After each reading of an oxygen indicator,...

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Question 1 of 2066636eec28f7522a1c51cade

After each reading of an oxygen indicator, the instrument should be purged with __________.

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Question 1 of 20

66636eec28f7522a1c51cade

After each reading of an oxygen indicator, the instrument should be purged with __________.

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🔍 Key Concepts

• Oxygen indicators are used to measure the percentage of oxygen in a space before entry • After using any gas-detection instrument, you want to be sure it gives an accurate reading for the next measurement • Think about what kind of gas (or mixture) would safely clear out any remaining sample and leave the instrument ready to measure a new space

💭 Think About

• Which option would help prevent contaminating the next reading with leftover gas from the previous sample? • Which gas or mixture is safest and most commonly available on board for preparing instruments for the next test? • Would any of the choices themselves affect or distort an oxygen reading if left inside the instrument?

✅ Before You Answer

• Make sure the purging medium will NOT alter oxygen readings by adding or removing oxygen unnaturally • Confirm that the choice is non‑corrosive and safe for the instrument components • Check which option would be readily available everywhere on the vessel, regardless of which compartment you are testing

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Question 1 of 2066636eec28f7522a1c51cade

After each reading of an oxygen indicator, the instrument should be purged with __________.

Back

Question 1 of 20

66636eec28f7522a1c51cade

After each reading of an oxygen indicator, the instrument should be purged with __________.

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