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)