DieselShip's Online Content Library

Q6. With reference to bacteria harmful to humans in drinking and washing water:

(a) state the constraints placed on the installation and use of systems for shipboard production of freshwater; (3)

(b) state the maintenance and treatment recommended for freshwater tanks; (3)

(c) describe how the entire freshwater system can be made free from bacteria; (3)

(d) state an acceptable residual value in the freshwater tanks to ensure the correct concentration of treatment in the system. (1)

Q3. Describe, with the aid of a sketch, the operation of a static Oily Water Separator which conforms to current MARPOL regulations and utilises a pump on the discharge side of the separator. (10)

Q3. (a) Explain how power is transmitted through main propulsion shafting. (3)

(b) State THREE operational factors that may induce high stress in shaft coupling bolts. (3)

(c) Sketch a hydraulic type of shaft coupling bolt. (4)

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)

Q9. State the main electrical items covered in a Classification Society periodical survey. (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)

Q10. Describe, with the aid of a block diagram, the operation of a load sensing electronic governor controller for an a.c. generator. (10)

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)

Q13. (a) Explain why twin skeg rudders may be fitted on some vessels. (3)

(b) Explain the advantages of a twin skeg installation in modern vessels with a large cargo carrying capacity. (7)