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DUCTILITY A metal is ductile when it may be drawn out in tension without rupture. Wire drawing depends upon ductility for its successful operation. A ductile metal must be both strong and plastic With many materials ductility increase rapidly with heat. Is the property of a material which enables it to be drawn easily into …
Image Credit: Taybro Alloys Stainless Steel Carbon is the most important component in commercial steel alloy. Increasing carbon content increases hardness and strength and improves hardenability. But carbon also increases brittleness and reduces weldability because of its tendency to form martensite. While there are steels that have up to 2% carbon content, they are …
1.0 Fuel and Lubricants 1. Draw a line diagram of a simple distillation process indicating the points at which kerosene, gas oil, residual fuel, heavy gas oil and lubricating oil are fractioned off. (10) 2. (a) What are the reasons for the deterioration in the quality of fuel supplied for use in marine diesel engines.(2) …
Under regulation 4 of MARPOL Annex VI the exhaust gas cleaning systems (scrubber) are excepted based on the criteria described on the guideline (resolution MEPC 259(68)). Wash water parameters limit was set for PH, PAH, Turbidity and Suspended particle maters and Nitrate. To fulfil the specific requirements of the regulations three types of scrubber are …
Author: Md Taifur Rahman, MEO-2, MPA, 46/E, BMA. Dual fuel engines were introduced in the marine industry through the gas carriers. But now a day’s large size containers are also started to uses duel fuel engines. These engines use both natural gas and bunker fuel to meet the IMO and MARPOL regulations as its having …
Dear Juniors, Assalamualaikum and good day. DG shipping Bangladesh has posted the question bank for the CoC exams of marine engineers in the DOS portal. You can get their published question bank for all subjects by clicking the below link: https://dos.portal.gov.bd/site/page/cacc8319-9bfa-4e30-8839-9bc493b2aaaf
1.0 FUEL INJECTION SYSTEM 1.Draw onboard Fuel Oil system using mixing column of a large Two-Stroke Engine indicating all parts clearly. (10) 2.For perfect combustion in the engine, describe the importance of ( 2.5 X 4) (a) Viscosity, (b) Atomization (c) Penetration and (d) Turbulence. 3.Define Ignition Delay? Describe the effect of the Ignition …
BWMS & BWTS To prevent the introduction of harmful aquatic species into new environments by shipping which have been thought to be a major threat to marine ecology and have been devastating in many areas of the IMO adopted the Ballast Water Management Convention in 2004 at a diplomatic conference in London and eventually the …
Ship’s Nitrogen Gas Generator Nitrogen gas generators are used to produce clean and dry nitrogen of higher purity for inerting, purging and cargo padding. Mainly there are two types of nitrogen generators are widely used on board: One type uses hollow fiber membrane technology and Other one is based on the Pressure Swing Absorption (PSA) …
