PMLTEST520A - Perform complex tests to measure engineering properties of materials
Assessor Resource
PMLTEST520A Perform complex tests to measure engineering properties of materials
Assessment tool
Version 1.0 Issue Date: March 2024
This unit of competency covers the ability to prepare test specimens and perform multi-stage mechanical tests on them. The unit requires personnel to create test conditions that suit the materials intended use, optimise measurement procedures and recognise critical measurement points during the tests.
The unit also covers data analysis and troubleshooting procedures/equipment that have led to atypical data or results.
This unit of competency has the following prerequisite(s):
PMLTEST411A Perform mechanical tests.
This unit of competency is applicable to laboratory personnel in the construction materials industry sector.
Industry representatives have provided case studies to illustrate the practical application of this unit of competency and to show its relevance in a workplace setting, at the end of this unit of competency under the section "This competency in practice".
You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)
Evidence Required
List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.
The Evidence Guide describes the underpinning knowledge and skills that must be demonstrated to prove competence.
Critical aspects of competency
Competency must be demonstrated in the ability to perform consistently at the required standard. In particular, assessors should look to see that the candidate:
selects test methods, operating parameters and test ranges to suit the material and its intended use
prepares and orients test pieces precisely
safely sets up, starts up and shuts down equipment
maintains close attention to measurement procedures, accuracy and precision during lengthy complex tests
calculates/determines required engineering properties with appropriate accuracy, precision and units
recognises atypical data/results and traces artefacts and problems with procedures or equipment
records and reports data/results in accordance with enterprise procedures
maintains security, integrity and traceability of all samples, test pieces and documentation.
Underpinning knowledge
Competency includes the ability to apply and explain:
principles and concepts underpinning test procedure such as:
stress, strain, pressure including total and effective stress
properties of materials
failure modes of materials
application of results to engineering design and construction
sample preparation procedures
principles and concepts related to equipment/instrument operation and testing
function of key components of the equipment/instrument
effects on test of modifying equipment/instrument variables
basic equipment/method troubleshooting procedures
use of calibration charts
calculation steps to give results in appropriate units and precision
enterprise and/or legal traceability requirements
relevant health, safety and environment requirements.
Assessment context and methods
This unit of competency is to be assessed in the workplace or simulated workplace environment.
The following assessment methods are suggested:
review of results obtained by the candidate over a period of time to ensure accurate and consistent results are obtained within required timelines
inspection of testing records and workplace documentation completed by the candidate
observation of candidate conducting a range of complex tests on engineering materials
feedback from clients, peers and supervisors
oral or written questioning.
In all cases, practical assessment should be supported by questions to assess underpinning knowledge and those aspects of competency which are difficult to assess directly. Questioning techniques should suit the language and literacy levels of the candidate.
engineering materials testing laboratory with appropriate test equipment, instruments and samples, standard operating procedures and test methods.
This competency in practice
Construction materials
A consulting company is investigating a possible dam site and needs to assess a particular soil in the foundation. They request a geotechnical testing authority to determine the permeability of the soil. A laboratory technician checks the client request and inspects the soil sample, noting that it is plastic, clay and fissured. The technician checks the dam design parameters and notes that the overburden pressure will be 500 kPa.
They decide to use a triaxial permeability test using a constant head configuration. The technician trims a cylindrical test piece, determines the sample's bulk density and uses the trimmings to determine its moisture content. The test piece is mounted in a triaxial test cell and the equipment carefully de-aired. All pressure gauges, regulators and transducers are checked and the equipment is leak tested. A confining stress is applied and after allowing the sample to come to equilibrium, it is back saturated. The cell pressure is increased to 500 kPa and as the sample consolidates, the technician monitors the sample volume change and pore water pressure. A differential pressure is applied in stages and the water flow through the sample is optimised. After reaching a steady state the flow rate is monitored to determine the sample permeability.
After taking sufficient readings to ensure a valid measurement, the technician prepares plots of permeability and time and reports the steady state values. After completing the test, the technician shuts down the equipment in the recommended sequence, cleans and restores all items. He/she removes the test piece and determines the after-test moisture content.
Key Competencies
The seven key competencies represent generic skills considered for effective work participation. The bracketed numbering against each of the key competencies indicates the performance level required in this unit. These are stand-alone levels and do not correspond to levels in the Australian Qualifications Framework (AQF).
Level (1) represents the competence to undertake tasks effectively
Level (2) represents the competence to manage tasks
Level (3) represents the competence to use concepts for evaluating and reshaping tasks.
Collecting, analysing&organising information
Communicating ideas&information
Planning&organising activities
Working with others and in teams
Using mathematical ideas and techniques
Solving problems
Using technology
Level 2
Level 2
Level 2
Level
Level 2
Level 3
Level 3
Submission Requirements
List each assessment task's title, type (eg project, observation/demonstration, essay, assingnment, checklist) and due date here
Assessment task 1: [title] Due date:
(add new lines for each of the assessment tasks)
Assessment Tasks
Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.
The range of variables relates to the unit of competency as a whole. It allows for different work environments and situations that will affect performance.
