How can a technician check to see if the coil and condensing unit on an AC split system are matched?
A) Call the equipment supplier and provide the system model numbers.
B) The refrigerant line stub out sizes should be the same.
C) The first two digits of the equipment model number should be the same.
D) Check to see that both pieces are manufactured by the same company.
[Ques. 2] If you try to remove tubing before all the brazing material is molten, the tubing will:
A) Not move. B) Warp or bend.
C) Break off in the joint. D) Remove easily.
[Ques. 3] Why are steam boilers used in applications requiring a large heating capacity?
A) Because they provide heat beyond the range of a hot-water boiler
B) Because steam pumps operate more efficiently than hot water pumps
C) Because hot water boilers cannot maintain a temperature over 212F
D) Because a pound of steam takes up less space than a pound of water
[Ques. 4] What information is necessary to determine a system balance point?
A) A heat load calculation and the system capacity at two operating conditions
B) The balance point is determined as part of the heat load study before the equipment is chosen.
C) The balance point for all AHRI rated heat pumps is 35F.
D) The manufacturer's installation instructions, which publish the equipment balance point
[Ques. 5] Contractors and technicians performing TAB services typically require certification by an independent TAB standards and certification organization such as:
A) UL or CSA. B) NEBB or AABC. C) AHRI or GAMA. D) The EPA or DOE.
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