Internal Combustion Engines
The two reference fuels used for cetane rating are

Cetane and iso-octane
Cetane and alpha-methyl naphthalene
Cetane and normal heptane
Cetane and tetra ethyl lead

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Internal Combustion Engines
Which of the following statement is correct regarding petrol engines?

The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug
All of these
A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure
The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition

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