While steaming at 12 knots, your vessel...

Question 1 of 2707066636eea28f7522a1c51b60d

While steaming at 12 knots, your vessel burns 45 tons of fuel per day. What will be the rate of fuel consumption if you decrease speed to 11.5 knots?

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Question 1 of 27070

Q

While steaming at 12 knots, your vessel burns 45 tons of fuel per day. What will be the rate of fuel consumption if you decrease speed to 11.5 knots?

🔍 Key Concepts

• Relationship between speed and fuel consumption (approximately proportional to the cube of speed for many displacement vessels) • Setting up a ratio/proportion between old and new fuel consumption using speeds • Converting the relationship into an equation to solve for new tons/day

💭 Think About

• How does fuel consumption change when speed changes slightly—does it change linearly with speed, or faster/slower than that? • Can you express the new fuel consumption as: old consumption × (new speed ÷ old speed) raised to some power? • Once you find the factor by which fuel use changes, which choice is closest to the adjusted value?

✅ Before You Answer

• Be clear what stays constant (same vessel, same conditions) and what changes (only speed). • Make sure you use the same units for both speeds (knots) and both consumptions (tons/day). • After calculating, check whether the new fuel consumption should be slightly less than 45 tons/day, not drastically different.