AnswerverifiedShow Answer

When an MCR zone goes false, off-delay timers within the zone will automatically activate and begin their off delay cycle.

Correct AnswerverifiedShow Answer

When the MCR instruction is true, all rung outputs below the MCR will be controlled by their respective input conditions.

Correct AnswerverifiedShow Answer

When the processor scan reaches the RET instruction, it will return the processor to the:

Correct AnswerverifiedD

Power to the input and output module is controlled by the:

Correct AnswerverifiedShow Answer

The transformer is used to:

Correct AnswerverifiedShow Answer

The label address must match that of the JMP instruction with which it is used.

Correct AnswerverifiedShow Answer

The immediate I/O instruction is most useful if the instruction associated with the device is at the beginning of the program.

Correct AnswerverifiedFalse

A latch instruction will automatically unlatch if it is contained within a de-energized MCR zone.

Correct AnswerverifiedShow Answer

Power to the processor module is controlled by the:

Correct AnswerverifiedShow Answer

The use of a motor starter seal-in contact in place of a programmed contact provides positive feedback about the exact status of the motor.

Correct AnswerverifiedShow Answer

The immediate I/O instruction is used with critical I/O devices that require updating in advance of the I/O scan.

Correct AnswerverifiedShow Answer

In general, program control instructions are used to alter the program scan from its normal sequence.

Correct AnswerverifiedShow Answer

A JMP instruction is similar to a(n) :

Correct AnswerverifiedShow Answer

The fault routine allows for an orderly shutdown in case of a fault.

Correct AnswerverifiedTrue

The jump-to-subroutine instruction can save a great deal of duplicate programming in cases:

Correct AnswerverifiedShow Answer

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D

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False

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True

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