Which of the following conditions is an...

Question 1 / 270705eccef9ebacbc34ba4d465b1

Question 1 of 270705eccef9ebacbc34ba4d465b1

Which of the following conditions is an important consideration to remember when using a combustible gas indicator?

Question 1 of 27070

Which of the following conditions is an important consideration to remember when using a combustible gas indicator?

🔍 Key Concepts

• Combustible gas indicators (CGIs) measure flammability, not toxicity • Effect of oxygen-deficient atmospheres on gas detection instruments • Difference between what is measured right at the sampling point vs. the whole space

💭 Think About

• Ask yourself whether a combustible gas indicator tells you anything about how poisonous a vapor is, or only about how close it is to its lower explosive limit (LEL). • Consider how a combustible gas indicator actually draws in its sample: does it measure conditions everywhere in a tank/space, or only where the sample is pulled from? • Think about what most catalytic-bead type CGIs need in order to burn the sample gas on the sensor—what role does oxygen level play?

✅ Before You Answer

• Verify whether CGIs are designed to measure toxicity or flammability/LEL only. • Check if proper operation requires a normal oxygen concentration, and what happens if oxygen is too low. • Confirm that the reading represents conditions only where the air is sampled, not automatically the entire compartment.

Question 1 of 27070

Which of the following conditions is an important consideration to remember when using a combustible gas indicator?

They detect vapor at the sample point only.

They do not work properly in oxygen deficient atmospheres.

Any movement of the needle indicates an unsafe condition specifically related to the toxicity of petroleum vapors present.

All of the above.

Question 1 / 270705eccef9ebacbc34ba4d465b1

Question 1 of 270705eccef9ebacbc34ba4d465b1

Which of the following conditions is an important consideration to remember when using a combustible gas indicator?

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Question 1 of 27070

Which of the following conditions is an important consideration to remember when using a combustible gas indicator?