Q1. (a) Describe the actions to be taken by the Engineer Officer of the Watch on discovering a scavenge fire (12)
(b) State TWO dangers of allowing a scavenge fire to exist (4)
Q2. Explain the constructional differences between 2-stroke Slow Speed and 4-stroke Medium Speed diesel engines. (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)
Q4. With reference to marine diesel engines:
(a) State the purpose of a camshaft. (2)
(b) State TWO methods of driving a camshaft on a large marine diesel engine. (4)
(c) State the speed of the camshaft relative to the crankshaft on:
(i) A four-stroke engine: (2)
(ii) A two-stroke engine. (2)
(d) Sketch a fuel cam for a unidirectional diesel engine indicating EACH of the following:
(i) Point of injection. (2)
(ii) Peak. (2)
(iii) Slow return. (2)
Q5. List EIGHT mountings which must be present on auxiliary marine boilers. (16)
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