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HVAC BOMA Pre-Quiz (website)
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HVAC BOMA Pre-Quiz (website)
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HVAC BOMA Pre-Quiz (website)
Two basic categories of chillers are the _____.
- answer Compression cycle and absorption
The five requirements for comfort are proper
temperature, humidity, filtration, _____. -
answer Circulation
The primary function of an expansion device
is to _____. - answer All of the above (produce
a reduction in the pressure on the liquid
refrigerant, regulate the flow of refrigerant
into the evaporator and lower the boiling
point of the refrigerant far enough below the
temperature of the load to get the needed
heat transfer rate.
,The wet-bulb depression is _____. - answer
The difference between the dry-bulb and wet-
bulb temperatures.
The dew-point temperature is the _____. -
answer Temperature when the moisture
begins to condense out of the air.
How many Btu are required to change one
pound of ice at 20°F to steam at 220°F -
answer 1,304 Btu/h
If an R-12 refrigeration system is operating
with a 25.4 psig suction pressure, what is the
evaporator superheat if the evaporator outlet
temperature is 34°F - answer 9
On an R-11 or R-123 system, the refrigerant
removal process normally starts with the
removal of _____. - answer Liquid refrigerant
The condenser in a refrigeration system _____.
- answer All of the above (desuperheats the
vapor from the compressor, condenses the
vapor from the compressor and subcools the
, liquid refrigerant before it leaves the
condenser)
The human body gives off heat by which of
the following? - answer All of the above
(convection, radiation and conduction)
If the temperature remains constant and the
volume that a gas occupies increases, the
pressure will _____. - answer decrease
Transformers are rated using _____. - answer
Volt-amperes
Measuring velocity pressure in a duct
indicates the _____. - answer Speed at which
the air is moving
A solid material exerts a pressure or force
_____. - answer Downward only
Pure water boils at temperature of 213°F, at
which of the following standard conditions? -
answer 14.967psi
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