HVAC Air Distribution System Questions & Answers 2024.

HVAC Air Distribution System Questions
& Answers 2024.

The lowest pressure level withing an air distribution system is found at the? - CORRECT ANSWER Input
to the blower.



The velocity pressure in a air duct equals the? - CORRECT ANSWER The total pressure minus the static
pressure.



At sea level, every inch of Earth as an absolute pressure of? - CORRECT ANSWER 14.7psi.



Air systems used only for heating usually require_______ systems used for both heating and cooling. -
CORRECT ANSWER Less airflow than.



Forced-air systems designed for cooling require about_______ of airflow per ton of cooling. - CORRECT
ANSWER 400 cfm +_50



Air distribution air systems considered to be high-pressure systems have pressure greater than? -
CORRECT ANSWER 3.5 in W.C.



When a change in the volume airflow in cfm is know, Fan law 1 can be used to calculate the? - CORRECT
ANSWER New value for rpm.



The total pressure loss in an air duct distribution system and its components (excuding the air handler) is
called the? - CORRECT ANSWER External static pressure loss.



Air systems with high sidewalls or cealling air outlets normally are designed to? - CORRECT ANSWER
Favor cooling over heating.



Fiberglass duct? - CORRECT ANSWER Can be use instead metal duct in many applications.