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Civil Technology 1 June 2015

MPUMALANGA PROVINCIAL GOVERNMENT

DEPARTMENT OF EDUCATION

MARKS: 150 TIME: 3 Hours

Consists of 10 pages and 2 answer sheets

CIVIL TECHNOLOGY

JUNE 2015

GRADE 11


INSTRUCTIONS AND INFORMATION 1. This question paper consists of THREE questions. 2. ALL questions are COMPULSORY. 3. Answer each question as a whole, do NOT separate sub questions. 4. Start each question on a NEW page. 5. Sketches may be used to illustrate your answers. 6. ALL calculations and written answers must be done in the answer

book. . 7. ALL the drawings are to be fully dimensioned and neatly finished off

with descriptive titles and notes to conform with the SANS/SABS Recommended Practice for Building Drawing.

8. For the purpose of this question paper, the size of a brick should be taken as 220 mm x 110 mm x 75 mm

9. Use your discretion where dimensions and/or details have been omitted.

10. Non-programmable pocket calculators may be used. 11. Answer Question 3.1 AND 3.3 on ANSWER SHEET 3.1 and 3.3

using drawing instruments.


QUESTION 1: CONSTRUCTION SAFETY AND MATERIALS 1.1 Building sites must be prepared and facilities been provided before any

construction work can start. 1.1.1 Name THREE factors that should be kept in mind to secure a building

site. (3) 1.1.2 Name FIVE important factors to consider when working on a ladder. (5)

1.2 Every year we experience accidents during excavation processes.

Name FOUR safety rules that should be considered while doing excavations. (4)

1.3 Fires are a great risk in all working places: Copy the table in your ANSWER BOOK and, Match the following Classes of fire with the Type and the Extinguisher which

can be used to extinguish the fire.

CLASSES TYPE OF FIRE EXTINGUISHER 1.3.1 Class A flammable liquids dry chemical or CO2 1.3.2 Class B electrical fires soda-acid or gas propelled water. 1.3.3 Class C wood, paper. foam,dry chemical or CO2

(6) 1.4 Concrete landscape blocks are commonly used in the building industry. 1.4.1 Name TWO properties of concrete. (2)

1.4.2 Explain TWO uses for concrete building blocks. (2) 1.4.3 What is the purpose of landscape blocks? (2) . 1.4.4 List TWO places where landscape blocks are mostly used. (2) 1.5 Steel is an all important material used in construction.

1.5.1 Describe FIVE properties of steel tubing. (5) 1.5.2 List FIVE uses of steel tubing. (5)

1.6 Explain one safety regulation that a person must take when working with the following tools. 1.6.1 Angle grinder 1.6.2 Portable electrical plane 1.6.3 Plastering trowel 1.6.4 Monkey wrench (4)


1.7 The following annotation appears on a reinforcement work plan, explain to your fellow workmen what is meant by 8R 20 05-300 (4) 8 = 02 = R = round mild steel 20 = 300= 1.8 FIGURE 1.8 shows a line diagram of a concrete beam. Complete the figure in

your ANSWERBOOK and: 1.8.1 Draw a longitudinal section through the beam to show all the

reinforcing in the beam. Show clearly the following: x Main bars x Anchor bars x Shear bar x Binders x Minimum concrete cover x All labels . (8)

FIGURE 1.8 1.9 The building regulations (SANS) stipulate guidelines of where and how DPC’s should be positioned. Write 1.9.1 - 1.9.5 in your ANSWER BOOK and list FIVE places where the builder can position the DPC ( 5) 1.10 FIGURE 1.10 shows the first layer of a corner junction (quoin) built in an

English bond. Draw in your answer book, the second layer (Consecutive layer). (5)

FIGURE 1.10


QUESTION 2 APPLIED MECHANICS 2.1 In order to comply with the SI units that are used, one needs to know both the

unit and its symbol. Write down number2.1.1- 2.1.4on your answer sheet and complete the missing part of the table

(4)

UNIT SYMBOL 2.1.1 Meter M Energy 2.1.2 J Weight Newton 2.1.3 Force 2.1.4 N

2.2 Graphically determine the size of the equilibrium force as indicated in the following space diagram. (Determine the unknown force P) (4)

FIGURE 2.2 2.3 FIGURE 2.3 shows a beam with THREE point loads........ 20N 40N 30N 5m 6m 3m 2m A B B C D L R

FIGUUR 2.3

2.3.1 What is the total length of the beam? (1) 2.3.2 Calculate the size of the force in L. (4) 2.3.3 Calculate the size of the force in R. (4) 2.3.4 Do a test to see if your answers at L and R are correct. (2)

