TPC Electrical Level 3 Test:
Questions & Solutions 2026\2027
The permanent joining of motor frames, conduit, control boxes, and
other metal parts not intended to carry current in normal operations is
known as
• equipment bonding
• equipment grounding
• short circuiting
• system grounding Correct answer - equipment bonding
Autotransformer starting is used where the minimum motor
curren
t must be reduced with a minimum sacrifice of motor starting
torque.
• full-load
• Inrush
• locked-rotor
• running Correct answer - inrush
The function of a float switch is to indicate
• flow
• liquid level
• movement
• pressure Correct answer - liquid level
The minimum potential difference that will cause the armature to seat
against the pole faces of a relay coil is called the. voltage
• drop-out
• pick-up
• seal-in
• seat-in Correct answer - seal
in What is a protocol?
• generic communication methods
,• similar communication methods
• unique communication methods
• polite communication methods Correct answer - unique
communication methods
In a pneumatic circuit, leakage of air during the actuating part of the cycle
• can usually be ignored
• indicates the device will fail soon
• is dangerous and must be stopped
• prevents normal operation Correct answer - can usually be
ignored A two-parallel-Y connection
• requires a higher potential difference than a series-Y connection
• requires a lower potential difference than a series-Y connection
• is the lower-voltage connection in a dual-voltage, delta-connected motor
• is the higher voltage connection in a dual-voltage, delta-connected
motor Correct answer - requires a lower potential difference than a
series-Y connection
Another name for the mounting enclosure is what?
• fixed
• modular
• rасk
• slots Correct answer - rack
An undercurrent relay functions when the current reaches a(n)
• lower limit
• upper limit
• value between the upper and lower limits
• value outside the upper and lower limits Correct answer - lower
limit The first step in developing a PLC system to meet given
specifications is
• assembling the documentation
• drawing the hardware
, • sizing the system
• writing the software Correct answer - sizing the system
A relay that has "dogs" located directly above the operating bar is called
a
relay
• frame
• latching
• power
• reed Correct answer - latching
Most reversing starters with low-voltage remote pushbuttons are all of
the following EXCEPT
• electrically interconnected
• electrically interlocked
• mechanically interconnected
• mechanically interlocked Correct answer - mechanically
interconnected Which of the following is usually associated with a PLC
counter instruction?
• preset register
• time base
• preset time
• accumulated time Correct answer - preset register
Which of the following is the most common cause of a program problem?
• Changes made to the original program
• Power outage
• Sensor replacement
• Virus Correct answer - Changes made to the original program
Conductors that supply two or more motors must be able to carry at least
% of the full-load current rating of the largest motor.
• 75
• 100
• 125
Questions & Solutions 2026\2027
The permanent joining of motor frames, conduit, control boxes, and
other metal parts not intended to carry current in normal operations is
known as
• equipment bonding
• equipment grounding
• short circuiting
• system grounding Correct answer - equipment bonding
Autotransformer starting is used where the minimum motor
curren
t must be reduced with a minimum sacrifice of motor starting
torque.
• full-load
• Inrush
• locked-rotor
• running Correct answer - inrush
The function of a float switch is to indicate
• flow
• liquid level
• movement
• pressure Correct answer - liquid level
The minimum potential difference that will cause the armature to seat
against the pole faces of a relay coil is called the. voltage
• drop-out
• pick-up
• seal-in
• seat-in Correct answer - seal
in What is a protocol?
• generic communication methods
,• similar communication methods
• unique communication methods
• polite communication methods Correct answer - unique
communication methods
In a pneumatic circuit, leakage of air during the actuating part of the cycle
• can usually be ignored
• indicates the device will fail soon
• is dangerous and must be stopped
• prevents normal operation Correct answer - can usually be
ignored A two-parallel-Y connection
• requires a higher potential difference than a series-Y connection
• requires a lower potential difference than a series-Y connection
• is the lower-voltage connection in a dual-voltage, delta-connected motor
• is the higher voltage connection in a dual-voltage, delta-connected
motor Correct answer - requires a lower potential difference than a
series-Y connection
Another name for the mounting enclosure is what?
• fixed
• modular
• rасk
• slots Correct answer - rack
An undercurrent relay functions when the current reaches a(n)
• lower limit
• upper limit
• value between the upper and lower limits
• value outside the upper and lower limits Correct answer - lower
limit The first step in developing a PLC system to meet given
specifications is
• assembling the documentation
• drawing the hardware
, • sizing the system
• writing the software Correct answer - sizing the system
A relay that has "dogs" located directly above the operating bar is called
a
relay
• frame
• latching
• power
• reed Correct answer - latching
Most reversing starters with low-voltage remote pushbuttons are all of
the following EXCEPT
• electrically interconnected
• electrically interlocked
• mechanically interconnected
• mechanically interlocked Correct answer - mechanically
interconnected Which of the following is usually associated with a PLC
counter instruction?
• preset register
• time base
• preset time
• accumulated time Correct answer - preset register
Which of the following is the most common cause of a program problem?
• Changes made to the original program
• Power outage
• Sensor replacement
• Virus Correct answer - Changes made to the original program
Conductors that supply two or more motors must be able to carry at least
% of the full-load current rating of the largest motor.
• 75
• 100
• 125
