MEOclassIIexamnotes

Port of refuse is a port or a place that vessels divert to when her master considers it unsafe to continue the voyage due to peril that threatens the common safety Situation in which u call a port of refuge are Dangerous shift of cargo Serious breakdown of machinery Serious fire on board Shortage of bunkers Rough weather Collision Grounding Any other damage affecting seaworthiness of vessel  HOW A SHIP CAN CALL A PORT OF REFUGE? As soon as the decision is taken to discontinue the voyage and make for a place for refuge, inform the owner and the charterer (if any) stating the reasons for deviation. Give relevant details to attending superintendent. He will inform the necessary insurance manager and class. Record the ship’s position. Sound tanks for quantity for bunker on board. From the point until departure from the port of refuge, keep accurate records of events and expenditure. Request the owner to arrange the appointment of an agent at the port of refuge to hand...

Limit switch for all 6 directions-fwd, aft, port, starboard, lowering and hoisting. Mechanical stoppers in case limit switch fails. Overload trip. Electromagnetic brake. Release by availability of electric power.- Fail safe arrangement Rail guard over the pulley Mechanical locking arrangement for rough weather Locking arrangement and hook for safe carriage of load. Clear marking of Safe working load on crane. Breakers at various places. One in engine room and another in ECR. It shall be operate in 50 list and 20 trim.

Check over speed device. Check governor Check fuel pump rack Open crankcase and check the condition inside  Check bottom end bolts. It is better to change them once over speed trip has taken place.  Over speed limits for AE-15% and for ME-20%

Piston ring scuffing is consists of local micro welding, or material adhesion, between a piston ring and a cylinder liner. Various causes of Scuffing are following Lack of Lubrication If the engine doesn't have enough oil, the cylinders will not be properly lubricated. As the ring rubs against the liner of the cylinder, dry spots will cause it to scuff. Symptoms of scuffed piston rings include dirty exhaust and excessive oil consumption. Engine Dry Starts If an engine has sat idle for even a short time, it may have a "dry start" when next used. This occurs because the existing lubricant sheen in the engine has dried up, and these dry parts of the engine run without lubricant in the first few seconds after the engine starts before lubricant is fully circulated. If an engine is dry-started after a new piston ring is installed, scuffing could result. To avoid this, lubricate the ring before installing it or add a secondary engine oiler that squirts oil into the engine...

Big end and big end bearings are of split type Big end is in an oblique direction to reduce the width of big end, reduce the load on bolts and increase the crankpin diameter Top end is having bush type bearing Rectangular or I-shaped is expensive to manufacture but necessary to resist high transverse inertia whip load, gas loads and to fulfill the weight to strength requirement Connecting rod is forged from Magnesium Molybdenum. Edges are serrated  It is subjected to high compressive and low tensile bending stress as well as of axial type  It connects crank pin direct to gudgeon pin

Formation of layer of scales on the furnace wall at the water side can cause overheating and bulging defect on the furnace shell. Bulging in water tube is due to calcium scale deposition on tube walls which cause improper heat transfer. In smoke tube due to carbon deposits bulging is caused. Low water level in boiler. Misalignment of burner can cause overheating which will further cause bulging.

Pressure switch faulty- check pressure switch Pressure switch wrongly set Non return valve after pump leaking, hence water under pressure going back to storage tank- that would be indicated by monitoring of the concerned pump if reverse rotation is taking place. Check on/off controller from pump main panel-contacts opening/closing Check if system is overcharged Check if system in undercharged- Since water is incompressible as soon as water is filled up pressure rises but just on little consumption pressure will drop drastically and pump restarts Check for any air leaks Faulty automatic air volume control Not enough water in tank due to clogged pipelines Air  leaking from relief valve Tank is about to empty