Civil Technology Grade 11 2020 Memo (Eng)

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE GRADE 11 NOVEMBER 2020 CIVIL TECHNOLOGY: CONSTRUCTION (EXEMPLAR) MARKS: 200 TIME: 3 hours *ICVLTE2* This paper consists of 16 pages, including 2 answer sheets.

Downloaded from hlayiso.com 2 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) REQUIREMENTS: 1. ANSWER BOOK 2. Drawing instruments 3. A non-programmable pocket calculator INSTRUCTIONS AND INFORMATION 1. This question paper consists of SIX questions: THREE questions are generic and THREE questions are subject specific. 2. Answer ALL the questions. 3. Answer each question as a whole. Do NOT separate subsections of questions. 4. Start the answer to EACH question on a NEW page. 5. Do NOT write in the margins of the ANSWER BOOK. 6. You may use sketches to illustrate your answers. 7. Write ALL calculations and answers in the ANSWER BOOK or on the attached ANSWER SHEETS. 8. Use the mark allocation as a guide to the length of your answers. 9. Make drawings and sketches in pencil, fully dimensioned and neatly finished off with descriptive titles and notes to conform to the SANS/SABS Code of Practice for Building Drawings. 10. For the purpose of this question paper, the size of a brick should be taken as 220 mm x 110 mm x 75 mm. 11. Use your own discretion where dimensions and/or details have been omitted. 12. Answer QUESTIONS 5.5 and 6.11 on the attached ANSWER SHEETS, using drawing instruments where necessary. 13. Write your NAME on all ANSWER SHEETS and hand them in with your ANSWER BOOK, whether you have answered the question or not. 14. Drawings in the question paper are NOT to scale. Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 3 QUESTION 1: SAFETY AND MATERIALS (GENERIC) Start this question on a NEW page. 1.1 What type of personal protective clothing is compulsory to wear on a building site at all times? (1) 1.2 Why should you remove your tie when you are operating machines with moving parts? (1) 1.3 Identify the following statements as TRUE or FALSE. 1.3.1 Two operators are allowed to operate a machine at the same time. (1) 1.3.2 Petrol engines may be used inside the workshop. (1) 1.3.3 Carry tools with sharp points facing downwards. (1) 1.3.4 Non-slip footwear is compulsory when you operate machinery. (1) 1.4 Answer the following questions with regard to the storing of materials on site. 1.4.1 What can materials be placed on if they cannot be stored directly onto the floor? (1) 1.4.2 Why should heaps of sand and stone be covered with plastic? (1) 1.4.3 Why should there be dividing walls to separate sand and stone? (1) 1.5 Calculate the maximum width of the stacked material if the stack is 1 800 mm high. (Show calculations.) (2) 1.6 What is the difference between unreinforced concrete and reinforced concrete? (1) 1.7 Name ONE purpose of coarse aggregate in a concrete mixture. (1) 1.8 What type of material increases the plasticity of mortar mixtures? (1) 1.9 What type of material is used as a levelling layer on concrete floors? (1) 1.10 Name the TWO main groups into which wood can be divided. (2 x 1) (2) 1.11 Name ONE use of plywood. (1) Copyright reserved Please turn over

Downloaded from hlayiso.com 4 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) 1.12 Identify the following metals as FERROUS or NON-FERROUS: 1.12.1 Copper (1) 1.12.2 Cast iron (1) 1.13 Name ONE use of lead in the building environment. (1) 1.14 Name ONE use of stainless steel in the building environment. (1) 1.15 Describe in steps how PVC adhesives must be used. (3 x 1) (3) 1.16 What is the minimum thickness of a windowpane? (1) 1.17 Name TWO uses of translucent glass. (2 x 1) (2) 1.18 Name the TWO main groups into which plastic can be divided. (2 x 1) (2) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 5 QUESTION 2: EQUIPMENT, TOOLS AND GRAPHICS (GENERIC) Start this question on a NEW page. 2.1 Why must a spade be oiled lightly when it is not used? (1) 2.2 Briefly explain the difference in the uses of the cold chisel and bolster. (2) 2.3 Name the tools in FIGURES 2.3.1 to 2.3.3 and name ONE use of each. FIGURE 2.3.1 FIGURE 2.3.2 FIGURE 2.3.3 (3 x 2) (6) 2.4 Answer the following questions with regard to the tool in FIGURE 2.4. FIGURE 2.4 2.4.1 What is this tool called? (1) 2.4.2 Briefly explain how this tool will be used during the installation of a doorframe. (2) 2.4.3 Name TWO caring measures of this tool. (2 x 1) (2) 2.5 Answer the following questions with regard to the tool in FIGURE 2.5. FIGURE 2.5 2.5.1 What is this tool called? (1) 2.5.2 Name TWO uses of this tool. (2 x 1) (2) Copyright reserved Please turn over

