DieselShip's Online Content Library

Q1. You are a 2nd engineer on a ship fitted with an open loop scrubber, during a loaded voyage, the display panel remote and local panel stop working. Write a letter to your office on the breakdown and the steps you have taken to bring back to normal operations, making references to the relevant regulations? (16)

Q2. a) Define creep and specify the conditions under which it occurs? (8)

b) Discuss three metallurgical processing techniques that are employed to enhance the creep resistance of metal alloys (8)

Q3. (a) Describe, with the aid of a sketch, an open loop system for reducing SOx emissions from engine exhaust gas, explaining how the system operates whilst the vessel is in open waters. (8)

(b) Describe, with the aid of a sketch, a closed loop scrubber system for removing SOx from engine exhaust gas, explaining the operation of this unit and stating when it would be used. (8)

Q4. With reference to a tubular heat exchanger, state the various types used on board a ship and explain with sketches how the construction, flow pattern, baffles, differ from each other depending upon the medium in use. (16)

Q5. With respect to Refrigeration systems uses onboard:

a) How do we choose environmentally friendly refrigerants for ships? (6)

b) How do CFC’s, HCFC’s, HFC’s and natural refrigerants like ammonia and carbon-di-oxide compare in terms of ozone depletion (ODP) and global warming potential (GWP)? (4)

c) What are the benefits and challenges of using natural or low-GWP refrigerants on marine vessels? (3)

d) Explain the steps you will take to ensure that release of refrigerant gases from the plant in minimized during normal operation and during maintenance activities. (3)

Q6. A. Describe with the aid of a sketch, the main engine ancillary equipment for automatic monitoring and regulation of fuel viscosity. (6)

B. Explain the operation of equipment described in (A). (5)

C. Discuss the single fuel concept. (5)

Q7. a) Explain the concept of a fail-safe and fail-set system on a ship, providing examples of each system. (6)

b) Describe the advantages and disadvantages of both systems. (5)

c) How do the design differences impact the overall reliability and safety of the vessel. (5)

Q8. A. Sketch a line diagram showing the layout components of a hydraulic system with a variable delivery, Pressure compensated pump and accumulator, suitable for the operation of deck machinery. (8)

B. Describe the operation of the system sketched in part (a). (8)

Q9. What are the differences between destructive and non-destructive testing methods for materials? Discuss the advantages and disadvantages of each approach and provide examples of specific tests used in both categories to ensure the integrity and quality of materials used in shipbuilding. (16)