When charging systems with zeotropic refrigerants, such as R410A, the refrigerant must leave the refrigerant cylinder:
A) As a liquid-vapor mixture. B) As a liquid.
C) As a vapor. D) Under a pressure of at least 100 psig.
[Ques. 2] ACCA's Manual J:
A) Provides detailed procedures for installing air-conditioning equipment.
B) Is a national best practices overview for system installation.
C) Provides a complete list of board jumper locations.
D) Is used for determining the heat gain of a residential structure.
[Ques. 3] You are computing proper ventilation for a house with 1,500 sq ft of floor space, 8-ft ceilings, and you wish to have 1 air change per hour. What is the total ventilation in CFM required?
A) 100 CFM B) 350 CFM C) 200 CFM D) 110 CFM
[Ques. 4] What type of load study is recommended for duct design?
A) A shell load study B) A room-by-room load study
C) A monolithic load study D) A unified load study
[Ques. 5] To correctly identify pollutant pathways, technicians must understand:
A) How to use a particle counter.
B) The interaction of the building and its associated systems.
C) How to use a blower door.
D) The biology of potential microbial pollutants.
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