DieselShip's Online Content Library

Q1. Describe the procedure for testing a steering gear within 12 hours of sailing. (16)

Q2. With reference to refrigeration systems used on board ships:

(a) With the aid of sketch show the location of the gas charging connection. (6)

(b) Explain the correct method of charging refrigerant. (10)

Q3. With reference to the disposal of bilge water from the machinery spaces:

(a) Explain when it is NOT permissible to discharge the bilge water overboard, even via an oily water separator. (8)

(b) State the maximum permissible oil content of the overboard discharge. (2)

(c) Identify the documentation to be completed and state by whom, following such an operation. (6)

Q4. With reference to compressed air systems, explain the PURPOSE of EACH of the following:

(a) Fusible plug on compressor discharge (4)

(b) Fusible plug on air receiver (4)

(c) Bursting disc on water cooled air compressor (4)

(d) Drain valve (unloader) on compressor (4)

Q4. With reference to main diesel engine starting air lines:

(a) Describe the main cause of a starting air line explosion. (8)

(b) Explain how a leaking start air valve can be identified while the engine is running. (4)

(c) State four different safety devices which can be incorporated into the starting air line to limit the damage caused by an explosion. (4)

Q5. (a) Describe, with the aid of a sketch, the bilge injection system. (12)

(b) State the purpose of fitting a bilge injection system on board a ship. (4)

Q6. With reference to main distribution systems fitted with preference trips:

(a) State why the preference trip is fitted. (2)

(b) Explain the operation of a THREE stage trip. (8)

(c) State THREE circuits that can not be connected to the preference trip giving a reason for EACH (6)

Q7. With reference to electrical motors:

(a) State the routine maintenance that is necessary (8)

(b) Describe the tests carried out to prove good electrical condition. (8)

Q8. With reference to transferring large quantities of fuel from low tanks, such as double bottom storage tanks, to higher wing bunker tanks:

(a) Explain the possible effects on the stability of the vessel. (8)

(b) State the important checks to be made before and during the fuel transfer operation. (8)

Q9. Explain the meaning and purpose of EACH of the following ship terms:

(a) Transverse watertight bulkhead (4)

(b) Bilge keel (4)

(c) Shear strake (4)

(d) Cofferdam (4)