On a hydrocarbon flammability chart the line...

Question 1 / 2066636ee728f7522a1c517d6b

Question 1 of 2066636ee728f7522a1c517d6b

On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen, lying tangent to the flammability range, is called the __________.

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Question 1 of 20

66636ee728f7522a1c517d6b

On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen, lying tangent to the flammability range, is called the __________.

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🔍 Key Concepts

• Hydrocarbon flammability diagram and what the axes represent (fuel %, oxygen %, and sometimes inert gas %). • The meaning of a line drawn from normal air conditions (about 21% oxygen, 0% fuel) to the edge of the flammable region. • Differences between terms like dilution, displacement, and oxygen limit in gas-freeing/inerting operations.

💭 Think About

• On the chart, think about what physically happens as you add inert gas to a tank that starts with normal air and hydrocarbon vapor. Which parameter is being reduced first and how does that appear as a line? • Which name best describes a line that is just tangent to the flammable envelope and represents the boundary where the mixture first becomes nonflammable? • Ask yourself: Is this line more about changing oxygen content, changing hydrocarbon content, or replacing one gas with another (displacement)?

✅ Before You Answer

• Identify which option’s wording matches a line from normal air (about 21% oxygen) to the flammability boundary rather than a limit at a single concentration point. • Confirm which term is typically used in tank inerting / gas-freeing discussions to describe movement along a path on the flammability diagram, not just a single upper or lower limit value. • Eliminate any choice that sounds like it refers to a single threshold value rather than a sloping line on the diagram.

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Question 1 of 20

On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen, lying tangent to the flammability range, is called the __________.

critical dilution line

minimum oxygen content line

critical displacement line

upper threshold limit

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Question 1 / 2066636ee728f7522a1c517d6b

Question 1 of 2066636ee728f7522a1c517d6b

On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen, lying tangent to the flammability range, is called the __________.

Back

Question 1 of 20

66636ee728f7522a1c517d6b

On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen, lying tangent to the flammability range, is called the __________.

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