Bunker "C" is classified as a grade __________.
• Flammable and combustible liquid grades as used in maritime safety and firefighting regulations • Typical properties of Bunker C (heavy fuel oil) — viscosity, flash point, how easily it ignites • How grade A/B/C/D/E liquids differ in terms of volatility and fire risk
• Is Bunker C a light, easily vaporized fuel like gasoline, or a heavy, thick fuel that needs to be heated to flow? • Which grades (A, B, C, D, E) are used for the most volatile fuels, and which are used for the least volatile, hardest-to-ignite fuels? • Think about the flash point of heavy fuel oil compared to diesel and gasoline — which grade group would that fit into?
• Recall that higher fire/flash risk = earlier letters (A, B) and lower volatility/heavier oils = later letters • Verify whether Bunker C is considered a heavy residual oil rather than a distillate fuel • Check how grade letters are ordered from most to least hazardous in terms of fire/explosion risk before choosing your answer
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