单项选择题
A.an increased flash point
B.higher lube oil pressures
C.an increased viscosity
D.lower lube oil pressures
单项选择题 When a fuel injection nozzle overheats, which of the problems listed can be expected?（）
单项选择题 Which of the following conditions could be a cause of excessive fuel dilution of diesel engine lube oil?（）
单项选择题 When the opening pressure of a diesel engine fuel injector is greater than that specified by the engine manufacturer, which of the following problems can be expected?（）