海船船员考试题库2022船舶动力装置题库模拟考试库122

1. [单选题]废气锅炉允许的废气压力损失，对废气流速有重大影响，因为（）。

A. 保持小的废气压力损失，则废气流速必然是低的
B. 废气压力损失与废气流速的平方成正比
C. 废气压力损失与管径4次方成反比
D. A，B，C均对

2. [单选题]船舶轴系中不包括（）。

A. 推力轴及推力轴承
B. 中间轴和中间轴承
C. 内置式推力轴和推力轴承
D. 艉轴和艉轴承

3. [单选题]填料函式艉轴密封装置要求换新填料安装时应（）。Ⅰ.材质不变；Ⅱ.每圈长度恰好对接；Ⅲ.各道填料接口错开；Ⅳ.填料的圈数不变；Ⅴ.必须全部更换。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅱ＋Ⅳ＋Ⅴ
C. Ⅲ＋Ⅳ＋Ⅴ
D. Ⅱ＋Ⅲ＋Ⅳ

4. [单选题]（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.

A. Except for
B. Beside
C. Except
D. In addition to

5. [单选题]A separate piston cooling system is used to limit any contamination （） piston cooling glands（） the piston cooling system only.

A. between；to
B. either；or
C. from；to
D. neither；nor

6. [单选题]Administrations should bear in mind the significance of （） in maintaining safety of life and property at sea and in preventing marine pollution.

A. advanced nautical equipment
B. advanced performance main engines
C. emergency equipment
D. communication and language skill

7. [单选题]If （） are taken at regular intervals, any unequal distribution of load will be easily found out.

A. differential of crank-webs
B. indicator diagrams
C. lube oil reading out
D. misalignment of crank-throw

8. [单选题]The piston moving up and down keeps the crankshaft （）.

A. to revolve
B. revolved
C. revolving
D. to be revolved

9. [单选题]The pumps employed on board ship can be divided into two main categories ie（） pumps and centrifugal pumps.

A. gear
B. nonpositive displacement
C. positive displacement
D. rotary

10. [单选题]The main function of tie rods in the construction of large, low speed diesel engines is to（）.

A. stiffen the bedplate in way of the main bearings to increase the engines longitudinal strength
B. accept most of the tensile loading that results from the firing forces developed during operation
C. mount the engine frame securely to the hull to prevent shaft coupling misalignment
D. connect the crosshead solidly to the piston rod

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