单项选择题 What is the crank angle between any two crank throws in the firing order of a four-stroke/cycle, in line, eight cylinder diesel engine?（）

单项选择题 Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）.

单项选择题 In order to reverse the rotation of a two-stroke/cycle loop scavenged, direct reversing, propulsion diesel engine, the cam positions must be changed for the （）.