Detailed explanation and options for the selected question.
Consider the following: 1. Aerosols, 2. Foam agents, 3. Fire retardants, 4. Lubricants. In the making of how many of the above are hydrofluorocarbons used?
A.
(a) Only one
B.
(b) Only two
C.
(c) Only three
D.
(d) All four
Explanation:
Explanation: Hydrofluorocarbons are used in aerosols, foam agents, and fire retardants, but not typically in lubricants.