DieselShip's Online Content Library

Q1. Write a report to the Superintendent Engineer regarding the failure of an engine to complete an automatically programmed Slow Turn operation and the actions taken to discover and rectify the cause of the problem after it had been determined that the starting air system and slow turning control system were operating correctly. (16)

Q1. Describe, with the aid of an S/N curve, the relationship between applied stress and the number of applied stress fluctuations in fatigue crack propagation. (5)

Define the term Stress Raiser, giving examples and explaining the influence of a stress raiser on the propagation of a crack. (5)

Define the term Fatigue Limit, explaining, with examples, how poor maintenance and poor machine operation can result in fatigue crack propagation even though a component has been designed to avoid fatigue cracking (6)

Q3. (a) Describe, with the aid of a sketch, the HT and LT cooling water systems for a combined pair of medium speed engines in an installation. (12)

(b) For the system described in part (a), explain how a shut-down engine is maintained at the correct temperature for immediate starting when the associated engine is also stopped and when the associated engine is running. (4)

Q6. As Chief Engineer Officer, write instructions for the actions to be taken in the event of a high temperature scavenge alarm being activated, due to a rapid rise in temperature, during a period of UMS operation, stating the reasons for EACH action. (16)

Q1. With reference to large, slow speed, crosshead type engines;

(a) explain the nature of the force acting on the transverse girder; (6)

(b) explain the nature and local defects that can occur in transverse girder; (6)

(c) explain the possible consequences of operating the engine with serious defects present in the transverse girder. (4)

Q8. With reference to slow speed diesel engine turbocharging:

(a) explain why electrically driven scavenge air blowers are sometimes fitted; (4)

(b) describe how a turbocharger may be disabled to allow for operation of the main engine in the event of failure of the turbocharger rotor; (8)

(c) describe the procedure for running an engine in the event of a turbocharger not being operational. (4)

Q4. With reference to diesel engine starting air systems:

(a) write instructions for the checking of the starting air system in order to determine the reason for an engine failing to turn over when the starting air system is activated; (6)

(b) Describe the procedure for checking and preparing a starting air receiver for survey; (6)

(c) Explain why cooling is required between the compressor stages and after the final stage, stating the arrangement used for draining condensate from the coolers. (4)

Q4. Explain with aid of sketches, the gas combustion process in a dual fuel medium speed main engine, operating with pilot injection. (10)

Explain exhaust is meant by exhaust gas recirculation and how this may be effective in reducing air pollution. (6)

Q4. With reference to medium speed diesel engine cylinder liners:

a. Explain the cause and effects of polishing and glazing; (6)

b. Explain the action of an anti-polishing ring during the operation of the engine; (5)

c. Describe how effective cylinder lubrication is achieved. (5)