TPC ELECTRICAL LEVEL 3 TEST:
QUESTIONS & CORRECT
SOLUTIONS
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 Right Ans - equipment bonding
Autotransformer starting is used where the minimum motor _____ current must
be reduced with a minimum sacrifice of motor starting torque.
• full-load
• Inrush
• locked-rotor
• running Right Ans - inrush
The function of a float switch is to indicate
• flow
• liquid level
• movement
• pressure Right Ans - 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 Right Ans - seal in
,What is a protocol?
• generic communication methods
• similar communication methods
• unique communication methods
• polite communication methods Right Ans - 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 Right Ans - 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
Right Ans - requires a lower potential difference than a series-Y connection
Another name for the mounting enclosure is what?
• fixed
• modular
• rасk
• slots Right Ans - 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 Right Ans - 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 Right Ans - sizing the system
A relay that has "dogs" located directly above the operating bar is called a ____
relay
• frame
• latching
• power
• reed Right Ans - latching
Most Reversing Starters With Low-Voltage Remote Pushbuttons Are All Of
The Following EXCEPT
• electrically interconnected
• electrically interlocked
• mechanically interconnected
• mechanically interlocked Right Ans - mechanically interconnected
Which Of The Following Is Usually Associated With A PLC Counter
Instruction?
• preset register
• time base
• preset time
• accumulated time Right Ans - 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 Right Ans - 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
• 150 Right Ans - 125
QUESTIONS & CORRECT
SOLUTIONS
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 Right Ans - equipment bonding
Autotransformer starting is used where the minimum motor _____ current must
be reduced with a minimum sacrifice of motor starting torque.
• full-load
• Inrush
• locked-rotor
• running Right Ans - inrush
The function of a float switch is to indicate
• flow
• liquid level
• movement
• pressure Right Ans - 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 Right Ans - seal in
,What is a protocol?
• generic communication methods
• similar communication methods
• unique communication methods
• polite communication methods Right Ans - 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 Right Ans - 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
Right Ans - requires a lower potential difference than a series-Y connection
Another name for the mounting enclosure is what?
• fixed
• modular
• rасk
• slots Right Ans - 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 Right Ans - 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 Right Ans - sizing the system
A relay that has "dogs" located directly above the operating bar is called a ____
relay
• frame
• latching
• power
• reed Right Ans - latching
Most Reversing Starters With Low-Voltage Remote Pushbuttons Are All Of
The Following EXCEPT
• electrically interconnected
• electrically interlocked
• mechanically interconnected
• mechanically interlocked Right Ans - mechanically interconnected
Which Of The Following Is Usually Associated With A PLC Counter
Instruction?
• preset register
• time base
• preset time
• accumulated time Right Ans - 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 Right Ans - 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
• 150 Right Ans - 125
