What does the diesel index represent as an alternative measure of diesel fuel quality?

Petroleum Refinery Engineering MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Petroleum Refinery Engineeringchemical-engineering › petroleum-refinery-engineering
Published
1 Mar 2019
Last updated
28 May 2026

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Choose the correct answer

Explanation

Option A states that the diesel index is obtained using a test engine, option B claims it is unrelated to the aniline point, and option C defines it as the cetane number plus 3. Since only option C is accurate, the correct answer is that the diesel index equals the cetane number plus 3.

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