Marine Engineer Officer Class-3 Exam :

Sl No	Subjects	Marks
01	Applied Mechanics	50
02	Applied Heat	50
03	Electro-technology	50
04	Naval  Architecture	50
05	Mathematics	50
06	Engineering Knowledge  (General )	50
07	Engineering Knowledge  (Motor )	50
08	Oral	70

Ships in general

A CARGO SHIP

A CARGO SHIP

PARTS OF A MERCHANT SHIP ( IN GENERAL )

Starting from the top most point on a ship :

• The MONKEY ISLAND ( a place where all the antenna and transmission and reception units antennas are situated) it is the place ( open deck ) just above the ship's navigational bridge.

• The Navigation Bridge ( it is a place / deck from where a ship MASTER ( CAPTAIN ) and ship's officers control the movements of a ship.

• The CREW ACCOMMODATION deck ( several decks / plateforms and cabins are designed for the ship's officers , engineers and crews residence )

• FUNNEL DECK ( a place where all the exhaust pipes from main engine and generators are leading out )

• BOAT DECK ( a deck on which life boats are placed in ready positions , on the davits , usually on both PORT and STARBOARD sides of the ship ) i.e. left and right hand side

• Then there are MESS ROOMS / SMOKE ROOMS / REST ROOMS / SWIMMING POOL / GALLEY ( KITCHEN ) / GYM ROOM etc.

• WEATHER DECK / UPPER DECK ( It is the upper most continuous deck on a ship , it is open to weather and sea on this deck mooring equipments and machineries are mounted in the forward and after parts of the ship.

• STEM ( the foremost plate line of the ship )

• STERN ( the after part of the ship )

• FORECASTLE DECk ( forward part deck where all the mooring appliances are kept)

• POOP DECK ( after part where all the mooring appliances are kept )

• FORECASTLE STORE ( a store room in the front part of the ship used for general purpose)

• SHIP'S CARGO GEAR ( It may be a RADIAL HYDRULIC CRANE , GANTRY CRANE, or A DERICK

These are some parts of ship visible to the outsiders when the ship is moving through the water. But there a many more in the list which are visible to the outsiders when the ship is in the DRY DOCK.
However we will see some more parts of a cargo ship in the following list

A GENERAL CARGO SHIP

IT IS A GENERAL CARGO SHIP WITH GANTRY CRANE

PARTS OF A CARGO SHIP ( IN GENERAL )

• CARGO HOLD ( a storage place where the cargo is loaded and stored safely )

• HATCH COVER ( It is a cover for the cargo holds for the protection of the cargo from the various natural and atmospheric conditions )

• ENGINE ROOM (It is the designated space for the ship's main engine and its various components )

• EMERGENCY FIRE PUMP ( It is a designated pump for supply of sea water in case of any emergency .)

• EMERGENCY GENERATOR ( It is a designated machinery / generator for the electric suppy in case of any emergency i.e. black out. )

• BATTERY ROOM ( It is the location of the ship's spare batteries which are kept ready and charged to provide back up in case of any emergency such as black out. etc. )

• BALLAST TANK (These are the tanks made in the ship's hull or say in the ship's bottom part to carry the ballast water i.e. sea water to enable the ship to gain some stability and draft )

• LUB OIL TANK ( These are the tanks constructed in the ship's hull to store the lub oil required for the main engine and generator engines )

• BUNKER TANK (These are the tanks constructed in the ship's hull to store the ship's fuel oil i.e. diesel and heavy oil to run the ship's machinery.)

• AIR BOTTLE ( These are the air bottles designed to store preserve the compressed air for the main engine starting purposes and for deck work as well )

• UNDER DECK PASSAGE ( These are the tunnels or under deck passages to enable the ship's personnel to move from the forward to after part of the ship. )

• DUCT KEEL ( It is the small diameter tunnel or low height passage way in the ships bottom part near the ship's fore and aft center line - through which  most of the electric cables and pipelines run from forward to after par of the ship. )

• BOW THRUSTER ( These are the small size thruster fans fitted in the forward bottom part of the ship - to create the high power thrust in the bow part of the ship thus enabling the ship to swing the head in the desired direction. )

• PROPELLER (This is a huge size fan or say assembly of big size blades which , when rotated under power , generates very high thrust  and that propels  the ship ahead. It is fitted in the after bottom par of the ship. In short, the "propeller" enables the ship to move under power )

• RUDDER ( It is the big size plating  enabled  to move radially - fitted just behind the propeller,  to alter the direction of the thrust , thus changing the heading of the ship. )

A PASSENGER SHIP

About Marine Diesel Engine

The core of marine diesel engines are the combustion chambers. In each chamber, a piston goes goes up and down based on the combustion of diesel fuel. A connecting rod transfers the motion of the piston to the crankshaft. The crankshaft converts the up and down motion to useful rotation. At its most basic level, the idea is simple, but to make an engine work in the real world, systems must inject fuel, lubricate the pistons, and dissipate excess heat. These three systems are known as the fuel, lubrication, and cooling systems.

Fuel
A tank stores diesel fuel. A fuel injection pump sprays diesel into each chamber. This pump is the most expensive part on a diesel engine. A governor controls the quantity of fuel. The piston compresses the diesel which naturally ignites without stimulus from a spark plug like in a gasoline engine. Valves controlled by the camshaft open and close to let out the exhaust fumes and in fresh air. Ninety percent of engine problems are due to contaminated fuel. A fuel filter is essential to keep the engine running well.

Oil Cooler (Marine Diesel Engines)

Lubrication
In the bottom of the engine is an oil sump. An oil pump circulates the oil through openings in the engine block called the oil galleries. The oil sprays out throughout the block onto the pistons and shafts to lubricate their motion. Then, the oil seeps down again into the sump in the bottom of the block. An oil filter is key to keep the oil circulating.

Engine Parts (Courtesy Marine Diesel Engines)

Cooling
There are two types of cooling systems: raw water and fresh water. In a raw water system, saltwater rushes throughout the jackets of the engine absorbing heat, returns overboard to the body of water. Problems with directly using raw water include silt, corrosion, and scale. In a fresh water system, coolant circulates throughout the jackets of the engine. Then the coolant flows through small diameter pipes in a heat exchanger. The head exchanger is full of saltwater which flows in and out from the immersed body of water. The coolant takes the heat from the engine and dissipates that heat into the saltwater in the heat exchanger. That saltwater bath water circulates overboard. A thermostat controls the preferred temperature of the engine. Raw water engines run at 140-160 degrees Fahrenheit. Fresh water engines should run at 185 degree Fahrenheit.
Conclusion
The engine is based on pistons going up and down in combustion chambers. Fuel, lubrication, and cooling systems manage this action. The italicized terms above are important parts of a marine diesel engine. Beyond the engine are the transmission, shaft, propeller, and steering which together eventually work to propel a boat.