Ford mechanical aptitude test; http://www.forddoctorsdts.com/quizzes/M ... titude.php
I managed 80 which is a pass
Not sure which questions I got wrong
It definitely gave the old brain a workout and its the only one I've got
On the one with multiple pulleys I worked out the correct answer then clicked the wrong option . The other three I'm blaming on badly worded questions...
Alex Holden - http://www.alexholden.net/
If it doesn't work, you're not hitting it with a big enough hammer.
74% I blame the americans for calling petrol gasoline...
Onne van der S. MMOCno 60520 Moderator
2dr 1971 White DAF 55 (with hopefully a 1600cc engine soon)
2dr 1973 Bergina (DAF 44)
2dr Estate 1975 DAF 46 in red
2dr saloon 1972 DAF 44 in Mimosa
Is the air sucked in or pushed in by atmospheric pressure? I think both are right!
That one got me too - is the piston actually sucking or is it just the pressure difference that forces air to occupy the empty space?
(vacum abhoration and all that)
I went for the 'atmo' answer myself.
I went for sucking - if the engine simply opened the inlet valve and didn't pull the piston down, atmospheric pressure wouldn't push the air in, would it? You'd have roughly atmospheric pressure on both sides of the piston and nothing would happen.
Alex Holden - http://www.alexholden.net/
If it doesn't work, you're not hitting it with a big enough hammer.
alex_holden wrote:I went for sucking - if the engine simply opened the inlet valve and didn't pull the piston down, atmospheric pressure wouldn't push the air in, would it? You'd have roughly atmospheric pressure on both sides of the piston and nothing would happen.
Sadly I went back and checked, it is in fact atmosheric pressure that charges the chamber.
This message board is like a family - you can't choose the other members!! But remember engine oil is thicker than water.