Carburetor is a device in an internal combustion engine where fuel is vaporized and mixed with air prior to ignition.
The purpose of carburetor is to provide a mixture of petrol and air for combustion in the engine. The mixture normally consists of one part (by weight) of petrol and fifteen parts of air, but thin mixture varies quite considerably with temperature and engine speed.
If there is a higher proportion of petrol, the mixture is said to be "rich". A higher proportion of air than said, gives a weak mixture
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