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Q7. State why the following equipment’s require shut down during a major fire which has necessitated the evacuation of the machinery spaces:

(a) Settling and service tank valves. (4)

(b) Fuel transfer and supply pumps (4)

(c) Mechanical and natural ventilation (4)

(d) State how the fire is brought under control using the facilities available outside the machinery spaces. (8)

Q8. (a) Sketch a simple line diagram showing a shipboard oily water separator in series with a coalescing second stage. (10)

(b) Briefly describe the above arrangement and its operations also state the allowable oil content in p. p. m. of the discharge effluent from such an arrangement. (10)

Q5. An air cooler of a large two stroke marine diesel engine is showing poor performance. Suggest some measures you would initiate to rectify the problem and improve the performance. (16)

Q4. With reference to auxiliary boilers

(a) Briefly describe the maintenance procedures for oil burning equipment. (5)

(b) Explain the need for and the use of soot blowers. (5)

(c) Describe how a boiler should be taken out of service. (6)

Q8.a) Sketch a two-ram type hydraulic steering gear with a single Electro-hydraulic pumping unit. Show the hunting gear arrangement and indicate valve positions. (8)

b) State the purpose of, and describe the operation of (8)

i) hydraulic shock/buffer valves.

ii) Oil replenishing tank.

iii) Hunting gear.