MEP-December-2019
Q1. Describe the procedure for replacing a Main Engine cylinder liner and explain using sketches where necessary, those parts, which require close attention during lifting of cylinder liner. Also describe the procedure for pressure testing the cooling water side of the Main Engine Cylinder head.
Q2. Describe TWO methods of tracing a superficial crack in a marine machinery component. Explain the procedure for arresting propagation of a crack in a machinery component.
Q3. With respect to the operation of two stage air compressor. Explain: A. The causes of occasional lifting of 2nd stage relief valve. B. Breakage of valve plates. C. Puncture of bursting disc of 1st stage inter-cooler. D. Noticeable reduction in capacity of the compressors over a period of time.
Q4. Briefly describe your action plan on following exigencies: A. Leaky economizer tube, while at sea; B. Leaky inter-cooler of main air compressor, while manoeuvring.
Q5. With the aid of a simple sketch, explain the “trouble spots” in a basic air-conditioning unit with reference to your sketch, explain the following: – i. How the problem of increase in humidity on cooled air is overcome? ii. How discomfort caused by the excessive drying effect of heated air is overcome?
Q6. You have opened up the main sea-water circulating pump (centrifugal type) onboard your vessel for examination and overhaul, describe the checks you would make, and state your conclusion regarding any faults found.
Q7. With reference to health hazards from asbestos: a. state where asbestos may be found on board ship; b. state the health risks from asbestos; c. outline the precautions necessary to minimize exposure to asbestos during an emergency repair.
Q8. Severe engine vibration has recently become evident when the main engine for which you are responsible operates within a certain speed range – A. State, with reasons, the possible causes of such vibration; B. State the consequences of operating the engine under such vibratory conditions; C. Describe the procedure you, as Second Engineer, would implement in order to investigate and rectify the problem.
Q9. Write a short note on the following – (A). Metal–locking; (B). TIG and MIG welding; (C). Brazing; (D). Soldering.
Q2. Describe TWO methods of tracing a superficial crack in a marine machinery component. Explain the procedure for arresting propagation of a crack in a machinery component.
Q3. With respect to the operation of two stage air compressor. Explain: A. The causes of occasional lifting of 2nd stage relief valve. B. Breakage of valve plates. C. Puncture of bursting disc of 1st stage inter-cooler. D. Noticeable reduction in capacity of the compressors over a period of time.
Q4. Briefly describe your action plan on following exigencies: A. Leaky economizer tube, while at sea; B. Leaky inter-cooler of main air compressor, while manoeuvring.
Q5. With the aid of a simple sketch, explain the “trouble spots” in a basic air-conditioning unit with reference to your sketch, explain the following: – i. How the problem of increase in humidity on cooled air is overcome? ii. How discomfort caused by the excessive drying effect of heated air is overcome?
Q6. You have opened up the main sea-water circulating pump (centrifugal type) onboard your vessel for examination and overhaul, describe the checks you would make, and state your conclusion regarding any faults found.
Q7. With reference to health hazards from asbestos: a. state where asbestos may be found on board ship; b. state the health risks from asbestos; c. outline the precautions necessary to minimize exposure to asbestos during an emergency repair.
Q8. Severe engine vibration has recently become evident when the main engine for which you are responsible operates within a certain speed range – A. State, with reasons, the possible causes of such vibration; B. State the consequences of operating the engine under such vibratory conditions; C. Describe the procedure you, as Second Engineer, would implement in order to investigate and rectify the problem.
Q9. Write a short note on the following – (A). Metal–locking; (B). TIG and MIG welding; (C). Brazing; (D). Soldering.
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