Q4. With reference to a tubular heat exchanger, state the various types used on board a ship and explain with sketches how the construction, flow pattern, baffles, differ from each other depending upon the medium in use. (16)
Q6. With reference to hull cathodic protection systems of the impressed current type:
a) Sketch and describe such a system. (8)
b) Explain how protection may be ensured for the rudder and propeller. (4)
c) State any precautions that should be taken when this type of system is installed. (4)
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