Question

Rapid explosion of air-fuel mixture within the cylinder, when ignited by a spark is known as _______

(a) constant heat combustion

(b) constant pressure combustion

(c) constant volume combustion

(d) cut off ratio

I have been asked this question in an international level competition.

I'm obligated to ask this question of I.C. Engine Components topic in chapter Internal Combustion Engine of Farm Machinery

Answer 1

Right choice is (c) constant volume combustion

The best I can explain: There are two ways in which combustion takes place in the cylinder. When there is a rapid explosion of air- fuel mixture within the cylinder when it is ignited by spark, is called constant volume combustion and when there is a slow burning when the fuel is injected into highly compressed heated air, then it is known as constant pressure combustion.