单项选择题 On a diesel engine equipped with an isochronous governor, if the “speed droop” control is reduced to the “zero” setting, the engine （）

单项选择题 Proper operation of the main engine reduction gear set requires the operation to monitor （）

单项选择题 Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinderIf the cooling water temperature from all cylinders begins to rise above normal, you should suspect （）