Guide to marine engineering meoexams | MEOEXAMS

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STERN TUBE, WORKING PRINCIPLE

Stern Tube, Working principle. Function of stern tube, Type of stern tube bearings:Sea-water lubricated stern tube bearings, Simplex type stern tube, oil-lubricated stern tube bearing, Split stern bearings Stern tube sealing arrangements, Stuffing boxes, Lip seals, Radial face seals, Non-pollution Air Sealing system, Constant Air Flow Type, Weardown measuring, Wear down is measured every drydock and In water survey.

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Marine Boiler [Part-1], Safety Valve

Safety valve are fitted to protect the boiler from over pressure. Type of boiler safety valve, marine auxiliary boiler and exhaust gas boiler setting of safety valve, accumulation pressure test, boiler safety valve set pressure, boiler safety valve working pressure , material used in construction of safety valve, marine boiler safety valve overhaul, boiler safety valve regulations.

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FRESH WATER GENERATOR [PART-1], WORKING PRINCIPLE

Fresh water generator on ships, fresh water generator working principle, vacuum desalination, loss of vacuum in fresh water generator, reverse osmosis fresh water generator, sasakura fresh water generator, fresh water generator alfa laval, pressure testing of fresh water generator, fresh water generator low production reason.

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ME BEARINGS [PART-1], BASICS OF BEARING

Journal bearing basics: bearing function, bearing design criteria, terms used in hydrodynamic journal bearing, diametrical clearance, radial clearance, diametrical clearance, eccentricity, minimum oil film thickness, eccentricity ratio, short and long bearing, bearing characteristic number and bearing modulus.

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REFRIGERATION AND AIR CONDITIONING [PART-1], REVERSE CARNOT REFRIGERATION CYCLE

Refrigeration and air conditioning, reverse carnot refrigeration cycle, practical difficulties with carnot refrigeration cycle, standard vapour compression refrigeration cycle, vapour compression refrigeration cycle, actual vapour compression refrigeration cycle, refrigeration cycle components.

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OIL PURIFIER [PART-1], MARINE PURIFIER WORKING PRINCIPLE

Purification of oil (lub or fuel) is nothing but the separation of impurities like water and sludge from oil. This separation is done on the basis of density difference. Denser substance goes lower by gravity force and lighter substance goes up, and this is the basic fact behind gravity separation. Separating Force is defined by Stoke’s law. In gravitation separation, g is responsible for separation speed, which is fixed.Now if we replace the gravitational acceleration g with centrifugal acceleration (ω² r) then we can increase the separation force by increasing angular velocity and effective radius. Thus if settling tank is replaced by a rotating cylinder the separating force and hence the speed of separation can be increased. This is called centrifuge.

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HOW AIR ENTERS INSIDE THE REFRIGERATION SYSTEM AND HOW TO REMOVE IT??

Air entering inside refrigeration system: Air can enter the refrigeration system through a leak in the low side of the refrigeration system.

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MARPOL 73/78 : LATEST AMENDMENTS ADOPTED BY MEPC 75

LATEST AMENDMENTS ADOPTED BY MEPC 75

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MARINE PUMPS [PART 1], WORKING PRINCIPLE

Marine auxiliary machinery, Marine pumps, Working principle, pumps classification, centrifugal pumps, positive displacement pumps, bernoulli's equation, system curve, Characteristics of a Centrifugal Pump, Characteristics of a Positive-displacement Pump, Pump design and operating point, Effect of Speed and impeller diameter variation, Affinity Law, Pumps in Series and Parallel.

MARINE PUMPS [PART 2], CENTRIFUGAL PUMPS, NET POSITIVE SUCTION HEAD

Marine auxiliary machinery, Marine pumps, Centrifugal pumps, Net positive suction head, Vapor Pressure, Cavitation.

ME FUEL PUMP [PART-1], VIT AND SUPER VIT

Main engine fuel pump VIT (variable injection timing) and super VIT (variable injection timing), The MAN B&W MC engine VIT fuel pump, reason why do we need variable injection timing, conventional variable injection timing, super variable injection timing.

SEWAGE TREATMENT PLANT [PART-1], WORKING PRINCIPLE

Marine auxiliary machinery, Sewage treatment plant, Working principle.

SEWAGE TREATMENT PLANT [PART-2], SEWAGE EFFLUENT TEST

Marine auxiliary machinery, Sewage treatment plant, Sewage effluent test.

SEWAGE TREATMENT PLANT [PART-3], MARPOL ANNEX 4, SEWAGE DISCHARGE CRITERIA

Marine auxiliary machinery, Sewage treatment plant, Marpol annex 4, Sewage discharge criteria.

SEWAGE TREATMENT PLANT [PART-4], BACKFLUSHING OF SEWAGE TREATMENT PLANT

Marine auxiliary machinery, Sewage treatment plant, Backflushing of sewage treatment plant.

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