S

50N nN

R

25N

60N

60°

60°

45°


. 2.4 Complete the following shear force calculations. Just write the missing answer next to the correct question number in your answer book: 2.4.1 SfB = (value L) – 20N = _ _ _ _ _ _ _ _ 2.4.2 SfC = value L) – 20N – _ _ _ _ _ _ _ _ = _ _ _ _ _ _ _ _ _ 2.4.3 SfD=(value L) – 20N – value at) – value =_ _ _ _

(4) 2.5 Complete the following bending moment calculations. Just write the missing value next to the correct question number in your answer book: 2.5.1 BmB = (value L x 5m) = _ _ _ _ _ _ _ _ _ _ 2.5.2 BmC = (value L x 11m) – (20N x 6m) = _ _ _ _ _ _ _ _ _ 2.5.3 BmD = (value L x 14m) – (20N x 9m) – (30N x 3m) = _ _ _ _ _ (3)

2.6 A simple supported beam with a span of 14 meters, loaded with one

point load and one uniformly distributed load (UDL), is shown FIGURE.2.6

FIGURE 2.6 2.6.1 Convert the UDL into a point load (2) 2.6.2 Calculate the values of the shear forces at A,B,C, and D. (4) 2.6.3 Draw a shear force diagram of the beam by using scale 1N = 1mm (4)

40N 5N/m

RR=35N RL=25N 2m

A B 2m

C D 4m


2.7 You are GIVEN two regular shapes, a triangle and a square. A B

40 40 30 60 2.7.1 Calculate the AREA of lamina A and B (4) 2.7.2 Determine by means of calculation the centroid of each lamina (8) 2.7.3 Draw figure A and B on your answer book and indicate by means of drawing

the position of a centroid in each figure. Scale1:1. (2)

[50]


A

QUESTION 3: In FIGURE 3 you are supplied with an incomplete floor plan of a new proposed outside dwelling showing the outlines of the walls and roof. The centre line of the interior walls is also shown. USE ANSWERSHEET 3.1 and: 3.1 Draw to a scale 1:50 the complete floor plan as indicated by outlines.(20) 3.2 Draw the view of the wall showing the windows on the points W1 and W2.

20)

FIGURE 3.1

A

W2 W1

D

Gable roof line Internal wall

Roofline


[40]

TOTAL: 150


QUESTION/ VRAAG 3 ANSWER SHEET/ ANTWOORD BLAD 3.1 and 3.2 NAME/NAAM_________________________________________ GRADE/GRAAD 11

N

N

(20)

A

A

W2 W1

D

Gable roof line Internal wall

Roofline


ANSWER SHEET/ ANTWOORD BLAD 3.2 NAME/NAAM________________________________________GRADE/GRAAD 11 (20) (40)

-1-

MPUMALANGA PROVINCIAL GOVERNMENT MPUMALANGA PROVINSIALE REGERING

DEPARTMENT OF EDUCATION/DEPARTEMENT VAN ONDERWYS

CONSIST OF 12 PAGES /BESTAAN UIT 12 BLADSYE MARKS/PUNTE: 150 TIME/TYD : 3 Hours

CIVIL TECHNOLOGY SIVIELE TEGNOLOGIE

MEMORANDUM JUNE 2015

GRADE 11 GRAAD 11

-2-

CONSTRUCTION SAFETY AND MATERIALS

QUESTION 1: 1.1.1 .

x Fenced off /Toegespan word9 x Notice boards displayed / Inligtings borde moet vertoon word.9 x Site must be safe for persons to work on /Terrein moet veilig wees.9 x Heavy vibration by machinery or vehicles nearby/ Vibrasie van masjiene

en voertuie Consider other correct answers Enige ander aan vaarbare korrekte antwoorde (3)

1.1.2 Name FIVE important factors to consider when working on a ladder.

.Only one person should work on a ladder at a time.Slegs een persoon moet op n leer wees. 9 . Ladders must be used on a stable and level surfaces unless secured to prevent accidental movement.Lere moet op stabiele harde oppervlaktes gebruik word. 9 . Whenever the ladder need the ladder need to tied to prevent it from slipping, this can be done at the top or at the bottom and do not use the rungs to tie the ladder. Waar moontlik moet lere vas gemaak word om te verhoed dat die leer gly.9 .Keep metal ladders away from overhanging cables. Metaal lere moet weggehou word van oorhoofse kabels 9 . Do not move , shift or extend ladders while in use. Moenie lere skuif of verleng wanneer dit gebruik word9 .Maintain ladders free of oil, grease and other slipping hazards. Onderhou lere vry van olies of enige ander gly bare vloeistowwe9 .Consider any other correct answer. Enige ander aan vaarbare korrekte antwoorde (5) 1.2 Every year we experience accidents during excavation processes. Name FOUR safety rules that should be considered while doing excavations. . The area under excavation must be fenced off and warning signs must be visible. Die gebied onder konstruksie moet afgekamp word en waarskuwings tekens aangebring word. 9

