In which of the following types of heat engines carburettor is used ?

Detailed Solution:

The correct answer is “Petrol engine”.

A carburettor is used in a petrol engine. It is a device that mixes air with a fine spray of liquid fuel (petrol) to create a combustible mixture that can be ignited in the engine's combustion chamber. Diesel engines, on the other hand, use a different system, typically involving fuel injection rather than a carburettor.