Beginning in May 2013, the minimum AFUE rating for a new furnace in the southern part of the United States is:
A) 80 percent. B) 60 percent. C) 78 percent. D) 90 percent.
[Ques. 2] Hot water heating coils should be piped:
A) With PVC pipe to take advantage of PVC's natural insulating ability.
B) For parallel flow so that the warmest water meets the coldest air.
C) With iron pipe for durability and strength.
D) For counter flow so that the warmest water meets the warmest air.
[Ques. 3] Why is the evaporative condenser the least popular?
A) It is too large for most applications. B) It requires special training to run effectively.
C) It has higher maintenance requirements. D) It is most effective in larger applications.
[Ques. 4] Adding humidity to heated air:
A) Increases the perceived room temperature.
B) Has no effect on perceived room temperature.
C) Reduces the level of carbon particles generated by heat pumps.
D) Decreases the perceived room temperature.
[Ques. 5] Annual Fuel Utilization Efficiency, AFUE, is:
A) Calculated by comparing a customer's gas bill to the calculated heat loss of their house.
B) The efficiency of the furnace for an entire heating season.
C) The cost of operating the furnace for an entire heating season.
D) Calculated by operating the furnace for one hour at the manufacturer's design condition.
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