Question 1

A PLC will treat all inputs and output sources the same; they will be looked upon as a(n) ____.

Accepted Answer

A)   signal
B)   voltage source
C)   resistance
D)   load D

Question 2

Which PLC language is a BASIC style language?

Accepted Answer

A)   Sequential Function Chart
B)   Structured Text
C)   Ladder Diagram
D)   Instruction List B

Question 3

The five programming languages for PLCs are the ladder diagram, the function block diagram, the instruction list, the sequential function chart and the structured graphic.

Accepted Answer

A) True 
 B)False  False

Question 4

____ timers perform a timing function while receiving power. The state of the associated contact(s) do not change until the timer has timed out.

Accepted Answer

A)   Coil
B)   Off-Delay
C)   On-delay
D)   End

Question 5

Digital input modules are available for DC inputs, AC inputs, or a mix.

Accepted Answer

A) True 
 B)False

Question 6

The Function Block Diagram is a(n) ____ language.

Accepted Answer

A)   graphical
B)   text-based
C)   BASIC style
D)   C++ style

Question 7

Down-counters perform a counting function when the associated input element transitions from a(n) ____ to a(n) ____ state.

Accepted Answer

A)   on, off
B)   off, on
C)   on, reset
D)   off, reset

Question 8

____ timers will retain their timed value during a loss of power.

Accepted Answer

A)   Retentive
B)   Nonretentive
C)   On-delay
D)   Off-delay

Question 9

___ coil is a nonretentive coil used to perform a latch function.

Accepted Answer

A)   SET
B)   RESET
C)   LET
D)   TLC

Question 10

Instruction List is a low-level program best suited for small applications and fast execution.

Accepted Answer

A) True 
 B)False

Question 11

Which is a PLC program control instruction?

Accepted Answer

A)   LOCATION
B)   SEND
C)   MRC
D)   ENDMCR

Question 12

Most PLCs consist of an assortment of modules (input and output), a CPU, a power supply, and a rack in which to mount the modules.

Accepted Answer

A) True 
 B)False

Question 13

A(n) ____ output module will produce output signals that are either 0 to 10 VDC or 4 to 20 milliamperes.

Accepted Answer

A)   analog
B)   digital
C)   differential
D)   variable

Question 14

____ coils revert to their de-energized state whenever the PLC is cycled from stop to run or whenever the power is cycled.

Accepted Answer

A)   Retentive
B)   Nonretentive
C)   Negative
D)   Open

Question 15

One big advantage of using point-to-point wiring of relay controls over a PLC is that the wiring is greatly simplified and reduced.

Accepted Answer

A) True 
 B)False

Exam 24: Programmable Logic Controllers

A PLC will treat all inputs and output sources the same; they will be looked upon as a(n) ____.

Which PLC language is a BASIC style language?

The five programming languages for PLCs are the ladder diagram, the function block diagram, the instruction list, the sequential function chart and the structured graphic.

____ timers perform a timing function while receiving power. The state of the associated contact(s) do not change until the timer has timed out.

Digital input modules are available for DC inputs, AC inputs, or a mix.

The Function Block Diagram is a(n) ____ language.

Down-counters perform a counting function when the associated input element transitions from a(n) to a(n) state.

____ timers will retain their timed value during a loss of power.

___ coil is a nonretentive coil used to perform a latch function.

Instruction List is a low-level program best suited for small applications and fast execution.

Which is a PLC program control instruction?

Most PLCs consist of an assortment of modules (input and output), a CPU, a power supply, and a rack in which to mount the modules.

A(n) ____ output module will produce output signals that are either 0 to 10 VDC or 4 to 20 milliamperes.

____ coils revert to their de-energized state whenever the PLC is cycled from stop to run or whenever the power is cycled.

One big advantage of using point-to-point wiring of relay controls over a PLC is that the wiring is greatly simplified and reduced.