Tag: #mca

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With reference to deck machinery: (a) Sketch a line diagram showing the layout and components of a hydraulic system with a variable delivery, pressure compensated pump and accumulator, suitable for the operation of deck machinery (5) (b) Explain the advances of using electrically driven machinery over hydraulically driven winches and windlasses (5) Deck machinery Oct…

EK General Oct 2017 (Q6)

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With reference to bacteria harmful to humans in drinking and washing water: (a) State the constraints placed on the installation and use of systems for shipboard production of fresh water (3) (b) State the maintenance and treatment recommended for fresh water tanks (3) (c) Describe how the entire fresh water system can be made free…

EK Motor Jul 2017 (Q7)

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(a) Describe, with the aid of sketch, the arrangement of the gas and liquid fuel systems at the cylinder of a dual fuel 4-stroke engine, stating the input and output signals at the controller (12) (b) Describe the arrangement of the gas fuel piping system used for a 4-stroke dual fuel engine, stating the safety…

EK Motor Jul 2017 (Q6)

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With reference to two stroke, slow speed engine pistons: (a) Explain what is meant by the term thermal stress and how this can cause cracking of crown surface (4) (b) Sketch a cross-section of a piston, labeling the main components and indicating coolant flow (8) (c) State a cause of EACH of the following defects…

EK General Oct 2017 (Q5)

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(a) Describe TWO system of priming centrifugal pumps (6) (b) List the advantages of EACH of the priming methods described in part (a) (4) Pumps & system Oct 2017 (Q5)

EK Motor Jul 2017 (Q5)

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(a) Describe, with the aid of sketches, the procedure for lifting a cylinder cover from a slow speed crosshead engine, explaining how the lifting gear is attached to the cover (6) (b) State the risks that may be associated with lifting a cylinder cover using the procedure described in part (a) (c) Describe the arrangement…

EK General Oct 2017 (Q4)

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Describe, with the aid of a sketch, a Membrane Bioreactor type sewage treatment plant (10) Sewage system Oct 2017 (Q4)

EK General Oct 2017 (Q3)

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With reference to vessels fitted with podded propulsion systems capable of being rotated through 360°: (a) State the advantages claimed over conventional shafting and steering arrangements (6) (b) State with reason, the type of vessels that are most suited to this means of propulsion (4) Propeller, shafting & thrusters Oct 2017 (Q3)

EK General Oct 2017 (Q2)

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With reference to pneumatically operated control valves (a) State the reason for fitting valve positioners (4) (b) With the aid of a sketch, explain valve hysteresis and how it affects the process (4) (c) Describe how the design and routine maintenance can limit hysteresis (2) Control system Oct 2017 (Q2)

EK Motor Jul 2017 (Q3)

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