TPC Electrical Level 3 Test: Questions & Solutions

TPC Electrical Level 3 Test: Questions &
Solutions 2026\2027
The permanent joining of motor frames, conduit, control boxes, and other
e. e. e. e. e. e. e. e. e. e.


metal parts not intended to carry current in normal operations is known as
e. e. e. e. e. e. e. e. e. e. e. e. e.




• equipment bonding e.


• equipment grounding e.


• short circuiting e.


• system grounding Correct answer - equipment bonding
e. e. e. e. e.




Autotransformer starting is used where the minimum motor current e. e. e. e. e. e. e. e.


must be reduced with a minimum sacrifice of motor starting torque.
e. e. e. e. e. e. e. e. e. e. e.




• full-load
• Inrush
• locked-rotor
• running Correct answer - inrush e. e. e.




The function of a float switch is to indicate
e. e. e. e. e. e. e. e.




• flow
• liquid level e.


• movement
• pressure Correct answer - liquid level e. e. e. e.




The minimum potential difference that will cause the armature to seat
e. e. e. e. e. e. e. e. e. e.


against the pole faces of a relay coil is called the.
e. e. e. voltage e. e. e. e. e. e. e. e. e.




• drop-out
• pick-up
• seal-in
• seat-in Correct answer - seal e. e. e.




in What is a protocol?
e. e. e. e. e.




• generic communication methods e. e.

,• similar communication methods e. e.


• unique communication methods e. e.


• polite communication methods Correct answer - unique communication
e. e. e. e. e. e.


methods
e.




In a pneumatic circuit, leakage of air during the actuating part of the cycle
e. e. e. e. e. e. e. e. e. e. e. e. e.




• can usually be ignored e. e. e.


• indicates the device will fail soon e. e. e. e. e.


• is dangerous and must be stopped
e. e. e. e. e.


• prevents normal operation Correct answer - can usually be
e. e. e. e. e. e. e.




ignored A two-parallel-Y connection
e. e. e. e.




• requires a higher potential difference than a series-Y connection
e. e. e. e. e. e. e. e.


• requires a lower potential difference than a series-Y connection
e. e. e. e. e. e. e. e.


• is the lower-voltage connection in a dual-voltage, delta-connected motor
e. e. e. e. e. e. e. e.


• is the higher voltage connection in a dual-voltage, delta-connected
e. e. e. e. e. e. e. e.


motor Correct answer - requires a lower potential difference than a
e. e. e. e. e. e. e. e. e. e. e.


series-Y connection
e. e.




Another name for the mounting enclosure is what?
e. e. e. e. e. e. e.




• fixed
• modular
• rасk
• slots Correct answer - rack e. e. e.




An undercurrent relay functions when the current reaches a(n)
e. e. e. e. e. e. e. e.




• lower limit e.


• upper limit e.


• value between the upper and lower limits
e. e. e. e. e. e.


• value outside the upper and lower limits Correct answer - lower limit
e. e. e. e. e. e. e. e. e. e.




e. The first step in developing a PLC system to meet given specifications
e. e. e. e. e. e. e. e. e. e. e.




e. is

• assembling the documentation e. e.


• drawing the hardware e. e.

, • sizing the system e. e.


• writing the software e. e. Correct answer - sizing the system e. e. e. e. e.




A relay that has "dogs" located directly above the operating bar is called a
e. e. e. e. e. e. e. e. e. e. e. e. e. e.


relay
e.




• frame
• latching
• power
• reed Correct answer - latching e. e. e.




Most reversing starters with low-voltage remote pushbuttons are all of the
e. e. e. e. e. e. e. e. e. e.


following EXCEPT
e. e.




• electrically interconnected e.


• electrically interlocked e.


• mechanically interconnected e.


• mechanically interlocked Correct answer - mechanically interconnected
e. e. e. e. e.




Which of the following is usually associated with a PLC counter
e. e. e. e. e. e. e. e. e. e. e.




instruction?
e.




• preset register e.


• time base e.


• preset time e.


• accumulated time e. Correct answer - preset register e. e. e. e.




Which of the following is the most common cause of a program problem?
e. e. e. e. e. e. e. e. e. e. e. e.




• Changes made to the original program
e. e. e. e. e.


• Power outage e.


• Sensor replacement e.


• Virus Correct answer - Changes made to the original program e. e. e. e. e. e. e. e.




Conductors that supply two or more motors must be able to carry at least
e. e. e. e. e. e. e. e. e. e. e. e. e.


% of the full-load current rating of the largest motor.
e. e. e. e. e. e. e. e. e.




• 75
• 100
• 125