單項選擇題Lubricating systems for diesel engines are usually designed to initially provide lube oil to the engine （）

A.camshaft beatings
B.main bearings
C.piston crowns
D.cylinder walls


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題The expansion tank in a diesel engine closed freshwater cooling system is located at （）

A.the highest point in the system
B.the lowest point in the system
C.near the floor
D.plate level or near the tank top level

2.單項選擇題On most modern diesel engines, the main and connecting rod bearings receive their lubricating oil by （）.

A.banjo feed
B.splash feed
C.gravity feed
D.pressure feed

3.單項選擇題The main function of tie rods in the construction of large, low speed diesel engines is to（）.

A.stiffen the bedplate in way of the main bearings to increase the engines longitudinal strength
B.accept most of the tensile loading that results from the firing forces developed during operation
C.mount the engine frame securely to the hull to prevent shaft coupling misalignment
D.connect the crosshead solidly to the piston rod

4.單項選擇題The intake valves in a diesel engine are reseated by （）.

A.cam followers
B.push rods
C.combustion gases
D.valve springs

5.單項選擇題The outlet from an expansion tank of a closed freshwater cooling system should be piped to the （）.

A.cylinder head water outlet header
B.cylinder jacket inlet main
C.heat exchanger inlet connection
D.jacket water pump suction line