Where reference is made to industry codes of practice, and/or Australian/international standards, it is expected the latest version will be used.
All operations must comply with relevant standards, appropriate procedures and/or enterprise requirements. These procedures include or have been prepared from:
Australian and international standards such as:
AS ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories
AS 1289. Methods of testing soils for engineering
AS 1012. Methods of testing concrete
AS 2981. Methods of sampling and testing asphalt
DIN 19683-series Soil testing in agricultural hydrology- Physical laboratory tests
material safety data sheets (MSDs)
standard operating procedures (SOPs)
quality manuals, equipment and procedures manuals
equipment startup, operation and shutdown procedures
calibration and maintenance schedules
enterprise recording and reporting procedures
production and laboratory schedules
material, production and product specifications.
Preparation of samples may include:
moisture conditioning and compaction of soil
trimming to required size and shape
orientation of test pieces
polishing
curing concrete test pieces.
Tests and procedures could include:
consolidation of soil (for example, one-dimensional, triaxial)
shear testing of soil and rock (for example, total stress, effective stress, direct stress, triaxial stress)
permeability of soil, rock and concrete (for example, falling head, constant head)
stability and flow of asphalt
fatigue and creep of metals, polymers and concrete.
Hazards may include:
microbiological organisms and agents associated with soil
chemicals such as acids and solvents
sharps and hand tools
flammable liquids and gases
cryogenics such as dry ice and liquid nitrogen
fluids under pressure such as steam and industrial gases, hydraulics
disturbance or interruption of services
crushing, entanglement, cuts associated with moving machinery or falling objects.
Hazard control measures may include:
ensuring access to service shut off points
recognising and observing hazard warnings and safety signs
labelling of samples, hazardous materials and equipment
machinery guards
handling and storage for hazardous materials and equipment in accordance with labelling, materials safety data sheets and manufacturer's instructions
identifying and reporting operating problems or equipment malfunctions
cleaning equipment and work areas regularly using enterprise procedures
using personal protective clothing and equipment such as hard hats, hearing protection, gloves, safety glasses, coveralls and safety boots
following established manual handling procedures
reporting abnormal emissions, discharges and airborne contaminants such as noise, light, solids, liquids, water/waste water, gases, smoke, vapour, fumes, odour and particulates to appropriate personnel.
Health, safety and environment
All operations to which this unit applies are subject to stringent health, safety and environmental (HSE) requirements, which may be imposed through State or Federal legislation, and these must not be compromised at any time. Where there is an apparent conflict between performance criteria and HSE requirements, the HSE requirements take precedence.
All operations assume the potential hazardous nature of samples and require standard precautions to be applied. Users should access and apply current industry understanding of infection control issued by the National Health and Medical Research Council and State and Territory Departments of Health. All operations are performed in accordance with standard operating procedures.
Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.
Observation Checklist
Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice
Yes
No
Comments/feedback
Review test request and sample documentation to identify required test parameters and intended use of bulk material
Identify hazards and enterprise control measures associated with the sample, preparation/testing methods and equipment
Inspect sample(s), compare with specifications, record and report discrepancies
Liaise with client when samples and/or request forms do not comply with enterprise procedures
Match required parameters with suitable test methods, available equipment and instrument specifications
Plan parallel work sequences to optimise throughput of multiple sets of samples, as required
Prepare test specimens in accordance with test method
Conduct preliminary measurements to establish initial dimensions and conditions
Store test specimens and residual sample materials to maintain their integrity
Set up equipment/instruments in accordance with test method
Perform pre-use and safety checks in accordance with enterprise procedures and manufacturers specifications
Identify faulty or unsafe components and equipment and report to appropriate personnel
Check calibration status of equipment and quarantine out of calibration or faulty items
Position and secure test specimen in test equipment/instrument
Conduct preliminary measurements to determine optimum test conditions and instrument settings
Perform each measurement stage in sequence, terminating each stage at the appropriate end point
Record all test measurements, observations and factors that may impact on quality of results
Remove test piece and conduct post-test measurements
Shut down equipment and store used test pieces in accordance with enterprise procedures
Confirm data is the result of valid measurements
Perform required calculations and ensure results are consistent with estimations and expectations
Record results with the appropriate accuracy, precision and units
Analyse trends in data and/or results and report "out of specification" or atypical results promptly to appropriate personnel
Trouble shoot procedure or equipment problems which have led to atypical data or results
Use established safe work practices to ensure personal safety and that of other laboratory personnel
Minimise the generation of wastes and environmental impact
Ensure the safe disposal of laboratory wastes
Clean, care for and store equipment and consumables in accordance with enterprise procedures
Enter approved data and results into laboratory information management system
Maintain security and confidentiality of enterprise information and laboratory data
Maintain equipment and calibration logs in accordance with enterprise procedures.
Forms
Assessment Cover Sheet
PMLTEST520A - Perform complex tests to measure engineering properties of materials
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Assessment Record Sheet
PMLTEST520A - Perform complex tests to measure engineering properties of materials
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