.Workers must wear hard hats and protective and reflective clothes. 9 Werkers moet harde hoede dra en veiligheids en reflekterende klere dra . Cover the area completely after working hours , particulary if there are children entering the site. 9 Die gebied totaal afgeskort word na ure. .The sides of trenches deeper than 1,5m should be protected or braced. 9 Die kante van uitgrawings moet versterk en beskut word. .Whilst the excavation is in process no tools or materials other than those in use are allowed inside the trench. Terwyl uitgrawings gedoen word moet slegs gereedskap wat gebruik word in sloot wees. .A responsible person should investigate the trenches for safety daily and especially after bad weather or rain. Die uitgrawings moet daagliks en na swaer reen geinspekteer word deur gekwalifiseerde persoon. .Consider other correct answers (4) 1.3 Fires are a great risk in all working places: each of the following types of fires and name at each which type of fire extinguisher should be used to kill the fire: Class A wood,paper

etc/hout,papie9 soda-acid or gas propelled water. 9 Soda suurof gas aangedrewe water(2)

Class D flammable liquids

foam, dry-chemical or carbon dioxide type of extinguisher9 Vlambare vloeistof (2)

Class C electrical fires Elektriese brande 9

Skuim of droe gemikaliee dry chemical or carbon dioxide type extinguishers Skuim of droe gemikaliee 9 (2)

1.4 . 1.4.1 . It can be cast into any mould design9 Kan in enige vorm gegiet word . It is water resistant Water bestand9 . It is durable Duursaam

It is easy and inexpensive to maintain /Maklik en goed koop om instand te hou

. Consider other correct answers 1.4.2 .Construction of cavity walls Konstruksie van spou mure9 .Construction of external and internal walls9 Konstruksie van binne en buite mure (2)

1.4.3 What is the purpose of landscape blocks? .Construction of waterways /Kanal te bou9 .Construction of flowerpots/ Blom bakke 9 .Construction of walls / mure9 (2) . .Consider any other correct answer. 1.4.4 Name TWO places where landscape blocks are mostly used .Alongside driveways/langs motor opritte9 .Alongside waterways /langs water wee9 .Consider any other correct answer. (2) 1.5 1.5.1

>Contains little carbon./baie min grafiet 9 >It is not as strong as solid steel profiles. /nie so sterk soos soliede profiele nie9 >It is malleable./maklik om mee te werk 9 > it rust easily./roes maklik 9 >It is easy to weld./sweis maklik9 >Can be galvanized to prevent rust or to be used in specific areas./kan gegalvaniseer word 9 >It is ductile/pliable / maklik om te smee en te vorm9. > Consider any other correct answer. (5) 1.5.2 >Used as pillars for balcony balustrades or lattice work./Gebruik vir pilare.balkonne 9 >Can be used as post for signage./Pale vir inligtings borde 9 >Can be used as fence posts./Heinings pale9 >Can be used for shelving./rakke 9 >Can be used for the construction of frames of security gates./rame vir sekuriteits hekke 9 > Can be used as palisade in fences. Palisades en heinings9 (5) >Consider any other relevant answer.

1.6 1.6.1 Angle grinder > Make sure that the blade has stopped moving before leaving the grinder

unattended Maak seker die lem het gestop voordat enige verstellings gedoen word9

> Use both hands to operate the machine. Gebruik altwee hande op masjien

> Remove the electric power plugs when adjustments are made. Verwyder die elektriese prop uit muur voordat verstellings gemaak word

> Wear a dust mask when cutting stone and/or concrete. Dra stofmaskers wanneer klip gesny word

> Make sure that the grinding wheel is free of cracks or chips. Sny wiel sonder enige happe of krake

> Consider other correct answer. (1) 1.6.2 Portable electrical plane > Remove electric power plug when adjusting the machine9.

Verwyder dieelektriese prop uit muur voordat verstellings gemaak word > Use both hands to operate the machine.

Gebruik altwee hande op masjie > Always wear safety goggles

Dra altyd veiligheids brille. (1)

> 1.6.3 Plastering trowel > Do not use the with a broken handle always replace with a new one. 9 > Rense and clean after use. > Consider any other correct answer. (1)

1.6.4 Monkey spanner . >Use the tool for its purpose. Gebruik gerredskap vir die doel waarvoor dit gemaak is 9

> Always stand firmly and well balanced. Staan altyd ferm en geballanseerd (1)

> Consider any other correct answer. 1.7 8 = Total number of bars in the group getal stawe in groep9 05 = Bar number/aantal stawe9 R = round bar ronde staaf 20 = Diameter of the bar in millimeters./diameter in millimeters 9 300=Center – center spacing in millimeters.

senter tot senter in millimeters 9 (4)

