Question

technician a says that hydrocarbons are created when raw fuel does not burn completely in the combustion chamber and is exhausted out the tailpipe. technician b says that hydrocarbons are created when raw fuel evaporates into the atmosphere. who is correct? a. technician a b. technician b c. both technician a and technician b d. neither technician a nor technician b

Explanation:

Hydrocarbons (\(HC\)) in vehicle emissions come from two main sources. One is incomplete combustion of fuel in the combustion chamber, which results in unburned fuel (hydrocarbons) being exhausted through the tailpipe (as Technician A says). The other is evaporation of raw fuel (such as from fuel tanks, carburetors etc.) into the atmosphere (as Technician B says).

Answer:

C. Both Technician A and Technician B