Senior bellringer 11/8/2020

Emission control systems that admit air into the exhaust system are known as

• positive crankcase ventilation systems

• clean air packages

• air injections systems

• EGR valves

If the EGR valve is stuck slightly open, the engine idle will be

• high

• unchanged

• rough

• none of the above

An air injection system is used to

• continuing burning vapors in the exhaust system

• keep the exhaust manifold cold

• run air past fuel rail to prevent vaporizing fuel

• help push exhaust through the catalytic convertor

In an evaporative system, what allows the fuel to breathe to the outside?

• air filter

• fuel filter

• carbon canister

• PCV valve

What part of the fuel evaporative system will cause the check engine light to go on

• fuel cap

• oil cap

• air cleaner

• EGR valve