Question

QUESTION FIVE (a) Explain how Archimedes' principle and propulsion are related. (04 Marks) (b) Give any four classifications of ships (04 Marks) (c) A rescue navy speed boat whose engine is rate 100hp moves at a constant speed of 60 knots. For such a speed boat, its propeller power conversion is 7 arriving water to the propeller blade 15ms1, The total towing resistance to the speed boat is 575N. Compute the following parameters (6) Effective wake velocity (ii) Wake fraction coefficient (ii) Thrust force on the propeller (iv) Thrust deduction (v) Trust deduction coefficient (vi) Hull efficiency 0%. The speed of the (03 Marks) (02 Marks) (06 Marks) (02 Marks) (02 Marks) (02 Marks) QUESTION SIX (a) With the aid of a diagram, explain the use and operation of a fresh water generator. (10 Marks) (b) There have been considerable contemporary developments in the naval propulsion systems. The developments are inclusive of use of; (i) Nuclear Reactors (ii) Electric Motors For each of the mentioned development, explain the applicability, type of naval body that uses the development and the advantages and disadvantages of these developments. (15 Marks) END

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Answer 1

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