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Q3. (a) Sketch a typical power indicator card for a slow speed marine diesel engine.

(b) Explain how the card may be used to assess the power developed in the Cylinder.

Q7. A. Difficulty has been experienced in maintaining engine speed at the set value. State the possible causes and how each of these causes may be detected. (8)

B. Describe the action to be taken in order to ensure safe operation of the main engine plant in the event of complete failure of the remote control and sensing equipment. (8)

Q5. With reference to crankcase diaphragm glands: Explain why effectiveness deteriorates in service.

A. Describe the procedure for renewal of parts so that efficiency is restored. (6)

B. Describe how effectiveness is restored if spares are unavailable. (5)

C. Explain the functions of the upper and lower sections. (5)

Q8. a) State the reasons for persistent slackening of holding down bolts of a main engine. (6)

b) i) State the advantages of using non-metallic choking for main engines. (5)

ii) State precautions to be observed when fitting non-metallic chocks in order to ensure accurate chocking. (5)

Q1. With reference to main engine tie rod explain.

A. Function (3)

B. Effect on main engine in case slack (3)

C. Identifying slackness (3)

D. Material (3)

E. Tightening procedure. (4)

Q7. (a) Sketch a section through the bedplate and A frame of a large slow speed engine, identifying parts, method of construction and materials (10)

(b) Explain the function of the tie bolts and how after an alignment problem, these would be tightened (6)

Q3. Recent experience has shown persistence damage occurring on seating faces of main engine exhaust valve, which is not confined to any particular unit.

(a) State with reason the possible causes. (6)

(b) State the short-term action to be taken in order to minimize engine operational problem. (5)

(c) State with reason how future incident of this nature could be minimized. (5)

Q8. (a) (i) Describe with the aid of a sketch, a main engine exhaust valve which is hydraulically operated (8)

(ii) Explain the operation of this valve (4)

(b) State the materials used for the seat and valve described in (a) (4)

Q9. (a) If soon after joining as a second engineer on a motor vessel, you observed that number of holding down bolts are slack and fretting has occurred around slack holding down bolts. Describe what actions do you take. (8)

(b) Explain the correct procedure for checking the holding down bolts tightness? (8)

Q6. Write short notes on:

(a) Main air starting valves (4)

(b) Exhaust valve rotator (4)

(c) Scavenge relief valve (4)

(d) Function of Labyrinth Seals in turbocharger (4)

Q4. In a situation where the main engine control system suddenly fails, and it is not possible to rectify this immediately

A. Explain the action that a 2nd engineer should take. (8)

B. State the instruction that the 2nd engineer should issue in order to ensure the continued safe and effective operation of the engine. (8)

Q5. A large marine diesel main propulsion engine, speed fluctuates all the time during the voyage. Make written statements to the chief engineer explaining the observation of various engine parameters, during the voyage which could be indication of some fault, causing engine speed fluctuation. (16)