DieselShip's Online Content Library

Q2. a) Define creep and specify the conditions under which it occurs?

b) Discuss three metallurgical processing techniques that are employed to enhance the creep resistance of metal alloys

Q2. With respect to bunkers handling on ships using LNG as alternative fuel, discuss the following:

(a) How are the bunkers taken onboard ships tanks?

(b) Discuss the check lists, arrival checks and factors to be considered for bunkering?

(c) Risk analysis methodology to ensure safe bunkering operations?

(d) Explain how the bunker is prepared and used onboard the engines?

Q3. A. Sketch a transmission shaft coupling which enables the propeller shaft to be withdrawn outward.

(a) describe the coupling and the method fitting and dismantling;

(b) state how the grip of the coupling can be checked when fitted;

(c) State what safety precaution should be taken when dismantling the coupling.

Q4. Exhaust gas cleaning system is one of the system used on board ship to reduce SOX emissions-

(a) Briefly discuss various types of Exhaust gas cleaning system used on board ship.

(b) What all data to be monitored and recorded when EGCS is in use to ensure that system meets all IMO regulations.

(c) What action you will take as second engineer if the system stopped working.

Q9: A new vessel exhibits severe aft end vibration

A. As a Second Engineer Officer, outline a procedure to investigate and identify the source of vibration

B. Suggest possible remedies to obviate / reduce aft end vibration.

Q6. Briefly describe the tests made on a piece of metal to determine its suitability for use in engineering. Explain clearly what is meant by any four of the following metallurgical terms:

(a) Work hardening,

(b) Cased hardening,

(c) Annealing,

(d) Normalising,

(e) Nitriding.

Q6. With Respect to Container Ship: -

A. Sketch a ship’s indirect refrigeration system arranged for cooling containers stowed in stacks in the hold;

B. Describe the refrigeration system sketched in (A);

C. State the advantages of the system described in (A) compared with containers with their own refrigeration self-contained units.

Q8. (a) Sketch diagrammatically an auxiliary boiler automatic combustion control system and explain how it operates.

(b) Specify how ‘fail-safe’ conditions are ensured.

(c) How, the master controller follows steam pressure variations and air fuel ratio is adjusted?

Q9. (a) Explain electro chemical reactions and the difference between oxidation and reduction electrochemical reactions with examples. Which reactions occurs at the anode and cathode?

(b) Explain galvanic corrosion and discuss the different procedures to prevent it.