2001
H I G H E R S C H O O L C E R T I F I C AT E
E X A M I N AT I O N
Construction
Total marks ?80
Section I Pages 2?
General Instructions 15 marks
?Reading time ?5 minutes ?Attempt Questions 1?5
?Working time ?2 hours ?Allow about 15 minutes for this section
?Write using black or blue pen
Section II Pages 9?6
?Board-approved calculators may
35 marks
be used
?Attempt Questions 16?5
?Write your Centre Number and
Student Number at the top of ?Allow about 45 minutes for this section
pages 9, 11, 15 and 25
Section III Pages 17?6
30 marks
?Attempt TWO questions from Questions 26?8
?Allow about 1 hour for this section
333
Section I
15 marks
Attempt Questions 1?5
Allow about 15 minutes for this section
Use the multiple-choice answer sheet.
Select the alternative A, B, C or D that best answers the question. Fill in the response oval
completely.
2+4=
Sample: (A) 2 (B) 6 (C) 8 (D) 9
A B C D
If you think you have made a mistake, put a cross through the incorrect answer and fill in the
new answer.
A B C D
If you change your mind and have crossed out what you consider to be the correct answer, then
indicate the correct answer by writing the word correct and drawing an arrow as follows.
correct
A B C D
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1 Which of the following is NOT usual practice on a construction site at the completion of
a day's activities?
(A) Lock up sheds and site, clear site of debris.
(B) Roll up all power leads, turn off power and water.
(C) Return unwanted material to supplier, clean all power tools.
(D) Clean tools and equipment, put barricades in place where necessary.
2 What does the abbreviation AS that appears on plans, specifications and products stand
for?
(A) Australian Systems
(B) Australian Standard
(C) Australian Services
(D) Australian Specifications
3 What would be an appropriate scale for a site plan of a cottage on a suburban block?
(A) 1 : 50
(B) 1 : 500
(C) 1 : 1000
(D) 1 : 2000
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4 Which of the levelling devices is the most accurate for the transfer of level over
15 metres?
(A)
(B)
(C)
(D)
Existing peg
Diagrams not to scale
5 A slump test may be required on a concrete mix. Which of the following does a slump
test measure?
(A) Concrete strength
(B) Water璫ement ratio
(C) Weight of wet concrete
(D) Workability of the mix
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6 What is the most appropriate method of determining whether a power tool is safe for use?
(A) Check the tagging.
(B) Check with the foreman.
(C) Check the power tool logbook.
(D) Check the manufacturer's compliance plate.
Which would be the correct order if 5 lengths of 75 ?50 ?3100 general construction pine
7
are needed?
(A) 75 ?50 F5 PINE 5/3.3
75 ?50
(B) F8 PINE 5/3.1
50 ?75
(C) F5 PINE 5/3.3
(D) 50 ?75 F8 PINE 5/3.1
8 What would the following symbol on a drawing indicate?
A
(A) North
(B) Reduced level
(C) Sectional plane
(D) Water flow direction
9 Which tool is best suited for squaring a trench in undisturbed ground?
(A) Bar
(B) Mattock
(C) Pick
(D) Square-mouth shovel
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10 At a building site, excavation is in progress. Jackhammers, rock breakers and dump
trucks are in constant use.
Which of the following site signage would be used?
(1) (2) (3)
(4) (5) (6)
(A) 1, 2, 4, 5
(B) 1, 3, 4, 6
(C) 2, 3, 5, 6
(D) 2, 4, 5, 6
11 Which of the following would NOT usually be found in a switchboard box on a builder's
temporary power pole?
(A) Earth leakage device
(B) GPO
(C) Main switch
(D) Surge protector
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12 When a work area on a concrete surface is being cleaned, which of the following is the
most suitable way of suppressing dust?
(A) Air the area thoroughly.
(B) Apply a light spray of water.
(C) Hose the surface thoroughly.
(D) Use an industrial vacuum cleaner.
13 On large construction sites, who is responsible for providing the tradesperson with
personal protective equipment (PPE)?
