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Q3. What factors would you consider in deciding whether to open up a cylinder unit for overhaul? After opening the unit and preparing for assembly, how would you decide whether to renew or re-use piston rings?

Q4. A. Describe THREE different patterns of tube used in exhaust gas boilers; B. Give TWO reasons why a tube is condemned; C. Describe how it is replaced by a spare tube; D. Suggest with reasons the possible consequences of allowing an exhaust gas boiler to run dry during full power operation of the main engine.

Q8. Explain in detail how you would isolate one of sprinkler system for routine maintenance. Describe all tests and inspections you would make and how you would return the system to service.

Q5. With reference to air receivers and bottles explain with reasons: A. Why regular systematic internal inspection is advisable? B. Which internal areas of large receivers should receive particularly close examination? C. How bottles are inspected internally and what parts should be closely examined? D. How the condition of a bottle or receiver that cannot be inspected internally is checked?

Q9. Severe engine vibration has recently become evident when the main engine for which you are responsible operates within a certain speed range –

A. State, with reasons, the possible causes of such vibration;

B. State the consequences of operating the engine under such vibratory conditions;

C. Describe the procedure you, as Second Engineer, would implement in order to investigate and rectify the problem.

Q2.  Describe three ways in which each of the following defects would reveal itself during full power operation of an engine. - A. Cracked liner; B. Defective fuel valve; C. Overheated bottom end bending, D. Inefficient turbocharger

Q7. Fatigue is one of the main causes of crankshaft failure - A. Indicate on a sketch the most likely location of a fatigue crack; B. Explain how a fatigue failure is identified; C. Describe how a fatigue crack may be initiated; D. Describe, with the aid of sketches, the methods used to inhibit fatigue cracks.

Q9. What are the effects of following on the sluggishness of steering gear operations;

A. Air entrapped in hydraulic oil;

B. Worn pins and weak springs in hunting gear;

C. Shock valves leaking

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?