Downloaded from hlayiso.com 6 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) 2.6 Answer the following questions with regard to the detail drawing in FIGURE 2.6. A B E C D FIGURE 2.6 2.6.1 Why are detail drawings drawn on an enlarged scale? (1) 2.6.2 Briefly motivate why descriptive notes are included on detail drawings. (2) 2.6.3 Which type of eave construction is illustrated in FIGURE 2.6? (1) 2.6.4 Name parts A to E. (5) 2.6.5 What is the purpose of part B? (1) 2.6.6 What is the purpose of part C? (1) 2.7 Explain the purpose of the control test for floor plan dimensions. (2) 2.8 Explain the position, on the drawing sheet for building plans, where the north arrow must be indicated. (2) 2.9 On which scale are floor plans usually drawn? (1) 2.10 Identify the following abbreviations on elevations of buildings: 2.10.1 NGL (1) 2.10.2 FFL (1) 2.11 Make neat sketches to illustrate the following symbols on floor plans: 2.11.1 Window (2) 2.11.2 Electricity meter (2) 2.11.3 Drain (1) [40] Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 7 QUESTION 3: JOINING AND GRAPHICS (GENERIC) Start this question on a NEW page. 3.1 Answer the following questions with regard to the plan elevation in FIGURE 3.1. BOSTON STREET B A C PLOT 123 PLOT 125 PLOT 127 PLOT 134 PLOT 136 FIGURE 3.1 3.1.1 What is the plan elevation called? (1) 3.1.2 What is the plot number of the plot at the west side of plot 125? (1) 3.1.3 What are the lines at A called? (1) 3.1.4 Identify the symbols at B and C. (2 x 1) (2) Copyright reserved Please turn over

Downloaded from hlayiso.com 8 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) 3.2 Name ONE use of PVC glue. (1) 3.3 Which adhesive joining material consists of glue? (1) 3.4 Make neat sketches to illustrate the following symbols on a floor plan: 3.4.1 Gully (2) 3.4.2 Earth (2) 3.4.3 Dressed wood (2) 3.5 Briefly describe the application steps of PVA adhesive. (3 x 1) (3) 3.6 Briefly name THREE precautions when using contact glue. (3 x 1) (3) 3.7 Name any FIVE uses of silicone. (5 x 1) (5) 3.8 State TWO properties of EACH of the following adhesives: 3.8.1 Silicone (2) 3.8.2 Contact glue (2) 3.8.3 PVA glue (2) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 9 QUESTION 4: MATERIAL, EQUIPMENT AND JOINING (SPECIFIC) Start this question on a NEW page. 4.1 Identify the following statements as TRUE or FALSE. 4.1.1 Face bricks do not require plaster. (1) 4.1.2 Solid concrete bricks cannot be cut by using a trowel. (1) 4.1.3 The cavities in a cellular brick form more than 25% of the brick volume. (1) 4.1.4 The frogs in a keyed brick increase the manufacturing cost. (1) 4.1.5 Hollow concrete blocks are brittle and break easily. (1) 4.1.6 Concrete paving bricks can be laid without mortar. (1) 4.2 What is the length of a queen closer? (1) 4.3 In what type of bond is the queen closer used? (1) 4.4 Name the THREE basic materials for the manufacturing of clay bricks. (3 x 1) (3) 4.5 Choose a description from COLUMN B that best fits the item in COLUMN A. Write only the letter next to the question numbers in the ANSWER BOOK, for example, 4.5.6 H. COLUMN A COLUMN B 4.5.1 Durability A lintels 4.5.2 15 MPa concrete B resistant to scratching and scouring 4.5.3 Elasticity C changes form permanently 4.5.4 30 MPa concrete D floor slabs 4.5.5 Hardness E resistant to environmental factors F can return to its original shape G foundations (5 x 1) (5) Copyright reserved Please turn over

