Micra fuel tank leak

It is liquid when pressurised. It is gas when unpressurised.

Not quite - The rate of evaporation, is entirely dependent on the concentration of the petrol fumes above the liquid surface. In a fuel tank with a tiny breather hole, evaporation of the petrol, into a gaseous state, will be absolutely minimal.

It's the very same process, when drying clothes, if the air has a high humidity/a high concentration of moisture in the air, then the drying/evaporation of the moisture, from the clothes will take much longer. Likewise, a small hole, in a petrol tank, above the fuel level, will ensure the fuel remains as a liquid, for a very long time - unless you live in DNJ's parallel universe.
 
Not quite - The rate of evaporation, is entirely dependent on the concentration of the petrol fumes above the liquid surface. In a fuel tank with a tiny breather hole, evaporation of the petrol, into a gaseous state, will be absolutely minimal.

It's the very same process, when drying clothes, if the air has a high humidity/a high concentration of moisture in the air, then the drying/evaporation of the moisture, from the clothes will take much longer. Likewise, a small hole, in a petrol tank, above the fuel level, will ensure the fuel remains as a liquid, for a very long time - unless you live in DNJ's parallel universe.
You will have to cut up your tractor tank to see. If I were to deign it, I would have a tube between the breather hole and the bottom of the tank. This reduces the evaporation surface to the cross section of the tube. The result from this thread shows that when the evaporation surface is the cross section of the tank, 3/4 of the fuel is lost in 6 to 7 months through a minor air leak.
 
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You will have to cut up your tractor tank to see. If I were to deign it, I would have a tube between the breather hole and the bottom of the tank.

As if any sane person would allow you to design anything of the sort.

The result from this thread shows that when the evaporation surface is the cross section of the tank, 3/4 of the fuel is lost in 6 to 7 months through a minor air leak.

This thread shows nothing of the sort - all it demonstrates, is your lack of understanding of basic principles, despite all of your many claims to the contrary.
 
You will have to cut up your tractor tank to see. If I were to deign it, I would have a tube between the breather hole and the bottom of the tank. This reduces the evaporation surface to the cross section of the tube. The result from this thread shows that when the evaporation surface is the cross section of the tank, 3/4 of the fuel is lost in 6 to 7 months through a minor air leak.
You know... While pretty much everything you've written on here has been clueless, ill-informed drivel, we can at least agree on something in this post. If you were to design a fuel tank, you probably WOULD have a tube between the breather and the bottom of the tank... I can genuinely believe that...
 
Is it under pressure when it’s in an open bucket?
It's under atmospheric pressure. In that case, the liquid is turning into gas as you could see from the earlier video when the wasps were gassed.
 
I can genuinely believe that...
Understandable, you are easy to believe in stuff when you cannot feel for stuff. There are other arrangements, one way vales are available for tanks. These are pressure activated and cannot be considered as open holes.
 
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