If personnel are required to enter a cargo...

Question 1 / 270705eccef9ebacbc34ba4d465d8

Question 1 of 270705eccef9ebacbc34ba4d465d8

If personnel are required to enter a cargo tank that has not been certified as "gas free", __________.

Question 1 of 27070

If personnel are required to enter a cargo tank that has not been certified as "gas free", __________.

🔍 Key Concepts

• Enclosed space entry hazards in cargo tanks • Behavior of petroleum vapors (heavier than air, toxicity, flammability) • Purpose and use of self-contained breathing apparatus (SCBA)

💭 Think About

• How does the fact that a tank is NOT certified "gas free" affect assumptions about oxygen level and toxic/flammable vapors? • Are there any conditions (location in the tank, weather, or short time exposure) that reliably make an uncertified tank safe to breathe in? • What is the safest general rule mariners are trained to follow before entering any space that may contain fuel vapors or lack oxygen?

✅ Before You Answer

• Verify what "gas free" actually means in tanker operations and enclosed space entry procedures • Consider whether petroleum vapors can stratify, move, or be stirred up, even if you start at the top or only stay a short time • Confirm standard practice: if air quality is not tested and certified safe, what respiratory protection is required for entry?

Question 1 of 27070

If personnel are required to enter a cargo tank that has not been certified as "gas free", __________.

entry without a breathing apparatus may be made at the top of the tank, since petroleum vapors are heavier than air

a person may work safely without breathing apparatus in cold weather, since the vapors are less volatile

breathing apparatus would not be necessary, if expected to be in the tank for only a short period of time

self-contained breathing apparatus should always be used

Question 1 / 270705eccef9ebacbc34ba4d465d8

Question 1 of 270705eccef9ebacbc34ba4d465d8

If personnel are required to enter a cargo tank that has not been certified as "gas free", __________.

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Question 1 of 27070

If personnel are required to enter a cargo tank that has not been certified as "gas free", __________.