Exhaust 13

Heating the diesel particulate filter is an effective way to burn off soot that has been trapped by the filter. Which of the following best describes the process of adding heat to the exhaust stream to oxidize the carbon to gaseous CO2?

• Scavenging

• Regeneration

• Recirculation

• Reduction

In addition to acting as silencers, most mufflers also function as (a)   arresters—an important safety factor when operating mobile and stationary diesel equipment in fire-prone areas.

Active Regneration can be achieved under load during normal vehicle operation.

• True

• False

Through what device is hot turbocharged air routed before being delivered to the intake manifold?

• Crossover tube

• Charge air cooler

• Resonator

• Splitter muffler

Which of the following is used to limit turbocharger boost and speed on a constant geometry turbocharger?

• Throttle

• Blow by Valve

• Waste gate

• Governor

The resistance to the free flow of gas is called ____.

• exhaust

• resonance

• ventilation

• back pressure

The ____ collects engine exhaust gases from the cylinder ports and carries them to an exhaust pipe

• intake manifold

• valve cover

• exhaust manifold

• crossover

Charge air coolers reduce the ____ of turbocharged air resulting in higher horsepower, quieter combustion, and reduced emissions.

• density

• temperature

• flow

• all of the above

A(n) ____ measures the temperature of the exhaust gases in each cylinder.

• rhostat

• refractometer

• exhaust pyrometer

• manometer

White smoke is an indication of oil consumption and can be caused by either turbocharger seal leakage or internal engine problems.

• True

• False