People maintain their steady internal body temperature by:
A) Producing exactly the amount of heat needed to maintain body temperature.
B) Producing more internal heat than needed and expelling the extra heat.
C) Adjusting our internal temperature to the surrounding conditions.
D) Sunning ourselves on radiant surfaces.
Question 2
What type of vent is designed specifically for category I gas appliances?
A) Type B vent B) Single-wall, galvanized metal vent
C) PVC vent D) Type L vent