Q1. With reference to scavenge fires:
(a) State FOUR possible contributing factors. (4)
(b) Explain how EACH factor mentioned in (a) contributes. (8)
(c) State FOUR indications. (4)
Q4. (a) Describe how the thrust of the propeller is transmitted to the hull of the ship. (4)
(b) Describe, with the aid of a sketch, how the surfaces, within the thrust block, transmitting the thrust are separated by the lubricating oil. (8)
(c) Explain the importance of the oil temperature within the thrust block (4)
Q3. (a) Answer the following:
(i) State why the simultaneous injection of fuel oil and starting air into a main engine cylinder is undesirable. (2)
(ii) Explain how simultaneous injection of fuel oil and starting air is prevented. (4)
(b) Answer the following:
(i) Explain how a leaking air start valve is detected while the engine is running. (4)
(ii) Describe the actions to be taken upon discovery of a leaking air start valve. (6)
Q3. (a) Draw a line diagram of a main lubricating oil system for a large two-stroke cross-head type diesel engine. Label all the principle components of the system. (16)
Q3. Describe the procedure to change the fuel supply system of the main propulsion engine from high viscosity fuel to low viscosity fuel such as diesel oil whilst on passage. (16)
Q1. With reference to shutting down a main propulsion diesel engine plant, after a voyage, explain EACH of the following:
(a) The conditions to be met for transferring from Bridge control to Engine Room Control just prior to shut down (8)
(b) FOUR precautions to be taken after shutdown, in order to ready the main engine for maintenance (8)
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