Which is the best way to ensure adequate...

Question 1 / 270705eccef9ebacbc34ba4d461ba

Question 1 of 270705eccef9ebacbc34ba4d461ba

Which is the best way to ensure adequate oxygen is present for safe entry into a seldom used cargo tank?

Question 1 of 27070

Which is the best way to ensure adequate oxygen is present for safe entry into a seldom used cargo tank?

🔍 Key Concepts

• Enclosed space entry procedures and why oxygen levels must be measured, not assumed • Difference between ventilation (adding fresh air) and atmospheric testing (measuring what’s there) • Limitations of a combustible gas indicator compared to an oxygen indicator

💭 Think About

• Before entering a rarely used cargo tank, what TWO separate steps are normally required by enclosed space entry procedures? • Does simply opening a tank or looking at surfaces inside give you any measured information about oxygen percentage? Why or why not? • What is the specific instrument designed to measure oxygen concentration, and how does that differ from instruments designed for flammable gases only?

✅ Before You Answer

• Verify which option includes both active ventilation with fresh air AND direct measurement of oxygen level. • Check whether any choice relies only on visual clues or time with hatch open instead of an actual test instrument. • Confirm which instrument can only detect flammable gases and may not show low oxygen conditions, versus one that directly measures oxygen percentage.

Question 1 of 27070

Which is the best way to ensure adequate oxygen is present for safe entry into a seldom used cargo tank?

Test tank atmosphere with a combustible gas indicator.

Observe the amount of rust deposited on the tank's surface.

Ventilate the tank with fresh air and test with an oxygen indicator.

Open the manhole cover for approximately ten minutes.

Question 1 / 270705eccef9ebacbc34ba4d461ba

Question 1 of 270705eccef9ebacbc34ba4d461ba

Which is the best way to ensure adequate oxygen is present for safe entry into a seldom used cargo tank?

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Question 1 of 27070

Which is the best way to ensure adequate oxygen is present for safe entry into a seldom used cargo tank?