If a performance vehicle has a 600 horsepower engine and uses 0.5 pounds of fuel per horsepower, with 6 cylinders and 6 injectors, how many pounds of fuel does it burn per hour?

If a performance vehicle has a 600 horsepower engine and uses 0.5 pounds of fuel per horsepower, with 6 cylinders and 6 injectors, how many pounds of fuel does it burn per hour?

• A. 300 lbs/hour
• B. 50 lbs/hour
• C. 150 lbs/hour
• D. 600 lbs/hour

Answer: (B)

Fuel flow is determined by how much power the engine produces and how much fuel is used per unit of power. If the engine makes 600 horsepower and uses 0.5 pounds of fuel for every horsepower-hour, the burn rate is 600 × 0.5 = 300 pounds per hour. The six cylinders and six injectors don’t change the total amount burned per hour; they’re just the means by which the engine delivers that power. So the engine would burn 300 pounds of fuel each hour at that power level.

Fuel flow is determined by how much power the engine produces and how much fuel is used per unit of power. If the engine makes 600 horsepower and uses 0.5 pounds of fuel for every horsepower-hour, the burn rate is 600 × 0.5 = 300 pounds per hour. The six cylinders and six injectors don’t change the total amount burned per hour; they’re just the means by which the engine delivers that power. So the engine would burn 300 pounds of fuel each hour at that power level.