Question 638Deck Safety70% to pass
The atmosphere in a tank is too lean if it is _______________.
AI Explanation
The correct answer is C) incapable of supporting combustion because the hydrocarbon content is below the LFL (Lower Flammable Limit).
In a tank, the atmosphere is considered too lean if the hydrocarbon content is below the Lower Flammable Limit (LFL). This means there is insufficient fuel present to support combustion, making the atmosphere incapable of supporting a fire. The other options are incorrect because A) refers to an atmosphere that is too rich, and B) and D) do not accurately describe a too-lean atmosphere.
Related Questions
#636 Ventilation systems connected to a compartment in which a fire is burning are normally closed to prevent the rapid spread of the fire by _______________.#637 The atmosphere in a tank is too rich when it is _______________.#639 What is the generally accepted method of determining whether the atmosphere within a cargo tank is explosive, too rich, or too lean to support combustion? #640 The explosive range of petroleum vapors mixed with air is _______________.#641 Small quantities of flammable liquids needed at a work site should be _______________.