单项选择题
A.cetane number B.flash point C.viscosity D.setting point
Which cause of the following can lead to the engine not...
单项选择题Which cause of the following can lead to the engine not to start on air?（）
A.starting air pressure too high B.correct timing of starting air valves C.three of the starting valves stuck D.the turning gear disengaged
When turning the engine with turning gear, you should k...
单项选择题When turning the engine with turning gear, you should keep the indicator cocks （）.
A.attached to the indicators B.opened C.closed D.broken
When to remove scale from the cooling spaces, acid solu...
单项选择题When to remove scale from the cooling spaces, acid solution （） in the system can be tested from time to time by putting some on to a piece of lime.
A.strength B.dense C.percentage D.velocity
