You have been carrying a liquid with...

Question 1 / 2066636ee728f7522a1c51763e

Question 1 of 2066636ee728f7522a1c51763e

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?

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🔍 Key Concepts

• Lower Explosive Limit (LEL) and what it represents • How to calculate a percentage of the LEL when the LEL is expressed as a gas concentration in air • Difference between absolute vapor concentration (%) and percent of the LEL

💭 Think About

• First, determine what the actual LEL value is in percent based on the flammable limits given in the question. • Next, calculate what 15% of that LEL value would be as an absolute vapor percentage in air. • Compare your calculated value with the multiple-choice options to see which one matches your result.

✅ Before You Answer

• Verify you are using the lower flammable limit (not the upper) when interpreting the LEL. • Make sure you correctly convert 15% of the LEL into an absolute concentration percentage (multiply, don’t add or subtract). • Double‑check that your final number is less than the LEL value itself, since 15% of the LEL must be a smaller concentration than the full LEL.

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Question 1 of 20

0.15%

0.85%

1.05%

7.00%

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Question 1 / 2066636ee728f7522a1c51763e

Question 1 of 2066636ee728f7522a1c51763e

Back

Question 1 of 20

66636ee728f7522a1c51763e

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed