单项选择题
A.A variable pitch propeller B.A variable pitch nut C.A fixed pitch parallel D.A fixed pitch screw
（） is fully floating in both connecting rod small end a...
单项选择题（） is fully floating in both connecting rod small end and the piston skirt.
A.The piston rod B.The cross head pin C.The gudgeon pin D.The crank-pin
（） is arranged for cleaning the lubricating oil in the ...
单项选择题（） is arranged for cleaning the lubricating oil in the system and clean oil can be provided from a storage tank.
A.A filter B.A centrifuge C.A distiller D.A generator
（） is a source of power by which the diesel engine may ...
单项选择题（） is a source of power by which the diesel engine may operate.
A.Water energy B.Electrical energy C.Chemical energy D.Heat energy