Downloaded from hlayiso.com 10 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) 4.6 Answer the following with regard to the construction machine in FIGURE 4.6. FIGURE 4.6 4.6.1 What is this machine called? (1) 4.6.2 Name ONE use of this machine. (1) 4.7 Answer the following questions in regard to scaffolding. 4.7.1 What is the purpose/function of the kickboard? (1) 4.7.2 What is the purpose/function of the soleplate? (1) 4.7.3 What are the horizontal parts of scaffolding called? (1) 4.7.4 What type of scaffolding is limited to a height below two metres? (1) 4.7.5 What type of scaffolding can easily be moved from one place to another? (1) 4.8 Name TWO ways of fixing wooden door and wooden window frames to brickwork. (2 x 1) (2) 4.9 Name TWO types of wall ties. (2 x 1) (2) 4.10 Answer the following questions with regard to cavity wall construction. 4.10.1 What is the purpose/function of weep holes? (1) 4.10.2 What is the maximum length of a cavity wall? (1) 4.10.3 In what type of climate will ventilating bricks be placed at the bottom of external walls? (1) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 11 QUESTION 5: EXCAVATIONS, FOUNDATIONS AND STEEL (SPECIFIC) Start this question on a NEW page. 5.1 Answer the following questions with regard to the foundation excavation in FIGURE 5.1. A C B Peg FIGURE 5.1 5.1.1 Name parts A to C. (3 x 1) (3) 5.1.2 How deep must the pegs be driven into the ground? (1) 5.1.3 What is the purpose/function of the pegs? (1) 5.1.4 Name TWO types of equipment that can be used to ensure that the pegs are level. (2 x 1) (2) 5.2 What is the cheapest method of dewatering trenches? (1) 5.3 Identify the following statements as TRUE or FALSE. 5.3.1 Topsoil must be cleared to a depth of 300 mm. (1) 5.3.2 Timber is the best material for formwork at excavations. (1) 5.3.3 Shutter oil makes the removal of formwork boards easier. (1) 5.4 Identify and choose THREE of the conditions below that could cause trench accidents. 5.4.1 Excavated earth is more than 600 mm from the edge of the trench 5.4.2 Excavated earth is less than 600 mm from the edge of the trench 5.4.3 Changing ground conditions, especially after rainfalls 5.4.4 Ground that was not previously disturbed 5.4.5 Near streams, old sewers and underground cables (3 x 1) (3) Copyright reserved Please turn over

