EKG-SEPT-19

Q1. Sketch and describe the operation of four ram electro-hydraulic steering gear system. Indicate and explain the valve position for the operation of the system when one pump is isolated and unit is operating on two rams only.

Q2. With reference to Flue gas Inert gas system: a. Sketch and describe using a line diagram showing a typical ‘Inert Gas System’ used for inerting the cargo tanks of oil tankers, labeling the important component parts. b. State what oxygen content you would expect in the flue gases if good combustion is achieved.

Q3. 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?

Q4. Damage has occurred to the main engine exhaust valves and the fuel supplied at a particular port is suspected. The owner’s case, however, in the subsequent dispute may be weak because the fuel was ordered specifying only type and viscosity. A. Apart from fuel specification, describe how you, as Second Engineer, should have assisted the owners’ case when receiving the suspect fuel. B. Describe the ISO fuel standard that is to be used when ordering bunker fuel. C. Explain how the correct fuel standard is selected. D. Suggest, with reasons, why particular mention should be made of certain elements that might not be included in the fuel standard.

Q5. Sketch and describe a system for oil monitoring of bilge and tanker ballast discharges. What inputs are recorded? Explain the difficulties encountered with the efficient operation of the oil monitoring system.

Q6. A. Sketch a sealing arrangement for an oil lubricated stern tube. 
B. Identify the common forms of seal failure; State how oil loss due to seal failure can be restricted whilst on passage? 
C. What is the material used for sealing rings and propeller shaft liner?

Q7. A. Explain Creep; Brinelling; Fretting; Fretting corrosion; B. State, with reasons, where these may occur in ship propulsion System.

Q8. Discuss the cause 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.

Q9. With reference to Vacuum Sewage System:(i) Sketch & Describe a Vacuum Sewage System. (ii) State the advantages of Vacuum Sewage System. (iii) State the different causes of dropping vacuum.