Which of the following conditions will cause...

Question 1 / 2066636ee728f7522a1c517bb1

Question 1 of 2066636ee728f7522a1c517bb1

Which of the following conditions will cause a combustible gas indicator to become inoperative or give erroneous readings?

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Question 1 of 20

66636ee728f7522a1c517bb1

Which of the following conditions will cause a combustible gas indicator to become inoperative or give erroneous readings?

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🔍 Key Concepts

• Combustible gas indicator (explosimeter) operation – it actually burns a small sample on a heated filament • Definitions of lower explosive limit (LEL) and upper explosive limit (UEL) for flammable gases • Effect of oxygen content and inert gas (like CO2 or nitrogen) on whether a mixture will burn

💭 Think About

• Ask yourself: Under which condition would the instrument no longer be able to burn the sample gas on its sensor? • Which option describes a situation where the gas mixture is outside the flammable range, so combustion on the sensor can’t occur normally? • Look at each choice and decide: does this condition make it easier or harder for the gas sample to burn on the sensor element?

✅ Before You Answer

• Verify which explosive-limit term (LEL vs UEL) applies to a mixture that is too rich to burn. • Check that a combustible gas indicator requires sufficient oxygen to work correctly – so would ‘sufficient oxygen’ tend to help or hinder operation? • Confirm whether being “free of CO2” would by itself stop the sensor from operating, compared to a condition where the fuel concentration is beyond the flammable range.

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Question 1 of 20

Which of the following conditions will cause a combustible gas indicator to become inoperative or give erroneous readings?

Inerted content of the atmosphere is less than the lower explosive limit

Compartment to be tested is free of CO2

Atmosphere has sufficient oxygen

Hydrocarbon content of the atmosphere is above the upper explosive limit

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Question 1 / 2066636ee728f7522a1c517bb1

Question 1 of 2066636ee728f7522a1c517bb1

Which of the following conditions will cause a combustible gas indicator to become inoperative or give erroneous readings?

Back

Question 1 of 20

66636ee728f7522a1c517bb1

Which of the following conditions will cause a combustible gas indicator to become inoperative or give erroneous readings?

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