For the budding mechanics

[Worjorj]

Something to pass the time on a Friday afternoon whilst clock-watching.

http://www.forddoctorsdts.com/quizzes/MechanicalAptitude.php

88% for me

[InSanCen]

80%, which worries me... should have done much better than that :(

[lowrider]

Bugger that, lifes to short :confused:

[John Hopkins]

I only got 76% still the fan question is open to interpretation..I thought the suction caused air to enter the engine and on the balloons I thought all outside pressure would be at atmospheric pressure...didn't allow for surface area...dont ask me to design anything... :D John

[devon-tony]

82% bit bad really, be good if it told you which ones you got wrong

[John Hopkins]

82% bit bad really, be good if it told you which ones you got wrong

It does...you can click on review, or something

[Worjorj]

You can find out your answers by clicking on the magnifying glass at the end of the quiz. It allows you to review your answers, showing the correct answers too.

[STEViE]

80%, passed a bit of time. I liked physics back at school, it don't neccessarilly mean I'm intelligent tho John does it.

[bunbag]

hands up blew it :(

[shaggy696969]

In th event of making myself look stupid Again I dissagree with their answer, th way I was taught the 4 cycles of the internal combustion engine were suction compression ignition and exhaust, or comonly refferd to as suck squeeze bang push, ................. But they say Atmospheric pressure forces Air mixture in, How does that work then ? Go on engineering or all the other clever peeps, explain it to me ?

http://i23.tinypic.com/iej6zn.jpg

[Freak]

The vacuum caused by the displacement of the piston is only replenished up to the pressure of the atmosphere... to get even more air into the same space you need a turbo to squeeze it in above 1 atmosphere. If you want even more air you need to cool it down, hense intercoolers. The ratio of fuel to air mixture remains around 12 or 13 parts to one (ish) as that's the most efficient air to fuel burn ratio... you just have much more of it for a bigger bang.

[shaggy696969]

I understand the principals of turbo and hypercharger even the phalacy of the Kuryaken Hypercharger's placebo effect, but it is the suction in the first place which then n causes the gasses to be drawn in surely.

[Freak]

Stop thinking of it as suction... it's vacuum ;)

[pyro]

Mitigating circumstances, been on the road since 5am, got home (20:45) and downed half a bottle of wine and then rushed through it.... only got 70%...

[kiffer38]

In th event of making myself look stupid Again I dissagree with their answer, th way I was taught the 4 cycles of the internal combustion engine were suction compression ignition and exhaust, or comonly refferd to as suck squeeze bang push, ................. But they say Atmospheric pressure forces Air mixture in, How does that work then ? Go on engineering or all the other clever peeps, explain it to me ?

http://i23.tinypic.com/iej6zn.jpg
as the piston decends, the Atmospheric pressure, in the cylinder drops, making the Atmospheric pressure outside the cylinder higher than in the cylinder, and so, pushing the gas in

[shaggy696969]

Ok got it, both internal and external pressures are regarded as atmospheric.

[kiffer38]

Ok got it, both internal and external pressures are regarded as atmospheric.
bingo :D

[johnr]

I understand the principals of turbo and hypercharger even the phalacy of the Kuryaken Hypercharger's placebo effect,


lol :D :D

[noizy git]

I got 96% although it probably helps that I've been working in engineering since '73 :D

[shaggy696969]

So your name should be Noizy OLD Git really then :D

[Dougie]

So why not 100% then? :p :p :p

[noizy git]

So your name should be Noizy OLD Git really then :D

WHAT!!! I'm only in my 50's!!! Just getting to my prime really :D
Dougie-I would never admit to 100% cos that would be showing off ;)

[Feel the Wind]

78% and I agree that some of the answers are questionable. I am still not convinced on the piston and atmospheric pressure question...so I come to the conclusion it's a load of bollox.......and got another beer :D

[cherryB]

Well I'm not ashamed to say I failed cos I actually got 60%. considering I didnt do physics at school and I know sod all about engines of any kind, I was quite pleased with my score. :)

However, I dont think I shall be opening a garage any time soon :rolleyes:

[John Hopkins]

well that was a bit of a surprise...I expected people to do it once as a dry run and then post their cribbed answers...'it is a good little test..as good as a crossword..and fair do..I got more wrong than I should have...some I didnt know..I didn't even understand one or two of the words..and one of the pulley ones I should have got but was overconfident..thanks for posting it..It did me a lot of good to know I'm still thick... :D John

[skida]

I am not really mechanical, but with a bit of remembered physics, a bit of cog-tooth counting and some common sense, I got 88%. I got ....er...... sucked into the suction mistake, too. :rolleyes:

[Rhythm Addict]

I got 86% but decided not to find out what I got wrong because it reminded me too much of physics lessons at school. :(

[willie2006]

got to number 9 then gave up. lets face it, somones gota keep the garages in business.

[johnr]

94% easy really, but the atmospheric question was very badly written.

[Worjorj]

That question was a bit pedantic.
In a similar vein, a horse never actually pulls a cart; it pushes it!