单项选择题
A.increased fuel consumption
B.increased feed water consumption
C.fuel pump failure
D.combustion control system failure
单项选择题 Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?（）
单项选择题 The procedures recommended for auxiliary boilers having high salinity include （）.
单项选择题 Excessive alkalinity of the water in an auxiliary boiler can cause （）.