1. Vapor density of a chemical which is kept in a tank is 1.60. If there is an accidental leak from the tank into the work area, would this gas be concentrated along the ceiling or along the floor? Give full explanation.
2. Lower Flammable Level (LFL) for a gas is 2 % and Upper Flammable Level (UFL) is 7 %. If a room ventilation system keeps the concentration level of the flammable gas at 5 %, what would happen when there is a source of ignition in the room? Explain.