DieselShip's Online Content Library

Q1. A Rating has been seriously injured by a "blow back" from the oil fired auxiliary boiler. As Second engineer, make a full report to Head office explaining the circumstances of the incident and the precautionary measures now taken to reduce the possibility of a similar occurrence in the future. (16)

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

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

- - - PREVIOUSLY ASKED - - -

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. 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)

Q5. A. Describe with the aid of sketches where necessary a vane type steering gear showing how to weight of the rudder and stock are carried and the arrangement that allow for wear down. (6)

B. State how the vanes described in (A) are secured and the method of sealing the edges. (5)

C. State how, if necessary, the steering gear is locked for rudder maintenance. (5)

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. Describe the preparation necessary before the application (in dry dock) of sophisticated or approved long life coating to the underwater surface of the hull. (6)

B. State the significance of the roughness profile. (5)

C. List the different sophisticated coatings which are available. (5)

Q8. Explain why, in spite of accurate alignment under static conditions use of flexible couplings and copious supply of lubricant, main reduction gearing in still subject to pitting, scuffing and other tooth damage; B. Discuss the significance of viscosity in relation to the function of marine turbine oils as used in main propulsion installations, stating how the viscosity is controlled and what could cause it to change in service.

Q9. A. Briefly describe the operation of an electrical or hydraulic main engine governor. (8)

B. For the type described indicate how failure can occur and the action to be taken if immediate correction cannot be achieved and the engine must be operated. (8)