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)
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