What is the typical specific gravity of standard diesel fuel_________________?
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Answer: C. 0.85
Explanation
Standard diesel fuel has a specific gravity typically around 0.85 at standard reference temperatures. Specific gravity is a dimensionless ratio comparing the density of diesel to the density of pure water. This value confirms that diesel fuel is slightly less dense than water and floats on it. Specific gravity references water, which has a defined density of one gram per cubic centimeter. Petroleum products vary slightly in density depending on crude oil sources and refining processes. Density and specific gravity affect fuel mass calculations, buoyancy forces, and injection spray patterns.
Fuel storage and transport calculations require accurate specific gravity values to convert between mass and volume. Marine engineers account for fuel density when managing ballast water and ship stability during voyages. Quality control laboratories measure specific gravity routinely to verify petroleum product grades and purity. Option A represents the specific gravity of pure water, making it too dense for standard diesel. Option B represents a much lighter hydrocarbon fraction closer to volatile solvents or specialized aviation gasoline. Option D represents a substance half as dense as water, which does not match heavy petroleum distillates.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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