The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!
From the Wiki University
What evidence can you provide to prove your understanding of each of the following citeria?
Interpret an energy balance diagram for a shipboard steam plant
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Ideal theoretical thermodynamic cycle for the operation of a steam plant is outlined Completed |
Evidence:
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Why actual expansion of steam through a turbine differs from ideal cycle is explained Completed |
Evidence:
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Typical heat losses around a steam plant are identified Completed |
Evidence:
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Effect of air preheating, feed heating and economisation upon energy balance of steam plant’s thermodynamic cycle are explained Completed |
Evidence:
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Typical heat (and/or mass) balance diagram for a ship’s steam plant is interpreted Completed |
Evidence:
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Explain construction and operation of marine high-pressure water boilers
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Advantages of water tube boiler over fire tube boiler for shipboard applications are outlined Completed |
Evidence:
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Construction and operation of a ‘D’ type membrane furnace boiler with superheater, economiser and air pre-heater is explained Completed |
Evidence:
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External fittings required by Classification Society Rules on any large boiler are identified Completed |
Evidence:
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Internal fittings of a boiler’s main steam drum are identified Completed |
Evidence:
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How automation is applied to boiler control is clarified Completed |
Evidence:
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Start up, operation and shut down of a main propulsion steam boiler is outlined Completed |
Evidence:
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Explain construction and operation of a main propulsion steam plant
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How common forms of blading and rotor construction are manufactured is clarified Completed |
Evidence:
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How casings of common marine steam turbines are fitted out is clarified Completed |
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Principles of thermodynamics are applied to explain expansion of steam in a typical marine turbine Completed |
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Importance of start up and warming-through procedures for a steam turbine set is conveyed Completed |
Evidence:
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Checks required during routine turbine operation are explained Completed |
Evidence:
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Safety devices for a steam turbine set are identified and normal emergency shut-down procedures are identified Completed |
Evidence:
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Operation of turbines under normal and emergency conditions is outlined Completed |
Evidence:
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Explain auxiliary machinery required to support operation of main propulsion steam turbines and boilers
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Construction and operation of different types of auxiliary machinery needed to support main propulsion steam turbines and boilers is outlined Completed |
Evidence:
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Construction and operation of steam and electric motor prime movers required for driving auxiliary machinery are outlined Completed |
Evidence:
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Explain configuration and operating principles of different steam distribution systems used in steam-powered vessels
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Configuration and operating principles of different steam distribution systems is outlined Completed |
Evidence:
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Typical pressure reducing and pressure control valves suitable for steam service are outlined and illustrated Completed |
Evidence:
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Explain operation principles of close feed systems used by boiler/turbine sets
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Difference between an open and a closed feed system is clarified Completed |
Evidence:
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Closed feed system is outlined Completed |
Evidence:
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Pressure feed heaters are outlined Completed |
Evidence:
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Chemical injection equipment suitable for use on any ship’s main feed system is explained Completed |
Evidence:
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Explain feed and boiler water treatment
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Recommended limits of characteristics for boiler water and recommended intervals at which tests are undertaken are clarified Completed |
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Reasons for treating boiler water are outlined Completed |
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Different types of hardness in water, their consequences if left untreated, and ways of minimising their effect are explained Completed |
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How corrosion within a boiler is minimised by treating boiler water is explained Completed |
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Causes and ways of avoiding carry-over and caustic embrittlement are explained Completed |
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Safety requirements for handling feedwater and boiler water treatment chemicals are explained Completed |
Evidence:
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Explain transmission of power from the steam turbine main engine to the propeller
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Why reduction gearing is required between steam turbines and propeller is clarified Completed |
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Generation of tooth form is outlined Completed |
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Double helical gearing and difference between single and double reduction gearing are explained Completed |
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Applications of epicyclic gearing are explained Completed |
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Function of flexible couplings in a turbine/gearing set is clarified Completed |
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Components of a driveline from main wheel connection, aft, to propeller are listed Completed |
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Methods and mechanisms for lubricating a driveline are detailed Completed |
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Explain procedures for preventing and responding to fires and explosions specific to steam propulsion plant
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Causes, symptoms and means of preventing and extinguishing fires associated with steam propulsion plant are detailed Completed |
Evidence:
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Protective devices associated with boilers to minimise risk of fires, explosions and water shortages are identified Completed |
Evidence:
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Routine inspection and maintenance requirements to prevent fires, explosions and water shortages are outlined Completed |
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