DieselShip's Online Content Library

Q1. With reference to plate heat exchangers, explain how EACH of the following design aspects promote heat transfer:

(a) material selection;(5)

(b) flow pattern; (3)

(c) extended surface area. (2)

Q2. With reference to pneumatically operated control valves:

(a) state the reason for fitting valve positioners; (4)

(b) with the aid of a sketch, explain valve hysteresis and how it affects the process; (3)

(c) describe how the design and routine maintenance can limit hysteresis. (3)

Q3. With reference to vessels fitted with podded propulsion systems capable of being rotated through 360°:

(a) state the advantages claimed over conventional shafting and steering arrangements; (6)

(b) state, with reasons, the type of vessels that are most suited to this means of propulsion. (4)

Q4.  Describe, with the aid of a sketch, a Membrane Bioreactor type sewage treatment plant. (10)

Q5. (a) Describe TWO systems of priming centrifugal pumps. (6)

(b) List the advantages of EACH of the priming methods described in part (a). (4)

Q6. With reference to bacteria harmful to humans in drinking and washing water:

(a) state the constraints placed on the installation and use of systems for shipboard production of freshwater; (3)

(b) state the maintenance and treatment recommended for freshwater tanks; (3)

(c) describe how the entire freshwater system can be made free from bacteria; (3)

(d) state an acceptable residual value in the freshwater tanks to ensure the correct concentration of treatment in the system. (1)

Q7. With reference to deck machinery:

(a) sketch a line diagram showing the layout and components of a hydraulic system with a variable delivery, pressure compensated pump and accumulator, suitable for the operation of deck machinery(5)

(b) discuss the advantages of using electrically driven machinery over hydraulically driven winches and windlasses. (5)

Q8. Explain the legal, administrative and technical responsibilities of a Chief Engineer Officer.(10)

Q9. State the main electrical items covered in a Classification Society periodical survey. (10)

Q10. (a) State FIVE essential electrical services that are able to be operable under fire conditions.(5)

(b) Explain how electric cables for the essential services in part (a) pass through bulkheads whilst maintaining gas tight and water tight integrity. (3)

(c) State the requirements for the cables which supply electrically driven emergency fire pumps.(2)

Q11. With reference to large electrical transformers on board ships:

(a) state where these transformers may be used; (1)

(b) state a typical efficiency range for a transformer; (1)

(c) state the regulations pertaining to transformers; (3)

(d) state the protective devices that are fitted; (2)

(e) describe the maintenance requirements. (3)

With reference to cargo hatch covers on large container ships:

(a) describe how they are tested for weathertightness; (2)

(b) explain how the weight of the hatch and containers is transferred to the ship's structure whilst allowing for deflections of the hull in a seaway;(3)

(c) describe, with the aid of a sketch, the type and location of damage that can occur due to wear of the hatch supporting arrangements. (5)

Q13. (a) With reference to bilge keels:

(i) describe how the design and method of attachment reduces the possibility of damage to the shell plate; (5)

(ii) state what testing must be carried out. (2)

(b) Explain why the bilge keels do not extend the full length of the vessel. (3)

Q14. As chief engineer officer outline the essential information to be supplied to the drydock management prior to drydocking a vessel. (10)