【名词&注释】
正确答案:B。A.附录一 B.附录一和附录二 C.附录二 更多海船船员的考试资料下载及答案解析请访问不凡考网职业技能鉴定考试频道。
[单选题]准备卸货时，MARPOL公约()规定的出海阀，应处于关闭状态，并应用锁锁上。
A. 附录一
B. 附录一和附录二
C. 附录二
查看答案&解析
点击获取本科目所有试题
举一反三：
[单选题]第一组： The Wartsila 50DF operates on the lean-bum principle: the mixture of air and gas in the cylinder has more air than is needed for complete combustion. Lean combustion reduces peak temperatures and therefore NOx emissions. Efficiency is increased and higher output is reached while avoiding knocking. Combustion of the lean air-fuel mixture is initiated by injecting a small amount of LFO (pilot fuel) into the cylinder. The pilot fuel is ignited in a conventional diesel process, providing a high-energy ignition source for the main engine. To obtain the best efficiency and lowest emissions, every cylinder is individually controlled to ensure operation at the correct air-fuel ratio and with the correct amount and timing of pilot fuel rejection. Wartsila has developed a special electronic control system to cope with the demanding task of controlling the combustion in each cylinder, and to ensure optimal performance in terms of efficiency and emissions under all conditions by keeping each cylinder within the operating window. Stable and well-controlled combustion also contributes to less mechanical and thermal load on the engine components. Current stringent emission regulations demand the reduction of NOx emissions. In an internal combustion engine this means controlling peak temperature and residence time, which are the main parameters governing NOx formations. In the Wartsila 50DF engine, the air-fuel ratio is very high (typically 2.2). Since the same specific heat quantity released by combustion is used to heat up a larger mass of air, the maximum temperature and consequently NOx formation are lower. The mixture is uniform. throughout the cylinder since the fuel and air are premixed before introduction into the cylinders, which helps to avoid local NOx formation points within the cylinder. Benefiting from this unique feature, NOx emissions from the Wartsila 50DF are extremely and comply with the most stringent existing legislation.What is the combustion feature of the Wartsila 50DF?
A. Lean air in the cylinder
B. Excessive fuel in the cylinder
C. Excessive air in the cylinder
D. Spark ignition
[单选题]弃船后使求生者丧生的主要原因是______。
A. 缺水
B. 缺食物
C. 身体暴露在寒冷水中
[单选题]The term “moderate speed” was previously interpreted as meaning a speed which would enable a vessel ______ within half the range of visibility.
A. stopping
B. being stopped
C. to stop
D. to be stopped
[单选题]船长应操纵船顶风，使船首多少度：
A. 10°～20°
B. 20°～30°
C. 30°～40°
D. 40°～50°
[单选题]________ late for the meeting
A. Not be
B. Not
C. Don’t
D. Don’t be
[单选题]If a reciprocating air compressor has a knock occurring in frequency with its operating RPM, the cause is probably _____.
A. misalignment or worn main bearings
B. insufficient cylinder lubrication
C. defective or poorly fitted valves
D. All of the above
本文链接：https://www.zhukaozhuanjia.com/download/wr986n.html
