DieselShip's Online Content Library

Q1. (a) State the factors in the storage of welding electrodes which will assist in producing good quality welds. (2)

(b) Explain the importance of edge preparation before welding. (2)

(c) Sketch TWO methods of plate edge preparation. (2)

(d) A hairline crack is detected in a pipe, as Chief Engineer Officer, state the factors to be taken into account in reaching a decision on the method of repair. (4)

Q2. As Chief Engineer Officer onboard a vessel which has lost 50 litres of lubricating oil from the stern tube system to sea overnight, write a report to the Superintendent Engineer outlining the actions taken to rectify the leakage and any other further recommendations. (10)

Q1. With reference to plate heat exchangers, explain how EACH of the following design aspects promote heat transfer:

(a) material selection;(5)

(b) flow pattern; (3)

(c) extended surface area. (2)

Q4. State the inspections, instructions and maintenance that should be carried out on main sea water pipelines, strainers and ship's side valves to minimise the risks of engine room flooding. (10)

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 refrigeration systems:

(a) explain why undercooling of the refrigerant at the condenser outlet is desirable; (3)

(b) describe, with the aid of a sketch, how a heat exchanger could be incorporated in the circuit to enhance undercooling; (5)

(c) explain the possible consequences of the refrigerant having a dryness fraction at the compressor suction. (2)

Q8. As Chief Engineer Officer, write a report to the Superintendent Engineer naming the items and describing the examinations that were carried out during a safety equipment survey with regard to fire safety. (10)

Q8. As Chief Engineer Officer, describe the examinations that were carried out during a safety equipment survey with regard to fire safety. (10)

Q9. (a) Explain why it is necessary to provide reverse power protection for a.c. generators operating in parallel. (2)

(b) Sketch a generator protecting circuit. (5)

(c) Explain how to check the operation of the reverse power trip. (3)

Q9. Describe, with the aid of a circuit diagram, the operation of an automatic voltage regulator (AVR) which employs the use of thyristors. (10)

Q11. (a) Explain the principle of operation of an insulation resistance test, stating why the test is carried out on a regular basis. (6)

(b) Describe how EACH of the following electrical tests is carried out:

(i) resistance; (2)

(ii) continuity. (2)

Q14. With reference to the structure of a large passenger ship, describe the requirement for preventing the spread of fire and smoke. (10)

Q13. With reference to defects found in the steelwork of ballast tanks:

(a) explain the factors that may cause defects in ballast tanks; (4)

(b) state, with reasons, areas most likely to be affected and how they may be indicated; (4)

(c) state methods employed to minimise damage, caused by the factors in (a). (2)

Q12. Explain the causes and effects of panting and pounding, indicating the affected areas. (5)

(b) Describe the constructional details designed to resist panting and pounding. (5)