MEP-January-2019
Q1. 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 inter-cooler. D. Noticeable reduction in the capacity of the compressors over a period of time.
Q2. 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.
Q3. 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.
Q4: Briefly describe your action plan on the 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. What is the Rocking test of Deck Crane? Explain the procedure of the rocking test. Tabulate and indicate a fault-finding procedure. What is the action taken if the deviation is out of the limit?
Q7. Describe the procedure for overhauling a boiler safety valve and explain using sketches where necessary those parts, which require close attention. Also, describe the procedure setting of boiler safety valves.
Q8. A. State the circumstances owing to which it may be necessary to renew a cylinder liner; B. Explain how the cylinder liner is removed and fitted back; C. State the important checks to be made on the engine before after fitting.
Q9. Describe the procedure to remove a seized fuel injector body from the cylinder head when it could not be removed by conventional means. Also, list out preventive measures which could be implemented in the vessel so that such a seizure can be prevented in the future.
Q2. 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.
Q3. 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.
Q4: Briefly describe your action plan on the 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. What is the Rocking test of Deck Crane? Explain the procedure of the rocking test. Tabulate and indicate a fault-finding procedure. What is the action taken if the deviation is out of the limit?
Q7. Describe the procedure for overhauling a boiler safety valve and explain using sketches where necessary those parts, which require close attention. Also, describe the procedure setting of boiler safety valves.
Q8. A. State the circumstances owing to which it may be necessary to renew a cylinder liner; B. Explain how the cylinder liner is removed and fitted back; C. State the important checks to be made on the engine before after fitting.
Q9. Describe the procedure to remove a seized fuel injector body from the cylinder head when it could not be removed by conventional means. Also, list out preventive measures which could be implemented in the vessel so that such a seizure can be prevented in the future.
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