What effect does the daily range have on heat gain?
A) Areas with a high daily range can take advantage of natural cooling that occurs at night, so the cooling HTMs can be a little smaller.
B) Areas with a high daily range experience higher temperatures, so the cooling HTMs are higher.
C) Areas with a high daily range generally do not require any cooling.
D) Areas with a high daily range generally require equipment with more latent cooling capacity.
[Ques. 2] A common cause of low system superheat is:
A) Oversized evaporator coils.
B) Poor airflow across the evaporator.
C) Depletion of the superheat coating on the evaporator coil.
D) System undercharged with refrigerant.
[Ques. 3] Refrigerant vapor removed from the oil travels directly to the:
A) Cooler outlet. B) Cooler suction.
C) Compressor outlet. D) Compressor suction.
[Ques. 4] In a dual-fuel heat pump packaged system, when does the furnace go into use?
A) Once the outdoor temperature drops to the balance point
B) Once the outdoor temperature is below the balance point
C) Only when it is most economical
D) Only during winter conditions
[Ques. 5] What maintenance does an electronic air cleaner require?
A) Periodically cleaning the ionized plates
B) Annual replacement of the electrostatic precipitation unit
C) Very little maintenance is required because the plates burn up the contaminants.
D) Periodically replacing the ionized plates
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