Multiple choice

Which one of the following is used for rating diesel oil?

  1. Fuel number

  2. Magic number

  3. Octane number

  4. Cetane number

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The cetane number is used to rate diesel oil, indicating its combustion quality. Higher cetane numbers mean better ignition quality and smoother combustion in diesel engines, similar to how octane rating works for petrol.