Question 1

When the examine on sensor instruction is true, the processor:

Accepted Answer

A)  turns on all outputs in the subroutine area.
B)  turns off all outputs in the subroutine area.
C)  stops executing the subroutine.
D)  starts executing the subroutine.

Question 2

The main advantage to the jump-to-label instruction is that:

Accepted Answer

A)  any number of rungs may be programmed between the jump and label rungs.
B)  it allows you to use one set of condition instructions to control multiple outputs.
C)  it allows you to use one set of condition instructions to control multiple inputs.
D)  it has the ability to reduce the processor scan time.

Question 3

Rungs 5, 6, and 7 are not scanned by the processor when rung ____ has logic continuity.

Accepted Answer

A)  1
B)  2
C)  3
D)  4

Question 4

The MCR instruction can be used to control:

Accepted Answer

A)  entire sections of a program.
B)  entire rungs of a program.
C)  selected elements within a rung of a program.
D)  entire sections and entire rungs of a program.

Question 5

You must de-energize the JMP instruction to activate it.

Accepted Answer

A) True 
 B)False

Question 6

The JMP instruction does not contribute to logic continuity and, for all practical purposes, is always logically true.

Accepted Answer

A) True 
 B)False

Question 7

Immediate instructions are most useful when programmed:

Accepted Answer

A)  immediately after the I/O scan has occurred.
B)  immediately prior to the I/O scan.
C)  at the middle or toward the end of the program.
D)  near the beginning of the program.

Question 8

PLC emergency stop circuits should be:

Accepted Answer

A)  hardwired outside the controller program.
B)  programmed as part of the MCR instruction.
C)  programmed as part of the zone control last state instruction.
D)  programmed as an immediate input instruction.

Question 9

The ____ instruction stops the processor from scanning the rest of the program.

Accepted Answer

A)  LBL
B)  IOT
C)  TND
D)  STI

Question 10

When the MCR instruction is false, output(s)  ____ will always be de-energized.

Accepted Answer

A)  M, PL1 and SOL
B)  M and PL1
C)  PL1
D)  SOL

Question 11

The jump-to-subroutine instruction is used where a machine has a portion of its cycle that must be repeated several times during one machine cycle.

Accepted Answer

A) True 
 B)False

Question 12

Random forcing of given inputs or outputs can cause equipment damage.

Accepted Answer

A) True 
 B)False

Question 13

The Immediate Input with Mask (IIM) instruction allows the ladder programmer to update data prior to the normal input scan.

Accepted Answer

A) True 
 B)False

Question 14

The safest way to wire a stop button to a PLC system is to use a normally open contact examined for an off condition.

Accepted Answer

A) True 
 B)False

Question 15

The MCR instruction is not a replacement for a hardwired master control relay that provides emergency stop.

Accepted Answer

A) True 
 B)False

Question 16

Nested subroutines make complex programming easier.

Accepted Answer

A) True 
 B)False

Question 17

The output of 0:2/5 would be ____ and the output of 0:2/6 would be ____ .

Accepted Answer

A)  false ...true
B)  true ...false
C)  false ...false
D)  true ...true

Question 18

The use of the immediate I/O instruction increases the total scan time of the program.

Accepted Answer

A) True 
 B)False

Question 19

Jumps are normally allowed in both the forward and backward directions.

Accepted Answer

A) True 
 B)False

Question 20

The actual status of input 1:1/3 is ____ but the forced status is ____.

Accepted Answer

A)  false ...true
B)  true ...false
C)  false ...false
D)  true ...true

Exam 7: Program Control Instructions

The ____ instruction stops the processor from scanning the rest of the program.

Correct AnswerverifiedShow Answer

The safest way to wire a stop button to a PLC system is to use a normally open contact examined for an off condition.

Correct AnswerverifiedShow Answer

The actual status of input 1:1/3 is ____ but the forced status is ____.

Correct AnswerverifiedShow Answer

When the MCR instruction is false, output(s) ____ will always be de-energized.

Correct AnswerverifiedShow Answer

Jumps are normally allowed in both the forward and backward directions.

Correct AnswerverifiedShow Answer

Immediate instructions are most useful when programmed:

Correct AnswerverifiedShow Answer

The use of the immediate I/O instruction increases the total scan time of the program.

Correct AnswerverifiedShow Answer

Nested subroutines make complex programming easier.

Correct AnswerverifiedShow Answer

The Immediate Input with Mask (IIM) instruction allows the ladder programmer to update data prior to the normal input scan.

Correct AnswerverifiedShow Answer

The MCR instruction can be used to control:

Correct AnswerverifiedShow Answer

PLC emergency stop circuits should be:

Correct AnswerverifiedShow Answer

Rungs 5, 6, and 7 are not scanned by the processor when rung ____ has logic continuity.

Correct AnswerverifiedShow Answer

Random forcing of given inputs or outputs can cause equipment damage.

Correct AnswerverifiedShow Answer

You must de-energize the JMP instruction to activate it.

Correct AnswerverifiedShow Answer

The JMP instruction does not contribute to logic continuity and, for all practical purposes, is always logically true.

Correct AnswerverifiedShow Answer

The main advantage to the jump-to-label instruction is that:

Correct AnswerverifiedShow Answer

The output of 0:2/5 would be ____ and the output of 0:2/6 would be ____ .

Correct AnswerverifiedShow Answer

The jump-to-subroutine instruction is used where a machine has a portion of its cycle that must be repeated several times during one machine cycle.

Correct AnswerverifiedShow Answer

The MCR instruction is not a replacement for a hardwired master control relay that provides emergency stop.

Correct AnswerverifiedShow Answer

When the examine on sensor instruction is true, the processor:

Correct AnswerverifiedShow Answer

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The actual status of input 1:1/3 is but the forced status is .

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The output of 0:2/5 would be and the output of 0:2/6 would be .

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