Machine-translated by Google. Questions are authored in English.
Top

Discussion

Which permeation source did legislation later address?

  • A.Only joints
  • B.Slow diffusion of fuel molecules through plastic tanks and rubber hoses, which occurs even in a perfectly sealed system
  • C.Hydrocarbons passing through hoses and the tank wall
  • D.Nothing, since a sealed system loses no hydrocarbons except through a leak or an open valve at any time

Answer: C

Fuel molecules diffuse slowly through plastic and rubber. The last option explains exactly that mechanism, which makes it a correct and more instructive version. Barrier layers address it. The order in which the effects act is what decides the outcome, so it is worth establishing first. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. The shared properties explain why these belong to one family, and the differences explain why more than one exists.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.