Q1. Describe the procedure to be undertaken for overhaul of an oil cooled Main Engine Piston detailing the OEM tools used for overhauling the piston. Also, describe the procedure for testing of the Main engine oil cooled piston after overhaul. (16)
Q2. It is found that the main engine cylinder head studs are breaking during voyage.
a) State, with reasons, the possible causes. (6)
b) State, with reasons and the likely effects on the engine if it is allowed to operate with broken studs. (5)
c) Explain how this problem can be minimized. (5)
Q3. Describe the procedure for carrying out the rocking test of a deck electrohydraulic crane. Please explain how will you ensure that you get the correct readings and how do you interpret the readings obtained from this test for planning future overhauls of the crane. (16)
Q4. During the overhaul of medium- speed auxiliary diesel generator you find that the white metal of one of the bottom end bearings has cracked. Explain how you would fit a spare bearing and enumerate the various tests you would carry before putting the machine back into service. (16)
Q5. Under Continuous survey of machinery (CSM) the bottom end bearing of a large slow speed engine is due for survey.
A. As second engineer, explain the procedure involved in complete inspection of a bottom end bearing. (8)
B. List the precaution to be taken during inspection. (4)
C. What tests are carried out on completion of survey and re-assembly. (4)
Q5. A Plate type LT cooler of the centralized cooling water system on your ship is showing poor performance. What measures you would initiate to rectify the problem and improve the performance. (16)
Q6. As a Second engineer in a ocean going ship, what actions you will take if the specification of the bunkers received in the last port is substantially different than the old bunkers with respect to: (a) Density (b) Viscosity (c) Cat fines (d) Sulphur content (e) Water content. (16)
Q7. With reference to a domestic refrigeration system
a) What are the indications of overcharge, undercharge and air ingress into the system? (8)
b) How are the above abnormalities rectified? (8)
Q8. What is understood by risk on board ship? As a 2nd engineer discuss various methods for hazard identification and assessment of risk available on board. (16)
Q9. Sewage treatment plant is due for internal inspection. List in detail the procedure along with various parts to be included in the inspection and the safety precautions for carrying out the inspection of the STP. (16)
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Q7. Sewage treatment plant is due for internal inspection. List the detailed procedure for carrying out this inspection with the specific checks to be carried out as per OEM instructions after it is stopped and emptied. Also discuss the safety precautions to be taken in your answer
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