95MEKM-4Sr. No. 4

EXAMINATION OF MARINE ENGINEER OFFICERFunction: Marine Engineering at Operational Level

MARINE ENGINEERING KNOWLEDGE (MOTOR)

M.E.O. Class IV (Time allowed - 3hours)

India (2002) Afternoon Paper Total Marks 100

NB : (1)All Questions are Compulsory (2)All Questions carry equal marks (3)Neatness in handwriting and clarity in expression carries weightage

1. A main engine liner which was recently overhauled and its sealing rings renewed, started leaking during the voyage. Write a letter to the owners suggesting what you propose to do in the next port, to ensure that such a problem does not reoccur again.

2. Sketch the main engine lubricating oil system of a large 2 stroke marine diesel engine and state the L.O. safety devices on the system.

3. State with reason the essential requirement for unattended machinery spaces(UMS).

4. (a) Describe briefly the operation of an electrical or hydraulic main engine governor.(b) For the type described indicate how failure can occur and the action to be taken if

immediate correction cannot be achieved and the engine must be operated.

5. Generally speaking the foundation of a reciprocating engine must perform three function(a) Support the weight of the engine.(b) Maintain the engine in proper alignment with the driven mechanism.(c) Absorb vibrations produced by unbalanced forces due to reciprocating and

revolving manners.How is the foundation fabricated to perform all these functions. Suggest any other function, you think it, performs other than the ones stated above.

6. Explain the concept of pH and the significance of its value in boiler water chemical conditioning.Suggest, with reasons, what could cause the pH value in boiler water to reduce:

(i) Rapidly over a short period of time(ii) Gradually over a long period of time.

7. State what can be done to continue operation with a turbo-charger having water leakage into the exhaust gas space.

8. Sketch a simple cross-section through a single stage jacket cooling water centrifugal pump with a fully shrouded single entry impeller; name the components of the pump and indicate the direction of fluid flow.

9. The diesel driven life boat engine simply refuses to start after running perfectly for a period of half an hour just before you prepare it to restart again. State just 4 checks you would make to confirm the cause of this problem.

10. Excessive leakage and premature failure of valve packing is a result of ____________.

(a) opening a valve too quickly(b) jamming a valve in the closed position(c) low pressure fluid flow through the pipeline(d) a scored valve stemBriefly Justify Your Answer

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95MEKM-4Sr. No. 4

EXAMINATION OF MARINE ENGINEER OFFICERFunction: Marine Engineering at Operational Level

MARINE ENGINEERING KNOWLEDGE (MOTOR)

M.E.O. Class IV (Time allowed - 3hours)

India (2002) Afternoon Paper Total Marks 100

NB : (1)All Questions are Compulsory (2)All Questions carry equal marks (3)Neatness in handwriting and clarity in expression carries weightage

Answers

Answer for Question No. 10 Correct Answer : D