1.8 FIGURE 1.8 shows a concrete beam, copy the figure in your answer Book and:

1.8.1 Draw a longitudinal section through the beam to show all the reinforcing in

the beam. Show clearly the following: x Main bars/hoof x Anchor bars/ anker x Shear bar/skuif kragte x Binders/binders, x Minimum concrete cover/min beton dekking x All labels/ ALLE BYSKRIFTE (8)

9 9 . 9 9

x 9 .. . . . 9 9 9 FIGURE 1.8 1.9

1.9.1 It must be placed under all the windowsills./ vensterbanke. 9 1.9.2 It must be placed at 150mm above the ground level on a building/150mm bo grondvlak in muur. 9 1.9.3 It must be placed below the copings./onder oorhange. 9 1.9.4 It must be placed on top of lintels. Bo voorafvervaardigde beton lateie. 9 1.9.5 It must be placed between concrete floor and the hardcore. Tussen vloer en bo hardepiun vulling. 9 (5) Consider any other correct position.

1.10 FIGURE 1.10 9

9 9

(5) [60]

QUESTION 2: APPLIED MECHANICS 2.1

UNIT/EENHEID SYMBOL/SIMBOOL 2.1.1 Metre/Meter m Energy/Energie 2.1.2 Joules9 J Weight/ Gewig Kilogram9 2.1.3 Kg9 Force Krag 2.1.4 Newton9 N9

(4)

2.

(4) 2.2 (4) 2.3 20N 40N 30N 5m 6m 3m 2m A B B C D L R

S

50N n R

25N

60N

60°

60°

45°

30N

c

d

e

a

f

b

fa= R= 50N ef=S= 85N scale= 1: 1N

2.3.1 > 16m9 (1) 2.3.2 Calculate the size of the force at L. > Taking moments from RR to calculate RL. > > RL . 16 =(30N . 2m) + (5m . 40N) + (11m . 20N) 9 > RL16 =60 + 200 2209 > RL16/16 = 480/169 =30N 9 (4) > 2.3.3 Calculate the size of the force at R. > Taking moments from RL to calculate RR. > RR .16 =(20N . 5m) + (40N .11m) + (30N . 14m) 9 RR16 = 100N + 440N + 420N RR16/16 = 960N/169 =60N9 (4) 2.3.4 Do a test to see if your answers at L and R are correct. > Upwards forces /Opwaartse kragte = Downwards forces/ Afwaartse kragte kragte 30N + 40N + 20N = 30N + 60N9 90N = 90N9 (2) . 2.4 2.4.1 SfB = (value L) – 20N = 20N 9 2.4.2 SfC = value L) – 20N – 40N= -30N 9 2.4.3 SfD= (value L) – 20N – value at (2.4.2) – value (2.4.3) = -60N 9 9

(4) 2.5 2.5.1 BmB = (value L x 5m) = 150Nm 9 2.5.2 BmC = (value L x 11m) – (20N x 6m) = 210Nm 9 2.5.3 BmD = (value L x 14m) – (20N x 9m) – (30N x 3m) = 150Nm 9 (3)

2.6 FIGURE.2.5

40 N

5 N/m

A

D

B C

2 m

2 m 4 m

RL =25N

RR=35N

FIG 2.6.1 Convert the UDL spread across Point C-D into a point load

Verander verspreide belasting in n punt belasting. (2) > 4m . 5Nm9 =20N9 2.6.2 (4) > Point A = Left reactive./Linker reaksie = 25N9 > Point B = 25N - 40N = - 15N9 > Point C = 25N – 40N -0N = -15N9 > Point D = 25N -40N – 0N – 20N = -35N 9 2.6.3 1N : 1mm. 9 9

A

B C

D

25

-159

9 (4) 2.7 A B

40 40 30 60 2.7.1 Calculate the AREA of lamina A and B .Die Opp.van A enB > Shape A = half base . height Half basis maal loodregte hoogte = 30/2 . 409 = 15 . 40 = 600mm2 9 > Shape B = Length .width lxb = 60mm . 40mm9 = 2400mm29 (4) 2.7.2 > Lamina A = b/3 and h/39 = 30/3 and 40/39 =10mm9 and13,33mm9 > Lamina B = W/2 and L/29 = 30/2 and 40/29 =15mm 9and 20mm9 (8) 2.7.3

-40

C9

C9

(2) [50]

QUESTION 3:

USE ANSWERSHEET 3.1

FIGURE 3.1 3.1 . 99 99 9 9 9 99 99 99 99 9 9 9 9 (20) 3. 2 9 9 9 9 9 9 9 9 9 9 9 9 9 9 99 9 9 9 9 (20)

A

A

W2 W1

D

Gable roof line Internal

Roofline

FFL99

GL9

Total/Totaal=150

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