DieselShip's Online Content Library

Q1: A number of main engine exhaust valves have suffered cracking during the preceding four months A. Explain possible reasons for cracking; B. State with reasons the instruction, you as second engineer, would issue in order to reduce the possibility of future cylinder cover cracking

Q1. 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; B. Briefly describe the survey procedure likely to be adopted stating with reasons the areas which should receive close attention; 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.

Q6. A. Describe the events leading to a crankcase explosion.

B. State how overheating might be indicated other than by a mist detector.

C. Discuss the procedure to follow in the invent of overheating being indicated.

D. State how severity of a crankcase explosion is limited.

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

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.

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.

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?