Senior weekly Quiz 12/11/2020

Three-way catalytic convertors contain which three precious metals

• rhodium ,palladium ,and platinum

• zinc, platinum, and zircon

• gold, rhodium, and platinum

• zinc, rhodium, and platinum

Three-way convertors are used to control which of the following

• O2 / CO / NOx

• CO / NOx / HC

• HC / NOx / C02

• HC / CO / CO2

The catalyst monitor (O2 sensor) is located

• in the exhaust manifold

• in the upper head

• downstream of the catalytic convertor

• upstream of the catalytic convertor

The EGR system is used to

• lower combustion chamber temperature

• control NOx

• recirculate exhaust gas into the combustion chamber

• all of the above

The PCV system

• prevents crankcase emissions from entering the atmosphere

• is designed to improve fuel economy

• is designed to improve cold starts

• decreases the carburetor venturi opening at highway speeds

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