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

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

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Internal Combustion Engines
Pick up the wrong statement about supercharging

There can be limited supercharging in petrol engines because of detonation
Supercharging reduces knocking in diesel engines
Supercharging results in fuel economy
Supercharging at high altitudes is essential

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