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单选题
Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce（）.
A
cold corrosion of the nozzles
B
fuel viscosity for better atomization
C
carbon accumulation on the nozzles
D
fuel detonation in the cylinders
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单选题Injectors for use with heavy fuel oil must be cooled by either water or light oil to （）A
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单选题When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?（）A
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