DieselShip's Online Content Library

Q1. Discuss the causes of vibration and noise in main gearing and describe detrimental effects on machinery and operating personnel. How would you detect the source(s) of this vibration and how might it be reduced to tolerable limits?

Q2. Describe the operation of overhauling, testing and setting a fuel valve for an auxiliary diesel engine. How the following diesel engine faults should be rectified. A. Smokey Exhaust; B. One cylinder exhaust temperature is abnormally low; C. The engine does not appear to be using any lubricating oil.

Q8. Describe the in-water survey to classification society requirements of the external underwater structure of a very large crude carrier.

Q4. Sketch an automatic sprinkler system for combating fire in spaces of a ship and state; A. The safety devices incorporated in the system; B. How the system changed; C. The parameters governing the volume of the pressure tank; D. Means provided to prevent the passage of sea water into the pressure tank.

Q9. With reference to main boiler super heater arrangements:

A. Compare the advantages and disadvantages of contra flow with parallel flow design.

B. Describe how the element tube banks are supported yet allow for expansion.

C. Describe how boiler carryover affects super heater effectiveness and condition.

Q6. An engine room is operating in the unmanned (UMS) mode, in the event of a failure of the UMS systems explain the arrangements a second engineer officer should introduce to operate the machinery in manual mode for a passage of 10 days’ duration.

Q8. A. Sketch and describe TWO methods that employ manometric means for measuring tank contents. B. State what corrections are made to the readings obtained by the methods described in (A) in order to gauge the mass contents? C. Explain how bunkering requirements may be estimated when no records of main engine fuel consumption are available on board.

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: With reference to sleeved keyless propeller assemblies: A. (i) State, with reasons, the metals used in the manufacture of the sleeve and tail end shaft; (ii)State the type and thickness of material used to bond the sleeve to the propeller boss. B. When removing the propeller from the tail end shaft, state why the following procedures are not recommended: (i) Application of push off force by means of wedges or jacks and draw off force by strong back; (ii) Expansion of propeller boss by concentrated local heating with gas torches. C.  State the correct procedure for the removal of the propeller from tail end shaft