Question

A fuel of cetane number 40 has the same ignition quality as a mixture of ___________

(a) 40% cetane and 60% alpha methyl naphthalene

(b) 40% alpha methyl naphthalene and 60% cetane

(c) 40% petrol and 60% diesel

(d) 40% diesel and 60% petrol

I got this question in an online interview.

My enquiry is from Dual Fuel Operations topic in portion Conventional and Alternate Fuels of IC Engine

Answer 1

Right option is (a) 40% cetane and 60% alpha methyl naphthalene

Best explanation: A fuel of cetane number 40 has the same ignition quality as a mixture of 40% cetane and 60% alpha methyl naphthalene as cetane number is counted on cetane percentage.