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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)

Q2. (a) Sketch a typical power indicator card for a slow speed marine diesel engine. (6)

(b) Explain how the card may be used to assess the power developed in the cylinder. (10)

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. As engineer officer of the watch explain the procedure to be followed in the event of a crankcase oil mist alarm on a bridge controlled, constant speed, main propulsion engine fitted with a controllable pitch propeller. (16)

Q5. State the possible cause, and outline the remedial action that should be taken when EACH of the following faults occur during starting of an automatic package boiler:

(a) The boiler starts and the fan runs with the control dampers correctly positioned, the boiler then locks out before purging is completed. (4)

(b) The boiler purges correctly, but the ignitors fail to spark, and the boiler locks out (4)

(c) The boiler purges correctly, the ignitors spark, but the boiler fails to light up and locks out. (4)

(d) The boiler flame flashes up but after about 5 seconds the automatic control locks the boiler out. (4)