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SOUTH AFRICAN QUALIFICATIONS AUTHORITY

REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE:

Demonstrate knowledge of the characteristics of water flow

SAQA US ID	UNIT STANDARD TITLE
14023	Demonstrate knowledge of the characteristics of water flow
ORIGINATOR
SGB Water Sector
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-
FIELD			SUBFIELD
Field 12 - Physical Planning and Construction			Civil Engineering Construction
ABET BAND	UNIT STANDARD TYPE	PRE-2009 NQF LEVEL	NQF LEVEL	CREDITS
Undefined	Regular	Level 4	NQF Level 04	10
REGISTRATION STATUS		REGISTRATION START DATE	REGISTRATION END DATE	SAQA DECISION NUMBER
Passed the End Date - Status was "Reregistered"		2005-02-09	2008-02-09	SAQA 1058/05
LAST DATE FOR ENROLMENT		LAST DATE FOR ACHIEVEMENT
2009-02-09		2012-02-09

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 is replaced by:

US ID	Unit Standard Title	Pre-2009 NQF Level	NQF Level	Credits	Replacement Status
254121	Demonstrate knowledge of the characteristics of water flow	Level 4	NQF Level 04	10

PURPOSE OF THE UNIT STANDARD

The qualifying learner achieving this unit standard in combination with context expertise standard(s) will be able to explain the flow characteristics of water in a water reticulation system. This competency will enable the learner to describe negative influences affecting water flow in pipelines, explain pressure and flow measuring devices and calculate water flows accurately. This competence will equip the learner with knowledge that contributes to the learner's personal development, which will enhance employability of the qualifying learner in both the water sector and other related jobs.

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING

Mathematics NQF level 3

UNIT STANDARD RANGE

Characteristics of water flow Volume, pressure/vacuum, flow rate, gravity/head.

Measuring devices Water meters (standard), magnetic flow meters, ultra-sonic flow meters, pitot tubes, rotameters, positive displacement pumps, and pressure gauges.

Specific Outcomes and Assessment Criteria:

SPECIFIC OUTCOME 1

Explain the characteristics of water flow.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. Volume in a water reticulation system is explained and the units of measurement are described.

ASSESSMENT CRITERION 2

2. Flow rate, velocity and cross-sectional area in a water reticulation system are explained and the units of measurement are described.

ASSESSMENT CRITERION 3

3. Pressure/vacuum in a water reticulation system is explained and the units of measurement are described.

ASSESSMENT CRITERION 4

4. Gravity/head in a water reticulation system is explained and the units of measurement are described.

SPECIFIC OUTCOME 2

Describe negative influences affecting water flow in pipelines.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. Airlock in a water reticulation system is described and its causes, effects and remedies are explained.

ASSESSMENT CRITERION 2

2. Cavitation in a water reticulation system is described and its causes, effects and remedies are explained.

ASSESSMENT CRITERION 3

3. Water hammer in a water reticulation system is described and its causes, effects and remedies are explained.

SPECIFIC OUTCOME 3

Explain flow characteristics in the design of a water reticulation system.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The application of water flow characteristics in a water reticulation system design is explained.

ASSESSMENT CRITERION 2

2. Design features to prevent negative influences occurring in a water reticulation system are described and explained.

SPECIFIC OUTCOME 4

Explain flow and pressure measuring devices and calculate water flows.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. Flow and pressure measuring devices are identified and described.

ASSESSMENT CRITERION 2

2. Open channel flow measurement systems are described.

ASSESSMENT CRITERION 3

3. Flow and pressure measuring devices are read and recorded accurately.

ASSESSMENT CRITERION 4

4. Water flows are accurately calculated.

ASSESSMENT CRITERION 5

5. Problems are identified and appropriate solutions are explained.

UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS

1. Anyone assessing a learner or moderating the assessment of a learner against this unit standard must be registered as an assessor with the relevant ETQA.
2. Any institution offering learning that will enable the achievement of this unit standard must be accredited as a provider with the relevant ETQA.
3. Assessment and moderation of assessment will be overseen by the relevant ETQA according to the ETQA policies and guidelines for assessment and moderation.
4. Moderation must include both internal and external moderation of assessments at exit points of the qualification, unless ETQA policies specify otherwise. Moderation should also encompass achievement of the competence described both in individual unit standards as well as the integrated competence described in the qualification.

UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE

Learners should have a knowledge and understanding of:
1. The importance of accurate calculations.
2. The balancing of pressure and volume.
3. The purpose of balancing water flow.
4. Break pressure tanks.
5. Contour plans.
6. Physical properties of water.
7. The principles of buoyancy.
8. Flow rates (steady and unsteady).
9. Inertia.
10. Principles of energy.

Critical Cross-field Outcomes (CCFO):

UNIT STANDARD CCFO IDENTIFYING

Identify and solve problems in which responses display that responsible decisions using critical and creative thinking have been made. This is related to:

Airlock in a water reticulation system is described and its causes, effects and remedies are explained.
Cavitation in a water reticulation system is described and its causes, effects and remedies are explained.
Water hammer in a water reticulation system is described and its causes, effects and remedies are explained.
Design features to prevent negative influences occurring in a water reticulation system are described and explained.

UNIT STANDARD CCFO WORKING

Work effectively with others as a member of a team, group, organisation, and community.

UNIT STANDARD CCFO ORGANISING

Plan, organise and manage oneself and one's activities responsibly and effectively.

UNIT STANDARD CCFO COLLECTING

Collect, analyse, organise and critically evaluate information. This relates to:

Airlock in a water reticulation system is described and its causes, effects and remedies are explained.
Cavitation in a water reticulation system is described and its causes, effects and remedies are explained.
Water hammer in a water reticulation system is described and its causes, effects and remedies are explained.
Design features to prevent negative influences occurring in a water reticulation system are described and explained.

UNIT STANDARD CCFO COMMUNICATING

Communicate effectively using visual, mathematical and/or language skills in the form of oral and/or written presentation. This relates to all assessment criteria.

UNIT STANDARD CCFO SCIENCE

Use science and technology effectively and critically, showing responsibility towards the environment and health of others. This relates to:

Flow and pressure measuring devices are identified and described.
Open channel flow measurement systems are described.
Flow and pressure measuring devices are read and recorded accurately.
Water flows are accurately calculated.

UNIT STANDARD CCFO DEMONSTRATING

Demonstrate an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation.

The application of water flow characteristics in a water reticulation system design is explained.
Design features to prevent negative influences occurring in a water reticulation system are described and explained.

UNIT STANDARD NOTES

This unit standard has been replaced by unit standard 254121, which is "Demonstrate knowledge of the characteristics of water flow", Level 4, 10 credits.

INTEGRATED ASSESSMENT
When conducting assessments, assessors must ensure that they are familiar with the full text of the unit standards being assessed. Assessors must ensure that the assessment covers the specific outcomes, critical cross-field outcomes and essential embedded knowledge by developing assessment activities and tools, which are appropriate to the contexts in which the learners are working. These activities and tools may include self-assessment, peer assessment, formative and summative assessment. It may be more effective and efficient to assess a number of unit standards together in an integrated way, thus reducing the overall number of assessments and ensuring that commonalities that exist between a number of unit standards are captured in a way that makes sense for assessment.

ASSESSMENT OPTION
Learners could be assessed using the following methods:
Oral or written questions
Simulation or observation
Product sample calculations

QUALIFICATIONS UTILISING THIS UNIT STANDARD:

	ID	QUALIFICATION TITLE	PRE-2009 NQF LEVEL	NQF LEVEL	STATUS	END DATE	PRIMARY OR DELEGATED QA FUNCTIONARY
Core	23476	National Certificate: Supervision of Water Reticulation Operations	Level 4	NQF Level 04	Passed the End Date - Status was "Reregistered"	2008-02-09	Was EWSETA until Last Date for Achievement

PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD:

This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.

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