Downloaded from hlayiso.com 12 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) 5.5 ANSWER SHEET A shows an incomplete vertical section of an excavation in firm soil. Complete ANSWER SHEET A by drawing in the necessary formwork parts on the left-hand side. (6) 5.6 Choose a description from COLUMN B that best fits the item in COLUMN A. Write only the letter next to the question numbers in the ANSWER BOOK, for example 5.6.4 E. COLUMN A COLUMN B 5.6.1 Franki-pile A steel tube caisson stays in the ground 5.6.2 Prefabricated pile B enlarged concrete base 5.6.3 Short-bored pile C maximum depth of 15 metres D concrete pile with a steel tip (3 x 1) (3) 5.7 Name THREE advantages of piles. (3 x 1) (3) 5.8 Choose a steel profile from the list below for each of the following descriptions. I-beam; H-beam; U-channel; lip channel; angle iron 5.8.1 Are sometimes referred to as purlins (1) 5.8.2 The flanges and web differ in size (1) 5.8.3 Metal rail that fits over shower glass panels (1) 5.8.4 The flanges and web are the same size (1) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 13 QUESTION 6: FORMWORK, BRICKWORK, STAIRS AND QUANTITIES (SPECIFIC) Start this question on a NEW page. 6.1 Describe THREE requirements of good formwork. (3 x 1) (3) 6.2 Define the following terms: 6.2.1 In-situ concrete (1) 6.2.2 Formwork (2) 6.3 Name TWO reasons for the cover depth of reinforcement in concrete. (2 x 1) (2) 6.4 What is the thickness of a lintel used in a one-brick wall? (1) 6.5 Name TWO disadvantages of prefabricated lintels. (2 x 1) (2) 6.6 Why are the sides of lintels slightly tapered? (1) 6.7 Answer the following questions on the wall construction in FIGURE 6.7. A D C B FIGURE 6.7 6.7.1 Is this a rough or a gauged arch in the wall construction? (1) 6.7.2 Name parts A to D. (4 x 1) (4) 6.8 Name ONE type of material that can be used for the construction of stairs. (1) 6.9 Provide ONE word for the following statements of staircases.: 6.9.1 The vertical part of a stair (1) 6.9.2 The horizontal part of a stair (1) 6.9.3 The horizontal distance covered by the flight of stairs (1) 6.10 What is the minimum width of a stair? (1) Copyright reserved Please turn over

Downloaded from hlayiso.com 14 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) 6.11 FIGURE 6.11 shows a floor plan of a single garage. Detail: D1 = 2 400 x 2 100 mm Wall width = 220 mm and the wall height = 2 700 mm Outside measurement = 6 000 mm and the inside measurement = 3 000 mm Calculate on ANSWER SHEET B the amount of bricks required. (18) 6 000 3 000 D1 Not to scale FIGURE 6.11 [40] TOTAL: 200 Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 15 CIVIL TECHNOLOGY NAME ANSWER SHEET A AND CONSTRUCTION SURNAME 5.5 ANSWER SHEET A shows an incomplete vertical section of an excavation in loose, dry soil. Complete ANSWER SHEET A by drawing in the necessary formwork parts on the left-hand side. (6) Not to scale ASSESSMENT CRITERIA MARK CANDIDATE’S MARK Vertical plank 1 Vertical plank - correct depth 1 Yoke 1 Wedge 1 Strut 1 Parts drawn in good proportion / scale 1 TOTAL 6 Copyright reserved Please turn over

Downloaded from hlayiso.com 16 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) NAME CIVIL TECHNOLOGY ANSWER SHEET B CONSTRUCTION AND SURNAME 6.11 Calculate the amount of bricks required. (18) A B C D Centre line: Area of wall: Area of door: True area of bricks: Bricks: Copyright reserved Please turn over

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE GRADE 11 NOVEMBER 2020 CIVIL TECHNOLOGY: CONSTRUCTION MARKING GUIDELINE (EXEMPLAR) MARKS: 200 This marking guideline consists of 15 pages.

