Some codes limit refrigerant 410A to 25 pounds per 1000 cubic feet of space. This works out to 40 cubic feet per pound of refrigerant. The limit is lower, ________ cubic feet per pound of refrigerant for 24 hour care facilities such as hospitals and nursing homes.
A) 30 B) 50 C) 20 D) 15
Question 2
What are the three most common ways to reduce pollutants in indoor air?
A) HEPA filters, electronic air cleaners, and UV lights
B) Source removal, ventilation, and filtration
C) HEPA filters, UV lights, and ozone generators
D) Creating a negative building pressure, filtration, and ventilation
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The density of Pb(s) is 11.34 g/cm3. Pb(s) exists in the cubic-closest packed structure