A control loop is:
A) a series of electric switches designed to control a process.
B) a sensing element, transmitter, controller, transducer, and control valve.
C) a collection of instruments that work together to automatically control a process.
D) b & c
Correct Answer:
Verified
Q39: A check valve is:
A) an automatic valve
B)
Q40: Automatic valves can be used to control:
A)
Q41: Places a moveable metal gate in the
Q42: A term used to describe temperature changes
Q43: Ball valves are most closely related to:
A)
Q44: The _ in a gate valve represents
Q45: Globe valves are primarily used for:
A) throttling
Q46: The difference between the initial lift-off pressure
Q47: An angle valve is classified as a:
A)
Q48: Industrial air is used primarily to operate:
A)
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