Download PASSEMALL Prep app now
Scan QR code or get instant email to install app
Question:
Comments
Your email address will not be published. Required fields are marked *
Comment *
Name*
Email*
URL
Save my name, email, and website in this browser for the next time I comment.
Which of the following is common boiler fuel for commercial buildings:
Natural gas
As the load on the system decreases, the regulating valve will _____ the flow of water until it reaches a point where the heat rejection rate of the condenser balances the system load
Decrease
Most boilers used in HVAC applications are low-pressure boilers:
True
Increasing excess air by 10% may only impact boiler efficiency by about:
1%
Condenser is a heat exchanger device which rejects heat from air or water to the refrigerant:
False
As the outdoor air temperature is reduced, Condenser pressure will be _______ :
Decreased
Firetube boilers are available in sizes ranging from ______ BTU input:
500,000 to 75,000,000
In a Firetube boiler, hot gases of combustion flow through a series of tubes surrounded by water:
Variable speed drives are used for controlling the capacity of an air-cooled condenser:
Which of the following condenser requires minimum maintenance:
Air cooled condenser
Operating water temperatures for hot water boilers are limited to ______ :
250 degrees F
Non-condensing boilers typically operate in the range of ______ combustion efficiency
75% – 85%
If the outdoor air is dry, the final water temperature that is leaving the cooling tower can be _____ to the ambient dry-bulb temperature.
Considerably lower
As per ASME and pressure vessel codal requirements, Low-pressure boilers are limited to a maximum working pressure of _____ psig for steam:
15
Comments