BOMA-HVAC Exam Questions With
Correct Answers
The man whose work is considered the real beginning of the science of air-conditioning _____. -
answerWillis Carrier
Psychrometry refers to the relationship between _____ and _____. - answerHumidity; air
The amount of moisture in the air compared t...
Air flow thru a duct has the highest _____. - answer✔Velocity near the center of the duct.
Select the statement which does not apply to the fan laws. - answer✔Static pressure in a duct increases
as the velocity decreases.
Variable air volume system feature is _____. - answer✔Varies the volume of air with space temperature
conditions
Double duct systems are _____. - answer✔?
The purpose of a primary control is to _____. - answer✔Start or stop the system
A pressurestat responds to _____. - answer✔System pressure
The oil safety switch is operated by _____. Oil pressure - answer✔
A low limit control _____. - answer✔?
A high limit control _____. - answer✔?
Limit controls _____. - answer✔Are wired into the circuit in series
A diulating switch is used to _____. - answer✔Change proportional action to two position control.
A ratio relay is used to _____. - answer✔Provide sequence control of more than one actuator.
A proportional control: - answer✔Where a movement from the set point produces a proportional
movement of the actuator
A three way diverting valve: - answer✔has two outlets and one common inlet
Heat will continue to flow between two bodies until they have the same amount of _____. -
answer✔Sensible heat
Heat which causes a change of state is _____. - answer✔Latent heat
The refrigeration effect of a refrigerant is improved by _____. - answer✔Subcooling the liquid.
In the refrigeration cycle, the medium that picks up the heat is the _____. - answer✔refrigerant.
A heat exchanger _____. - answer✔Subcools the liquid refrigerant
Calculations involving heat load of people takes into consideration heat due to _____ and _____. -
answer✔Latent heat; sensible heat
The flow control device used to maintain system temperature is the _____. - answer✔Evaporator
pressure valve
Enthalpy refers to the _____. - answer✔Heat content of the refrigerant
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