Q3. With reference to a main engine jacket water cooling system:
(a) Explain, with the aid of sketches, how the jacket water temperature is maintained at its optimum value. (8)
(b) State the possible effects on the engine if the jacket water temperatures are maintained outside the desired value. (8)
Q4. Describe, with the aid of a sketch, a typical single element temperature control for a large lubricating oil system. (16)
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)
Q4. Describe, with the aid of a sketch, a method of remotely monitoring the contents of a fuel oil tank (16)
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