Q5. (a) Describe the sequence of events that may lead to a crankcase explosion. (6)
(b) Describe an oil mist detector, explaining how it operates. (8)
(C) Describe how an oil mist detector operation is checked for accuracy. (2)
Q2. a. Describe, with the aid of a sketch, a main engine fuel oil circulating system incorporating the MGO and HFO service tanks, a fuel change over system, heating and viscosity control system and tank return system. (10)
b. Write instructions for changing the system described in part (a) of the question from MGO to HFO, indicating the checks to be made during the changeover. (6)
Q7. A. Describe how crosshead bearing and guide clearances can be checked. (6)
b. Describe, with the aid of a sketch, the procedure for checking the condition of a crosshead engine bottom end bearing surface. (10)
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