DieselShip's Online Content Library

Q1. Give that ignition quality of fuels bunkered at different may way; State how variation of fuel quality may be deterred during dieting engine operation; Describe a fuel pump arrangement, which will adjustment to compensate for variation of fuel quality; Explain the possible consequence of using fuel with good ignition quality without compensation.

Q2. Explain with the aid of sketches, the cycle of operation of either a free piston or an open cycle gas turbine installation. Discuss is advantages and limitations as the main means of propulsion on a ship as compared to conventional marine machinery.

Q9. A. With the aid of a block diagram describe the operation of an electronic governor fitted to an auxiliary diesel engine. B. An engine fitted with an electronic governor during load changes. Explain the possible causes.

Q4. Make a diagrammatic sketch of one unit of sulzer engine of the cross-head type showing the arrangement of the cylinder ports. Describe briefly the arrangement and explain how scavenging is affected

Q9. Sketch and describe the motor of a turbo-charge a showing the gloands arilized to ensure air and gas tightness. Discuss the consideration leading of suitable motor bearings, how the bearings may break down in sewage

Q6.  Discuss the importance of correct cylinder lubrication in a large diesel engine, explaining the possible consequences of both over and under lubrication.  Describe the qualities required in a cylinder lubricant for use in an engine burning high viscosity (heavy) fuel oil.  Comment on the timing of the injection of the lubricant in relation to the working cycle of the engine. Changes, if any, in the quality of the cylinder lubricating oil used for a large arrange diesel engine, with the imposition of Annex IV of MARPOL

Q8. With reference to bottom end bolts for medium speed four stroke engines:

A. Explain why bottom end bolts will ultimately fail under normal operating conditions;

B. Identify the features incorporated into bolt design to inhibit failure;

C. Explain how bolt failure may be hastened when maintenance is carried out;

D. Describe, as Second Engineer, your strategy for preventing bolt failure.

Q8. Define the term fatigue as applied to engineering components. Explain how fatigue failure is influenced by the presence of slag in welds; Define the term residual stress and explain how this can influence the fatigue life of a component; During a crankcase inspection, a crack has been discovered in the lower section of a bed plate transverse girder. Explain the action you, as Chief Engineer, would take to ensure safe operation the engine if facilities to repair the damage were not immediately available.

Q6. A. A number of main engine cylinder covers have been subjected to cracking during the preceding four months –

i. Explain possible reasons for this cracking;

ii. State with reasons the action you, as Second Engineer, would take in order to reduce the possibility of future cylinder cover cracking.

B. Cylinder liner wear has increased appreciably during the past six months. Write a brief report to the engineering superintendent concerning this matter explaining the possible causes the immediate action taken to deal with the problem and the action you, as Second Engineer, intend to take in order to reduce the risk of future incidents.