Industrial Maintenance Technician Test verified with correct
answers 2026/2027 version
Typical BCD input devices include ____. - correct answer >>>thumbwheel switches
BCD code stands for _____. - correct answer >>>binary coded decimal
The decimal 1000 has a Weighted Value Position of ______. - correct answer >>>3
If in binary a zero signifies an OFF state a one signifies____________. - correct answer
>>>an ON state
How many symbols are in the octal number system? - correct answer >>>8
To convert from binary to octal, you select bits in groups of ____ - correct answer >>>3
A register or word is composed of ____. - correct answer >>>sixteen bits or two bytes.
The two basic sections of a PLC are the - correct answer >>>the central processing unit
and the input/output system
State the primary sections of PLCs . - correct answer >>>Input modules, (CPU) Central
Processing Unit, Output modules, Programming device, Operator Interface Device
PLC Input modules convert_______________ - correct answer >>>signals(analog or
discrete/digital) provided by various switches and sensors into logic that can be used by
the CPU
What solid state device is associated with the term "avalanche effect"? - correct answer
>>>Zener diode
The SCR is equivalent to what electronic device? - correct answer >>>thyristor
What does the PLC Central Processing unit ( CPU) do? - correct answer >>>evaluates
the status of inputs, outputs, and other variables as it excutes a stored program. The
CPU then sends signals to update the status of outputs.
Describe the function of Output Modules - correct answer >>>Output Modules convert
control signals from the CPU into digital or analog values that can be used to control
various outputs
What is the Programming Device used for? - correct answer >>>it is used to enter or
change the PLCs program or to monitor or change stored values. Once entered the
program and associated variables are stored in the CPU
, Discrete inputs and outputs, also referred to as digital inputs and outputs
are_______________ - correct answer >>>either ON or OFF. High or Low
Pushbuttons, toggle, switches, limit switches, proximity switches, and relay contacts are
all examples of______________ - correct answer >>>devices that are often connected
to PLC discrete inputs.
Solenoids, relay and contactor coils, and indicator lamps are examples of______ -
correct answer >>>devices often connected to PLC discrete outputs.
In the on condtion, a discrete inout or output is represented internal to the PLC
as_______ - correct answer >>>a logic 1
: In the off condition, a discrete input or output is represented as_____ - correct answer
>>>a logic 0
Analog Inputs/Outputs are____________ - correct answer >>>continuous, variable
signals
Typical analog signals vary from ________ - correct answer >>>4 to 20 milliamps
Advantages of PLCs are____________ - correct answer >>>Smaller size, easier and
faster system changes, integrated diagnostics, immediate documentation.
The proximity switch _________ - correct answer >>>senses the approach of a metallic
machine part either by a magnetic or high frequency electromagnetic field. when objects
are near by
Calculate the synchronous speed of a rotating magnetic field created by the stator given
the following information: # of poles: 4 frequency: 60Hz phases: 2 - correct answer
>>>srpm=120xF/P 120X60/4=1800srpm
Four resistors having a value of 100 ohms each are connected in parallel. What is the
total resistance of this circuit? - correct answer >>>1/100 + 1/100 +1/100 + 1/100= 25
ohms
Identify ohms law - correct answer >>>V= IR
What is the purpose of the test equipment Galvanometer? - correct answer >>>Type of
Ammeter
When using a multimeter to measure an output voltage, you should ensure that the dc
voltage component does not exceed what maximum voltage? - correct answer
>>>.707% of full deflection
answers 2026/2027 version
Typical BCD input devices include ____. - correct answer >>>thumbwheel switches
BCD code stands for _____. - correct answer >>>binary coded decimal
The decimal 1000 has a Weighted Value Position of ______. - correct answer >>>3
If in binary a zero signifies an OFF state a one signifies____________. - correct answer
>>>an ON state
How many symbols are in the octal number system? - correct answer >>>8
To convert from binary to octal, you select bits in groups of ____ - correct answer >>>3
A register or word is composed of ____. - correct answer >>>sixteen bits or two bytes.
The two basic sections of a PLC are the - correct answer >>>the central processing unit
and the input/output system
State the primary sections of PLCs . - correct answer >>>Input modules, (CPU) Central
Processing Unit, Output modules, Programming device, Operator Interface Device
PLC Input modules convert_______________ - correct answer >>>signals(analog or
discrete/digital) provided by various switches and sensors into logic that can be used by
the CPU
What solid state device is associated with the term "avalanche effect"? - correct answer
>>>Zener diode
The SCR is equivalent to what electronic device? - correct answer >>>thyristor
What does the PLC Central Processing unit ( CPU) do? - correct answer >>>evaluates
the status of inputs, outputs, and other variables as it excutes a stored program. The
CPU then sends signals to update the status of outputs.
Describe the function of Output Modules - correct answer >>>Output Modules convert
control signals from the CPU into digital or analog values that can be used to control
various outputs
What is the Programming Device used for? - correct answer >>>it is used to enter or
change the PLCs program or to monitor or change stored values. Once entered the
program and associated variables are stored in the CPU
, Discrete inputs and outputs, also referred to as digital inputs and outputs
are_______________ - correct answer >>>either ON or OFF. High or Low
Pushbuttons, toggle, switches, limit switches, proximity switches, and relay contacts are
all examples of______________ - correct answer >>>devices that are often connected
to PLC discrete inputs.
Solenoids, relay and contactor coils, and indicator lamps are examples of______ -
correct answer >>>devices often connected to PLC discrete outputs.
In the on condtion, a discrete inout or output is represented internal to the PLC
as_______ - correct answer >>>a logic 1
: In the off condition, a discrete input or output is represented as_____ - correct answer
>>>a logic 0
Analog Inputs/Outputs are____________ - correct answer >>>continuous, variable
signals
Typical analog signals vary from ________ - correct answer >>>4 to 20 milliamps
Advantages of PLCs are____________ - correct answer >>>Smaller size, easier and
faster system changes, integrated diagnostics, immediate documentation.
The proximity switch _________ - correct answer >>>senses the approach of a metallic
machine part either by a magnetic or high frequency electromagnetic field. when objects
are near by
Calculate the synchronous speed of a rotating magnetic field created by the stator given
the following information: # of poles: 4 frequency: 60Hz phases: 2 - correct answer
>>>srpm=120xF/P 120X60/4=1800srpm
Four resistors having a value of 100 ohms each are connected in parallel. What is the
total resistance of this circuit? - correct answer >>>1/100 + 1/100 +1/100 + 1/100= 25
ohms
Identify ohms law - correct answer >>>V= IR
What is the purpose of the test equipment Galvanometer? - correct answer >>>Type of
Ammeter
When using a multimeter to measure an output voltage, you should ensure that the dc
voltage component does not exceed what maximum voltage? - correct answer
>>>.707% of full deflection
