In an engine with a pot-shaped piston, some lubricating oil

【名词&注释】

增压器(turbocharger)、专用工具(special tool)、压力表(pressure gauge)、穿透性裂纹、柴油机燃烧室(combustion chamber of diesel engine)、冷却水压、曲轴箱油(crankcase oil)

[单选题]In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a （） in the crankshaft to the bottom end bearing andthen up a connection rod to the gudgeon pin.

A. telescopic pipes
B. large bore
C. drilled passage
D. tied rod

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学习资料：

[单选题]柴油机运转中，根据（）现象可迅速判断柴油机燃烧室零件是否产生穿透性裂纹。Ⅰ.冷却水压力表指针波动；Ⅱ.冲车时有水珠喷出；Ⅲ.缸壁面有锈痕；Ⅳ.膨胀水柜水位变化；Ⅴ.曲轴箱油^{(crankcase oil)}位升高。

A. Ⅰ＋Ⅳ＋Ⅴ
B. Ⅰ＋Ⅱ＋Ⅴ
C. Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ＋Ⅴ
D. Ⅱ＋Ⅲ＋Ⅳ

[单选题]增压器发生故障后采用拆除转子的措施，不仅防止事故扩大，更重要的是保护了转子，但缺点是（）。

A. 破坏了与柴油机联合装置的工作
B. 需要随机专用工具和专用盖板
C. 工作量大
D. 废气仍通过使壳体受到高温作用

[单选题]曲折反映了两相邻轴轴心线呈（）的状态。

A. 平行
B. 不重合
C. 相交且法兰中心未对准
D. 相交且法兰中心对准

[单选题]The four strokes are called suction, compression, expansion and exhaust, but only （） stroke provides the power to drive the ship.

A. suction
B. compression
C. expansion
D. exhaust

[单选题]When the follower is on the base circle of the cam, the pump plunger is at the （） of its stroke.

A. top
B. middle
C. bottom
D. any of the above

[单选题]Turbulence in a diesel engine cylinder is of major importance in providing （）.

A. proper fuel metering
B. complete fuel/air mixing
C. minimal fuel penetration
D. proper fuel timing

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