Downloaded from hlayiso.com 2 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) QUESTION 1: SAFETY AND MATERIALS (GENERIC) 1.1 Hard hat (1) 1.2 A tie can get stuck in the moving parts and cause injuries (1) 1.3 1.3.1 False (1) 1.3.2 False (1) 1.3.3 True (1) 1.3.4 True (1) 1.4 Storing of materials on site. 1.4.1 Any ONE area on which materials can be placed. x Shelves x Pallets (1 x 1) (1) 1.4.2 Any ONE reason why heaps of sand and stone should be covered with plastic. x To keep it clean x To prevent being washed away during rainfalls (Similar answer) (1 x 1) (1) 1.4.3 To prevent the materials from mixing (1) 1.5 1 800 mm ÷ 3 (1) = 600 mm (1) (2) 1.6 Reinforced concrete contains steel reinforcement bars (1) 1.7 Any ONE purpose of coarse aggregate in a concrete mixture: x Provides volume stability to the concrete x Economical – forms the bulk of the mixture x Lowers the shrinkage potential of the concrete (1 x 1) (1) 1.8 Lime (1) 1.9 Screed (1) 1.10 Hardwood (1) and softwood (1) (2) 1.11 Any ONE use of plywood: x Bottoms of drawers x Wall panelling x Door panels x Cupboard panels x Interior balustrades / railings x Framing (1 x 1) (1) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 3 1.12 1.12.1 Non-ferrous metal (1) 1.12.2 Ferrous metal (1) 1.13 Any ONE use of lead in the building environment: x Batteries x Cable sheaths x Lead pipes (Similar answer) (1 x 1) (1) 1.14 Any ONE use of stainless steel in the building environment: x Sinks x Wash tubs / baths x Water taps x Water traps x Extractor fans (Similar answer) (1 x 1) (1) 1.15 x Dry-fit the parts to make sure the pipes are fitted in the right direction (1) x Apply a light coat of PVC glue to the fitting and the pipe (1) x Slightly twist and push parts into position (1) (3) 1.16 3 mm (1) 1.17 Any TWO uses of translucent glass: x Bathroom / toilet windowpanes x Glass bricks for walls x Doors x Urban furniture and appliances (2 x 1) (2) 1.18 Thermoplastic (1) and thermosetting plastic (1) (2) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com 4 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) QUESTION 2: EQUIPMENT, TOOLS AND GRAPHICS (GENERIC) 2.1 Prevent rust (1) 2.2 Cold chisel is used to cut holes / grooves in concrete / brickwork / metal (1) Bolster is used to cut bricks (1) (2) 2.3 Name the tools in FIGURES 2.3.1 to 2.3.3 and name ONE use of each. 2.3.1 Pick (1) Any ONE use (1): • Loosening hard ground during excavations • Breaking up rock (2) 2.3.2 Block brush (1) Any ONE use (1): • Moistening plaster • Dampening surfaces / concrete (2) 2.3.3 Plane (1) Any ONE use (1): • Planing timber • Smoothing rough surfaces on timber (2) 2.4 2.4.1 Spirit level (1) 2.4.2 Test if the head is horizontal (1) and if the stiles are installed vertically (1) (2) 2.4.3 Any TWO precautions for the spirit level: x Wipe clean after use x Not allow plaster / cement to dry on it x Store in a dry place (2 x 1) (2) 2.5 2.5.1 Portable circular saw (1) 2.5.2 Any TWO uses: • Cutting wood • Cutting other materials with specific blades • Cutting rebates (2 x 1) (2) 2.6 2.6.1 To include more information (1) 2.6.2 To highlight details (1) that may not be clearly understood (1) (2) 2.6.3 Open eave (1) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 5 2.6.4 A – DPC (1) B – Beam filling / half brick wall (1) C – Facia board / plank (1) D – Single brick wall (1) E – Ceiling / Cornice (1) (5) 2.6.5 Prevents dust / vermin / etc. from entering underneath the roof (1) 2.6.6 Fixing gutters (1) 2.7 To ensure that the horizontal and vertical external measurements (1) correspond with the individually internal measurements (1) (2) 2.8 Bottom (1) on the right-hand side of drawing sheet (1) (2) 2.9 1 : 100 (1) 2.10 2.10.1 Natural ground level (1) 2.10.2 Finished floor level (1) 2.11 2.11.1 (2) 2.11.2 W (2) 2.11.3 (1) [40] Copyright reserved Please turn over

