High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by （）.<br>A:engine overload<br>B:low combustion temperature<br>C:plugged fuel nozzle holes<br>D:excessive compression pressure

High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by （）.
A:engine overload
B:low combustion temperature
C:plugged fuel nozzle holes
D:excessive compression pressure

出自：海船船员证

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