Industrial Maintenance Technician Test
Which device do you use to measure voltage? - ANSWER- Multi Meter
If you were asked to check out the I/O card on a plc, which card would you look at? -
ANSWER- Input Card
What does the term current refer to while dealing with electricity? - ANSWER- Amps
On a hydraulic pump if you were told the pump is cavitating, what would you check for?
- ANSWER- Low fluid in the tank
In a 480 volt three phase system, what would your meter read if you went from one leg
to ground? - ANSWER- 277
WHICH TOOL IS USED WHEN MEASURING SCREW PITCH - ANSWER- Thread
Gauge
What is a circuit breaker? - ANSWER- an automatically operated electrical switch
designed to protect an electrical circuit from damage caused by overload or short circuit.
What does a D.P.S.T. switch refer to? - ANSWER- double pole single throw
How many teeth are on a 40B12 sprocket? - ANSWER- 12
The BCD equivalent of 1247 converts to_____. - ANSWER- 0001 0010 0100 0111
What is the binary value of the following terms: Word and Nibble - ANSWER- 16 digit
and 4 digit
What type of programming is used by PLCs. - ANSWER- ladder logic
What is the Octal and Hexadecimal= 0-9,A,B,C,D,E,F equivalent for the decimal
numbers 1-15 - ANSWER- 0-7, 10-17, 20... and 0-9,A,B,C,D,E,F
Typical BCD input devices include ____. - ANSWER- thumbwheel switches
BCD code stands for _____. - ANSWER- binary coded decimal
The decimal 1000 has a Weighted Value Position of ______. - ANSWER- 3
If in binary a zero signifies an OFF state a one signifies____________. - ANSWER- an
ON state
How many symbols are in the octal number system? - ANSWER- 8
, To convert from binary to octal, you select bits in groups of ____ - ANSWER- 3
A register or word is composed of ____. - ANSWER- sixteen bits or two bytes.
The two basic sections of a PLC are the - ANSWER- the central processing unit and the
input/output system
State the primary sections of PLCs . - ANSWER- Input modules, (CPU) Central
Processing Unit, Output modules, Programming device, Operator Interface Device
PLC Input modules convert_______________ - 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"? - ANSWER-
Zener diode
The SCR is equivalent to what electronic device? - ANSWER- thyristor
What does the PLC Central Processing unit ( CPU) do? - 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 - 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? - 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_______________ - ANSWER- either ON or OFF. High or Low
Pushbuttons, toggle, switches, limit switches, proximity switches, and relay contacts are
all examples of______________ - ANSWER- devices that are often connected to PLC
discrete inputs.
Solenoids, relay and contactor coils, and indicator lamps are examples of______ -
ANSWER- devices often connected to PLC discrete outputs.
In the on condtion, a discrete inout or output is represented internal to the PLC
as_______ - ANSWER- a logic 1
Which device do you use to measure voltage? - ANSWER- Multi Meter
If you were asked to check out the I/O card on a plc, which card would you look at? -
ANSWER- Input Card
What does the term current refer to while dealing with electricity? - ANSWER- Amps
On a hydraulic pump if you were told the pump is cavitating, what would you check for?
- ANSWER- Low fluid in the tank
In a 480 volt three phase system, what would your meter read if you went from one leg
to ground? - ANSWER- 277
WHICH TOOL IS USED WHEN MEASURING SCREW PITCH - ANSWER- Thread
Gauge
What is a circuit breaker? - ANSWER- an automatically operated electrical switch
designed to protect an electrical circuit from damage caused by overload or short circuit.
What does a D.P.S.T. switch refer to? - ANSWER- double pole single throw
How many teeth are on a 40B12 sprocket? - ANSWER- 12
The BCD equivalent of 1247 converts to_____. - ANSWER- 0001 0010 0100 0111
What is the binary value of the following terms: Word and Nibble - ANSWER- 16 digit
and 4 digit
What type of programming is used by PLCs. - ANSWER- ladder logic
What is the Octal and Hexadecimal= 0-9,A,B,C,D,E,F equivalent for the decimal
numbers 1-15 - ANSWER- 0-7, 10-17, 20... and 0-9,A,B,C,D,E,F
Typical BCD input devices include ____. - ANSWER- thumbwheel switches
BCD code stands for _____. - ANSWER- binary coded decimal
The decimal 1000 has a Weighted Value Position of ______. - ANSWER- 3
If in binary a zero signifies an OFF state a one signifies____________. - ANSWER- an
ON state
How many symbols are in the octal number system? - ANSWER- 8
, To convert from binary to octal, you select bits in groups of ____ - ANSWER- 3
A register or word is composed of ____. - ANSWER- sixteen bits or two bytes.
The two basic sections of a PLC are the - ANSWER- the central processing unit and the
input/output system
State the primary sections of PLCs . - ANSWER- Input modules, (CPU) Central
Processing Unit, Output modules, Programming device, Operator Interface Device
PLC Input modules convert_______________ - 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"? - ANSWER-
Zener diode
The SCR is equivalent to what electronic device? - ANSWER- thyristor
What does the PLC Central Processing unit ( CPU) do? - 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 - 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? - 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_______________ - ANSWER- either ON or OFF. High or Low
Pushbuttons, toggle, switches, limit switches, proximity switches, and relay contacts are
all examples of______________ - ANSWER- devices that are often connected to PLC
discrete inputs.
Solenoids, relay and contactor coils, and indicator lamps are examples of______ -
ANSWER- devices often connected to PLC discrete outputs.
In the on condtion, a discrete inout or output is represented internal to the PLC
as_______ - ANSWER- a logic 1
