Q5. Discuss the significance of cylinder lubrication in two stroke diesel engines considering the impact of Annex VI of Marpol 73/78. Explain:
(a) Two level cylinder lubrication incorporated on few diesel engines.
(b) The effect of over and under lubrication on engines.
Q4. With specific to reference to any make, sketch and describe the Cylinder Lubricating System used in new generation marine diesel engines. How will you effect the optimum cylinder oil feed with varying sulphur content of fuel oil. (16)
Q9. a) Briefly discuss the advantages, disadvantages and working of pulse type cylinder lubrication system. (8)
b) Explain the process of calculating specific cylinder oil consumption of main engine. (8)
Q7. a) Define Specific Cylinder Lubricating Oil Consumption (SCLOC) in a two-stroke marine diesel engine. Derive the formula for SCLOC and explain the procedure for calculating it during normal engine operation. (10)
b) Discuss the factors affecting SCLOC and explain the procedure adopted onboard to optimize cylinder oil consumption. Include methods used for monitoring and adjusting the cylinder lubrication system. (6)
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