Downloaded from hlayiso.com 6 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) QUESTION 3: QUANTITIES, JOINING AND GRAPHICS (GENERIC) 3.1 3.1.1 Site plan (1) 3.1.2 123 (1) 3.1.3 Boundary wall (1) 3.1.4 B – Manhole C – Rodding eye (2) 3.2 ONE use of PVC glue: x To bond PVC pipes (1 x 1) (1) 3.3 PVC adhesive (1) 3.4 3.4.1 (2) 3.4.2 (2) 3.4.3 (2) 3.5 The application steps for PVA adhesive: (1) Dry-fit parts to make sure the pipes are fitted in the right direction (2) Apply a light coat of PVC glue to the fitting and the pipe (3) Slightly twist and push parts into position (3) 3.6 Any THREE precautions when using contact glue: x Be careful not to allow the adhesive to dry fully before assembly x Do not wait too long before assembling the parts x The glue should not be applied too quickly (3 x 1) (3) 3.7 Any FIVE uses of silicone: x Basic sealant against air and water leakage x Textile uses x Enhances materials x Used in aviation x Construction repairs x Electronics (5 x 1) (5) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 7 3.8 Any TWO properties of EACH of the following adhesives. 3.8.1 Silicone x Heat resistant x Conductive or insulating x Rubbery x Low heat conductivity x Resist chemicals / low chemical reaction x Low toxicity x Waterproof / repels water (2 x 1) (2) 3.8.2 Contact glue x Adheres well to most materials (plastics, rubber, paper, wood, etc.) x Sticks to most non-porous materials x Rubbery and has a creamy colour x Flammable x Water resistant x Dries quickly and adheres / sticks immediately (2 x 1) (2) 3.8.3 PVA glue x Water-based x For interior and exterior use x White or yellowish colour before it dries, clear when dry x Yellow PVA is not completely clear on drying x Super strong when used on wood x Dries quickly x Inexpensive (2 x 1) (2) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com 8 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) QUESTION 4: MATERIALS, EQUIPMENT AND JOINING (SPECIFIC) 4.1 4.1.1 True (1) 4.1.2 True (1) 4.1.3 False (1) 4.1.4 False (1) 4.1.5 True (1) 4.1.6 True (1) 4.2 220 mm (1) 4.3 English bond (1) 4.4 Clay / shale (1), sand (1) and lime (1) (3) 4.5 4.5.1 E (resistant against environmental factors) (1) 4.5.2 G (foundations) (1) 4.5.3 F (can return to its original shape) (1) 4.5.4 A (lintels) (1) 4.5.5 B (resistant against scratching and scouring) (1) 4.6 4.6.1 Concrete mixer (1) 4.6.2 Mixing large amounts of concrete, screed or mortar (1) 4.7 4.7.1 Any ONE purpose of the kickboard on scaffolding: • Prevent tools from falling off • Prevents material from falling off • Prevent workers from slipping and injuring themselves (1 x 1) (1) 4.7.2 Prevent the scaffolding standards from sagging into the ground. (1) 4.7.3 Horizontal transoms (1) 4.7.4 Builder’s trestle (1) 4.7.5 Mobile scaffolding (1) 4.8 Any TWO ways to fix wooden door and window frames to brickwork: • Hoop iron ties • Long nails • Fixing lug / metal straps (2 x 1) (2) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 9 4.9 Any TWO types of wall ties: • Stainless steel wall tie • Butterfly pattern • Nylon wall tie • Twisted pattern • Double triangle (2 x 1) (2) 4.10 4.10.1 As an outlet for water inside the wall / provide air to the inside of the wall to help it drying out (1) 4.10.2 Eight metres (1) 4.10.3 Very wet regions (1) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com 10 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) QUESTION 5: EXCAVATIONS, FOUNDATIONS AND STEEL (SPECIFIC) 5.1 5.1.1 A – Sighting line (1) B – Boning / measuring stick (1) C – Profile board / profile plank (1) 5.1.2 150 mm (1) 5.1.3 Top of peg is to where the foundation must be poured (1) 5.1.4 Any TWO types of equipment that can be used to ensure that the pegs are level: • Spirit level / spirit level with straight edge • Dumpy level • Pipe level (2 x 1) (2) 5.2 Scooping water with a bucket (1) 5.3 5.3.1 True (1) 5.3.2 True (1) 5.3.3 True (1) 5.4 Identify and choose THREE of the statements below that could cause trench accidents: 5.4.2 Excavated earth is less than 600 mm from the edge of the trench (1) 5.4.3 Changing ground conditions, especially after rainfalls (1) 5.4.5 Near streams, old sewers and underground cables (1) 5.5 See ANSWER SHEET A. (6) 5.6 5.6.1 B (enlarge concrete base) (1) 5.6.2 D (concrete pile with a steel tip) (1) 5.6.3 C (maximum depth of 15 metres) (1) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 11 5.7 Any THREE advantages of piles: • Can be used in poor soil • Can be used anywhere, even in water • Larger base ensures stability • Relatively quick and easy to install, if equipment is available • If prefabricated piles are used, much time is saved • Resists tensile stress well • Quick and less expensive to produce • Can be manufactured elsewhere beforehand • Installation can continue, even in poor weather conditions • Length of piles can easily be adjusted, depending on circumstances • Offers sound resistance against moving soil (3 x 1) (3) 5.8 5.8.1 Lip channel (are sometimes referred to as purlins) (1) 5.8.2 I-beam (the flanges and web differ in size) (1) 5.8.3 U-channel (metal rail that fits over shower glass panels) (1) 5.8.4 H-beam (the flanges and web are the same in size) (1) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com 12 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) QUESTION 6: FORMWORK, BRICKWORK, STAIRS AND QUANTITIES (SPECIFIC) 6.1 Any THREE requirements of good formwork: • Sturdy enough to bear the mass of wet concrete without collapsing • Strong enough to provide sufficient support, without deflection • Easy to repair on site • Erected accurately • Sealed properly – no leaking and forming of honeycombing / fins • Free of dirt (sawdust / release agents) • Quick and simple to erect (hand / mechanical) • Correct depth for reinforcing – to prevent failure • Easy to remove • Close-fitting along joints and seams • Must be made of recyclable components (3 x 1) (3) 6.2 6.2.1 In-situ concrete: prepared / mixed concrete on site (1) 6.2.2 Formwork: a mould or structure into which wet concrete is poured to take the shape, (1) and to support until concrete has hardened and strengthened (1) (2) 6.3 Any TWO reasons for the cover depth of reinforcement in concrete: • To protect steel against corrosion / rust • To provide adequate bonding between the steel and concrete • To ensure adequate protection of steel in an event of fire (2 x 1) (2) 6.4 75 mm (1) 6.5 Any TWO disadvantages of prefabricated lintels: • Lintels are only available 28 days after casting – curing time • Trained workers are needed to make lintels • Shapes have to be strengthened by every means possible – e.g. camps • Must be designed by a capable designer (2 x 1) (2) 6.6 To make it easier to remove the lintel from the mould (1) 6.7 6.7.1 Gauged arch (1) 6.7.2 A – Extrados (1) B – Springer (1) C – Intrados (1) D – Key brick (1) 6.8 Any ONE type of material that can be used for the construction of stairs: • Timber / wood • Steel • Concrete (1 x 1) (1) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 13 6.9 6.9.1 Riser (1) 6.9.2 Tread / going (1) 6.9.3 Run (1) 6.10 750 mm (1) 6.11 See ANSWER SHEET B. (18) [40] TOTAL: 200 Copyright reserved Please turn over

