PLC Test 1 Questions With All Correct &
Verified Answers
PLCs were originally designed as replacements for Correct answer-Relay control panels
Field or real-world devices refer to Correct answer-All devices physically wired to the PLC
The output interface module connects to Correct answer-Load devices such as lamps or solenoids
Scan time is the time required to Correct answer-Execute one cycle of the total program
The programming device must be connected to the controller to run the program Correct answer-
True programming devices used to enter desired program into the memory of the processor
Programmable logic controller's are categorized according to the Correct answer-Number of I/O
points
One disadvantage of modular I/O is it's lack of flexibility Correct answer-False... PLCs with the
modular I/O consist of divided compartments into which separate models can be plugged this
feature greatly increases the designers options and the units flexibility
Standard programming language used to develop a series of instructions that direct the PLC to
execute actions is Correct answer-Ladder logic
One function of a PLC input interface module is to Correct answer-Except signals from field devices
and convert them into signals that can be used by the processor
Module inserted into the wrong slot could be damaged Correct answer-True... He module inserted
into the wrong side could be damaged by improper voltage is connected through the wiring
Status indicators are provided on each output of an output module to indicate that the Correct
answer-Output is active
Which model of the PLC Connects directly to the field devices such as pilot lights motor starters and
solenoids Correct answer-Output
Discrete means that each output or input has two states: true on... false off Correct answer-True
A _____ is an example of an actuator that could be controlled by discrete output from a PLC
Correct answer-Motor starter
The current sourcing Sensor shown must be matched with a ____ PLC input module Correct
answer-Current sinking
The Allen - Bradley SLC - 500 address I: 2/4 refers to a Correct answer-Input module in slot 2
terminal 4
Discrete I/O modules can be classified as Correct answer-Bit oriented
, The Alan - Bradley SLC - 500 address o: 3/0 refers to a Correct answer-Output module in slot three
terminal four
Which of the following specifications defines the number of field inputs or outputs that could be
connected to a single module? Correct answer-Points per module
Analog modules can be either voltage sensing or current sensing Correct answer-True
Memory elements that store information in a PLC are called bits which refers to binary digits
Correct answer-True
an analog signal... Correct answer-Can have an infinite number of states
Typically a word in a PLC is Correct answer-16 bits
The electrical isolation of an analog I/O module specifies how accurately an analog value can be
represented digitally Correct answer-False... The resolution of an analog I/O module specifies how
accurately an analog value can be represented digitally
The location of a specific input or output feel device is identified by the processor by means of its
function Correct answer-False... The location of a specific input or output field device is identified
by the processor by means of its address
An analog module: Correct answer-Uses A/D and D/A converters
A push button input field device would most likely be used to provide the signal to an analog input
module Correct answer-False... A pushbutton input field device would most likely be used to
provide the signal to a discrete input module
A unipolar module can except an input signal ranging from -5 V to +5 V Correct answer-False... A
unipolar module can except an input signal that varies in the positive direction only
The selector switches on our workstations are close when the switch is turned to the right Correct
answer-True
What is the identifying number in the model number that established the modules are compatible
with the Allen - Bradley SLC - 500 family Correct answer-1746
How much memory comes with the processors in the workstations in our lab Correct answer-16 K
What is the file extension for a RSLogix project Correct answer-.rss
What power supply is connected to the normally open push buttons on the workstation Correct
answer-24 VAC
In order to read I/O for a project what must you do first? Correct answer-Turn on the main switch
on the workstation
What is the advantage of choosing a current sensing device over a voltage sensing device for an
analog input Correct answer-The current sensing device is less Susceptible to noise
Verified Answers
PLCs were originally designed as replacements for Correct answer-Relay control panels
Field or real-world devices refer to Correct answer-All devices physically wired to the PLC
The output interface module connects to Correct answer-Load devices such as lamps or solenoids
Scan time is the time required to Correct answer-Execute one cycle of the total program
The programming device must be connected to the controller to run the program Correct answer-
True programming devices used to enter desired program into the memory of the processor
Programmable logic controller's are categorized according to the Correct answer-Number of I/O
points
One disadvantage of modular I/O is it's lack of flexibility Correct answer-False... PLCs with the
modular I/O consist of divided compartments into which separate models can be plugged this
feature greatly increases the designers options and the units flexibility
Standard programming language used to develop a series of instructions that direct the PLC to
execute actions is Correct answer-Ladder logic
One function of a PLC input interface module is to Correct answer-Except signals from field devices
and convert them into signals that can be used by the processor
Module inserted into the wrong slot could be damaged Correct answer-True... He module inserted
into the wrong side could be damaged by improper voltage is connected through the wiring
Status indicators are provided on each output of an output module to indicate that the Correct
answer-Output is active
Which model of the PLC Connects directly to the field devices such as pilot lights motor starters and
solenoids Correct answer-Output
Discrete means that each output or input has two states: true on... false off Correct answer-True
A _____ is an example of an actuator that could be controlled by discrete output from a PLC
Correct answer-Motor starter
The current sourcing Sensor shown must be matched with a ____ PLC input module Correct
answer-Current sinking
The Allen - Bradley SLC - 500 address I: 2/4 refers to a Correct answer-Input module in slot 2
terminal 4
Discrete I/O modules can be classified as Correct answer-Bit oriented
, The Alan - Bradley SLC - 500 address o: 3/0 refers to a Correct answer-Output module in slot three
terminal four
Which of the following specifications defines the number of field inputs or outputs that could be
connected to a single module? Correct answer-Points per module
Analog modules can be either voltage sensing or current sensing Correct answer-True
Memory elements that store information in a PLC are called bits which refers to binary digits
Correct answer-True
an analog signal... Correct answer-Can have an infinite number of states
Typically a word in a PLC is Correct answer-16 bits
The electrical isolation of an analog I/O module specifies how accurately an analog value can be
represented digitally Correct answer-False... The resolution of an analog I/O module specifies how
accurately an analog value can be represented digitally
The location of a specific input or output feel device is identified by the processor by means of its
function Correct answer-False... The location of a specific input or output field device is identified
by the processor by means of its address
An analog module: Correct answer-Uses A/D and D/A converters
A push button input field device would most likely be used to provide the signal to an analog input
module Correct answer-False... A pushbutton input field device would most likely be used to
provide the signal to a discrete input module
A unipolar module can except an input signal ranging from -5 V to +5 V Correct answer-False... A
unipolar module can except an input signal that varies in the positive direction only
The selector switches on our workstations are close when the switch is turned to the right Correct
answer-True
What is the identifying number in the model number that established the modules are compatible
with the Allen - Bradley SLC - 500 family Correct answer-1746
How much memory comes with the processors in the workstations in our lab Correct answer-16 K
What is the file extension for a RSLogix project Correct answer-.rss
What power supply is connected to the normally open push buttons on the workstation Correct
answer-24 VAC
In order to read I/O for a project what must you do first? Correct answer-Turn on the main switch
on the workstation
What is the advantage of choosing a current sensing device over a voltage sensing device for an
analog input Correct answer-The current sensing device is less Susceptible to noise
