USCG USCG Motor
Set 4 • Question #229 of 382
Launch Interactive Practice Room Why are heavy fuels not usually prone to the problems of microbiological infection?
A
Heavy fuels are subjected to better refining processes which prevent the formation of these growths.
B
Most heavy fuels contain chemicals which prevent the growth of fungi and other bacteria.
C
Microbiological infection does not affect marine fuel but rather the personnel who are involved with the handling, storage and purification of the fuel.
D
The necessary nutrients that the organisms feed on are in a more complex form and not available for microbial degradation.
✓ Correct Answer
USCG NMC Regulatory Explanation
Heavy Fuel Oil (HFO) must be preheated to achieve proper atomization viscosity (10-15 cSt) at the fuel injectors. Improper viscosity causes poor spray atomization, delayed ignition, and combustion chamber fouling.
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