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?
Apply concepts of resistivity, resistance and capacitance to series and parallel AC and DC circuits
|
|
Calculations are performed to solve problems related to resistance, voltage drop, current and power in series and parallel circuits Completed |
Evidence:
|
Calculations are performed to solve problems related to temperature coefficient of resistance and change of resistance of a conductor with a change of temperature Completed |
Evidence:
|
Basic relationships that give total equivalent capacitance for capacitors arranged in series and parallel combinations are derived Completed |
Evidence:
|
Relationships that give total equivalent capacitance to solve numeric problems involving alternating current (AC) and direct current (DC) circuits are applied Completed |
Evidence:
|
Explain how principles of electrolytic action apply to electrical cells and batteries
|
|
Kirchhoff’s circuit laws are explained Completed |
Evidence:
|
Calculations to solve problems involving currents, voltage drop and terminal potential difference for cells connected to form batteries in series and in parallel are performed Completed |
Evidence:
|
Calculations to solve secondary cell charging and discharging problems are performed Completed |
Evidence:
|
Calculations to solve problems related to the efficiency of cells are performed Completed |
Evidence:
|
Analyse a magnetic circuit
|
|
Key parameters of magnetic circuits are identified Completed |
Evidence:
|
Formula for calculating the amount of flux generated by a multi turn solenoid coil carrying a current to give the B/H relationship is applied Completed |
Evidence:
|
Significance of the varying slopes in the B/H curves for a solenoid coil with air, cast iron, cast steel and mild steel cores is explained Completed |
Evidence:
|
How a magnetic circuit may be created by using a toroidal core within the solenoid coil is shown Completed |
Evidence:
|
Calculations to solve problems relating to magnetic circuits using different materials in different parts of their cores, including air gaps, are performed Completed |
Evidence:
|
Effect on flux density of applying an alternating magnetising force to an iron core is shown diagrammatically Completed |
Evidence:
|
Interpret electromagnetic consequences of a conductor moving relative to a magnetic field
|
|
Faraday’s and Lenz’s Laws are applied to solve problems relating to the electromagnetic induction of EMF and current Completed |
Evidence:
|
Generation of EMF is illustrated by a simple, single loop conductor rotating in a uniform magnetic field and how this EMF may be tapped to an external circuit as either AC or DC is explained Completed |
Evidence:
|
How alternating electrical quantities may be represented by rotating phasors is illustrated and explained Completed |
Evidence:
|
Relationships between instantaneous, maximum, average and RMS values of sinusoidally alternating electrical quantities is derived Completed |
Evidence:
|
Mathematical problems are solved by applying relationships between instantaneous, maximum, average and RMS values of sinusoidally alternating electrical quantities Completed |
Evidence:
|
Analyse circuits that incorporate combinations of resistive, inductive, and capacitive elements
|
|
Time constant for different circuit combinations subjected to DC EMF’s is defined Completed |
Evidence:
|
Calculations are performed to solve problems involving time constants in DC circuits with changing rates of current in resistive/inductive elements and changing voltages through resistive/capacitive circuit elements Completed |
Evidence:
|
Differentiation is made between inductive reactance, capacitive reactance and impedance as applied to AC circuits Completed |
Evidence:
|
Effects of inductive and capacitive reactance upon phasor relationships between applied AC voltage and current are shown Completed |
Evidence:
|
Concept of total impedance is applied to solution of problems involving single phase AC quantities in the presence of both resistive/inductive and resistive/capacitive circuit elements, arranged in either series or parallel Completed |
Evidence:
|
Power factor is defined and concepts of real and reactive power usage are applied to solution of problems involving RL and RC elements Completed |
Evidence:
|
Analyse operation of polyphase AC circuits
|
|
How three phase AC may be developed out of simple single phase AC is explained Completed |
Evidence:
|
Voltage and current relationships between line and phase in both Star and Delta 3 phase connections are derived Completed |
Evidence:
|
Standard Star to Delta and Delta to Star conversion relationships for current and voltage are derived Completed |
Evidence:
|
Numeric problems involving both balanced and unbalanced circuit loads are solved Completed |
Evidence:
|
Relationships between kW, kVA and kVAr for 3 phase AC circuits is derived Completed |
Evidence:
|
Calculations are performed using the relationship between kW, kVA and kVAr to solve problems in 3 phase AC circuits Completed |
Evidence:
|
Describe basic operating principles of shipboard DC machinery
|
|
Schematic circuits are prepared for separately excited, series, shunt and compound connected generators and motors to illustrate wiring arrangements used with DC machines Completed |
Evidence:
|
EMF equation for a DC generator to solve shipboard problems is applied Completed |
Evidence:
|
Torque equation for a DC motor to solve shipboard problems is applied Completed |
Evidence:
|
Expression linking back EMF parameters for a DC motor is derived and used to solve shipboard problems Completed |
Evidence:
|
Various losses that can occur in DC motors and generators are calculated Completed |
Evidence:
|
Perform calculations related to operation of AC generators
|
|
Construction features of the AC synchronous generator are explained Completed |
Evidence:
|
EMF equation for an AC generator is derived, taking into account distribution and pitch factors Completed |
Evidence:
|
Expression for the magnitude and speed of the rotating flux generated by a three-phase supply is derived Completed |
Evidence:
|
Voltage regulation for synchronous generator is defined Completed |
Evidence:
|
Effect of power factor on load characteristic of an AC generator is illustrated Completed |
Evidence:
|
Perform calculations related to operation of three-phase AC induction motors
|
|
Construction features of the AC induction motor are explained Completed |
Evidence:
|
Expression for slip of an induction motor rotor is derived and applied to frequency of its rotor EMF and current Completed |
Evidence:
|
Expression for magnitude of rotor EMF and current is derived, taking into account distribution and pitch factors Completed |
Evidence:
|
Relationships between rotor torque, rotor losses and slip indicating factors that affect torque are outlined Completed |
Evidence:
|
Significance of torque/slip curves for an induction motor is explained Completed |
Evidence:
|
Relationship between starting torque and applied voltage is established and consequences of this upon starting methods are outlined Completed |
Evidence:
|
Explain operating principles of basic electrical instrumentation
|
|
Schematic circuit diagrams are prepared that illustrate the main features and applications of moving coil and moving iron voltmeters and ammeters Completed |
Evidence:
|
Schematic circuit diagrams are prepared that illustrate the main features and applications of air and iron cored dynamometer type wattmeters Completed |
Evidence:
|
Dangers associated with current and voltage transformers on high current and voltage systems are identified Completed |
Evidence:
|