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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Determine low velocity and volume flow rate of air in a working place by means of the smoke method 
SAQA US ID UNIT STANDARD TITLE
421858  Determine low velocity and volume flow rate of air in a working place by means of the smoke method 
ORIGINATOR
QCTO Task Team - Mining and Minerals 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Fabrication and Extraction 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Not Applicable  NQF Level 02  2 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
This unit standard will be useful to people who have responsibility to determine low air velocities and volume flow rates of air in a working place to ascertain whether conditions are within the prescribed limits and take appropriate action.

Learners credited with this unit standard are able to:
  • Describe the specified requirements pertaining to determining the velocity and volume flow rate of air by means of the smoke method.
  • Prepare to determine air velocity.
  • Determine and record air velocity, calculate the volume flow rate of air and take appropriate action.
  • Perform post measurement activities. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    It is assumed that learners are already competent in:
  • Communication and mathematical literacy at NQF Level 1. 
    		•

    UNIT STANDARD RANGE 
    N/A 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Describe the specified requirements pertaining to determining the velocity and volume flow rate of air by means of the smoke method. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The limits for velocities and volume flow rates in the working place are explained to ensure a healthy, safe and productive environment. 

    ASSESSMENT CRITERION 2 
    The reasons for ventilating working places are discussed and explained in terms of specified requirements. 

    ASSESSMENT CRITERION 3 
    The principle of measuring velocities and volume flow rates, and the range and limitations, are explained to enhance a healthy, safe and productive environment. 

    ASSESSMENT CRITERION 4 
    The difference between velocity and volume flow rate of air are explained. 

    SPECIFIC OUTCOME 2 
    Prepare to determine air velocity. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The measuring equipment is examined and defects found are dealt with in accordance with specified requirements. 

    ASSESSMENT CRITERION 2 
    The importance of examining the measuring equipment and dealing with defects is explained in terms of the consequences to occupational health and safety. 

    ASSESSMENT CRITERION 3 
    The dangers of entering a working place without obtaining permission are explained in terms of the consequences to occupational health and safety. 

    ASSESSMENT CRITERION 4 
    The position where measurements are to be taken is selected, examined and hazards and risks pertaining to occupational health and safety are dealt with. 

    SPECIFIC OUTCOME 3 
    Determine and record air velocity, calculate the volume flow rate of air and take appropriate action. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The air velocity is determined and recorded and the importance of determining the air velocity as prescribed is explained in terms of the consequences to occupational health and safety. 

    ASSESSMENT CRITERION 2 
    The cross sectional area is determined and recorded and the importance thereof explained. 

    ASSESSMENT CRITERION 3 
    The volume flow rate of air is calculated and recorded in accordance with specified requirements. 

    ASSESSMENT CRITERION 4 
    The results are evaluated and appropriate action is taken, when applicable, to prevent unfavourable consequences to health and safety. 

    SPECIFIC OUTCOME 4 
    Perform post measurement activities. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The equipment is cleaned and defective equipment is dealt with in accordance with specified requirements. 

    ASSESSMENT CRITERION 2 
    Reports are compiled in the required format, and submitted to designated personnel in accordance with legal and site-specific requirements. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant QCTO Quality Assurance Partner (QAP).
  • Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant QCTO QAP.
  • Moderation of assessment will be overseen by the relevant QAP according to the moderation guidelines and the agreed QAP procedures. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    The following embedded knowledge is addressed in an integrated way in the unit standard:
  • The limits for velocities and volume flow rates.
  • The reasons for ventilating working places.
  • The principle of measuring velocities.
  • The difference between velocity and volume flow rate.
  • Using and caring for measuring equipment.
  • Evaluation of results. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a team/group/organisation/community.
    Note:
  • The ability and willingness of the learner to work effectively when determining low velocity and volume flow rate of air by means of the smoke method. 
    		•

    UNIT STANDARD CCFO COLLECTING 
    Collect, organise and evaluate information.
    Note:
  • The ability of the lea