WorksheetsInstrumentation – Chapter 18 – Test Bank
Total questions: 6
Worksheet time: 3mins
Which of the following is a conditional logic in which a process is either fully engaged or not engaged at all?
Boolean logic
And/or
If/then
On/off
Why is it important to have accurate PLC ladder drawings?
Technicians did not have the training to modify diagrams.
Modifications were time-consuming.
To avoid injury.
What do PLCs allow?
Changes to the shelf position to be recorded automatically
Changes to MCCs to be recorded automatically
Changes to DCS to be recorded automatically
Changes to ladder diagrams to be recorded automatically
What is and/or logic used to control?
A process in which either one or both variables exist
A process so that the process is either fully engaged or not engaged at all
A process in which multiple conditions are present at once
A process in which one condition leads to the next
Which of the following rely heavily on PLCs?
Washing machines
Car horns
Air conditioners
Emergency shutdown systems
What is the most commonly used method for interfacing with a PLC?
Function block diagrams
Structured text
Ladder diagrams
Instruction list
