正确答案: A

MF-DSC

题目：船舶在A2海区出现搁浅遇险紧急情况，并需要他方援助时，首选使用___设备向RCC报警。

解析：A

查看原题

举一反三的答案和解析：

[单选题]在GMDSS规则中，下列_____不是通用操作员的能力要求。

具备维修GMDSS设备的能力

[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?

Excessive air in the cylinder

[单选题]成人收缩压的正常范围是()

90-140mmgh

[单选题]下列________是属于船员责任事故。

对机电设备管理使用不当

[单选题]The Restricted parts of a SSP are kept on board by

the SSO

[单选题]船舶检验规定，对锅炉和热油加热器的检验应包括外部检验和内部检验，对锅炉进行外部检时应进行______，包括______。

总体检查/安全保护装置、燃油系统功能及燃油应急切断装置等

[单选题]为避免碰撞所采取的行动，应能导致在安全距离上驶过，该规定适用于________。

以上都对

[单选题]由于吸气阻力过大而引起空压机容积流量降低的原因有( )。

气阀弹簧张力过大

[单选题]通过Inmarsat—C站的报文产生器误发报警信息，应向_____尽快取消误报警。

RCC