1. Educator and Tagging Information
Learning Area:
Technology
Resource Name:
Technology
Assessment Exemplar Number:
TECHN7.73
Item/s:
1
Phase:
Senior Phase
Grade:
7
Tags:
Technology, processing, waterproof, information, case study, worksheet, Formative Assessment
Assessment Type:
Formative
Assessment Form/s:
Case study, Worksheet
Copyright for included material:
N/A
Duration:
60 min
Learning Outcome(s) and Assessment Standard(s):
Learning Outcome 2: Technological Knowledge and Understanding
The learner will be able to understand and apply relevant technological knowledge ethically and
responsibly.
Assessment Standards
We know this when the learner
2 Processing
2.1 Demonstrate knowledge and understanding of how materials can be processed to change or
improve properties (e.g. strength, fire resistance, waterproofing, taste, volume, texture).
Learning Space:
Assessment
Hyperlinks:
To be completed later.
Rating:
Number of questions for exemplar:
7
Easy questions:
Medium questions:
Difficult questions:
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7

2. Assessment Task
Waterproofing materials – reading for information
The following information has been summarised from a website,
http://www.waterproofingafrica.com/applications.html. Read the information and then answer the
questions that follow.
System required Designed product Method
Concrete roofs 4mm torch-on / heat
welding
Include welding to roof and
vertical wall; saturate with
silver UV protection agent
IBR / Corrugated roof Polyester /Glass fibre
membrane applied to bolt
heads, lap and butt joints
Coat surface with either
bitumen or acrylic bonding
liquid
Expansion joints PU foam and polyurethane
system
Smooth on polyurethane
Patios and balconies Cementitious latex-based
system
Apply cementitious
substance and overlay area
with microfibre material
Showers and bathrooms Cementitious latex-based
system
Apply cementitious
substance and overlay area
with microfibre material
Re-apply cementitious to
polyfelt microfibre
1. Why do you think that concrete flat roofs very often leak? [2 marks]
2. What do you understand by heat welding? [2 marks]
3. What is a UV protection agent? Why is it so important in Africa? [4 marks]
4. What is polyurethane made from? [2 marks]
5. Why do expansion joints need to be waterproofed? [2 marks]
6. What is latex? Why has this substance been used? [4 marks]
7. Why do you think the solution for waterproofing showers and bathrooms is a good one?
[4 marks]
[20 marks]
Suggested Solutions
Question
number
Possible
mark
Answers
1 2 marks Water can collect and does not drain well.
2 2 marks Using heat to weld (join) two substances together.
3
4 marks UV protection agent protects against damaging UV rays of the sun. Important as
African sun is hot, with UV rays.
4 2 marks Plastic
5 2 marks When they expand, water could get through.
6 4 marks Rubber. Waterproof.
7 4 marks Because latex is used plus microfibre and re-applied again.
[20 marks]
Appendix of Assessment Tools