Q2. With reference to the treatment of lubricating or fuel oil:
(a) State the functions of a purifier (4)
(b) State the functions of a clarifier (4)
(c) State TWO constructional differences found in the bowls of a purifier and clarifiers (8)
Q3. With reference to the disposal of bilge water from the machinery spaces:
(a) Explain when it is NOT permissible to discharge the bilge water overboard, even via an oily water separator. (8)
(b) State the maximum permissible oil content of the overboard discharge. (2)
(c) Identify the documentation to be completed and state by whom, following such an operation. (6)
Q4. (a) With reference to a control system, list FOUR examples of a measured variable. (4)
(b) Explain the meaning of the term two step control, giving one example of its use. (6)
(c) Explain the meaning of the term proportional control, giving one example of its use. (6)
Q6. (a) State FOUR different causes of earth faults. (8)
(b) For EACH cause stated in (a), explain how the fault is rectified. (8)
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