海船船员考试题库2022船舶动力装置题库模拟在线题库299

1. [单选题]已知某船排水量为2O000t，主机有效功率为10O00kW，主机重量为350t，动力装置总重量^{(total weight)}为8O0t，则该船主机单位重量为（）kg/kW。

A. 35
B. 80
C. 40
D. 17.5

2. [单选题]劣质渣油中含有（），使用中使烟灰增加且具有粘性，是烟灰发生沉积的重要原因^{(important reasons)}（）。Ⅰ.灰分；Ⅱ.残炭；Ⅲ.硫分

A. 仅Ⅰ对
B. 仅Ⅱ对
C. 仅Ⅲ对
D. Ⅰ+Ⅱ+Ⅲ

3. [单选题]中国船级社要求营运船舶的曲轴臂距差为（）时，应限期修理。

A. ＜0.125S
B. （0.125～0.25）S
C. ＞0.25S
D. ＞0.30S

4. [单选题]主机底脚螺栓松动则可能导致（）。Ⅰ.垫块磨损；Ⅱ.机座局部下沉；Ⅲ.曲轴变形；Ⅳ.主机振动。

A. Ⅱ＋Ⅳ
B. Ⅰ＋Ⅲ
C. Ⅱ＋Ⅲ＋Ⅳ
D. Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ

5. [单选题]赛龙艉轴承材料具有弹性好、（）和不会剥落的特点，但导热性差和不耐高温。

A. 强度高、硬度高
B. 强度高、韧性好
C. 硬度高、耐磨
D. 耐磨、耐蚀

6. [单选题]If the engine does start on air, but combustion does not immediately begin, the cause may not be （）.

A. low compression
B. failure of the fuel pump to discharge fuel
C. incorrect timing of fuel pump
D. turning gear being still o

7. [单选题]The cooler as the liquid becomes, （）.

A. the faster it will evaporate
B. the slower it will condense
C. the slower it will evaporate
D. the faster it will flow

8. [单选题]The cylinder covers and the liners are bolted together by means of studs （） the cylinder frames.

A. screwing into
B. being screw on
C. to screw on
D. screwed into

9. [单选题]The fuel oil pressure and forced draught pressure should be matched to ensure good combustion with a full steady flameIn the sentence the word “match” means （）

A. join with
B. mix
C. be equal to
D. be constant

10. [单选题]Friction, engine wear and oil consumption in a diesel engine are directly related to the （）.

A. acidity of the oil
B. pour point of the oil
C. flash point of the oil
D. viscosity of the oil

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