MEP-June-2019
Q1. Describe TWO methods of tracing a superficial crack in a marine machinery component; explain the procedure for arresting the propagation of a crack in a machinery component.
Q2. 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 the cylinder liner. Also, describe the procedure for pressure testing the cooling water side of the Main Engine Cylinder head.
Q3. Briefly describe your action plan on the following exigencies: A. Leaky economizer tube, while at sea; B. Leaky intercooler of main air compressor, while manoeuvring.
Q4. With respect to the operation of the two-stage air compressor. Explain A. The causes of the occasional lifting of the 2nd stage relief valve. B. Breakage of valve plates. C. Puncture of bursting disc of 1st stage intercooler. D. Noticeable reduction in the capacity of the compressors over a period of time.
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. Abnormal vibration has been observed in an HFO purifier while in operation. Explain the areas you plan to investigate for rectifying the faults and put the purifier back to normal operations keeping in view that no reduction in vibration has been noticed even after desludging the purifier couple of times.
Q7. 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.
Q8. Explain in detail how you would isolate one of the sprinkler systems for routine maintenance. Describe all tests and inspections you would make and how you would return the system to service.
Q9. Write a short note on the following –A. Metal – locking; B.TIG and MIG welding; C. Brazing; D. Soldering.
Q2. 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 the cylinder liner. Also, describe the procedure for pressure testing the cooling water side of the Main Engine Cylinder head.
Q3. Briefly describe your action plan on the following exigencies: A. Leaky economizer tube, while at sea; B. Leaky intercooler of main air compressor, while manoeuvring.
Q4. With respect to the operation of the two-stage air compressor. Explain A. The causes of the occasional lifting of the 2nd stage relief valve. B. Breakage of valve plates. C. Puncture of bursting disc of 1st stage intercooler. D. Noticeable reduction in the capacity of the compressors over a period of time.
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. Abnormal vibration has been observed in an HFO purifier while in operation. Explain the areas you plan to investigate for rectifying the faults and put the purifier back to normal operations keeping in view that no reduction in vibration has been noticed even after desludging the purifier couple of times.
Q7. 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.
Q8. Explain in detail how you would isolate one of the sprinkler systems for routine maintenance. Describe all tests and inspections you would make and how you would return the system to service.
Q9. Write a short note on the following –A. Metal – locking; B.TIG and MIG welding; C. Brazing; D. Soldering.
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