Plc Logic Practice Quiz | Plc Logic

Q: In a ladder diagram, what does a normally open contact represent?

A contact that is open when the input signal is FALSE. — A normally open contact is open (not conducting) when the input signal is false (0) and closes (conducts) when the input signal is true (1).

Q: What is the function of an output coil in a ladder diagram?

To control a physical device. — Output coils control physical devices like motors, lights, and valves based on the logic of the program.

Q: Which of the following Boolean operations is represented by a series connection of contacts in a ladder diagram?

AND — A series connection of contacts implements an AND operation. All contacts in the series must be closed for the rung to be true.

Q: What does the term 'rung' refer to in a ladder diagram?

A horizontal line containing the logic instructions. — A rung is a horizontal line containing the input conditions and output actions that define a specific logic operation.

Q: What is a common use for a PLC?

Controlling industrial processes. — PLCs are primarily used to control industrial processes such as manufacturing, automation, and machinery control.

Question 1 of 5

In a ladder diagram, what does a normally open contact represent?

A normally open contact is open (not conducting) when the input signal is false (0) and closes (conducts) when the input signal is true (1).

Question 2 of 5

What is the function of an output coil in a ladder diagram?

Output coils control physical devices like motors, lights, and valves based on the logic of the program.

Question 3 of 5

Which of the following Boolean operations is represented by a series connection of contacts in a ladder diagram?

A series connection of contacts implements an AND operation. All contacts in the series must be closed for the rung to be true.

Question 4 of 5

What does the term 'rung' refer to in a ladder diagram?

A rung is a horizontal line containing the input conditions and output actions that define a specific logic operation.

Question 5 of 5

What is a common use for a PLC?

PLCs are primarily used to control industrial processes such as manufacturing, automation, and machinery control.

Automation