432 Q13 Knock

Knock is the explosion sound that is heard when the spark plug fires and combustion occurs normally.

• True.
• False.

The most challenging part of clearance-volume design is the end-gas region.

• True.
• False.

Knock can be avoided by cooling the end gas properly.

• True.
• False.

If your engine leaks coolant, it will knock excessively.

• True.
• False.

The use of commercial engine-cleaning solvents (مذيبات الأوساخ) helps reduce knock in SIEs.

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

The higher the ON, the less likely is the spark-ignition fuel to knock.

• True.
• False.

(Brain Builder) Higher compression ratios can be reached in SIEs if we use gasoline fuels with higher bio-ethanol percentage.

• True.
• False.