What is the total available static pressure for the ductwork in a system with the following specifications?
Blower: 0.6 WC total external static at design airflow
Evaporator Coil: 0.25 in WC static pressure drop at design airflow
Filter: 0.15 in WC static pressure drop at design airflow
Registers and Grills: 0.05 WC static pressure drop at design airflow
A) 0.15 in WC available static pressure B) 10 in WC available static pressure
C) 0.6 in WC available static pressure D) 0.25 in WC available static pressure
[Ques. 2] As an operational safety check, the equipment rooms for combustion appliances should be checked for high:
A) Carbon dioxide levels. B) Nitrogen levels.
C) Carbon monoxide levels. D) Oxygen levels.
[Ques. 3] What is a hydronic terminal unit?
A) The coils and devices that heat the building
B) The last convector in a hydronic loop
C) A reverse return loop that is installed on the end of a hydronic run
D) A unit that is specifically designed for use in airports and train stations
[Ques. 4] What type of metering device do most packaged water source heat pumps use?
A) Single orifice style metering device B) Single capillary tube
C) Single low-side float control D) Single bi-flow thermostatic expansion valve
[Ques. 5] Compared to the over-fire draft, the stack draft should be:
A) More negative than the over-fire draft. B) About the same as the over-fire draft.
C) A positive pressure. D) Less negative than the over-fire draft.
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