NZQA Expiring unit standard
19526 version 5
Page 1 of 4
Title
Explain the application of engineering principles in the dairy industry
Level
3
Credits
4
Purpose
People credited with this unit standard are able to: identify the
application of metric units of measurement used in dairy
engineering, identify properties of solids, liquids and gases;
explain the operation of product pumping systems used in the
dairy industry; and explain underlying principles of engineering
applicable to dairy processing unit operations.
Classification
Dairy Manufacturing > Dairy Technology
Available grade
Achieved
Explanatory notes
Metric units of measurement refers to the metre-kilogram-second (mks) branch of the
International System of Units (SI).
Outcomes and evidence requirements
Outcome 1
Identify the application of metric units of measurement used in dairy engineering.
Evidence requirements
1.1
Metric prefixes are identified in terms of prefix, symbol, and decimal or scientific
notation.
Range
1.2
nano, micro, milli, centi, kilo, mega, giga.
Units of measurement are identified in terms of the SI measurement system and
relationships between base and derived units.
Range
time, length, mass, area, volume, density, force, pressure.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
19526 version 5
Page 2 of 4
Outcome 2
Identify properties of solids, liquids and gases.
Evidence requirements
2.1
Solids, liquids and gases are distinguished in terms of shape retention, fluidity
and compressibility.
2.2
Effects of absorbing or releasing heat energy are identified in terms of changes
in volume, temperature and state.
2.3
Properties of static and moving fluids are identified in terms of pressure
transmission and variation at depth, turbulent versus laminar flow, and viscosity.
Outcome 3
Explain the operation of product pumping systems used in the dairy industry.
Evidence requirements
3.1
The explanation establishes the role of pumps in overcoming resistance in
pumping systems.
Range
3.2
The explanation establishes the operating principles, performance
characteristics and typical applications of product pumps.
Range
3.3
centrifugal, positive displacement.
The explanation establishes methods of flow control of product pumps.
Range
3.4
static head, friction head, suction head, delivery head.
centrifugal, positive displacement.
The explanation identifies good operating practices and remedies for pumping
problems.
Range
cavitation, capacity, overloading, water-hammer.
Outcome 4
Explain underlying principles of engineering applicable to dairy processing unit operations.
Range
heating and cooling, separation, homogenisation, concentration.
Evidence requirements
4.1
The explanation identifies factors influencing the efficiency of heat transfer in
dairy processing, and advantages and disadvantages of direct versus indirect
methods of heat transfer.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
4.2
19526 version 5
Page 3 of 4
The explanation identifies the application of separation techniques used in dairy
processing in terms of particle size and particle characteristics.
Range
precipitation, conventional filtration, centrifugal separation,
membrane filtration.
4.3
The explanation identifies control of surface area to volume ratio as an
underlying principle of homogenisation, spray-drying and moisture expulsion
from cheese and casein curds.
4.4
The explanation establishes utilisation of the relationship between boiling point
and pressure for evaporation, heating and cooling.
Replacement information
This unit standard replaced unit standard 4824.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
26 August 2002
31 December 2017
Revision
2
13 June 2003
31 December 2017
Rollover
3
17 July 2009
31 December 2017
Review
4
15 October 2015
31 December 2017
Rollover
5
21 January 2016
31 December 2019
Consent and Moderation Requirements (CMR) reference
0022
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
19526 version 5
Page 4 of 4
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016