Question

question 9
1 pts
the use of diesel exhaust fluid (def) in a vehicle equipped with a diesel engine is
used to reduce ______ emissions.
co
nox
hc
all of the above

Explanation:

Diesel exhaust fluid (DEF) is mainly used to reduce nitrogen oxides (NOx) emissions. DEF reacts with NOx in the catalytic converter to form harmless nitrogen and water. CO (carbon monoxide) and HC (hydrocarbons) are not the primary emissions targeted by DEF.

Answer:

NOx