Hvac Exam 3 Questions And Answers
With Verified Solutions Latest Updated
2025
What is the purpose of an expansion tank?
Remove air from the water
Filter the water
Allow for the introduction of make-up water
Provide high and low limits on pressure
Allow the water to cool - ANSWER✔✔Provide high and low limits on pressure
T or F
A boiler room should be maintained at a negative pressure with respect to
atmospheric conditions - ANSWER✔✔False
What is the name of the device used to remove foreign materials from a piping
system?
Union
Pressure trap
Flange
Tee
Strainer - ANSWER✔✔Strainer
T or F
Steam flows in a piping system due to the action of a pump or a compressor -
ANSWER✔✔False
T or F
From an energy cost point of view, electric energy is always less expensive than
gas or oil - ANSWER✔✔False
The condenser water piping to a cooling tower is an example of what type of
piping system?
, Open
Closed
Constrained
DX (direct expansion)
Evaporative - ANSWER✔✔Open
T or F
the solubility of air in water decreases as the water temperature rises -
ANSWER✔✔True
What is the name of the device used to separate and remove condensate from
steam piping and heat transfer devices?
Steam trap
Air separator
Suction diffuser
Expansion tank
Vacuum breaker - ANSWER✔✔Steam trap
What is the purpose of a boiler burner
Reduce concentration of dissolved solids
Remove undissolved air
Mix fuel and air, then ignite
Accumulate fuel prior to ignition
Reduce pressure of fuel - ANSWER✔✔Mix fuel and air, then ignite
Boilers that have water on the outside of the tube in the boiler shell and has the
products of combustion inside the tubes is referred to by what name
Firetube
Watertube
Scotch Marine
Pulse - ANSWER✔✔Firetube
T or F
With Verified Solutions Latest Updated
2025
What is the purpose of an expansion tank?
Remove air from the water
Filter the water
Allow for the introduction of make-up water
Provide high and low limits on pressure
Allow the water to cool - ANSWER✔✔Provide high and low limits on pressure
T or F
A boiler room should be maintained at a negative pressure with respect to
atmospheric conditions - ANSWER✔✔False
What is the name of the device used to remove foreign materials from a piping
system?
Union
Pressure trap
Flange
Tee
Strainer - ANSWER✔✔Strainer
T or F
Steam flows in a piping system due to the action of a pump or a compressor -
ANSWER✔✔False
T or F
From an energy cost point of view, electric energy is always less expensive than
gas or oil - ANSWER✔✔False
The condenser water piping to a cooling tower is an example of what type of
piping system?
, Open
Closed
Constrained
DX (direct expansion)
Evaporative - ANSWER✔✔Open
T or F
the solubility of air in water decreases as the water temperature rises -
ANSWER✔✔True
What is the name of the device used to separate and remove condensate from
steam piping and heat transfer devices?
Steam trap
Air separator
Suction diffuser
Expansion tank
Vacuum breaker - ANSWER✔✔Steam trap
What is the purpose of a boiler burner
Reduce concentration of dissolved solids
Remove undissolved air
Mix fuel and air, then ignite
Accumulate fuel prior to ignition
Reduce pressure of fuel - ANSWER✔✔Mix fuel and air, then ignite
Boilers that have water on the outside of the tube in the boiler shell and has the
products of combustion inside the tubes is referred to by what name
Firetube
Watertube
Scotch Marine
Pulse - ANSWER✔✔Firetube
T or F
