A fire and bilge pump has suctions from sea, bilge main and engine room bilge, with discharges to fire main, oily water separator and overboard. A ballast pump has suctions from sea, ballast main, engine room , bilge direct and bilge main with discharges to overboard, the ballast main, the oily water separator and possibly, the main salt water circulating system

Open systems using gravity tanks, etc., are rarely met nowadays and Figure 1.8 shows a characteristic arrangement of pressure tanks, calorifiers and pumps for a large ship. The fresh water pumps are self-priming, drawing from storage tanks and discharging through filters to a rising main, branched to give a cold supply and a hot supply in closed circuit through a calorifier. A tank kept under pressure by an external supply of compressed air rests on the system and provides the head necessary

Learning Objectives The learning objectives of this section are to make all engineers, engine cadets and other crew members who are involved in the handling of fuels onboard, familiar with: – How to handle the fuel. – Take the necessary simple precautions by following test procedures

The main objective of this section is to make you acquainted with the relevance of fuel parameters on: Abnormal ignition and combustion. Wear, piston ring collapse and breakage. Gas leakage. Ignition, combustion and exhaust gas emission. Engine damages and operational problems. Prevention of engine damages with off spec. fuels and to recognize their impact on the operation of marine diesel engines

一、 双向变量泵作主泵 二、一般都采用闭式液压系统

了解泵的正常工作条件，不仅对泵的正确安装和使用管理有重要的意义，同时也有助于分析各类泵不能正常吸排的原因

根据我国国标“GBll034-89”规定的船用电动往复泵的型号表示形式，可举例如下：

一、 由缸套，主, 动螺杆组成。 二、 主、从动螺杆转向相反。 三、 各啮合螺杆之间以及螺杆与缸套间的间隙很小，在泵内形成多个彼此分隔的容腔

一、 用作真空泵或离心泵的引水泵

一、 是将原动机机械能传递给被排送液体的工作部件，对泵的工作性能有决定性影响。 二、 闭式叶轮 - 有前、后盖板的叶轮称为