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Evidence Guide: PMAOPS512B - Determine mass transfer loads

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

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

 

PMAOPS512B - Determine mass transfer loads

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare for work.

  1. Identify work requirements
  2. Identify and control hazards
  3. Coordinate with appropriate personnel
Identify work requirements

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Identify and control hazards

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Coordinate with appropriate personnel

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate mass flow rates of streams.

  1. Calculate mass flow rate of plant streams from volumetric data, correcting for changes in density
  2. Calculate mass flow rate of individual components of plant streams from their concentrations
  3. Calculate mass accumulation (+ or -) within a plant item.
Calculate mass flow rate of plant streams from volumetric data, correcting for changes in density

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate mass flow rate of individual components of plant streams from their concentrations

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate mass accumulation (+ or -) within a plant item.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate mass change due to a chemical reaction.

  1. Determine yield from reaction of all significant products
  2. Determine mass output of all significant products arising from the reaction for specified reactant inputs.
Determine yield from reaction of all significant products

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Determine mass output of all significant products arising from the reaction for specified reactant inputs.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Conduct mass balance over process components.

  1. Determine desired boundaries for mass balance calculation
  2. Determine possible sources of data required from the plant
  3. Match and adjust sources of data to desired boundary for mass balance
  4. Determine overall mass balance
  5. Determine mass balance for each significant component/ reactant and product
  6. Determine the adequacy (or otherwise) of the process/plant heating/cooling system to meet production requirements.
Determine desired boundaries for mass balance calculation

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Determine possible sources of data required from the plant

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Match and adjust sources of data to desired boundary for mass balance

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Determine overall mass balance

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Determine mass balance for each significant component/ reactant and product

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Determine the adequacy (or otherwise) of the process/plant heating/cooling system to meet production requirements.

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

The Evidence Guide provides advice on assessment and must be read in conjunction with the Performance Criteria, Required Skills and Knowledge, the Range Statement and the Assessment Guidelines for the Training Package.

Overview of assessment

Assessment of this unit should include demonstrated competence on actual plant and equipment in a work environment. The unit will be assessed in as holistic a manner as is practical and may be integrated with the assessment of other relevant units of competency.

Assessment will typically be by a mass balance project(s).

This unit of competency requires a significant body of knowledge which will be assessed through questioning and the use of what-if scenarios both on the plant and off the plant.

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

Competence must be demonstrated in the ability to complete a mass balance in a structured way, taking real data from an operating plant.

Consistent performance should be demonstrated. In particular look to see that:

realistic boundaries are drawn for the mass balance which align with practical sources of data from the plant

data is collected from the plant with minimum disruption to production

theoretical and practical requirements for the mass balance are consistent

the mass balance data is used to identify and contribute to solutions for plant problems.

This will typically be assessed by one or more mass balance projects on an operating plant. One complex mass balance, or a number of simple mass balances, are required to demonstrate competence.

Context of and specific resources for assessment

Assessment will require access to an operating plant over an extended period of time, or a suitable method of gathering evidence of operating ability over a range of situations. A bank of scenarios/case studies/what-ifs will be required as will a bank of questions which will be used to probe the reasoning behind the observable actions.

Method of assessment

In all plants it may be appropriate to assess this unit concurrently with relevant teamwork and communication units.

Guidance information for assessment

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

Required Skills and Knowledge

This describes the essential skills and knowledge and their level, required for this unit.

Required skills

Competence includes the ability to:

determine the boundaries of the system to be studied

collect the required plant data from measurements, readings or calculated quantities

calculate the mass transfer loads

report the results.

Competence also includes the ability, for the practical completion of the job, to apply and/or explain:

changes in density with temperature (and pressure where appropriate)

stoichiometry of chemical reactions

mass balances.

Required knowledge

Knowledge and understanding of mass transfer principles and calculations sufficient to determine the mass transfer loads of an existing or a new process.

Range Statement

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. Add any 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.

Codes of practice/ standards

Where reference is made to industry codes of practice, and/or Australian/international standards, the latest version must be used.

Context

This competency unit includes the mass transfer into and out of all processing equipment and requires the quantitative determination of mass transfer loads. This competency applies to all sectors within the chemical, hydrocarbons and oil refining industry.

Mass transfer modes include:

simple (physical) mixing

simple (physical) separation

changes in component mass flow rates due to chemical reaction (including mixing and separation using chemical reaction).

Health, safety and environment (HSE)

All operations to which this unit applies are subject to stringent health, safety and environment 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.