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By which quantity is ignition quality of diesel fuel indicated?

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By which quantity is ignition quality of diesel fuel indicated?

(a) Fire point

(b) Flashpoint

(c) Cetane point

(d) Octane point

This question was addressed to me in final exam.

This key question is from Conventional Fuels in chapter Nonconventional Engines, Conventional Energy Sources & Cooling System of Automobile Engineering

1 Answer

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Correct option is (c) Cetane point

The explanation: Ignition quality of diesel fuel indicated by cetane point. Cetane number of a fuel is defined as the percentage of normal cetane in a mixture of normal cetane and α-methyl naphthalene by volume.

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