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**Alan Wheeler** · 19-10-2007, 13:16

I got one wrong. #48. Although it is technically correct I guess.

**GordMay** · 19-10-2007, 13:21

Quote:

Originally Posted by TAREUA

Gord, I assume 50% is passing?

A score of 10% might put you in the upper 90 percentile of North Americans.

cferger · 19-10-2007, 15:10

78% my mother will not be happy.

senormechanico · 19-10-2007, 17:27

94%

stupid fans, lol

Steve B.

TX Sailor · 19-10-2007, 19:10

They are wrong about #15 there is fricton anytime you use a block (or pulley to them). Just try to crank someone up a mast with the halyard ran through a bunch of blocks then try it with the same winch on the mast. Big difference.

Lodesman · 19-10-2007, 19:25

I don't agree with 48, both answer are half-correct. However the answer to 38 is plain wrong.
Air is moving back to front in the driving fan and front to back in the other - it's the same as putting your outboard in reverse; it has to turn in the opposite direction.

**Ex-Calif** · 19-10-2007, 19:47

Quote:

Originally Posted by cal40john

You did make me see how I looked at the picture wrong though. I made it a 14 sq. in. disk on top and a 2 sq. in. disk on the bottom with a fluid in between, so applying pressure made no sense. I now see that the problem is a 14 sq. in. tube that reduces to a 2 sq. in. tube that has a stepped piston in it. Is that used anywhere in real life?

I am not sure what you mean by "is that used anywhere in real life."

This is the basis for hydraulic brake systems. Small pressure applied by foot - very large pressure applied to brake pistons.

senormechanico · 19-10-2007, 19:55

Quote:

Originally Posted by Ex-Calif

I am not sure what you mean by "is that used anywhere in real life."

This is the basis for hydraulic brake systems. Small pressure applied by foot - very large pressure applied to brake pistons.

It's also used in Spectra watermakers, i.e. the Clark Pump.

Steve B.

Lancerbye · 19-10-2007, 20:48

Gord

I had a hard time with #2 on your test. Couldn't find my license to check the spelling of my name. LOL

Thermal · 20-10-2007, 04:43

Well, got a 92. Made a couple of dumb mistakes, but for a couple of others... seems to me that this test has a large number of questions testing your knowledge of lingo, not your understanding of the mechanical concepts - Q48 being a prime example. I still don't get it. Is it that "suction" creates lower pressure that is the equalized by atmospheric pressure pushing air in instead of suction "pulling" air in? Seems like splitting hairs, considering the same test talks about Kg of force in several questions, yet a kilogram is not a unit of force but a unit of mass. The metric unit of force is a newton.

hellosailor · 20-10-2007, 06:28

Hey, Gord, you must be one of the folks who writes trick questions for the Regents' Exams.<G>

" 1) Who won World War II, and who finished second?"
Considering the relative economic shifts to the Axis and Allied powers? One could argue the Allies won the battles--and lost the war.

"2) Explain Einstein’s "Theory of relativity", " Hmmmm....Can you say, it was his BEST GUESS as to how parts of physics might be integrated? Or do you have to get into the hybrid that philosophy/religion/physics has gone into today? Including why the speed of light can drop to 30mph in the fifth state of matter (Bose-Einstein Condensate) and even why it has been reversed? Or, why "discrete" particles have been split--and then proven to still be linked, by means no one can fathom?

"3) How many commandments where handed to us by Moses (approximetly!)"
Counting the lost third tablet?[g] Or ignoring the one most often incorrectly translated? (There's no commandment against killing.)

"4) England had 6 Kings named Georg. The last was George VI."
Georg versus George, huh?[g]

"6) Which person does not fit the pattern?
a. The Pope
b. Martin Luther
c. Jack the Ripper
d. Jesus"
Obviously the Pope is the only one who has not somehow promulgated mass murder and violence--openly--or had it done in his name, without protesting.

"8) Who build the great Pyramid of Giza?
a. Blackwater USA
b. The Pharaos
c. Lego"
Trick question, the Pharaohs of Egypt were royalty and didn't build anything with their own hands. The Pharaos sound like a 50's doo-wop group.

"9) What is the starting time of the 10 óclock news"
We don't have any 10 óclock anything. But we do have TV Nooze at ten o'clock. (Apostrophe, not accent.)

Extra question to collect additional points if you think you haven`t done well so far!

"Here's a list of the countries that the U.S. has bombed since the end of World War II: "

Bonus round: Name all of the illegal military incursions that the US has been officially involved in since WW2, and then name all of the legally declared wars that have been declared by Act of Congress in the same time period. Discussion of the War Powers Act is allowed and encouraged.

"In how many of these instances did a democratic government, ...."
In the 20th Century, name the number of times that governments fell to foreign military occupiers, resulting in a border change, absorbtion, or total government change of any sort. Civil wars, juntas, and similar domestic overthrows by force of arms may also be counted.

Sad state of affairs, isn't it?

**Alan Wheeler** · 20-10-2007, 12:20

Quote:

Q48 being a prime example. I still don't get it. Is it that "suction" creates lower pressure that is the equalized by atmospheric pressure pushing air in instead of suction "pulling" air in? Seems like splitting hairs,

Yeah it's a difficult one to get your head around. But if you keep the little saying in the back of your mind, "nature abhores a vacum" it helps. The piston moving down, creates a larger space and thus a lowering of air pressure. The valve opens and the air pressure on the other side is higher. Thus it flows into the chamber to fill the low pressure area. Air can be pressurised infinitly, but can only be "vacumed" till there is nothing. You can't make nothing any more nothing. So assuming the pressure on the outside is ~14PSI or 1 atmosphere, you could say there is a pressure of ~14PSI wanting to flow into the empty chamber. Due to restrictions and speed of piston, the air will never fully be replaced in the chamber and thus will always be working in a slight vacum. To increase the air quantity in the chamber, you need a greater flow of air or higher air pressure on the outside. Hence a turbo or supercharger, multi valves per cylinder, longer cam opening times etc etc.

Doghouse · 24-10-2007, 06:36

I'm a computer geek, so I just did it off of logic and got an 84! That was a cool test.

charley · 24-10-2007, 10:44

I got a 74% did it real quick tho made a few simple mistakes. I can however tear apart and rebuild almost anything. Maybe I better recheck all the 3 phase electric that I have run and the numerous machines that I have rebuilt in the past few years. HA