Question

A mixture containing $60$% cetane and $40$% iso-octane will have:

• A. Cetane number $60$
• B. Cetane number $40$
• C. Octane number $40$
• D. None of these

Answer 1

The correct option is D None of these

None of the given options is the correct answer.

Octane number is the percentage of iso-octane present in a mixture of iso-octane and n-heptane which matches the fuel in knocking.
Cetane number is the percentage of cetane in a mixture of cetane and alpha-methylnaphthalene that will have the same ignition characteristics as the fuel under examination.