The oxygen indicator is an instrument that...

Question 1 / 205eccef9ebacbc34ba4d46596

Question 1 of 205eccef9ebacbc34ba4d46596

The oxygen indicator is an instrument that measures the __________.

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Question 1 of 20

5eccef9ebacbc34ba4d46596

The oxygen indicator is an instrument that measures the __________.

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🔍 Key Concepts

• Confined space entry testing order: oxygen, flammables, then toxics • Difference between an oxygen indicator and a combustible gas indicator • Normal safe oxygen range in air (about 21% oxygen)

💭 Think About

• Ask yourself: What is the FIRST and most basic thing you need to verify before entering any confined space? • Which instrument is used specifically to check for explosive gas levels, and how is that different from an oxygen indicator? • Do any of the choices describe a measurement that doesn’t match the name of the instrument given in the question?

✅ Before You Answer

• Verify which choice focuses directly on oxygen level rather than flammable gas or CO2. • Check that the description matches how you’d test a tank or hold for safe breathing levels before entry. • Eliminate any option that mainly describes lower explosive limit (LEL) or CO2, since those are usually separate instruments or sensor modes.

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Question 1 of 20

The oxygen indicator is an instrument that measures the __________.

amount of oxygen in the atmosphere of a confined space

amount of combustible gas as a percentage of the lower explosive limit in a confined space

concentration of CO2 as a percentage of oxygen in a confined space

None of the above

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Question 1 / 205eccef9ebacbc34ba4d46596

Question 1 of 205eccef9ebacbc34ba4d46596

The oxygen indicator is an instrument that measures the __________.

Back

Question 1 of 20

5eccef9ebacbc34ba4d46596

The oxygen indicator is an instrument that measures 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