Electric Motor Control UPDATED ACTUAL and Correct Answers
Question: What are the four components of a ladder diagram?
LAP.04
Answer:
• Power Supply
• Conductors
• Input Devices
• Output Devices
Question: What are the six basic rules that determine how a ladder diagram is drawn?
LAP.04
Answer:
• All Components Labeled
• All Conductors Numbered
• All Lines Numbered
• Control Devices Only
• Only One Load Per Line
• Output Devices Located on Right
Question: Describe how to determine the operation of a circuit given a ladder diagram.
LAP.04
Answer:
Left to Right, Top to Bottom.
The best method for reading a ladder diagram is to start at the upper left of the diagram at the first
input on the first
line, then work your way across that line before moving down to the first input on the next line.
Question: Explain how to wire switches to form an AND logic circuit and provide a
real-world application.
LAP.04
Answer:
• An AND logic circuit can be made by placing two or more Normally Open (N.O.) switches wired in
series.
• Two-Hand Circuit
, Question: Explain how to wire switches to form an OR logic circuit and provide a
real-world application.
LAP.04
Answer:
• An OR logic circuit can be formed by two or more Normally Open (N.O.) switches wired in Parallel.
• Remote start switch for a machine.
Question: Explain how to wire switches to form a NOT logic circuit and provide a
real-world application.
LAP.04
Answer:
• NOT logic can be formed by the use of a single Normally Closed (N.C.) switch.
• Stop Pushbutton
Question: Explain how to wire switches to form a NOR logic circuit and provide a
real-world application.
LAP.04
Answer:
• NOR logic can be made of two or more Normally Closed (N.C.) switches wired in series.
• E-Stop in a Wind Turbine
Question: Explain how to wire switches to form a NAND logic circuit and provide a
real-world application.
LAP.04
Answer:
• NAND logic can consist of two or more Normally Closed (N.C.) input switches wired in Parallel.
• The Interior light circuit in a car.
Question: Give the three applications of a Control Relay.
LAP.05
Answer:
• Energizing Larger Output Devices
• Performing Control Logic
• Memory Logic
Question: As an industry standard, how do you reverse direction on a 3Ø Motor?
Answer:
Question: What are the four components of a ladder diagram?
LAP.04
Answer:
• Power Supply
• Conductors
• Input Devices
• Output Devices
Question: What are the six basic rules that determine how a ladder diagram is drawn?
LAP.04
Answer:
• All Components Labeled
• All Conductors Numbered
• All Lines Numbered
• Control Devices Only
• Only One Load Per Line
• Output Devices Located on Right
Question: Describe how to determine the operation of a circuit given a ladder diagram.
LAP.04
Answer:
Left to Right, Top to Bottom.
The best method for reading a ladder diagram is to start at the upper left of the diagram at the first
input on the first
line, then work your way across that line before moving down to the first input on the next line.
Question: Explain how to wire switches to form an AND logic circuit and provide a
real-world application.
LAP.04
Answer:
• An AND logic circuit can be made by placing two or more Normally Open (N.O.) switches wired in
series.
• Two-Hand Circuit
, Question: Explain how to wire switches to form an OR logic circuit and provide a
real-world application.
LAP.04
Answer:
• An OR logic circuit can be formed by two or more Normally Open (N.O.) switches wired in Parallel.
• Remote start switch for a machine.
Question: Explain how to wire switches to form a NOT logic circuit and provide a
real-world application.
LAP.04
Answer:
• NOT logic can be formed by the use of a single Normally Closed (N.C.) switch.
• Stop Pushbutton
Question: Explain how to wire switches to form a NOR logic circuit and provide a
real-world application.
LAP.04
Answer:
• NOR logic can be made of two or more Normally Closed (N.C.) switches wired in series.
• E-Stop in a Wind Turbine
Question: Explain how to wire switches to form a NAND logic circuit and provide a
real-world application.
LAP.04
Answer:
• NAND logic can consist of two or more Normally Closed (N.C.) input switches wired in Parallel.
• The Interior light circuit in a car.
Question: Give the three applications of a Control Relay.
LAP.05
Answer:
• Energizing Larger Output Devices
• Performing Control Logic
• Memory Logic
Question: As an industry standard, how do you reverse direction on a 3Ø Motor?
Answer:
