Q1. Describe briefly the methods of carrying out a bend test and an impact test. Illustrate the general form of the test pieces used and state how the final results are given for comparison of different materials. Of what practical use are the figures obtained?
Q2. As a second engineer, you are required to offer for survey, to a Classification Society, a crosshead of the engine following an unscheduled repair due to bearing failure.
A. Outline the information you would be required to provide prior to the survey. (6)
B. Briefly describe the survey procedure likely to be adopted stating with reasons the areas which should receive close attention. (5)
C. State with reasons what information would be requested by the surveyor and /or the operation required to be observed after re-assembly of the crosshead. (5)
Q5. With reference to main air turbochargers:
a) Give a reason why binding wire is frequently fitted near the top of the blades
b) Mention one fault that occasionally develops with binding wire in services,
c) Define the cause and identification under running conditions of turbine blade damage
d) State how (c) can be largely avoided.
Q4. In a situation where the main engine control system suddenly fails, and it is not possible to rectify this immediately
A. Explain the action that a 2nd engineer should take. (8)
B. State the instruction that the 2nd engineer should issue in order to ensure the continued safe and effective operation of the engine. (8)
Q9. a) State why onboard testing of fuel oil whilst taking bunkers can be advantageous. (4)
b) State how a representative fuel sample may be obtained during the bunkering operation. (4)
c) Explain how EACH of the following is formed during the combustion of fuel: - (4)
(i) Oxides of Nitrogen, NOx (ii) Carbon Monoxide, CO (iii) Oxides of Sulphur, SOx
d) State how the effects of sulphurous products of combustion on the engine system may be reduced.
Q6. A. Describe the survey procedure of an oil lubricated stern bearing and shaft. (8)
B. Explain how the integrity of the outboard seal of an oil lubricated stern tube may be proved before the dry-dock is flooded. (8)
Q3. a) Describe the Inspection and maintenance of flameproof enclosures for luminaries installed in hazardous condition. (10)
b) List the precautions to be taken while carrying out insulation resistance test of electrical equipment located in a hazardous area. (6)
Q9: A heavy Oil purifier vibrates badly when just shutting down and coming to a stop. Suggest some reasons for this vibration problem, when you have already made an inspection of its drive mechanism and casing and found nothing unusual.
Q8. What is a “Cam"? Explain its function. With reference to its application in diesel engines
Discuss the requirement and the type of cam used in
a) Fuel Pump
b) Indicator drive
c) Inlet Valve
d) Exhaust Valve
e) Starting air distributor. (16)
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