DUTIES OF 4 TH ENGINEER

 BUNKERING 

PURIFIER OVERHAUL  AND MAINTENANCE

COMPRESSOR  MAINTENANCE

TAKING SOUNDING OF STORAGE TANKS

ROUTINE ROUNDS OF ECR 

CHECKING OF LSA & FFA

MAINTENANCE OF LIFEBOAT

IF WE ARE IN TANKER ,MAKE THE PLANT READY AND RUN THE C.O.P.T

INVENTORY  AND  PMS MAINTENANCE

ASSISTANT WITH CHIEF ENGINEER AND 2^ND ENGINEER

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Ideal properties of a Marine Refrigerant

Low Boiling Point (for easy system start).

High Enthalpy of vaporization ( to gain more heat from the evaporator).

Low Condensing Pressure (easy condensing).

Less specific volume in vapor state (to accommodate less space in line).

High Critical Temp (temperature above which vapor cannot be condensed).

Non Corrosive (system loving)

Non Solvent (to oil and impurities)

Non Miscible (to lub oil (possible to a certain extent)).

Non Flammable (for obvious reasons).

Non Explosive (Obviously).

Non Toxic

Easy Leak Detection (by odor or color).

Cheap and Easily available.

Environment Friendly.

TYPE OF MOTOR AND ITS USES MEO CLASS-4

 1. Turning Gear - Double cage induction motor,

2. Life boat starting motor - Cranking motor solenoid control

3. Emergency generator- cranking motor solenoid control or Hydraulic accumulator starter motor

4. Purifier - 3phase induction motor 

5. Windlass & winches - electric- two speed control, pole changing motor & Hydraulic windlass - Hydraulic windlass 

6. Air compressor - 3phase induction motor 

7. Bilge pump - 3 phase induction motor 

8. Fire pump - 3phase induction motor 

9. Governor - DC motor ( isochronous governor)

10. Bow thruster - 3 phase induction motor ( with soft starter)

PRECAUTIONS TO BE OBSERVED WHILE CLEANING CHEMICALS

PRECAUTIONS:

1. Some chemicals produce toxic gases, hence carryout ventilation while using such chemicals,
2. Use protective clothing while cleaning chemicals and barrier creams which may help to protect the skin may be applied,
3. A chemical from an un_labelled container should never be used unless uts identify has been positively established,
4. Chemical should always be handled with utmost care,eyes and skin should be protected from accidental exposure or contact,
5. Manufacturer or supplier's advice on the correct use of chemicals  should always be followed,
6. Chemical should not be mixed unless is it known that the dangerous reaction will not be caused.
7. Carbon tetra chloride should not be used for cleaning electrical equipments, because of the High toxicity of its vapours,
8. A record (Product data sheet) should (when obtainable) be kept on board, available to all users, containing sufficient information to determine the degree of the danger posed by the substance,
9. Exposure to certain substance such as mineral oils, natural solvents, and chemicals including domestic cleaning agents and detergents may cause dermatitis.
10. Suitable gloves should be worn when using such substance,
11. Medical first aid guid should be consulted for accidents involving chemicals,

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SOME RULES &SAFETY PRECAUTIONS RELATING TO PUMPING OUT BILGE

 RULES & SAFETY PRECAUTIONS 

1. Vessel shall have atleast four independent power pumps connected to mains, ballast, sanitary
2. One such pump should be remote operated 
3. pump should be of self priming type,
4. Each pimp should have a direct suction,
5. Main circulation pump should have a direct suction with non return valve,
6. Bilge pipes should not be led through oil tanks or double bottom tanks.
7. Bilge valves should be non return valve,
8. Emergency bilge system should be separated from main system,
9. Bilge pipes should be provided with mud boxes and strum boxes,
10. Sounding pipes where provided are to be as straight as possible,
11. Bilges should never be pumped out directly into sea,
12. Bilges should be pumped via oily bilge separator,
13. Never pump out bilges without the permission of chief engineer,

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STARTING AND RUNNING CHECKS AND STOPPING OF AIR COMPRESSOR

 STARTING PROCEDURE

• check the air bottle pressure and drain  the air bottle for any condensate moisture.

1. Open air  bottle filling  valve.
2. Open compressor air discharge valve,
3. Check compressor sump oil level,
4. Open compressor air cooler cooling water inlet and outlet valves,
5. Purge out cooling water area -jacket etc,
6. Open drain valve of each stage,
7. Crank the compressor by hand a couple of times.
8. Make sure compressor body is free from any other foreign materials,
9.  Start the compressor,

RUNNING CHECKS:

1. close the air cooler air side stages drain valves, starting from 1st stage.
2. Check compressor lub oil pressure and cooling water pressure,
3. Drain each stage cooler and air bottle at regular intervals of 5 mints.
4. Check crankcase and all stages coolers for over heating,
5. Check for any abnormal sounds,
6. Check the air pressure and air temperature of air receiver and every stage of compressor.

STOPPING PROCEDURE:

1. when air bottle attained the required pressure
2. Open the air cooler drain valves (starting from 3rd stage to 1st stage)
3. Stop the compressor,
4. Close compressor outlet valve,
5. Close air bottle inlet valve,.
6. Drain air bottle to remove any condensate,
7. Shut the cooling water inlet and outlet valves, after air compressor has cooled down,
8. Check all valves are in their correct position.