(A) Employer
(B) Supervisor
(C) Union representative
(D) WorkCover representative
14 What units are used to measure the capacity of portable electric generators?
(A) Amps (A)
(B) Kilonewtons (kN)
(C) Kilovolt-amps (kVA)
(D) Volts (V)
15 How much concrete would need to be ordered for a concrete path 41 metres long with a
width of 900 millimetres and thickness of 100 millimetres, allowing an extra 7.5% for
wastage?
(A) 3.4 m3
3.7 m3
(B)
3.8 m3
(C)
(D) 4.0 m3
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BLANK PAGE
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?Board of Studies NSW 2001
2001 HIGHER SCHOOL CERTIFIC ATE EXAMINATION
Construction Centre Number
Section II
Student Number
35 marks
Attempt Questions 16?5
Allow about 45 minutes for this section
Answer the questions in the spaces provided.
Marks
Question 16 (2 marks)
Symbols and abbreviations appear on plan and elevation drawings. Complete the table 2
by writing the meaning of each symbol.
Symbol Meaning
Question 17 (3 marks)
Give ONE major advantage for each of the following methods of communication used 3
on a building site.
Signage ...................................................................................................................
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Site Meeting ...................................................................................................................
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Drawing ...................................................................................................................
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334
Marks
Question 18 (2 marks)
Complete the diagram by labelling the parts shown by the arrows. 2
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Question 19 (3 marks)
List THREE factors that can affect the accuracy of a water level. 3
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?Board of Studies NSW 2001
2001 HIGHER SCHOOL CERTIFIC ATE EXAMINATION
Construction Centre Number
Section II (continued)
Student Number
Marks
Question 20 (2 marks)
List TWO types of portable fire extinguisher and the type of fire each is used to 2
extinguish.
Extinguisher Type of fire
Question 21 (2 marks)
Describe how to manually lift a load safely. 2
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335
Marks
Question 22 (7 marks)
The diagram indicates contours and an excavation for a concrete slab on a building
site.
61
58 60
59 B
57
56
55
A
SCALE 1 : 100
(a) Estimate the fall between B and A. 1
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(b) Calculate the area of the slab shown. 2
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Question 22 continues on page 13
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Marks
Question 22 (continued)
(c) If the excavation is from contour 57, calculate the approximate volume of the 4
excavated material. Show all working.
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End of Question 22
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BLANK PAGE
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?Board of Studies NSW 2001
2001 HIGHER SCHOOL CERTIFIC ATE EXAMINATION
Construction Centre Number
Section II (continued)
Student Number
Marks
Question 23 (4 marks)
A builder is to remove an amount of less than 200 m2 of existing asbestos cement
(A/C) sheeting.
(a) What items of personal protective equipment (PPE) would be required? 2
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(b) How should the demolished A/C sheeting be prepared for removal from site? 2
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Question 24 (4 marks)
The offsite sector of the construction industry has an increasingly important role 4
within the industry. Using TWO examples, explain why this is the case.
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336
Marks
Question 25 (6 marks)
(a) Name the parts of the air-compressor shown in the diagram. 3
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(b) How is the capacity of an air-compressor expressed? 1
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(c) Explain why there has been a recent increase in the use of air-compressors on 2
building sites.
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?16 ?br>
?Board of Studies NSW 2001
2001 HIGHER SCHOOL CERTIFIC ATE EXAMINATION
Construction
Section III
30 marks
Attempt TWO questions from Questions 26?8
Allow about 1 hour for this section
Answer each question in a SEPARATE writing booklet. Extra writing booklets are available.
In your answers you will be assessed on how well you:
demonstrate relevant knowledge and understanding
communicate ideas and information, using precise industry terminology and
appropriate workplace examples
organise information in a well-reasoned and cohesive response
solve proposed issues or problems
Question 26 (15 marks)
An electric brick-masonry saw (with water dust suppression) is to be used on a large
construction site. The operator should have received three levels of occupational health and
safety (OH&S) training:
?General OH&S induction training;
?Site induction OH&S training; and
?Work activity OH&S training.
Explain OH&S aspects within each level of training that should have prepared the
construction worker to safely operate this potentially dangerous machine.
