EKM-Apr-2019
Q1. Sketch and describe the arrangement of a main engine camshaft chain. Describe the repair procedure following fracture of one chain link during operation of the engine. Give possible reasons for the failure and explain how the chain is set initially at the correct degree of tension.
Q2. With reference to 2-Stroke Slow Speed Engine: A. Sketch and describe Main Engine Exhaust Valve.B. List out a procedure for test of Main Engine Exhaust Valve after overhaul.
Q3. With respect to Lubricating Oils used in Main Engine Sump: A. Briefly describe the causes and effects of bacterial attack on diesel engine lubricating oil. B. Bacterial activity has been detected in the lubricating oil of the main engine fitted in the ship aboard which you are serving as 2ndeng. Write a letter to the owner operator of the ship indicating the action you intend to take and offer suggestion to the avoidance of future incidents.
Q4. With reference to the 4-stroke medium speed engines: A. Define the cause and effect of thermal stressing in cylinder Heads, liners and pistons B. Explain why thermal stressing is aggravated with increased cylinder bore. C. Explain how stress concentration and its effects are relieved by maintenance and operational practices.
Q5. In operation of a 2-stroke marine diesel engine, following conditions are observed at different occasions: (a) A gradual rise in exhaust temperature at one cylinder. (b) A rise in crankcase sump level.Explain the reasons and subsequent actions taken for each of the above.
Q6. Explain why the following problems occur in turbocharger nozzles, shrouds and blades, their effects on turbocharger operation and remedies: – A. Build-up of deposits; B. Hot corrosion; C. Erosion.
Q7. Enumerate the causes of Piston Crown burning and subsequent deterioration in engines using Heavy Fuel Oil. Also mention the possible reasons and steps to be taken to correct the situation of complete burn out of the Piston crown.
Q8. The failure of bridge control and remote control from engine control room has occurred during maneuvring of your vessel in closed waters. (a) What all important data will be required to be monitored and recorded manually? (b)Explain how as a Second Engineer you will organize your staff for effective watch keeping with special attention to maneuvering.
Q9. Sketch and describe the -different types of Crankshafts used in Marine engines. Also describe the process of Induction Hardening performed on crankshafts and give the advantages of this process for the crankshafts.
Q2. With reference to 2-Stroke Slow Speed Engine: A. Sketch and describe Main Engine Exhaust Valve.B. List out a procedure for test of Main Engine Exhaust Valve after overhaul.
Q3. With respect to Lubricating Oils used in Main Engine Sump: A. Briefly describe the causes and effects of bacterial attack on diesel engine lubricating oil. B. Bacterial activity has been detected in the lubricating oil of the main engine fitted in the ship aboard which you are serving as 2ndeng. Write a letter to the owner operator of the ship indicating the action you intend to take and offer suggestion to the avoidance of future incidents.
Q4. With reference to the 4-stroke medium speed engines: A. Define the cause and effect of thermal stressing in cylinder Heads, liners and pistons B. Explain why thermal stressing is aggravated with increased cylinder bore. C. Explain how stress concentration and its effects are relieved by maintenance and operational practices.
Q5. In operation of a 2-stroke marine diesel engine, following conditions are observed at different occasions: (a) A gradual rise in exhaust temperature at one cylinder. (b) A rise in crankcase sump level.Explain the reasons and subsequent actions taken for each of the above.
Q6. Explain why the following problems occur in turbocharger nozzles, shrouds and blades, their effects on turbocharger operation and remedies: – A. Build-up of deposits; B. Hot corrosion; C. Erosion.
Q7. Enumerate the causes of Piston Crown burning and subsequent deterioration in engines using Heavy Fuel Oil. Also mention the possible reasons and steps to be taken to correct the situation of complete burn out of the Piston crown.
Q8. The failure of bridge control and remote control from engine control room has occurred during maneuvring of your vessel in closed waters. (a) What all important data will be required to be monitored and recorded manually? (b)Explain how as a Second Engineer you will organize your staff for effective watch keeping with special attention to maneuvering.
Q9. Sketch and describe the -different types of Crankshafts used in Marine engines. Also describe the process of Induction Hardening performed on crankshafts and give the advantages of this process for the crankshafts.
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