With reference to diesel engine crankcases:
(a) explain why crankcases may have relief valves fitted;(3)
(b) outline the circumstances which may cause the relief valves to operate;(5)
(c) state a safety detection system which may be fitted.(2)
Study Notes MDE Unit 6 Q1 Quiz
(a) Outline the actions which must be taken, by the on-watch engineer when the engine crankcase oil mist detector activates.(5)
(b) Sketch a crankcase explosion relief door, labelling the MAIN components.(5)
Study Notes MDE Unit 6 Q2 Quiz
The daily engine log shows the engine crankcase pressure gauge is indicating a much higher value than the normal reading.
(a) State the implications of this and the immediate actions that should be taken.(2)
(b) Outline the checks and investigations that should be undertaken to ascertain the cause of this increased crankcase pressure.(8)