Question

19
which of the following is one of the functions of an air cleaner?
a. preventing harmful gases from entering the passenger compartment
b. muffling the noise of the intake pulses
c. restricting the airflow to the engine at higher speeds
d. reducing the noise of combustion

Explanation:

An air - cleaner is mainly used to filter out harmful particles and substances from the air that enters the engine. One of its functions is related to the air intake process. Option b is correct because air - cleaners can muffle the noise of the intake pulses. Option a is more related to ventilation systems in the passenger compartment rather than the air - cleaner's function for the engine. Option c is incorrect as air - cleaners do not restrict airflow in a harmful way (they are designed to allow proper airflow with filtration). Option d is about combustion noise reduction which is not a primary function of an air - cleaner.

Answer:

b. Muffling the noise of the intake pulses