Centrifugal pump Explain the working principle of a Centrifugal pump with a simple diagram. When a certain mass of liquid is made to rotate by an external force, it is thrown away from the central axis of rotation and a centrifugal head is impressed which enables it to rise to a higher level. The centrifugal …
Working principle of a Centrifugal pump. important ques 6 marks Read More »
Duplex filter Draw and Explain a Duplex filter. The DUPLEX strainer is a single housing assembly with an opposing Inlet-Outlet flange. Each housing assembly comprises 2 identical filter chambers both to a centre ball valve diverter chamber. By operation of a single lever, the floor can be diverted from one filter chamber to the second …
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Bunkering operation What are the safety practices followed during Bunkering operation? Proper quantity check of existing bunker and make a bunker plan accordingly. Safe quantity to be 95 % of the volume of a particular the tank. Bunker line valve to be lined up properly as per the bunker plan before starting bunker and other …
What is MARPOL Annexure-VI? MARPOL Annex VI, first adopted in 1997, limits the main air pollutants contained in ships exhaust gas, including sulphur oxides (SOx) and nitrous oxides (NOx), and prohibits deliberate emissions of ozone depleting substances (ODS). MARPOL Annex VI also regulates shipboard incineration, and the emissions of volatile organic compounds (VOC) from tankers. …
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Define- Propeller drop. The propeller shaft in the aft peak tank is provided with inboard and outboard seals. These seals contain nitrile rubber or viton lip seal, which seals against the cast iron propeller shaft. After a few years it creates grooves on them and naturally looses sealing and sea water easily find its way …
What is Pintle Clearance? Pintle is the pin or bolt that hinge the rudder to the gudgeons on the sternpost or rudderpost. The clearance between the pintle and its bush is called pintle clearance. For a newly built ship, the standard clearance is 1.5 mm. For a ship in service, Maximum allowable clearances between pintle and bush is …
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Define- Hunting Gear. Hunting Gear is a feedback mechanism of steering gear which repositions the floating lever of hydraulic pump as the tiller moves to the desire position. Hunting gear floating lever mechanism is required to bring the rudder to the ordered position. This mechanism is required to position the rudder in its ordered position …
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Draw and Explain briefly on E/R Bilge system of a Crude oil tanker. #bilge system We know that the bilges which gets accumulated in the engine room goes into the bilge well which is located in the forward and aft of the ship and also on port as well as on the starboard side. The …
Engineroom Bilge system oil tanker important ques. 10 mark Read More »
What is Gravity Disc? Gravity Disc or Dam Ring have great role in ships purifier. It is the ring fitted at the top of disc stack from where water is passing out. Oil which is for purification may not be of same type it is of different densities or viscosity, so the interface change. To …
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Define-ODMCS. Oil tankers carry different types of oil cargo in their cargo tanks and it often happens that after discharging the oil cargo in some port, the ship sails without any cargo to some other destination. In order to do so, it has to take ballast from the sea to get better draught and stability. …
