DieselShip's Online Content Library

Q1. (a) Describe the procedure for:

(i) Riveting work (5)

(ii) Removing a stud from the plates. (5)

(b) What are the essential tools required for the procedure in (a) above. (6)

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)

Q4. (a) Describe uses of compressed air onboard the ship. (6)

(b) Describe maintenance schedule of various systems on main air compressor. (6)

(c) Describe Isolation procedure of main air compressor before starting any work (4)

Q5. (a) Describe why priming is required for centrifugal pumps, with diagrammatic sketch describe working of primer for centrifugal pump. (10)

(b) Why balance holes are provided in the impeller? (6)

Q3. Work is being carried out in drydock on a large sea water inlet chest and the valves. Describe the inspection you would carry out:

(a) As the work starts (8)

(b) During and after the work. (8)

Q7.a) Describe how A. E, crankshaft deflections are measured. (6)

b) State how the measurements can be checked for accuracy. (5)

c) Specify with reasons other checks that should be made on the crankshaft. (5)

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. Describe the procedure for the regular maintenance routines to be carried out on the various types of portable fire extinguisher on ships. (16)

Q9. With reference to exhaust valves of an auxiliary diesel engine.

(a) Describe how valves are reconditioned (8)

(b) Explain how valve timing is checked and corrected. (8)