Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）

He cleaned the old machine and ________ the moving parts with a little mineral oil, hoping that it could work again. A: operated B: loaded C: lubricated D: distorted

He cleaned the old machine and _______ the moving parts with a little mineral oil, hoping that it could work again.( ) A: lubricated B: lubrication C: lubricate D: lubricating

He cleaned the old machine and ________ the moving parts with a little mineral oil, hoping that it could work again. A: twinkled B: lubricated C: traversed D: emancipated

Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（） A: Splash B: Gravity C: Pressure D: Bypa

For any piston ring to operate smoothly without scuffing, the ring must be_______. A: of a material harder than the cylinder line B: properly lubricated C: prevented from compressing D: prevented from rotating during engine operation

In a disk-type lubricating oil purifier, ____. A: The purifier driving gears are lubricated by the reclaimed B: Oil as it leaves the bowl all dirt and sludge are automatically discharged with the cooling water C: Sealing water must never be supplied until after oil is fed to unit D: Deterioration of the bowl ring gasket will cause the purifier to lose its water seal

From the pump, the oil is forced through the _____ and the oil cooler into the main oil gallery.The oil is fed from the _____, through individual passages, to the main crankshaft bearings and one end of the hollow camshaft.The cylinder walls and the teeth of many gears are lubricated by oil spray thrown off by the rotating _____.After the oil has served its purpose, it drains back to the ____ to be used again.