單項(xiàng)選擇題The cross-head shoes are white metal lined, grooves being cut horizontally on the face of the white metal to ensure （）.

A.an adequate supply of lube oil
B.an adequate supply of fuel oil
C.an adequate supply of turbine oil
D.an adequate supply of cylinder oil


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1.單項(xiàng)選擇題The cross-head shoes are white metal （）.

A.lining
B.lined
C.made
D.in

3.單項(xiàng)選擇題The crankshaft receives and transmits the full working power of the engine and is subjected to fluctuating （）.

A.bending stresses彎曲應(yīng)力
B.torsion stresses扭轉(zhuǎn)應(yīng)力
C.shear stresses剪應(yīng)力
D.All of the above

4.單項(xiàng)選擇題The crankshaft of diesel engine is supported by （）.

A.tension stretch
B.tie rods
C.through bolts
D.main bearings

5.單項(xiàng)選擇題The crankshaft is of the semi-built type, with the （） being shrunk into the forged or cast steel crank throws.

A.journal
B.crank-pin
C.main bearing
D.large end of connecting rod