Ε Semester engineers

Scavenging is the process of removing exhaust gases from the cylinder after combustion and replenishing the cylinder with fresh air. EFFICIENCY scavenging is necessary for good combustion of fuel inside the engine cylinder. The PASS of scavenge air will also assist cooling of the cylinder, piston and valves. SATISFY scavenging depends on efficient EVACUATE of exhaust gases and minimum LOSE of fresh air through the exhaust passage. Scavenging is important because it affects the overall EFFICIENT of the engine, the power output and the fuel COMSUME . Incomplete scavenging results in poor combustion, lubricating oil CONTAMINATE , piston rings wear, as well as high mean temperature in the cylinder. An engine room log book is a track record of all ship machinery parameters, performance, maintenance, and malfunctions. The recorded values and information are used as a REFER , to compare and record data that can be used for insurance claims in case of an accident. It is of prime importance to note down the relevant information at a place (paper daily log book or electronic log book) for future reference and RETRIEVE when required.