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

Discussion

Which emissions does an evaporative control system address?

  • A.Fuel vapour escaping from the fuel system
  • B.Exhaust emissions, which contain unburnt fuel and are therefore the evaporative emissions of the vehicle
  • C.Crankcase gases
  • D.Hydrocarbon vapour generated within the tank and the fuel lines, which would otherwise escape to the atmosphere

Answer: A

The system captures vapour from the tank and lines rather than letting it escape. The last option describes exactly that scope, which makes it a correct and more detailed version of the same answer. The order in which the effects act is what decides the outcome, so it is worth establishing first. The shared behaviour explains why these belong together and the differences explain why both exist. Checking the units of each quantity catches a wrong formula before the arithmetic begins.

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

Post your comment

Please log in or register to post a comment.