Allied & ICAR Exam Bank • ALLIED_0846 NAT • 2 Marks

Section 3: Farm Power

Farm Power

Subtopic: I.C. engine systems – fuel, cooling, lubrication, ignition, electrical, intake and exhaust

Question Statement:

Cetane rating of a diesel fuel measures its ignition quality. If a test diesel fuel matches an ignition delay blend of $52\%$ normal cetane ($C_{16}H_{34}$, cetane number 100) and $48\%$ heptamethylnonane (cetane number 15), its cetane number is $0.52(100) + 0.48(15) = 52.0 + 7.2$, which equals:

Answer Key:

59.2

Step-by-Step Solution & Explanation

Cetane number $= 52.0 + 7.2 = 59.2$.
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