DieselShip's Online Content Library

Q1. Discuss the factors that lead to the selection of materials for use in a sea water cooled, multi-tubular heat exchanger. (10)

Q5. Describe, with the aid of a sketch, the principle of operation of a capacitance electrode level measuring transmitter. (10)

Q3. With reference to propeller cavitation;

(a) define cavitation (2)

(b) describe FOUR detrimental effects of propeller cavitation (8)

Q4. With reference to pump selection, state any TWO types of pump for EACH of the following applications, stating why they are suitable.

(a) bilge pumping (2) (b) Cargo oil stripping (2)              (c) Sewage sludge (2)

(d) Lubricating oil circulating (2)               (e) Sea water circulating (2)

Q5. (a) Sketch the hydraulic circuit for a ram type steering gear that complies with the single failure concept and automatic isolation. (6)

(b) Describe how automatic isolation, for the hydraulic circuit sketched in part (a), is achieved within 45 seconds should leakage of system oil occur. (4)

Q6. With reference to the treatment of domestic water for potable use.

(a) describe the principle of operation of a steriliser that uses silver irons; (4)

(b) State the advantages of silver iron sterilisation over other methods; (2)

(c) State the inspections and maintenance that should be carried out on EACH of the following;

(i) Fresh water tanks (2)

(ii) calorifiers (2)

Q7. (a) State a block diagram of a fully automated air conditioning system for accommodation spaces, annotating the relevant temperatures and relative humidities throughout the system. (7)

(b) Describe how bacteria are prevented from multiplying to a harmful level in an air conditioning system. (3)

Q8. As chief engineer officer appointed to a newly acquired vessel, describe the inspection that should be carried out to ensure satisfactory condition and operation of the ship’s fire fighting equipment. (10)

Q9. Describe, with the aid of a black diagram, how automatic starting load sharing and stopping of generators in response to load changes is effected. (10)

Q10. With reference to star delta starters used for three phase induction motors;

(a) explain in detail why this type of starter is employed. (4)

(b) explain, with the aid of a circuit diagram, the sequence of operation of a star delta starter. (6)

Q11. With reference to electrical system protective devices, explain the purpose of EACH of the following;

(a) overcurrent protection (2)         (b) Short circuit protection (2)

(c) No-volt protection (2)               (d) Reverse power protection (2)

(e) Preferential tripping (2)

Q12. (a) Describe, with the aid of sketch, how a hydraulically operated folding hatch cover opens and closes. (7)

(b) Explain how the water tightness and security of the hatch cover sketched in part (a) can be ascertained before proceeding to sea. (3)

Q13. (a) state the advantages and disadvantages of aluminium alloy in ship building. (4)

(b) Describe, with the aid of sketch, a method of welding aluminium panels. (6)

Q14. With reference to the international conventional for the control and management of ship’s Ballast Water and Sediments;

(a) state the aims of the Ballast Water Management Convention; (2)

(b) Explain the difference between ballast water standards D-1 and D-2; (2)

(c) State with reasons, the documentation required by ships in international traffic to manage their Ballast Water and Sediments; (6)