Light Vehicle Emissions and Control Systems Quiz

What is the primary function of a catalytic converter in a vehicle's exhaust system?

• To reduce the noise produced by the exhaust

• To monitor the exhaust flow rate

• To convert harmful pollutants into less harmful emissions

• To cool down the exhaust gases before release

Which harmful emissions are primarily targeted by catalytic converters?

• Carbon dioxide and water vapor

• Nitrogen and oxygen

• Carbon monoxide, hydrocarbons, and nitrogen oxides

• Argon and neon

What does EGR stand for in automotive terms?

• Engine Gas Recirculation

• Exhaust Gas Recirculation

• Emission Gas Regulation

• Exhaust Gas Regulation

How does the EGR system reduce nitrogen oxide emissions?

• By cooling the combustion chamber

• By recirculating a portion of an engine's exhaust gas back to the engine cylinders

• By filtering the exhaust gases

• By increasing the oxygen content in the combustion chamber

What is the main purpose of Diesel Particulate Filters (DPFs) in diesel engines?

• To reduce the engine's noise

• To capture and store particulate matter (soot) from the exhaust

• To convert CO2 into oxygen

• To increase fuel efficiency

Selective Catalytic Reduction (SCR) systems reduce emissions of which pollutant in diesel engines?

• Carbon monoxide

• Hydrocarbons

• Nitrogen oxides

• Particulate matter

What is the main chemical used in SCR systems to reduce NOx emissions?

• Carbon dioxide

• Urea (AdBlue)

• Hydrochloric acid

• Sodium chloride

Evaporative Emission Control Systems are designed to prevent which of the following?

• The release of nitrogen oxides into the atmosphere

• The evaporation of unused fuel into the atmosphere

• The escape of exhaust gases into the vehicle cabin

• The overheating of the engine

During which condition is the EGR system typically activated?

• During engine startup

• At full throttle

• Under light to moderate engine loads

• When the engine is turned off

What happens to the particulate matter collected by a Diesel Particulate Filter over time?

• It is expelled out when the vehicle accelerates.

• It accumulates and blocks the filter, requiring replacement.

• It is burned off during a regeneration process.

• It is recycled back into the fuel system.