Question 174Safety & Environmental - QMED
70% to passA tank has been sealed and unventilated for a long period of time. Which of the following statements is true?
AThe tank is especially dangerous to enter.
BCarbon monoxide is present.
CWater vapor present when the tank was sealed has oxidized.
DThe tank is safe to enter.
AI Explanation
The correct answer is A) The tank is especially dangerous to enter. Explanation: A sealed and unventilated tank that has been left undisturbed for a long period of time can develop a dangerous atmosphere inside, often containing toxic or flammable gases. These gases can displace breathable air, leading to an oxygen-deficient environment that poses a serious risk to anyone entering the tank. The lack of ventilation prevents the dissipation of these hazardous gases, making the tank extremely dangerous to enter without proper precautions and testing. The other answer choices are incorrect, as they do not accurately describe the hazardous conditions that can arise in a sealed, unventilated tank.
Related Questions
Q168:Following a grounding, what action should be performed prior to the use of the m... Q55:Water ballast placed in a tank that has been crude oil washed, but not water rin... Q183:If the items shown in the illustration are burning, this fire would be a Class _... Q226:Which extinguishing agent is most likely to allow reflash as a result of not coo... Q193:If you wish to initiate a station-to-station call over a sound-powered telephone...
Ready to test your knowledge?
Take a Safety & Environmental - QMED Practice ExamOfficial Resources