The fuels in order of decreasing knock tendency for spark ignition engines are ___________
A. paraffins, aromatics, naphthenes
B. paraffins, naphthenes, aromatics
C. naphthenes, aromatics, paraffins
D. none of the mentioned
Answer:B
The fuels in order of decreasing knock tendency for spark ignition engines are ___________
A. paraffins, aromatics, naphthenes B. paraffins, naphthenes, aromatics C. naphthenes, aromatics, paraffins D. none of the mentioned