What is the AHRI "A" performance testing condition for air cooled air conditioning equipment?
A) 90°F outside ambient, 85°F indoor dry bulb, 70°F indoor wet bulb
B) 95°F outside ambient, 75°F indoor dry bulb, 75°F indoor wet bulb
C) 95°F outside ambient, 80°F indoor dry bulb, 68°F indoor wet bulb
D) 100°F outside ambient, 75°F indoor dry bulb, 72°F indoor wet bulb
C
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What problem can be caused by a change in the composition of the fuel?
A. Overheating B. Power outage C. Increased soot deposits D. Formation of scale in the tubes
More than one evaporator coil circuit is used when ____.
A. the evaporator is located outside the conditioned area B. there would be excessive refrigerant pressure drop in the coil circuit C. a distributor would not be practical D. a slant coil is at an angle more than 60°
If water in a cup is 10°C and the cup is 20°C, which way will the heat travel according to the second law of thermodynamics?
A) Heat will travel in each of the two directions. B) Heat will not travel from one object to another. C) Heat will travel from the water to the cup. D) Heat will travel from the cup to the water.
____ provide complementary information to that given by graphically representing and dimensioning screw threads on a drawing.
A. Thread attachments B. Thread notes C. Thread references D. Thread codes