Engine performance #4

Three-way catalytic converters contain which three precious metals

• rhodium,palladiumand platinum

• zinc,platinum and zircon

• gold,rhodium and zircon

• zinc,rhodium and platinum

The PCV valve

• is a separating device

• provides a metered air flow for the crankcase venting

• can be checked with a hand-held vacuum pump

• keeps the manifold cool

Three-way catalytic converters are used to control

• CO/HC/NOx

• HC/NOx/CO2

• HC/CO/CO2

• O2/CO/NOx

The catalyst monitor (O2 sensor) is located

• in the exhaust manifold

• in the crossover pipe

• downstream the catalytic converter

• upstream the catalytic converter

The exhaust gas recirculation (EGR) system is used to reduce

• CO2

• NOx

• HC

• CO