Originally Posted by
gbruyn
Okay... need some help figuring out these questions on the gouge (maybe rule of thumb used and or source). Some I can figure out with some trig, but no calcs allowed during test.
Just a heads up - a lot of what passes as "gouge" out there is very outdated, with incorrect answers, and not on the Delta knowledge test. There are also a lot of questions in the question bank that have not made it to the gouge. In other words, if you studied nothing but gouge questions, like most of us did, you would probably only recognize about about 1/3 of the questions on the test. The rest you would have to use brainpower for, which hopefully all of your studying prepared you for.
Second, in talking to several folks who took the test, and reading the recent trip reports, to my knowledge there are no fix-to-fix questions or questions about calculating the distance between lat/long coordinates.
Third, a lot of the gouge has questions and/or answer choices that are worded incorrectly from people's memory. So, I would not sweat it if it seems like there is no way to figure out a question - chances are someone regurgitated it incorrectly in the gouge and both the question and the answers are incorrect on the gouge.
But anyway, here goes:
Originally Posted by
gbruyn
You are on the XYZ VOR 090° radial at 20 DME. You are instructed to proceed direct to the XYZ VOR 180° radial at 70 DME. The direct, no wind heading is:
a) 185°
b) 190°
c) 195°
d) 200°
I don't think there is a shortcut to figure this one out (and it is not in the test bank, at least not that I have heard of in coordinating with dozens of folks who recently took the test). But if you draw it out, it is like a 195 heading.
Originally Posted by
gbruyn
You are at airport A located at 33’20”N 108’02”W. You are flying to airport B located at 35’55”N 107’58”W. Approximately how many miles is it from airport A
to airport B?
a) 4
b) 120
c) 155
d) 200
You are located at 34’20” N and 108’02 W and 38’50” N and 107’58” W. How many miles is it between coordinates
There are no questions like this either, but from what I studied, 1' in latitude equals 60 NM. Degrees of longitude vary depending on where you are, so I think you just ignore longitude and assume you did not move East/West but that you just moved North/South instead.
So for the first one, you went 2' and 35" North, which is about 150 NM if you figure each minute North is 60NM. Again, ignore the slight movement west, and I would say 155 NM
For the second one, you moved 4' and 30" North, which would be 4.5 minutes North, which would be 4.5 x 60 NM = 270NM
Originally Posted by
gbruyn
You are on the XYZ 270 radial at 30 DME. You are cleared to fly the 30 DME arc to the 300 radial, and hold. You are flying at .6 Mach and it is 1800z. At what time will you arrive at the holding fix?
a) 1805z
b) 1810z
c) 1815z
d) 1820z
There are a lot of questions that deal with mileage and groundspeed. Nobody that I know if had to calculate mileage on an arc, but there is plenty of 60:1 stuff. So this is a good question to understand.
60:1 rule, at 30DME, each radial is 2NM, right? So you moved 30 radials, or 60 NM. At .6 Mach, you are 6 NM/minute, so it takes you 10 minutes to make that arc. 1810Z.
Originally Posted by
gbruyn
You are on the XYZ VOR 090 radial at 30 DME and you need to fly direct to the 190 radial at 60 DME. What is the no wind heading.
a. 180
b. 190
c. 210
d. 235
Again, I don't think there are questions of this type on the test, but if you drew this one out, you would see it makes a 30/60/90 triangle, with the angle pointing toward where you are headed being 60 degrees off. That makes the only logical choice the one that is 60 degrees off the 90-270 line, which would make the heading 210.
Originally Posted by
gbruyn
What causes the loud noise of a jet engine?
a. High speed of compressors
b. Fast moving air being ejected (Guessing it's this one but can't find source)
c. The hot gases mixing with the cooler atmosphere
d. Something Else
There are lots of questions about air velocity, fuel flow, temperature, etc. inside the turbine engine, but I have not heard of anyone in the 2014 time frame getting this question. But when I researched this particular question, and in discussion with others, jet exhaust makes noise from the "turbulent mixing of the high speed exhaust with the ambient air" or "the shearing action caused by the relative speeds between the exhaust jet and the atmosphere." So depending on the answer, you kind of have to make it match one of these answers. Technically all of those answers contribute to the noise an engine makes, which is why I would bet that whoever tried to remember this question from memory remembered incorrect answers. In other words, study the real cause of jet noise as opposed to trying to memorize wrong answers to a possibly incorrectly worded question that someone remembered incorrectly.
Finally, a bunch of us online recently collaborated to try and drastically clean up the gouge. We used a bunch of recent trip reports and discussion with people who interviewed this year, along with stuff that was already out there and stuff from Emerald Coast. The end result was a dramatic overhaul of the gouge, where hopefully all of the old stuff was purged out and all of the 2013/2014 interview stuff is clearly labelled as such.
Send me a PM and I will email you the link where we have all of the new gouge up. Anyone else who wants the updated gouge, feel free to PM me also, and I will set you up with it.
Good luck on the interview. All of the preparation and studying should pay off.