职业技能鉴定2022海船船员备考模拟试题260

1. [单选题]Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because________.

A. The direction of pressure on the journal in four-stroke engine is continuously
B. positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine
C. four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines
D. Low-stroke engines usually consume less lube oil than four-stroke engines

2. [单选题]当滤器的绝对过滤精度为10微米时，表明该滤器后________。

A. 不含10微米以上污染颗粒
B. 10微米以上污染颗粒浓度不到滤器前的1/20
C. 10微米以上污染颗粒浓度不到滤器前的1/75
D. 10微米以上污染颗粒浓度不到滤器前的1/100

3. [单选题]吊架降落救生筏载足全部乘员及其属具后，至少从（）米的高度处投落水中，不得有影响其性能的损坏。

A. 2
B. 3
C. 4

4. [单选题]零件疲劳断裂后，其断口分为( )区。Ⅰ.疲劳源;Ⅱ.贝纹;Ⅲ，裂纹扩展;Ⅳ.断裂;Ⅴ.材料。

A. Ⅰ+Ⅱ+Ⅳ
B. Ⅰ+Ⅲ+Ⅳ
C. Ⅰ+Ⅱ+Ⅲ+Ⅳ
D. Ⅰ+Ⅱ+Ⅳ十Ⅴ

5. [单选题]One of the reasons that causes oil flowed from sludge outlet of a self-cleaning purifier is

A. seal water supply be cut off
B. make-up water supply be cut off
C. oil outlet valve closed or not open sufficiently
D. the flow rate of oil is too much

6. [单选题]第三组：Ship recycling contributes to sustainable development and is the environmentally friendly way of disposing of ships with virtually every part of the hull, machinery, equipment, fittings and even furniture being re-used. However, while the principle of ship recycling is a sound one, the reported status of working practices and environmental standards in recycling facilities often leaves much to be desired. Such growing concerns about environmental safety, health and welfare matters in the ship recycling industry have resulted in a growing belief that an international instrument to regulate the ship recycling process is urgently needed.

A. Having become aware of the need to reduce the environmental, occupational health and safety risks related to ship recycling, as well as the need to secure the smooth withdrawal of ships that have reached the end of their operating lives, the International Maritime Organization (IMO) has taken action to develop a realistic and effective solution to the problem of ship recycling, which will take into account the particular characteristics of international maritime transport and the economic realities.
B. Which statement of the following is true?
C. Ship recycling is sustainable
D. Ship recycling is very friendly to our environment
E. Ship recycling is the best way to dispose the machinery, equipment, fittings and even furniture on board
F. Ship recycling brings many problems concerning environmental safety, health and______occupational safety

7. [单选题]The bridge should inform the engine room______before passing through congested or shallow waterway.

A. 24 hours
B. 2 hours
C. 1 hour
D. 15 minutes

8. [单选题]油轮上向油舱或机舱内施放的泡沫为______。

A. 高倍泡沫
B. 低倍泡沫
C. 中倍泡沫
D. 发泡倍数20倍以上的泡沫

9. [单选题]右舷受风的帆船A看到位于其上风位置的另一帆船B驶近致有构成碰撞危险，则________。

A. A船给B船让路
B. B船给A船让路
C. A船应保速保向
D. B和C正确

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