NOX AND SOX EMISSION CONTROL METHODS

crankcase inspection

       List the items to be checked during crankcase inspection of a large Marine Diesel Engine

      Safety Precautions carried Out before Crankcase Inspection:

·         Inform bridge and chief engineer.

·         If in port take immobilization certificate.

·         Get propeller clearance from duty officer.

·         Shut off starting air valve.

·         Put man at work tag

·         Stop lube oil pump.

·         Indicator cocks to be opened.

·         Turning gears to be engaged.

·         Ventilate crankcase door properly.

checks 

• Firstly check oil condition for any smell, discoloration or degradation.
• Check the piston rod surface for scoring marks and roughness.
• Check piston palm bolts and locking device for slackness and fretting.
•      CHECK THE guide shoe and area around it.
•          Check cross head bearing general condition.
•          Evaluate top and bottom end of connecting rod bolt, nut and locking device for       slackness, signs of fretting, etc.
•          Check for slip of web and journal by checking the reference mark.
•          Check crankcase relief door spring tension, wire mesh and & sealing ring.
•          Check the axial movement of bottom end bearing.
•          Check and clear O.M.D sampling pipe.

oil fire in the bilge

       If there be an oil fire in the bilges, what type of fire extinguisher would you use and why?

   answer:

         

1. First check the condition of fire; it is small oil fire in the bilge well.
2. Then raise the fire alarm signal.
3. Remove the combustible material near vicinity.
4. It is a small fire, extinguish by foam portable extinguisher.
5. Release the foam direct to the fire by deflecting it from another surface.
6. Foam is lower specific gravity than oil or water that it will flows across the surface of oil and cover.
7. The fire will stop by blanking with foam.

man-hole cover

    What precautions would you take before opening a man-hole cover of a fuel tank?

    answer:

    

1. Gas free certificate
2. Tank entry permit
3. Risk assessment.
4. Test tank atmosphere for toxic gases and oxygen.
5. Breathing apparatus, resuscitation equipment to be kept ready at entrance.
6. Life line to be put on.
7. A spark proof hand torch light to be brought in
8. Competent person to be kept on watch
9. Smoking and naked light not allowed in vicinity.