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