To make it less likely that a car engine will "knock" (have its fuel/air mixture ignite too early), the engine is designed so that
A) the fuel/air mixture is not compressed too tightly.
B) the fuel/air mixture is compressed as tightly as possible.
C) the fuel/air mixture remains cold until the sparkplug fires.
D) the fuel/air mixture stays at atmospheric pressure until the sparkplug fires.

Question

Quizplus · Accepted Answer

Engine knock occurs when the fuel/air mixture ignites prematurely, often due to high compression ratios. By not compressing the mixture too tightly, the likelihood of knock is reduced.

To Make It Less Likely That a Car Engine Will