Well, I got a 90%, (also got messed up on worm gears) but I think
there's room to quibble on two others.
#15 presumes a frictionless pulley - I live in the real world and know
that a straight lift with no pulley requires the least force.
#31 has no correct answer stated. The correct answer is 60 since the
actual mechanical ratio for the lever is 5:1.
I had the same problems with poorly written questions in college. My
professors did not seem amused...
On Thu, 18 Oct 2007 21:41:54 -0700, with neither quill nor qualm, "Jon
Danniken" quickly quoth:
I got the gears but missed some of the pulleys, then I misread the
balloon/atmosphere question. 84% here.
P.S: Did you find any of that polyester lead yet?
History is often stranger than fiction. Fiction has to be plausible.
History is what happens when people don't follow the script.
--pete flip, RCM
firstname.lastname@example.org (Doug Miller) fired this volley in
I thought just a moment about that, then considered that the switch and
power are ALWAYS in series when supplying a load.... the nature of a
circuit is expressed concerning the load arrangement, not the power
One question I found ambiguous, because two answers are true to some
degree was the one about the normally aspirated engine. Yes, atmospheric
pressure pushes the air charge in, but it wouldn't push it in unless
"suction" (lowered pressure) were created by the piston moving down.
I think they got that one wrong as well. They seem to be assuming the
center of mass of the two boxes is out at their far edges (that gives
their answer, anyway).
I'd also quibble with 44 -- you have to know a bit more about what's
going on downstream before you can predict what's going to happen in
tube B. If the tube ends at the edge of the picture, you could get a
vacuum in tube B...
There are some more where I got their answer, but I think other answers
are equally valid: I got their answer for 48, but "suction" is just as
good an answer for a mechanical aptitude test (it would be wrong in a
physics test). Likewise for 49, what do they mean by "easiest"?
Again, I got their answer, but I note diesel can be ignited with no
spark at all.
Course not -- we know what the questions mean, you should read our
minds! (I am a professor, and I'm joking)
Note -- I got 92. Missed the worm drive, two of the pulley questions
had similar enough pictures that I thought I'd mis-clicked and missed
one as a result, and the two quibbles above.
I got just under a failing grade, and found the test to be crappy. As
already pointed out, some of the questions were ambiguous, and there weren't
a lot that applied to real world situations, but more to theory.
I agree, Lloyd. I also had a question about the pressure differential
in the venturi setup. I think tube A would have some height in it while
tube B would be evacuated. I also question the direction of rotation on
the worm gear.