2022海船船员考试题库船舶动力装置题库考前点睛模拟考试255

1. [单选题]可靠性在船舶动力装置质量指标中占有特殊的地位，因为它是（）。Ⅰ.落实其他质量指标的前提；Ⅱ.直接影响其他指标的优劣

A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ，Ⅱ都对
D. Ⅰ，Ⅱ都不对

2. [单选题]对于可靠性和可靠度的表述，不能采用的是（）。

A. 可靠性与可靠度各自有不同的定义
B. 可靠性的定量定义称为可靠度
C. 在可靠性技术中需要定量化，经常不把两者严格区分开来
D. 可靠性与可靠度都有严格的定义，任何时候都不可混同起来

3. [单选题]带有普通键槽的单螺旋桨轴^{(propeller shaft)}或艉轴其检验间隔期为（）。

A. 1年
B. 2年
C. 3年
D. 4年

4. [单选题]在测量螺旋桨螺距时，不需测量的参数是（）。

A. 测量截面的桨叶厚度
B. 螺距规水平杆的转角
C. 顶杆的升程
D. 测量截面的半径和桨的半径

5. [单选题]Emulsion oils and sodium nitrite are both approved additives, but （） cannot be used if any pipes are galvanized or if soldered joints exist.

A. the latter
B. latter
C. former
D. the former

6. [单选题]Modem engines （） exhaust gas driven turbo-chargers to supply pressurized fresh air for scavenging and supercharging.

A. make use of
B. have made the use of
C. by means of
D. make advantage of

7. [单选题]The engine is reversed by axial displacement of the camshafts In order for this to be carried out, the cams are （） with inclined transition faces.

A. lathed
B. shaped
C. shrunk
D. developed

8. [单选题]The piston rings are manufactured with a diameter （） the bore of the cylinder.

A. larger than
B. smaller than
C. equal to
D. none of the above

9. [单选题]Which factor of the following affects not only the fuels combustion but also the engine’s maintenance?（）

A. cetane number
B. flash point
C. viscosity
D. setting point

10. [单选题]Combustion knock occurring in a diesel engine can be caused by （）.

A. excessive fuel penetration
B. prolonged injection lag
C. reduced ignition lag
D. prolonged ignition lag

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