Question

difference betwere cleveland
open cup, Pensky
Marten closed cup and
and Abel's closed
cup
Apparates.
Page No.
​

Answer 1

Answer:

Closed cup testers give lower values for the flashpoint than open-cup testers (typically 5–10 K) and are a better approximation to the temperature at which the vapour pressure reaches the "lower flammable limit" (LFL).

Explanation:

In closed cup tests the sample is tested inside a closed vessel – the lid is sealed and the ignition source is brought into the vessel, so it is completely separate from the outside atmosphere. This type of test gives a good simulation of the conditions inside a fuel tank.