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Final Approach
I'm working through each and every question for the instrument written using ASA PrepWare. I know that some FAA test questions are deliberately designed to be impossible to answer with the information given (due to such things as the MSA being unreadable on an approach plate, that sort of thing) and so you just have to memorize the answer. I'm also a little nervous about the enroute time/fuel burn calculation questions since in some of them, it looks to me as if there isn't enough information to solve the problem (e.g. a flight log form box for an approach leg is left blank: usually the "descent" leg time is given and you're supposed to assume that the descent includes the approach, even though the leg, as logged, ends at the IAF). So that's what I'm working on now.
Anyway I ran across the question where you're supposed to calculate the fuel burn for a flight from GJT to DRO given an average fuel consumption rate of 17.5 gph. The flight times for all but the second leg are filled in and that comes out to about 26 minutes, for a grand total of something like 68 minutes flight time. On my calculator, at 17.5 gph, that works out to 19.8 gallons burned, so I would have chosen 20 gal (answer B) as my answer.
But according to ASA, the correct answer is 17 gal (answer A) and they even show their work: 1:08:50 flight time at 17.5 gph works out (says ASA) to 17.3 gallons.
Right. Flight time is >1 hr, yet the fuel burned is LESS than the amount burned in 1 hour?! (Or is there an FAA-standard hour of 70 minutes that I don't know about??)
Obviously ASA's answer (or at least their calculation) must be wrong, but what I'm wondering is whether the FAA also considers the correct answer to be A, and if so, why?
Anyway I ran across the question where you're supposed to calculate the fuel burn for a flight from GJT to DRO given an average fuel consumption rate of 17.5 gph. The flight times for all but the second leg are filled in and that comes out to about 26 minutes, for a grand total of something like 68 minutes flight time. On my calculator, at 17.5 gph, that works out to 19.8 gallons burned, so I would have chosen 20 gal (answer B) as my answer.
But according to ASA, the correct answer is 17 gal (answer A) and they even show their work: 1:08:50 flight time at 17.5 gph works out (says ASA) to 17.3 gallons.
Right. Flight time is >1 hr, yet the fuel burned is LESS than the amount burned in 1 hour?! (Or is there an FAA-standard hour of 70 minutes that I don't know about??)
Obviously ASA's answer (or at least their calculation) must be wrong, but what I'm wondering is whether the FAA also considers the correct answer to be A, and if so, why?