The difference between the cut-out and cut-in points of a control is known as:
A) Spread. B) Range. C) Differential. D) Setpoint.
C
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Answer the following statement(s) true (T) or false (F)
The vent for a pneumatic ejector must be vented separately to the outdoors.
A ____ is a flat disk with a center hole to allow a fastener to pass through it.
A. washer B. set screw C. self-tapping screw D. rivet
In the trickling filter process
a. primary effluent fIows over stones coated with microorganisms b. raw sewage flows over stones coated with purifying chemicals c. sewage is mixed with flocs of microorganisms and then filtered d. secondary effluent trickles through a sand filter to "polish" it e. none of the above
Why are the insulated water tanks for heat pump systems referred to as "buffer" tanks?
What will be an ideal response?