Q4. (a) Describe a pressure relief device fitted on a diesel engine crankcase. Are these devices fitted on all sizes of the engine? (8)
(b) What attention do crankcase pressure relief devices require? (4)
(c) Name the factors which must be present for an explosion to occur in the crankcase of a diesel engine. (4)
Q2. With respect to 2-stroke and 4-stroke Diesel engines, describe
(a) What are the advantages and disadvantages of 2-stroke and 4-stroke engines? (8)
(b) Uses of each type of engine on board ship with reasons (8)
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