AUT108 Week 8 Quiz-Intake & Exhaust Systems

Tech A says that coolant circulates through some intake manifolds to help warm them up. Tech B says that some intake manifolds use an electric heater grid to warm up the intake air. Who is correct?

Select one:

• Tech A

• Tech B

• Both A and B

• Neither A nor B

The purpose of the air cleaner is to:

Select one:

• clean the air.

• muffle noise.

• retard flames.

• All of the above.

Back-pressure is always caused by a blockage in a muffler.

Select one:

• True

• False

Tech A says that the fuel injectors are mounted in the throttle body on gas direct injection engines. Tech B says that air and fuel are mixed in the intake manifold on gas direct engines. Who is correct?

Select one:

• Tech A

• Tech B

• Both A and B

• Neither A nor B

Tech A says that shorter intake manifolds produce higher torque at lower rpm. Tech B says that longer intake manifolds produce higher torque at high engine speeds. Who is correct?

Select one:

• Tech A

• Tech B

• Both A and B

• Neither A nor B

A supercharger compresses the air in the intake system to above atmospheric pressure, which increases the density of the air entering the engine.

Select one:

• True

• False

Tech A states that power is produced when a mixture of air and fuel is burned inside an engine cylinder. Tech B states that if more air is forced into the cylinder, more power can be produced with each power stroke. Who is correct?

Select one:

• True

• False

The exhaust components are supported along the length of the vehicle by _______ suspended from the underbody.

Select one:

• Brackets

• Flexible connections

• Engine pipes

• Intermediate pipes

A catalytic converter converts all of the following gases into less harmful gases EXCEPT:

Select one:

• carbon monoxide.

• hydrocarbons.

• oxides of nitrogen.

• sulfur oxides.

Tech A says that the catalytic convertor runs very hot, so a heat shield is installed to protect the vehicle occupants. Tech B says that the catalytic convertor is mounted close to the exhaust manifold to allow it to heat up very fast to control emissions. Who is correct?

Select one:

• Tech A

• Tech B

• Both Techs A and B

• Neither Tech A nor B