It is desired to find the cetane number of a fuel oil which has a density of 860 kg/m3 and a midpoint boiling temperature of 229°C. When tested in the standard test engine, the fuel is found to have the same ignition characteristics as a mixture of 23% hexadecane and 77% heptamethylnonane. Calculate: (a) Cetane number of fuel. (b) Percent error if cetane index is used to approximate the cetane number. [%]
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