What two pressures are created by air moving through the duct system?
A) Barometric pressure and atmospheric pressure
B) Velocity pressure and static pressure
C) Supply pressure and return pressure
D) Air pressure and friction pressure
B
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What is the proper spacing between lines?
What will be an ideal response?
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____ pieces are prefinished boards used to enclose narrow spaces between cabinets.
A. Shelf B. Variety C. Filler D. Valance
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A normal evaporator superheat at the evaporator outlet in a standard efficiency air-conditioning system operating under design conditions will be ____°F.
A. 10 B. 15 C. 20 D. 25
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A secondary standard device ____.
A. should be 10 times more accurate than the transmitter being tested B. only needs to be half as accurate as the transmitter being tested
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