A combustible gas indicator will operate...

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Question 1 of 205eccef9ebacbc34ba4d465ef

A combustible gas indicator will operate correctly ONLY when the __________.

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5eccef9ebacbc34ba4d465ef

A combustible gas indicator will operate correctly ONLY when the __________.

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🔍 Key Concepts

• Combustible gas indicator purpose – what it actually measures in an atmosphere • Explosive limits (LEL vs UEL) – lower vs upper explosive limits for flammable gases • Role of oxygen – whether the instrument (and an explosion) needs a certain oxygen percentage to work

💭 Think About

• Think about when a gas/air mixture can actually burn or explode: what range of concentration is required relative to the lower and upper explosive limits? • Consider whether a combustible gas indicator is designed to work in a space with no oxygen at all, or if it requires some oxygen present. • Ask yourself if normal atmospheres always have some CO₂ in them — would a typical instrument be designed to require a compartment completely free of CO₂?

✅ Before You Answer

• Be clear on the difference between Lower Explosive Limit (LEL) and Upper Explosive Limit (UEL) and which one is typically used for calibration and readings. • Verify in your notes whether a combustible gas indicator will still function correctly in oxygen-deficient atmospheres. • Consider whether CO₂ is normally present in air and whether its presence alone would stop the instrument from working.

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Study

Question 1 of 205eccef9ebacbc34ba4d465ef

A combustible gas indicator will operate correctly ONLY when the __________.

Back

Question 1 of 20

5eccef9ebacbc34ba4d465ef

A combustible gas indicator will operate correctly ONLY when 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

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