单项选择题
A.during low loads
B.after proper oil viscosity is reached
C.during starting
D.after cleaning filters
单项选择题 If a main propulsion diesel engine hunts excessively at idle speed, you should （）
单项选择题 The amount of fuel delivered for each cycle must be in accordance with the engine load, and the same quantity of fuel must be delivered to each cylinder for each power stroke at that load.Which of the following statements describes this requirement?（）
单项选择题 Air bubbles in a hydraulic governor can cause （）