What Type of Engine Emission Is Controlled by the Air-Fuel

question 59

Multiple Choice

What type of engine emission is controlled by the air-fuel ratio device?

• A)Oxides of nitrogen (NO_x).
• B)Carbon monoxide (CO).
• C)Particulate matter (PM).
• D)Hydrocarbons (HCs).

---

Definitions:

Upper Quintiles

Refers to the top 20% of the population in terms of income distribution, often used in studies of social, economic, and wealth stratification.

Income

The income earned, particularly in consistent intervals, from employment or investment returns.

Upper Quintile

Refers to the top 20 percent of the population or distribution in terms of income, wealth, or another statistical measure.

Income

The financial earnings received by an individual or entity, typically in the form of wages, salaries, or investments.