AUT108 Week 9 Flashcard Emissions

Front

Water can be considered a by-product of completely burned hydrogen fuel.

Back

True

Front

Catalytic converters come in two types: ________ and ________.

Back

Oxidizing; reduction

Front

Oxygen makes up the largest percentage of air in Earth's atmosphere. Select one:

Back

False

Front

If a vehicle passes a(n) ________ test with clean results, that is a good indication that all of the engine systems and the engine itself are operating well.

Back

Emissions

Front

Which of the following ensures that hydrocarbons are not released into the atmosphere when fuel in the fuel tank begins to vaporize and build pressure? Catalytic converter, EVAP system, EGR system, PCV system

Back

EVAP system

Front

Exhaust gas recirculation (EGR) systems began to appear on the automobile around _______ and became a mandatory part of emission controls.

Back

1972

Front

In older vehicles, crankcase vapors were vented directly to the atmosphere through a(n) ________ tube or road-draft tube. Modern vehicles now use a ___________ to recirculate the crankcase vapors back into the intake manifold.

Back

Breather: PCV Valve

Front

Replacement of gaskets in the crankcase to fix oil leaks due to pressure build-up will eventually cause _______.

Back

The gasket to leak again

Front

If a PCV valve is sludged up or sticky, then the PCV valve must be ________.

Back

Replaced

Front

Physical damage to a catalytic converter can occur under all of the following conditions EXCEPT: when a large rock strikes the converter, due to a thermal shock, when the hot convertor suddenly comes into contact with cold water in a deep pothole.

Back

when the catalyst is coated by silicone from improper sealants.