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?
Calculate heat energy with and without phase change
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Enthalpy is applied to heat mixture calculations with or without phase change Completed |
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Enthalpy is applied to calculate resultant conditions of hot wells involving multiple returns Completed |
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Steam conditions in a system when using throttling devices and separators are calculated Completed |
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Entropy is distinguished from enthalpy Completed |
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Entropy values are determined from standard tables Completed |
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Analyse change of phase and state diagrams
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Tables and/or diagrams are use to find enthalpy and entropy values for liquid, part liquid-part vapour and vapour states Completed |
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Carnot cycle is outlined Completed |
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Rankine cycle is outlined Completed |
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Isentropic efficiency is explained Completed |
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Problems are solved involving the efficiency of steam turbines operating in the Rankine cycle Completed |
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Apply Dalton’s law of partial pressures to steam condensers
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Dalton’s Law is applied to calculate air and condensate extraction from condensers Completed |
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Problems are solved involving cooling water mass flow and cooling water pump work Completed |
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Apply chemical equations for complete and incomplete combustion
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Atomic and molecular weights and kilogram-mol are explained Completed |
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Calorific value of a fuel is calculated by chemical formula Completed |
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Mass of air required for stoichiometric combustion is calculated by gravimetric and volumetric analysis Completed |
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Air fuel ratio is determined when supplied with composition of fuel and exhaust gas analysis Completed |
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Apply gas laws to analyse internal combustion engine efficiencies
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Universal gas constant form AVOGADRO S hypothesis is determined Completed |
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Heat transfer is calculated for constant volume and constant pressure processes Completed |
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First law of thermodynamics is applied to thermodynamic processes in a closed system Completed |
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Second law of thermodynamics is applied to find thermal efficiency of Carnot cycle Completed |
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Mathematical formula is applied to solve problems related to ideal constant volume air standard cycle Completed |
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Mathematical formula is applied to solve problems related to diesel and dual cycles Completed |
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Calculate performance of internal combustion and gas turbine engines
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P/V and out of phase engine indicator diagrams are analysed Completed |
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Work, power, mean effective pressure and thermal efficiency of internal combustion engine cycles is calculated Completed |
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Heat transfer to jacket cooling systems is calculated Completed |
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Open and closed systems for gas turbines are outlined Completed |
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Temperature/entropy diagrams are applied to illustrate gas turbine cycles Completed |
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Power, isentropic efficiencies, thermal efficiency, work and fuel consumption for gas turbine cycles is calculated Completed |
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Methods to increase efficiency of gas turbines are specified Completed |
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Reheaters and intercoolers and how they improve efficiency is explained Completed |
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Analyse air compressor performance
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Compressor types are classified Completed |
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Volumetric efficiency at free air conditions is explained Completed |
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Work is calculated for isothermal and adiabatic compression, and effect of clearance for reciprocating compressor Completed |
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Pressure ratio for compressor types is analysed Completed |
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Problems are solved relating to multi-staging and intercooling Completed |
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Heat transfer to air or cooling water from an air compressor is calculated Completed |
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Formula to calculate work and efficiency of centrifugal compressors is derived Completed |
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Analyse vapour compression refrigeration cycles
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Design parameters for a vapour compression cycle are explained Completed |
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Pressure/enthalpy diagram is prepared for a refrigeration cycle Completed |
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Heat rejected, work done and coefficient of performance (COP) for a basic cycle is calculated Completed |
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Effect of sub cooling and superheating is shown on a temperature/entropy diagram Completed |
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COP is calculated with evaporators operating at two different pressures Completed |
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Apply psychrometric principles to solve air conditioning problems
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Comfort conditions for air conditioning systems are defined Completed |
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Key parameters used in defining air condition are illustrated on a psychrometric chart Completed |
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Cooling loads are calculated Completed |
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Problems associated with air delivering and distribution methods are analysed Completed |
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Methods of controlling noise and vibration in air conditioning systems are analysed Completed |
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Analyse different methods of heat transfer
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Heat flow through composite divisions is calculated Completed |
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Insulation dimensions and interface temperatures are determined Completed |
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Problems relating to radiated energy are solved by applying Stefan-Boltzmann Law Completed |
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Problems in heat exchangers are solved by applying log mean temperature difference Completed |
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Relative efficiency of contra-flow heat exchange is determined Completed |
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