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Q2. With reference to reciprocating air compressors explain the cause of the following faults.

A. Collapse of discharge valve springs;

B. Breakage of plate valves;

C. Overheating of the discharge air with an unrestricted air intake;

D. Inoperative piston rings.

Q2. How is the damage to steering engines prevented when they are situated adjacent to the rudder stock? Describe a steering system which is controlled from the bridge. Describe action of hunting gear?

Q3. Fire, Flooding and failure of supervisory equipment are few of the major dangers considered while designating a machinery space as periodically unattended. Describe methods to mitigate these dangers for a periodically unattended machinery space.

Q4. As a 2nd engineer prepare a list of the operating and maintenance procedure you would institute for care of the main engine giving reason for each procedure and the trouble likely to arise from neglect of such procedure.

Q5. A single forged shaft for a small gear pump is broken in the middle. Suggest some emergency repairs to the shaft to enable run the pump. State the type of repair and procedure for carrying out the repair. What is the most viable alternative to repair if no spares are available?

Q6. A. Explain the term water hammer indicating possible effects on the system; B. State how the risk of water hammer may be avoided? C. State with reasons why the testing and treatment of boiler water is essential? D. State with reasons, how boiler problems may be minimized if no water treatment is immediately available and steam supply must be maintained

Q7. It is found that the tie rods are persistently becoming slack: A. State, with reasons, the possible causes; B. State, with reasons, the likely effects on the engine if it is allowed to operate with slack tie rods; C. Explain how this problem can be minimized?

Q8.  Describe the procedure to be undertaken when, upon a routine schedule for changing fuel injector on a main engine, it is found that the injector body is seized and cannot be removed by conventional means

Q9. During normal engine operation, a turbocharger rapidly loses speed and the speed reduction is accompanied by appreciable noise -

A. State with reasons the possible causes.

B. Explain in detail how the engine might be safely operated if the damage caused by this incident is such that the turbocharger cannot function.

C. State with reasons the factors which may limit engine operating speed with the turbocharger out of operation.