Aviation turbine fuel (ATF/jet fuel) has an average boiling range closest to which common refinery fraction?
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ALubricating oils
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BLPG
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CDiesel
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DKerosene
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EGasoline (petrol)
Answer
Correct Answer: Kerosene
Explanation
Introduction:Aviation turbine fuel (jet fuel) is a middle distillate with a boiling range designed for combustion stability, safety, and operability at altitude. Its range aligns closely with kerosene cuts.
Given Data / Assumptions:
- Product: ATF/jet fuel.
- Comparison set: LPG, gasoline, kerosene, diesel, lube oils.
Concept / Approach:ATF specifications (e.g., freezing point, flash point, volatility) are engineered around a kerosene-range distillate, not as light as gasoline nor as heavy as diesel/lube oils.
Step-by-Step Solution:1) Place ATF within distillation ladder: mid-distillate region.2) Identify closest standard fraction: kerosene-range hydrocarbons.3) Select answer consistent with specs and practice.
Verification / Alternative check:Jet-A/Jet-A1 products are essentially kerosene-type fuels; kerosene hydrocarbon distillation profiles match ATF closely.
Why Other Options Are Wrong:LPG and gasoline: Too light.Diesel and lube oils: Heavier boiling ranges.Gasoline: Different volatility and octane requirements.
Common Pitfalls:Equating ATF with diesel because both are middle distillates; ATF is typically lighter and more tightly specified in freezing point and smoke point compared with diesel.
Final Answer:Kerosene