Knowledge material

IMO also recognized by the name IMCO* up to year 1982, is a special agency of the United Nations responsible for regulating shipping. The IMO was accepted following the agreement at a UN conference...

This experiment is carried out on new ships and those that have had large structural alterations  made, to find out the new centre of gravity (kg) and metacentric height (gm)  and further to know...

Ore is heated in furnace with Coke to a temperature of 1800 °C Various reactions at different stages in furnaceC + O2 = CO2 ( at bottom)CO2 + C =  2CO Fe2O3(s) + 3C(s)...

The propeller with perfect pitch/diameter ratio will be the one whose propeller power curve and engine HP curve meets at maximum RPM. Therefore, a propeller curve is a very much significance for chief engineer Significance...

PURPOSE OF STUFFING BOX Provides sealing between Scavenge space and CrankcaseUpper section prevents scavenge air & residues from scavenge space entering crankcase Lower section prevents oil carry over by piston rod from crank...

TESTING OF MARINE ENGINES (1) Manufacturers’ Acceptance Test Here, tests are carried out at the manufacturers’ test bed to check whether the performance values are within the acceptable standards of specification. (2) Sea Trial Test                Here, tests are carried...

The material in solid form which has the capability of withstanding its shape at very high temp of about 1650°C. • Safeguard boiler casing from overheating and distortion and possible...

FUNCTIONING OF BURNER Feature for efficient combustion of fuel are: •        Flame has to be suspended •        Combustion has to be stable •        Fuel must be finely atomized over required range of output •        Air supplied must be intimately mixed with fuel •        Speed of...

Marine engines are manufactured with different components, which are held and tied together to complete the engine structure with the help of tie rods.Tie rod is a long well built rod with bolts at both the...

The main engine is fitted on the ship’s hull with the help of holding down bolts and chocks. The floor where the engine is installed is excessively strengthened by heavy flooring and using additional bars and girders....