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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)

Q2. (a) Explain how the information gathered from a diesel engine cylinder is analysed.(4)

(b) Explain how defects which result in poor cylinder performance are recognised from data gathered during the determination of cylinder power, stating how these defects influence cylinder power development. (6)

(c) Explain how defects resulting in poor cylinder performance which are mentioned in part (b) may be rectified. (6)

Q2. (a) Explain how the information gathered from a diesel engine cylinder is analysed.(4)

(b)  Explain how defects which result in poor cylinder performance are recognised from data gathered during the determination of cylinder power, stating how these defects influence cylinder power development. (6)

(c) Explain how defects resulting in poor cylinder performance which are mentioned in part (b) may be rectified. (6)

Q8. With reference to LNG diesel engine installations:

(a) Describe, with the aid of a sketch, a Gas Valve Unit, explaining its purpose and indicating where it is located in the gas train; (8)

(b)  Explain why ventilation and inert gas systems must be installed with the engine fuel gas system; (4)

(c)State why pilot injection must be provided when burning fuel gas, explaining how a pilot injection system operates. (4)

Q4. as chief engineer officer write a report to the company superintendent engineer concerning bacterial attack of lubricating oil in the sumps of the main engine and one of the generator engines. The report should explain how the attack was detected, damage found in the engines, investigations in the possible cause of the attack, how the immediate problem was resolved and how future incidents may be prevented. (16)

Q4. With reference to diesel engine SOx exhaust gas cleaning and pollution control:

(a) state, with reasons, which system parameters are monitored, explaining where the monitoring devices are located, how the data is stored and how data is made available. to regulatory authorities. (10)

(b) state how pollution of sea water can be caused by the use of SOx exhaust gas cleaning systems, explaining how such pollution is prevented. (6)

Q5. (a) Describe, with the aid of a sketch, a diesel engine air start system and the devices which are fitted to prevent or limit damage in the event of an explosion. (8)

(b) Explain how an explosion in a diesel engine air start system might occur. (4)

(c) As Chief Engineer Officer, outline the actions that should be taken to ensure that an explosion from the causes explained in part (b) may be avoided. (4)

Q7. (a)  Describe, with the aid of a sketch, a main engine fresh water cooling water system, incorporating HT and LT systems.

(b). Describe the charge air supply system for a turbocharged engine, explaining the purpose of each main part. (6)

Q8. (a) Describe the sequence of events that may lead to a crankcase explosion. (6)

(b) Describe an oil mist detector, explaining how it operates. (8)

(C) Describe how an oil mist detector operation is checked for accuracy. (2)

Q5. (a) Describe, with the aid of a sketch, the water/steam circulation system for the waste heat recovery system. (5)

(b) Explain how economizer circulation pumps are maintained in a cool condition to allow for prolonged operation without problem. (3)

(c) Describe how a waste heat recovery system steam pressure is maintained and the system operated when the associated diesel engine plant is operating on EACH of the following:

(i) Low engine load; (4)

(ii) Low steam demand. (4)