432 Q14 Knock + SC/TC

(Brain Builder) If a diesel engine has knock issues, adding CN enhancers into the fuel tank will help reduce knock.

• True.
• False.
• This statement is misleading (مضللة).

The cetane number (CN) is defined to describe the ability of compression-ignition fuels to autoignite

• faster
• slower

Good diesel fuels have

• higher CN and shorter ID.
• higher CN and longer ID.
• lower CN and faster ignition.
• lower CN and slower ignition.

(Brain Builder) Mixing ethanol with diesel enhances its CN.

• True.

• False.

Which parameter does super/turbocharging increase, in order to boost the power?

• Inlet density
• Engine speed
• Fuel-to-air ratio
• Mean piston speed

The supercharger is powered by the

• engine crankshaft
• car wheels
• engine exhaust
• car battery

The turbocharger is powered by the

• engine crankshaft
• car wheels
• engine exhaust
• car battery