Question

When conducting a flashpoint analysis, how long should the flame be applied to the vapor cup when in the lowered position?

A) 1 second
B) 3 seconds
C) 5 seconds
D) 10 seconds

Answer 1

In a flashpoint analysis, the flame should be applied to the vapor cup for 3 seconds when in the lowered position to ensure the accurate determination of the flashpoint.

Step-by-step explanation:

When conducting a flashpoint analysis, the correct duration for applying the flame to the vapor cup when in the lowered position is B) 3 seconds. This is standardized procedure in flashpoint testing to ensure consistency and accuracy in the results obtained. The flashpoint is the lowest temperature at which vapors of a volatile material will ignite, when given an ignition source. A too-short exposure might not provide enough energy to ignite the vapor, whereas too long could result in an inaccurate higher measurement.