The contacts in a potential relay are:
A) Normally closed.
B) Either normally open or normally closed depending on the compressor.
C) Modulating type contacts.
D) Normally open.
[Ques. 2] In a single-zone constant-volume system, which floors only have provisions for cooling?
A) Every floor B) Intermediate floors
C) Belowground floors D) Ground floors
[Ques. 3] Registers and grilles are typically installed:
A) After the house is framed.
B) After all the interior walls have sheetrock.
C) After most of the interior finish work is completed.
D) After the house is completely dried in.
[Ques. 4] What is a vent connector?
A) The vent connector is the collar on the gas appliance where the vent pipe connects.
B) The vent connector is the pipe running from the furnace to the vent.
C) A vent connector is used to join two pieces of vent pipe.
D) Vent connector is simply another name for vent.
[Ques. 5] Primary disadvantages of room air conditioners include:
A) They block part of the window area and produce operating noise.
B) They are only available in limited quantities.
C) Difficult installation requiring high levels of training.
D) They are more expensive than central systems.
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