Q1. Explain the working principles of a Swash Plate Pump and Hele-Shaw Pump. Compare their construction, operation, and efficiency. Discuss their applications in marine systems, highlighting their advantages and limitations (16)
Q2. Draw a line diagram of an accommodation air conditioning plant labelling the principle items and showing the direction of airflow. State how: A. Accommodation air temperature is controlled; B. Humidity is controlled within prescribed comfort limits; C. such an installation can contribute to the efficiency if ship’s main plant
Q9. With reference to main boiler super heater arrangements:
A. Compare the advantages and disadvantages of contra flow with parallel flow design.
B. Describe how the element tube banks are supported yet allow for expansion.
C. Describe how boiler carryover affects super heater effectiveness and condition.
Q3. With reference to a tubular heat exchanger, state the various types used on board a ship and explain with sketches how the construction, flow pattern, baffles, differ from each other depending upon the medium in use.
Q5. a) How is the power to weight ratio of an engine sought to be increased by continuous development? (8)
b) Discuss the limiting factors, what is the typical power to weight ratio of a slow speed marine diesel engine of current generation? (8)
Q4. With reference to hull cathodic protection systems of the impressed current type:
A. Sketch and describe such a system;
B. Explain how protection may be ensured for the rudder and propeller;
C. State any precautions that should be taken when this type of system is installed.
Q4. Exhaust gas cleaning system is one of the system used on board ship to reduce SOX emissions-
(a) Briefly discuss various types of Exhaust gas cleaning system used on board ship.
(b) What all data to be monitored and recorded when EGCS is in use to ensure that system meets all IMO regulations.
(c) What action you will take as second engineer if the system stopped working.
Q5. A. Examine in detail three common but entirely different reasons for loss of steering gear systems. B. State how failure is inhibited in the design, operation and maintenance of steering gear systems C. Describe how a vessel may make port upon irreparable failure of the steering telemotor
Q6. Hydrogen damage is a general term used for mechanical damage of metal caused by the
presence of hydrogen, briefly discuss the different types of hydrogen damage and how these damages can be prevented?
a) Hydrogen blistering (4)
b) Hydrogen embrittlement (4)
c) Decarburization (4)
d) Hydrogen attack (4)
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