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NST2602 EXAM PACK 2024
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- University Of South Africa (Unisa)
NST2602 Latest exam pack questions and answers, perfect for 2024 exam preparation
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NST2602EXAM PACK
Solutions, Explanations, workings, and references
+27 81 278 3372
,UNIVERSITY EXAMINATIONS
October/November 2020
NST2602
NATURAL SCIENCE AND TECHNOLOGY FOR CLASSROOM 4
100 Marks
Duration 2 Hours
This paper consists of 4 pages.
Instructions:
Make sure you read the online Honesty Declaration.
Closed book examination.
You have 2 Hours to complete this examination paper (use the time allocated optimally)
ANSWER ALL 5 QUESTIONS
Online Examination Assessment Rules
INSTRUCTIONS:
1. All questions are compulsory.
2. Calculators may be used.
3. Answers can be typed (use Arial, font size 12, spacing 1,5) or hand written
4. All subsections of a particular question should not be separated from the question; for
example, if you decide to start with question 1 make sure that all the subsections in
question 1 are completed under question 1, not under any other than in question 1.
[TURN OVER]
, 2 NST2602
October/November 2020
QUESTION 1
1.1 Differentiate between the concepts civil technology and engineering
graphics and design. (4)
1.2 Discuss the concepts technology and technology education in your
context, indicating the role they play in your society. (4)
1.3 Explain the relationship between conceptual and procedural knowledge
in technology education. (5)
1.4 Briefly discuss any THREE characteristics of indigenous knowledge and
the role it plays in technology education. (7)
[20]
QUESTION 2
2.1 In Civil Technology, geometrical construction provides the basic principles
of engineering drawing. Briefly discuss the basic procedures that you
think should be followed towards the construction of an arc. (6)
2.2 Hydraulic accumulators and bottle jacks play a very important role in systems
and control.
a) Identify the circumstances in which hydraulic accumulators and
bottle jacks can be used. (8)
b) Explain with practical examples the nature of the application of
hydraulic accumulators and jacks in your context. (6)
[20]
QUESTION 3
3.1 Study the table below and answer the questions that follow.
1st 2nd 3rd 4th band
Colour band band band (zeros) resistance
tolerance
Black 0 0 Silver 10%
Brown 1 1 0 Gold 5%
[TURN OVER]
, 3 NST2602
October/November 2020
Red 2 2 0 0 *no band 20%
Orange 3 3 0 0 0
Yellow 4 4 0 0 0 0
Green 5 5 0 0 0 0 0
Blue 6 6 0 0 0 0 0 0
Violet 7 7 0 0 0 0 0 0 0
Grey 8 8 0 0 0 0 0 0 0 0
White 9 9 0 0 0 0 0 0 0 0 0
a) State what the table represents. (3)
b) Explain to a friend, in not less than five points, what each section of the
table stands for. (5)
c) In relation to the table, calculate the resistance value if you are given a
colour coded resistor, Green Black Yellow Gold. (6)
3.2 Draw a simple diagram that consists of an emitter NPN transistor amplifier
circuit and explain its operation. (6)
[20]
QUESTION 4
The use of tools in technology is part of a corner stone of design and making
Projects:
a) State the function of a feeler gauge. (2)
b) Differentiate between a vice grip and a wrench in terms of their structure
and functions. (3)
c) Give reasons why you think some technicians prefer to use Allen keys
instead of self-tapping screws to fasten joints. (4)
d) Explain how you would use micrometre to determine the depth or the size
of an object. (3)
e) Describe the contributing factor(s) towards the preference of a Vernier
calliper than any other measuring instruments. (3)
[TURN OVER]
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