Please turn over
?17 ?br>
337
In your answers you will be assessed on how well you:
demonstrate relevant knowledge and understanding
communicate ideas and information, using precise industry terminology and
appropriate workplace examples
organise information in a well-reasoned and cohesive response
solve proposed issues or problems
Question 27 (15 marks)
Scenario:
You are presented with a situation where a co-worker has collapsed while
working with hydrochloric acid, resulting in spillage of acid concentrate.
Use the MSDS for hydrochloric acid (on page 19) and the scenario provided, to answer the
following question:
Propose and justify an appropriate response, indicating the correct sequence for the procedures.
Your answer should include both immediate and long-term actions.
Question 27 continues on page 19
?18 ?br>
Question 27 (continued)
HYDROCHLORIC ACID
HAZARDOUS ACCORDING TO WORKSAFE CRITERIA
ChemWatch 1789 Company contact No. (1800) 093 333
INGREDIENTS (CHEMICAL ENTITY) CAS No % TWA
hydrochloric acid 7647-01-0 100 1 ppm
UN Number: 1789 Hazchem Code: 2R PRECAUTIONS FOR USE
D. Goods Class: 8 Subsidiary Risk: None Glasses:
Poisons Schedule No: S6 (S3NZ) Safety glasses.
Chemical goggles.
Full face-shield.
PROPERTIES
Gloves:
Liquid
1.BUTYL 2.BUTYL/NEOPRENE 3.PVC
Mixes with water
Corrosive Respirator:
Acid Type B-P Filter of sufficient capacity
Toxic or noxious vapours/gas
Flammability:
Does not burn.
HEALTH HAZARD INFORMATION
Acute Health Effects: SAFE HANDLING INFORMATION
Harmful if swallowed.
Storage & Transport:
Toxic by inhalation.
Keep locked up.
Causes severe burns.
Keep container tightly closed.
Skin contact may produce health damage.
Keep container in a well-ventilated place.
Eye contact may produce serious damage.
Keep away from food, drink and animal
Chronic Health Effects: feeding stuffs.
Exposure may produce irreversible effects. Store in cool, dry, protected area.
Restrictions on Storage apply. Refer to
Full Report.
FIRST AID
Spills & Disposal:
Swallowed:
Spilled liquid has low temperature and
Contact doctor or Poisons Centre.
evaporates quickly.
Give glass of water.
Control vapour with water spray/fog.
Rinse mouth with plenty of water.
Absorb with dry agent.
Eye: Dilute with water.
Wash with running water (15 mins) Neutralise with soda ash/lime.
Medical attention. Stop leak if safe to do so.
Take off all contaminated clothing
Skin:
immediately.
Flood body with water. Remove
This material and its container must be
contaminated clothing. Wash with water &
disposed of in a safe way.
soap. MEDICAL ATTENTION.
To clean the floor and all objects
Inhaled: contaminated by this material, use water.
Fresh air. Rest, keep warm. If breathing
Fire/Explosion Hazard:
shallow, give oxygen. Medical attention.
Vapours/gas heavier than air.
Toxic smoke/fumes in a fire.
ADVICE TO DOCTOR Attacks metals to liberate hydrogen.
Airway problems ?100% O2. Treat burns as Fire fighting:
thermal. Retract eyelids ?irrigate 30 mins. Keep surrounding area cool.
Water spray/fog.
End of Question 27
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BLANK PAGE
?20 ?br>
In your answers you will be assessed on how well you:
demonstrate relevant knowledge and understanding
communicate ideas and information, using precise industry terminology and
appropriate workplace examples
organise information in a well-reasoned and cohesive response
solve proposed issues or problems
Question 28 (15 marks)
Accurate costing of materials and projects is an important process within the construction
industry. Construction workers need to obtain information from many sources to perform this
task.
Detach pages 25 and 26. Complete the table on page 26 using the drawing specifications on
page 22 and the data sheet on page 23. The top row of the table has been completed as an
example.
After completing the table, answer the following in your writing booklet for Question 28:
For each material on which you have provided information, explain why the material's physical
characteristics make it suitable for its intended application in the suspended concrete path.
