432 Q6 Performance

The engine speed (N) is the speed of

• crankshaft rotation (rpm)
• the car wheels كفرات (rpm)
• the car itself (km/h)
• the engaged gear in the gearbox

Which of these statements is true?

• Engine cycle time becomes longer at higher engine speed (N).
• Engine cycle time becomes shorter at higher engine speed (N).
• Engine cycle time is not a function of engine speed (N).

The main cycle processes have sub-processes of their own.

• True.
• False.

Which engine CANNOT be pushed to high N ?

• SIE
• CIE
• Both SIE & CIE
• Any engine can be pushed easily to high N

Which of the following statements is true?

• CIEs typically operate at lower rpm compared to SIEs.
• CIEs typically operate at higher rpm compared to SIEs.
• CIEs and SIEs typically operate over the same rpm range.
• Both CIEs and SIEs cannot be pushed to high rpm.

The number "5.0" depicted on this Ford Mustang engine describes

• the engine displacement volume (size) in liters.
• the stroke volume of one cylinder in liters.
• the number of cylinders in the engine.
• the maximum engine power in MW.

The volumetric efficiency describes the

• engine ability to pack its cylinders with air.
• output power from the engine volume.
• engine efficiency when burning one unit volume of fuel.
• engine efficiency when consuming one unit volume of air.

The volumetric efficiency equals 100% in new cars.

• True.
• False.

Cleaning/replacing the engine air filter during scheduled maintenance

• keeps the volumetric efficiency high.
• reduces the volumetric efficiency.
• has no effect on the volumetric efficiency.

The shape of intake manifold has no effect on volumetric efficiency.

• True.
• False.