Question 574Deck General70% to pass
Which statement about the carriage of coal is true?
AI Explanation
The correct answer is D) Freshly worked coal is more dangerous than weathered coal.
The reason this is the correct answer is that freshly mined or worked coal is more susceptible to spontaneous combustion compared to coal that has been exposed to air and weathered. Freshly mined coal contains a higher percentage of volatile matter and is more reactive, increasing the risk of spontaneous heating. As coal weathers over time, the volatile content decreases, making the coal less prone to spontaneous ignition.
The other options are incorrect because: A) The risk of spontaneous combustion does not necessarily decrease after 72 hours of loading; B) Coal does not absorb nitrogen from the air to cause spontaneous heating; and C) Dry coal is actually more liable to spontaneous heating than wet coal, as moisture can inhibit the oxidation process that leads to spontaneous combustion.
Related Questions
#572 While loading a cargo of grain, your vessel develops a list to starboard. This will be corrected by _______________.#573 Atmospheres laden with coal dust or grain dust caused by loading these cargoes _______________.#575 What does item "A" refer to in illustration D045DG of a 30-ton pedestal crane? #576 Spontaneous heating of coal rapidly accelerates at the approximate minimum temperature of _______________.#577 Ship's officers should check every cargo compartment after it is filled with bulk grain to ensure _______________.