What is the practice total usable fuel value?

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Multiple Choice

What is the practice total usable fuel value?

Explanation:
Total usable fuel is the amount of fuel that can actually be burned in flight. It equals the fuel capacity minus any unusable fuel that cannot be drawn from the tanks. In this problem, the aircraft has a total capacity of 3611 lb with about 111 lb of that being unusable, so the usable amount is 3611 − 111 = 3500 lb. That 3500 lb is the value used for planning and calculations in the question. The other numbers would correspond to different assumptions (like the total capacity or a different unusable amount) and aren’t the value defined for this scenario.

Total usable fuel is the amount of fuel that can actually be burned in flight. It equals the fuel capacity minus any unusable fuel that cannot be drawn from the tanks.

In this problem, the aircraft has a total capacity of 3611 lb with about 111 lb of that being unusable, so the usable amount is 3611 − 111 = 3500 lb. That 3500 lb is the value used for planning and calculations in the question.

The other numbers would correspond to different assumptions (like the total capacity or a different unusable amount) and aren’t the value defined for this scenario.