The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

This competency requires evidence of competency in the selection of appropriate test methods from a prescribed range of tests for various scenarios and the interpretation of test results against predetermined specifications and standards. The scenarios, materials and test results should be relevant to the foundry industry and may be drawn directly from the workplace or may be simulated case studies.

Tests may be conducted in either a workplace or suitable laboratory facility.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessors should ensure that candidates can competently and consistently:

select appropriate test methods

obtain repeatable results

interpret test results for a foundry

successfully complete several scenarios requiring the selection of different tests

obtain reproducible test results from testing across different samples requiring different sample preparation/test conditions.

Context of and specific resources for assessment

Assessment may occur on the job or in an appropriately simulated environment. Access is required to real or appropriately simulated situations, including work areas, materials and equipment, and to information on workplace practices and OHS practices.

Where applicable, reasonable adjustment must be made to work environments and training situations to accommodate ethnicity, age, gender, demographics and disability.

Access must be provided to appropriate learning and/or assessment support when required. Where applicable, physical resources should include equipment modified for people with disabilities.

Method of assessment

Assessment must satisfy the endorsed assessment guidelines of the MEM05 Metal and Engineering Training Package.

Assessment methods must confirm consistency and accuracy of performance (over time and in a range of workplace relevant contexts) together with application of underpinning knowledge.

Assessment methods must be by direct observation of tasks and include questioning on underpinning knowledge to ensure its correct interpretation and application.

Assessment may be applied under project related conditions (real or simulated) and require evidence of process.

Assessment must confirm a reasonable inference that competency is able not only to be satisfied under the particular circumstance, but is able to be transferred to other circumstances.

Assessment may be in conjunction with assessment of other units of competency where required.

Guidance information for assessment

Assessment processes and techniques must be culturally appropriate and appropriate to the language and literacy capacity of the candidate and the work being performed.

Required skills

Required skills include:

analysing data

selecting and setting up appropriate tests

solving problems

performing tests

interpreting results

reporting results

Required knowledge

Required knowledge includes:

standards:

needs for standards

standards organisations

structure and operations of Standards Australia (SA)

role of National Association of Testing Australia (NATA):

tensile testing

methods for tensile testing e.g. AS 1391 or equivalent international standard

determination of tensile properties

general impact testing:

factors affecting impact properties of materials

impact testing (AS 1544) or equivalent international standard

dropweight tear test (AS 1330) or equivalent international standard

hardness testing:

Vickers Hardness Testing (AS 1817, Part 1) or equivalent international standard

Brinell Hardness Testing (AS 1816, Part 1) or equivalent international standard

Rockwell Hardness Testing (AS 1815, Part1) or equivalent international standard

other hardness testing methods (e.g. Equotip and other rebound methods)

the principles of operation, uses and limitations of optical emission spectroscopy (OES) otherwise known as atomic emission spectroscopy (AES)

the purpose and scope of the following tests to the level required to determine the suitability or otherwise of the test but not to the level of conducting the test or interpreting the test:

fatigue/flex testing

creep testing

strain test and measurement

static shear and bend test

ultraviolet-visible (UV-VIS) spectrophotometry

infrared spectroscopy (IR)

gas chromatography (GC)

X-ray fluorescence (XRF)

flame photometry

atomic absorption spectrometry (AAS)

scanning electron microscopy (SEM)

mathematics relevant to the collation and reporting of test data

the impact of chemical composition on the foundry process and product

the potential implications of the variety of adjustments that could be made in response to test results

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Standards and industry codes of practice

Where reference is made to industry codes of practice and/or Australian/international standards, it is expected that the latest version will be used

Prescribed range of tests

Prescribed range of tests means tests that may be conducted by the foundry tradesperson and where the need for the test has been determined by a metallurgist or other authority according to the procedures of the enterprise and the requirements for the casting and mould materials being used and the product being cast. The prescribed range of tests may include:

OES

tensile/compression testing which may include testing for tensile strength, compressive strength, elongation, reduction of area, yield stress, yield point, proof stress, Young's modulus, elastic/plastic region and deformation or viscoelastic deformation

hardness testing - Vickers, Brinell, Rockwell and Durometer tests

impact testing including Izod, Charpy and Dropweight Tear

Other tests

Other tests include

fatigue/flex testing

creep testing

strain test and measurement

static shear and bend test

UV-VIS spectrophotometry

infrared spectroscopy (IR)

gas chromatography (GC)

X-ray fluorescence (XRF)

flame photometry

atomic absorption spectrometry (AAS)

scanning electron microscopy (SEM)

Prepare sample

Prepare sample means that:

representative sub-samples have been taken

samples are ground and milled

the sample is ready for the test

Prepare instrument

Prepare instrument includes:

checking calibration

ensuring the availability of required consumables

curve generation where OES test is required

setting machine conditions

checking machine function

Materials

Materials for mechanical tests include metals, polymer based materials and other solid materials on which mechanical testing is relevant