In addition to lubricating, cylinder oil assists in forming

【名词&注释】

经济性(economy)、动力装置(power plant)、燃烧室(combustion chamber)、机动性(mobility)、基本要求(basic requirements)、续航力(endurance)、仔细观察(careful observation)

[单选题]In addition to lubricating, cylinder oil assists in forming a gas seal and contains （） which clean the cylinder liner.

A. additives
B. water
C. grease
D. acid solutio

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学习资料：

[单选题]对商船动力装置的基本要求是（）。

A. 经济性、可靠性
B. 机动性、续航力^(endurance)
C. 尺寸与重量
D. A+B+C

[单选题]柴油机吊缸时，不正确的做法是（）。

A. 起吊活塞组件之前应将缸套的磨台修磨光顺
B. 在拆卸下来的零件配合面上做好记号
C. 活塞组件吊出后应仔细观察^{(careful observation)}燃烧室零件的表面状态
D. 活塞组件吊出后应用木板将气缸孔口盖住

[单选题]An aluminum piston has lower inertia and higher coefficient of （） compared to that of cast iron.

A. viscosity
B. twisting moments
C. inertia
D. thermal expansio

[单选题]In an ordinary diesel engine the fuel injection begins （）

A. after TDC
B. before TDC
C. after BDC
D. before BDC

[单选题]In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt, the "piston ring belt" means （）.

A. piston crown
B. piston ring groove
C. piston skirt
D. piston ring area

[单选题]The main bearing shells are made of steel with a lining of bearing metal which may be white metal, copper-lead or aluminum-tin alloy What is the meaning of “which” in the sentence above?（）

A. main bearing shells
B. main bearing
C. steel
D. bearing metal

[单选题]The piston supporting body is mainly subjected to （） stress.

A. pushing
B. centrifugal
C. stretch
D. compressive

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