DieselShip's Online Content Library

Q1. Oil traces have been found in the condensate tank of an auxiliary boiler:

(a) Describe the procedure to trace the source of contamination (8)

(b) List the contamination with reasons for its occurrence and the precaution to be taken to ensure safety of the boiler (8)

Q2. (a) Describe how cylinder liners are checked for wear (5)

(b) Explain how these measurements are recorded (5)

(c) Explain why allowance for wear is limited and what extent of the wear governs liner replacement (6)

Q3. State some built in measures by which the steering gear mechanism can be kept operational, in the event of breakages, pipe failures, motor burn out etc. (16)

Q4. Where a waste heat boiler is subject to persistent leakage at the tube / tube plate connection, suggest with sketches, methods of effecting a permanent repair. (16)

Q5. (a) What are the routines carried out on a lifeboat winch (6)

(b) What maintenance do the hand brake and Centrifugal brakes require (5)

(c) At what lowering velocity does the centrifugal brake operate (5)

Q6. Give reasons and remedies for the following faults in air compressors.

(a) Excessively hot discharge pipe (5)

(b) Intermediate stage relief valve lifting (5)

(c) Noticeable reduction in free air delivery (6)

Q7. With reference to auxiliary boiler safety valves state with reasons:

(a) What clearances need checking when lapping valves to seats (5)

(b) Why the drain must be clear (5)

(c) Why opening gear should be kept in good working order at all times (6)

Q8. With reference to a fuel oil purifier:

(a) What are the reasons that may cause the purifier to overflow? (6)

(b) What are the reasons for the water carry-over with the oil? (5)

(c) What are the probable reasons for vibration seen during purifier starting? (5)

Q9. Explain with a suitable diagram, the components of an auxiliary engine fuel valve? Briefly explain, the process of overhauling and pressure testing the fuel valve? (16)