If your vessel burns 8 tons of fuel per hour...

Question 1 / 270705eccef9dbacbc34ba4d45dce

Question 1 of 270705eccef9dbacbc34ba4d45dce

If your vessel burns 8 tons of fuel per hour at 15 knots, how many tons per hour will it burn at 22 knots?

Question 1 of 27070

If your vessel burns 8 tons of fuel per hour at 15 knots, how many tons per hour will it burn at 22 knots?

🔍 Key Concepts

• Fuel consumption vs. speed and how they are related on many exam problems • The idea that required power (and thus fuel burn) often changes with the cube of the speed for displacement vessels • Setting up a ratio or proportion using the known condition to find the unknown condition

💭 Think About

• Ask yourself: if fuel burn is proportional to the cube of the speed, what equation can I write using the two speeds (15 and 22 knots)? • How can you use a ratio like (New fuel rate / Old fuel rate) = (New speed / Old speed)^3 to scale from 8 tons/hour at 15 knots to the new fuel rate at 22 knots? • After calculating the theoretical fuel burn at 22 knots, which answer choice is closest to your computed value?

✅ Before You Answer

• Be sure you’re using knots (speed), not distance, in your power/fuel ratio • Confirm you are raising the speed ratio to the correct power (not just squaring it or using it directly) • Double‑check your calculator steps and make sure the final number’s size makes sense: the fuel consumption should increase significantly from 15 to 22 knots, not just a tiny amount

Question 1 of 27070

If your vessel burns 8 tons of fuel per hour at 15 knots, how many tons per hour will it burn at 22 knots?

11.7 tons

17.2 tons

14.2 tons

25.2 tons