How is a velometer used to determine the CFM at a supply register?
A) The average air velocity is multiplied by the free area of the register.
B) The average air velocity is multiplied by 1.08.
C) The average air velocity is multiplied by the face area of the register.
D) The average air velocity is the same thing as CFM.
A
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Fill in the blank(s) with the appropriate word(s).
The stems on manual stem service valves should be turned with:
A) A refrigeration service valve wrench only. B) Either an adjustable jaw wrench or a pair of pliers. C) Either a refrigeration service valve wrench or a pair of pliers. D) Either a refrigeration service valve wrench or an adjustable jaw wrench.
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What will be an ideal response?
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A. one pulse after a signal is applied to the input B. a continuous square wave after power is applied