Reid vapor presssure is _____

 Reid vapor presssure is _____

1) exerted by liquid cargo on the sides of a tank 
2) exerted by  liquid cargo
3) the lowest temperature and pressure that will cause a flammable liquid to give off vapors
4) a measurement of the amount of the flammable vapors given off by a liquid at a certain temperature 

Ans______4) a measurement of the amount of the flammable vapors given off by a liquid at a certain temperature