DieselShip's Online Content Library

Q5. You were asked to join a ship as second engineer. During briefing you were informed about frequent boiler uptake fires happening onboard. prepare a plan for to reduce boiler uptake fires. How will you monitor the progress of your plan and what instructions you will issue to the watch keepers?

Q2. With reference to Flue gas Inert gas system:

A. Sketch a line diagram showing a typical 'Inert Gas System' used for inerting the cargo tanks of oil tankers, labelling the component parts.

B. Describe the system.

C. State what oxygen content you would expect in the flue gases if good combustion is achieved.

Q7. Discuss the causes of corrosion and the means by which corrosion of the following may be limited by manufacturers and ship’s personnel respectively:

A. Internal and External surfaces of auxiliary steam lines;

B. External surfaces of auxiliary boilers;

C. Water boxes of seawater coolers and condensers;

D. Main sea water inlet pipes.

Q3. With respect to the properties of fuel oil, explain the significance of the following terms.

(a) Calculated Carbon Aromaticity Inbox (CCAI).

(b) Open flash point and Closed flash point.

(c) The importance of Sodium to Vanadium Ratio.

(d) Octane Number.

Q5. Hyper mist system in your ship often gets activated on top of Incinerator unit. Write a letter to company, to introduce an additional layer of activation for system, so that false alarm activation is stopped.

Q1. Describe the importance of maintaining the quality of lube oil in maintaining the proper health of marine diesel engines highlighting the role of

(a) Automatic back flushing filters.       (b) Lube oil separators

(c) Magnetic filters                               (d) Visual Inspection                (e) Periodic laboratory tests.

Q7. With reference to Keyless Propeller:

A. Sketch a section through a keyless sleeved propeller.

B. State the advantages of using a keyless sleeved propeller

C. State with reason, Which metal sleeve should be made for contact with the forged mild steel tail shaft?

D. State the material uses to bond the sleeve to the propeller and the general thickness of the bonding material.

Q9. With reference to Vacuum Sewage System

(a) Sketch & Describe a Vacuum Sewage System.

(b) State the advantages of Vacuum Sewage System.

(c) State the different causes of dropping vacuum.

Q8. Detail the desirable properties of a refrigerant. Make a table and compare following refrigerants for use in a provision cooling plant for a 50000 DWT Oil tanker: R-22, R-134a.