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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.

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.

Q6. With reference to the fuel standards ISO-8217-2017 discuss the amendments made as compared to its previous edition. Explain the significance of the following:

(a) Pour point, cloud point and cold filter plugging point.

(b) Cat fines

(c) Fatty Acid methyl Easter

(d) Dissolved H2S in fuel.

Q9.  Reverse osmosis is one of the alternative method for shipboard production of drinking water.

(a)  Describe using simple diagrams if necessary,  the principle of reverse osmosis.

(b) (i) Sketch a line diagram showing a single pass system for producing fresh water from sea water

(ii) Describe such a system.

Q5. With respect to Gas carrier, Sketch and describe a ship's reliquefaction system for conditioning and reliquetuction of liquefied cargoes like propane and butane.

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.

Q7. With reference to auxiliary boiler safety valve:

A. Describe, with aid of a Sketch the safety valves for an auxiliary boiler;

B. Identify, with reasons, the part that require particularly close attention during overhaul;

C. Describe how the safety valves are reset after an overhaul.

Q7. With reference to Gear pumps used for lubricating oil transfer.

(a) Sketch and describe a gear type pump indicating the flow of fluid.

(b) state the materials that gear type pump components may be manufactured from.

(c) specify THREE applications that are suitable for the employment of gear type pumps.

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.