DieselShip's Online Content Library

Q1. (a) Describe the procedure for:

(i) Riveting two plates. (5)

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

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

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)

Q3. (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)

Q4. (a) Describe why priming is required for a centrifugal pump. With the aid of a sketch, describe working of a primer for centrifugal pump. (10)

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

Q5. For an auxiliary engine, how can you possibly detect leaking or worn piston rings applying each of the following methods: (16)

a) Operational monitoring

b) Performance analysis

c) Direct inspection of the cylinder

Q8. Describe the procedure for the regular maintenance routines to be carried out on the various types of portable fire extinguisher on ships. (16)

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)

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)

Q9. Describe, with the aid of sketches, the procedure for checking and correcting the alignment of a pump shaft coupled to its driving motor. Explain the dial gauge (rim and face) method in detail, state the acceptable tolerances, and discuss the common causes of misalignment. (16)