强化气缸套内圆表面的方法主要有（）等工艺，使表面耐磨性、抗咬

【名词&注释】

可靠性(reliability)、气缸套(cylinder liner)、船舶动力装置(marine power plant)、表面耐磨性(surface wearability)

[单选题]强化气缸套内圆表面的方法主要有（）等工艺，使表面耐磨性^{(surface wearability)}、抗咬合性提高来防止拉缸事故。Ⅰ.松孔镀铬；Ⅱ.镀铁；Ⅲ.离子氮化；Ⅳ.硬质镀铬；Ⅴ.喷钼。

A. Ⅰ＋Ⅱ＋Ⅴ
B. Ⅰ＋Ⅲ
C. Ⅱ＋Ⅳ＋Ⅴ
D. Ⅰ＋Ⅲ＋Ⅴ

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学习资料：

[单选题]关于产品的维佟性，指出哪个是错误的表述（）。

A. 维修度是维修性的定量定义，用M（t）表示
B. PM（T<t）为产品恢复到规定功能时间T不超过规定时间t的概率
C. 产品的维修度是表示产品进行维修的难易程度
D. 产品的维修度高，则降低了船舶动力装置的可靠性

[单选题]After the ship is out of the harbour and in “Full Speed”, well change （）.

A. to fuel oil instead of diesel oil
B. for fuel oil instead of diesel oil
C. to diesel oil into fuel oil
D. for diesel oil into fuel oil

[单选题]Which of the following conditions can cause above normal air temperature to develop in the intake manifold of a four-stroke/cycle turbo-charged diesel engine?（）

A. Clogged air intake falters
B. Piston blow-by
C. A defective after-cooler
D. Faulty exhaust valve

[单选题]In a diesel engine cooling water system, a pH of 60 indicates a/an （）.

A. slightly acidic condition
B. slightly alkaline condition
C. overtreatment of water
D. neutral condition of water

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