Safety & CodesQuestion 94 of 110
Carbon monoxide is dangerous primarily because it is what?
a.A visible green gas
b.A refrigerant
c.A colorless, odorless toxic gas produced by incomplete combustion
d.Heavier than refrigerant vapor
Explanation
Carbon monoxide is a colorless, odorless gas produced by incomplete combustion of fuels, and it can be deadly because occupants cannot detect it. Cracked heat exchangers, poor venting, or inadequate combustion air can produce it. CO detectors and proper venting are essential safeguards.
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