HL 1 questions and answers Graded A+

HL 1 questions and answers Graded A+ Fires or explosions may only occur when ? basic condition(s) exist(s). 3 Which of the following materials would be found in one of the three location classes of the class/division system? I. Combustible dust II. Combustible fibers/flyings III. Combustible liquid-produced vapors IV. Flammable gases V. Flammable liquid-produced vapors VI. Ignitible fibers/flyings All of the above 500.1 The possibility that a gas mixture may be above the upper flammable limit does not ensure that the gas is safe. The gas must first pass through the flammable range as its ? increases from being below the lower flammable limit to a concentration above the upper flammable limit. concentration A source of ignition is all that is needed to create a fire or an explosion when an ignitible or explosible mixture of a flammable gas or a combustible dust is mixed with air or oxygen in proportions that create an ignitible or expl