EKG-NOV-19
Q1.
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.
Q2. 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.
Q3. 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.
Q4. Cast iron is most widely used metal after steel in Marine Engineering. Most cast irons consist of graphite in steel like matrix. Discuss the variation of properties that may arise with reference to pearlitic grey cast iron and spherical grey cast iron. Describe briefly the treatment necessary to produce these two types of Irons.
Q5. Sketch a sealing arrangement for an oil lubricated stern tube. Identify the common forms of seal failure; State how oil loss due to seal failure can be restricted whilst on passage? What is the material used for sealing rings and propeller shaft liner?
Q6. 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.
Q7. 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.
Q8. Discuss 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 Respect to Container Ship: – A. Sketch a ship’s indirect refrigeration system arranged for cooling containers stowed in stacks in the hold; B. Describe the refrigeration system sketched in (A); compared with containers with their own refrigeration self-contained units.
Q2. 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.
Q3. 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.
Q4. Cast iron is most widely used metal after steel in Marine Engineering. Most cast irons consist of graphite in steel like matrix. Discuss the variation of properties that may arise with reference to pearlitic grey cast iron and spherical grey cast iron. Describe briefly the treatment necessary to produce these two types of Irons.
Q5. Sketch a sealing arrangement for an oil lubricated stern tube. Identify the common forms of seal failure; State how oil loss due to seal failure can be restricted whilst on passage? What is the material used for sealing rings and propeller shaft liner?
Q6. 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.
Q7. 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.
Q8. Discuss 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 Respect to Container Ship: – A. Sketch a ship’s indirect refrigeration system arranged for cooling containers stowed in stacks in the hold; B. Describe the refrigeration system sketched in (A); compared with containers with their own refrigeration self-contained units.
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