How good is YOUR mechanical knowledge?

**devnull** · 24th October 2007, 14:31

92%

Could have a second career if I ever get tired of building networks

**Brett** · 24th October 2007, 15:00

78% but I rushed it. Will take some time when I have some and see how I can do.

**MacD** · 24th October 2007, 18:26

490 points, 98%

I always wanted to be an engineer...

The piston question is similar to the usual arguement about centrifugal force, it all depends on your point of view, but the generally accepted scientific/engineering principle is that the air flows into the cylinder due to the pressure differential, ie. higher atmospheric pressure "pushes" the air in. Hence the use of turbos to incease manifold pressure.

**boostin** · 24th October 2007, 19:35

80% wow amazing

**Mom** · 24th October 2007, 19:58

I failed........hardly surprising, but wow I got 62%!!!!!!!!!!!!!!

I rock!

**JeremyW** · 24th October 2007, 20:36

Sweet 88%. Yea the engine sucking one got me too but it does make sense when you think of it... A vacuum is a pressure lower than atmospheric and hence the atmosphere 'pushes' the air in.

**Sanx** · 24th October 2007, 21:45

94%, and I'm not a mechanic. I'm an out-of-work IT contractor. Perhaps I should think about a career-change.

Except they forgot the main mechnics question:

Q51. You disassemble and then reassemble a complicated mechanical object. Expressed as a percentage of the toal number of discrete components in the object, how many is it acceptable to have left lying on the floor when you've finished.

a) 0%
b) 5%
c) 10%
d) 50%. She'll be right, mate!

**Conquiztador** · 25th October 2007, 01:31

94%. That was interesting.

Got the sucking wrong in the motor. Sucks!

Got the fan direction wrong. Was thinking to deeply here...

Also the pressure of the water in the hose with 2 pipes up. Did not think there was gonna be any water going up in the second pipe.

Ah well.

**Bass** · 25th October 2007, 11:38

100%

Well bugger me!
Perhaps I should become an engineer.

Hang on a sec............I already am.

That might have something to do with it then.......home town advantage.

I guess it's gotta be useful sometimes

**Ocean1** · 25th October 2007, 11:45

Originally Posted by Bass

100%

Well bugger me!
Perhaps I should become an engineer.

Hang on a sec............I already am.

That might have something to do with it then.......home town advantage.

I guess it's gotta be useful sometimes

Should bloody well think so, it's a test for Ford mechanics.

*Silently glosses over the fact that he missed one...*

**judecatmad** · 25th October 2007, 12:02

74%.

Not bad for an Insurance Underwriter (who completely failed the first year of the Physics degree she started before defecting to Chemistry!)

**Fooman** · 25th October 2007, 13:44

Originally Posted by sAsLEX

You find a reference to back up your story!

You've made me open up a book for the first time in about 10 years:

B.S. Massey, Mechanics of Fluids, 6th Ed, 1989 Chapman & Hall

Chapter 13, Unsteady Flow

See the definition of inertia pressure.

(First few pages of Massey attached)

Cheers,
FM

**steveb64** · 25th October 2007, 14:32

Originally Posted by Fooman

You've made me open up a book for the first time in about 10 years:

B.S. Massey, Mechanics of Fluids, 6th Ed, 1989 Chapman & Hall

Chapter 13, Unsteady Flow

See the definition of inertia pressure.

(First few pages of Massey attached)

Cheers,
FM

You win.

Also got this off forum (GSresources) I originally got the link from : A Vacuum DOES NOT pull air into the cylinder. The atmospheric pressure just rushes in to FILL that vacuum.