Question 1427Deck General70% to pass
You have been carrying a liquid with flammable limits of 1% to 7% mixture with air. If your instructions say that no one shall enter the tank if the vapor concentration is over 15% of the LEL, what is the maximum allowable percentage of vapors for men to enter?
AI Explanation
The correct answer is A) 0.15%.
The reasoning is as follows:
The instructions state that no one shall enter the tank if the vapor concentration is over 15% of the Lower Explosive Limit (LEL). Since the flammable limits of the liquid are 1% to 7% mixture with air, the LEL is 1%. Therefore, 15% of the LEL is 0.15%, which is the maximum allowable percentage of vapors for men to enter the tank.
The other options are incorrect because:
B) 0.85% is too high and exceeds the 15% of LEL limit.
C) 1.05% is too high and exceeds the 15% of LEL limit.
D) 7.00% is the upper flammable limit, which is well above the 15% of LEL limit.
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