单项选择题
A.Cylinder cover B.Main bearing C.The exhaust valve D.The piston movement
（） is secured by means of side-chock bolts and end-choc...
单项选择题（） is secured by means of side-chock bolts and end-chock bolts.
A.The bedplate B.The column C.The main bearing D.The double bottom
（） in what position the engine stops there will always ...
单项选择题（） in what position the engine stops there will always be at least one of the cylinders with its starting air valve open to admit compressed air to start the engine.
A.Because B.Owing to C.For D.No matter
（） for the camshaft gear train is taken from a spur gea...
单项选择题（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.
A.The driven gear B.The drive C.The grease D.The lubricating oil
