How does an air defrost system work?
A) Air from in the store is directed over the evaporator.
B) Hot compressor discharge gas is routed to the evaporator.
C) The superheated gas leaving the evaporator is used to melt the ice.
D) A warm glycol solution is sprayed on the coil.
A
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Following is a list of approximate conversion factors, useful for “back-of-the-envelope” estimates. None of them is exact, but most are accurate to within about ±10%.
? 1(atm) ? 1 bar
? 1(Btu) ?1 kJ
? 1(hp) ? 0.75 kW
? 1(inch) ? 2.5 cm
? 1(lbm) ? 0.5 kg
? 1(mile) ? 1.6 km
? 1(quart) ? 1 liter
? 1(yard) ? 1 m
Conversion Factors
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?The radius of an arc is the distance between its endpoints.
Answer the following statement true (T) or false (F)