U₂₃₄

U₂₃₅

U₂₃₈

all of these

white

bluish

black

violent

haphazard motion of the gases in the chamber

rotary motion of the gases in the chamber

radial motion of the gases in the chamber

none of the above

cetane number 65

octane number 65

qetane number 35

octane number 35

In compression ignition engines, detonation occurs near the beginning of combustion.

Since the fuel, in compression ignition engines, is injected at the end of compression stroke, therefore, there will be no pre-ignition.

To eliminate knock in compression ignition engines, we want to achieve auto-ignition not early and desire a long delay period.

In compression ignition engines, because of hetrogeneous mixture, the rate of pressure rise is comparatively lower.