A fuel tank on a barge has been certified by...

Question 1 / 270705eccef9ebacbc34ba4d465de

Question 1 of 270705eccef9ebacbc34ba4d465de

A fuel tank on a barge has been certified by a marine chemist as being "Safe for Men" and "Safe for fire." This condition may change if ___________.

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Question 1 of 27070

A fuel tank on a barge has been certified by a marine chemist as being "Safe for Men" and "Safe for fire." This condition may change if ___________.

🔍 Key Concepts

• Marine chemist certificates and what “Safe for Men” and “Safe for Fire” actually mean • How vapors and flammable atmospheres can change over time inside confined spaces • The effect of temperature changes and contamination on tank atmospheres

💭 Think About

• Think about what could cause the atmosphere in a certified-safe tank to become unsafe again, even without anyone entering it • Consider whether a change in contents, a change in residual material (muck/sludge/scale), or a change in conditions around the tank (like temperature) could alter vapor levels • Ask yourself: are these potential causes independent, or could more than one of them reasonably affect the safety status?

✅ Before You Answer

• Verify which options involve new or additional vapors being introduced or released into the tank • Check how temperature can influence vapor pressure and the release of flammable or toxic gases • Before choosing, ask: could each listed factor realistically change a tank from safe to unsafe after certification?

Question 1 of 27070

A fuel tank on a barge has been certified by a marine chemist as being "Safe for Men" and "Safe for fire." This condition may change if ___________.

a product leaks into the certified tank

muck, sludge, or scale in the tank give off additional vapors

the ambient temperature changes

all of the above

Question 1 / 270705eccef9ebacbc34ba4d465de

Question 1 of 270705eccef9ebacbc34ba4d465de

A fuel tank on a barge has been certified by a marine chemist as being "Safe for Men" and "Safe for fire." This condition may change if ___________.

Back

Question 1 of 27070

A fuel tank on a barge has been certified by a marine chemist as being "Safe for Men" and "Safe for fire." This condition may change if ___________.