Pumps: Types of marine pumps and their applications and characteristics. Rotor dynamic pumps: Centrifugal pumps, mixed flow pumps and axial flow pumps. Positive displacement pumps: Reciprocating and rotary pumps (screw and gear pumps). Factors affecting pump performance.  Ejectors. Piping – various types of piping system fitted in ships, valves, types used in Marine Practice. Marine Heat exchangers. Air compressors. Marine distilling plants. waste heat recovery systems. Marine sanitation systems. Marine oily water separators centrifuges, purifiers and clarifiers.