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Q8. (a) Describe, with the aid of a sketch, the main engine auxiliary equipment for automatic monitoring and regulation of the fuel viscosity.

(b) Explain the operation of the system, which incorporates the equipment described in Q.8(a).

(c) For an engine which is maneuvered on distillate fuel but operated on heavy residual oil at sea, static, as second engineer, the standing orders you would issue for the procedure to be adopted when changing form distillate fuel to heavy residual oil and vice versa.

Q9. Explain why it is necessary to heat heavy oil before burning it in the cylinder of an internal combustion engine. Describe a system whereby the oil temperature can be automatically maintained at the correct figure. Show the means employed for manually controlling the temperature in the event of failure of the automatic controls. (16)