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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)

Q1. 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)

Q2.  (A)Explain action to be taken to ensure that the main engine may be operated in the event of an exhaust gas economiser developing a serious leak which cannot be immediately repaired (6).

(b) Describe how the heat transfer surfaces of economiser are maintained in a clean condition (4)

(c) Explain the action which should be taken in the event of a fire in the economiser. (6)

Q3. As Chief Engineer Officer write a report to the engineering superintendent regarding the failure of a high-pressure fuel pump unit on an electronically controlled engine. The report must explain the nature of the failure, how the failure was detected, and the immediate action taken.

The report must also explain the actions taken to replace the pump and the steps taken to minimise the risk of future similar fuel pump failures. (16)

Q9. A. Describe, with the aid of a sketch, a system for burning gaseous fuel in a two-stroke diesel engine, indicating safety features fitted and explaining why the gas has to be injected into the cylinder rather than mixed with the combustion air outside of the cylinders. (12)

B. Define the term Methane Slip, explaining how it occurs and why it is undesirable. (4)

Q7. (a) Explain how the build-up of residue in the scavenge space of a large slow speed two stroke engine is minimised by design, operation, and maintenance. (10)

(b) Explain the possible damage which could be caused by a scavenge fire. (6)

Q6. Write instructions for the actions to be taken by a duty engineer following activation of a slow speed main engine exhaust gas differential temperature alarm during a period of unmanned machinery operation. The instructions must cover the period from activation of the alarm to return of the main engine to normal operation. (16)

Q7. (a) State, with reasons, THREE engine operating parameters which should initiate an automatic slowdown if engine operation is outside of set value conditions; (6)

(b) Describe how the operation of each slowdown listed in part (a) may be tested; (6)

(c) List two engine operating parameters which should initiate an automatic engine shutdown, in EACH case explaining why this parameter MUST shut down the engine (4)

Q6. With reference to two stroke, slow speed engines:

Explain what is meant by the term thermal stress and how this can cause cracking of the crown surfaces; (4)

Sketch a cross section of a piston, labelling the MAIN components and indicating coolant flow; (8)

State a cause of EACH of the following defects:

(i) Burning of the crown upper surfaces; (2)         (ii) Carbon deposits in the cooling spaces. (2)

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)