Question 28 continues on page 22
?21 ?br>
Question 28 (continued)
Existing building
Proposed
path
7500
A A
100
100
2000
TOP VIEW
2000
100 100
F 82 fabric
Non-slip finish
100 ?100
concrete upturn
placed in situ
Approved DPC and slip joint material
Average height 1000
Continuous
brick wall to be
two skins thick
Footing to have
100 mm cover
Ground line
Reinforced concrete 25 MPa
footing (40 mm cover
to reinforcing)
N.T.S
Foundation material ?silt clay
SECTIONAL VIEW A瑼
Question 28 continues on page 23
?22 ?br>
Question 28 (continued)
SQUARE RIBMESH: Sheets 6.0 ?2.4 m Nominal
Approx.
Cross
PRICE ($) Long
mass
wire
wire
Metro Regional
Per m2
Per m2 (kg)
Per unit (mm)
REF NO. (mm)
Per unit
14.44
207.90 7.60 @ 100
14.02 7.60 @ 100
RF 81 201.95 105
11.34
163.30 9.50 @ 200
11.01 9.50 @ 200
RF 102 158.50 80
8.86
127.65 8.55 @ 200
8.60 8.55 @ 200
RF 92 123.90 65
6.94
99.90 7.60 @ 200
6.73 7.60 @ 200
RF 82 96.95 52
5.47
78.75 6.75 @ 200
5.30 6.75 @ 200
RF 72 76.35 40
4.38
63.05 6.00 @ 200
4.25 6.00 @ 200
RF 62 61.20 33
3.07
44.20 4.75 @ 200
2.98 4.75 @ 200
RF 52 42.85 21
2.43
35.80 4.00 @ 200
2.36 4.00 @ 200
RF 42 33.95 15
4.96 4.00 @ 100
4.82 4.00 @ 100
RF 41 29
71.40
69.35
?Full strength fabric laps 400 mm
?Cut and bent Ribmesh will incur an additional surcharge.
SITE CLASSIFICATION
Foundation Description
Class
Most sand and rock sites Stable
A
Most silt and some clay Stable
S
Moderately reactive clay Reactive
M
Highly reactive clay Reactive
H
Extremely reactive clay Reactive
E
FOOTING SCHEDULE
Wall type Site class Strip footing Pad footing Reinforcement
Depth Width Depth Width
A 150 300 175 300 3 ?8 TM
110 brick wall
S 200 300 225 300 3 ?8 TM
M 230 350 275 400 3 ?11 TM
H 270 375 270 420 3 ?11 TM
E 300 400 350 420 3 ?11 TM
A 200 300 225 325 3 ?8 TM
230 brick wall
S 250 350 275 375 3 ?8 TM
M 275 375 300 400 3 ?11 TM
H 400 400 425 425 3 ?11 TM
E 425 400 450 450 3 ?12 TM
A 200 375 225 400 3 ?8 TM
350 brick wall
S 250 400 275 425 3 ?8 TM
M 275 425 300 450 3 ?11 TM
H 300 450 350 475 3 ?12 TM
E 300 500 400 550 3 ?12 TM
Note: Concrete cost allowance $136/m3.
For 110 wall allow 50 bricks per square metre. Brick cost allowance
For 230 wall allow 100 bricks per square metre. $550/1000
For 350 wall allow 150 bricks per square metre.
End of paper
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BLANK PAGE
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?Board of Studies NSW 2001
2001 HIGHER SCHOOL CERTIFIC ATE EXAMINATION
Construction Centre Number
Student Number
This page is to be detached, completed and attached to the inside front cover of your writing
booklet for Question 28.
Please turn over
?25 ?br>
338
Question 28
PROJECT: Suspended Concrete Path CLIENT: Mr P J Smith
LOCATION: Pitt St, Sydney NSW
Material Description Functional characteristic Working Required Cost per Cost
in the structure (indicate unit
units)
Key footing to common
Concrete in 0.636 m3 $136/m3 $86.52
0.3 m ?9 m ?0.152 ?9
25 MPa foundation material
piers
Concrete in
footings
?26 ?br>
Brickwork
?Board of Studies NSW 2001
Reinforcing
in suspended
concrete slab
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