Downloaded from hlayiso.com 14 CIVIL TECHNOLOGY: CONSTRUCTION (EC/NOVEMBER 2020) CIVIL TECHNOLOGY NAME ANSWER SHEET A AND CONSTRUCTION SURNAME 5.5 ANSWER SHEET A shows an incomplete vertical section of an excavation in loose, dry soil. Complete ANSWER SHEET A by drawing the necessary formwork parts on the left-hand side. (6) Parts drawn in good proportion Vertical plank 1 Vertical plank - correct depth 1 Yoke 1 Wedge 1 Strut 1 Parts drawn in good proportion / scale 1 TOTAL 6 Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2020) CIVIL TECHNOLOGY: CONSTRUCTION 15 NAME CIVIL TECHNOLOGY ANSWER SHEET B CONSTRUCTION AND SURNAME 6.11 Calculate the amount of bricks required. A B C D Centre line: 2 / 6 000 = 12 000 (1) 2 / 3 000 = 6 000 (1) 18 000 (1) (3) Area of wall: 1 / (1) 18 m (1) Area = L x H 2,7 m (1) 48,6 m² (1) (4) Area of door: 1 / (1) 2,4 m (1) Opp. = B x H 2,1 m (1) 5,04 m² (1) (4) True area of bricks: = Area of wall - area of door = 48,6 m² (1) - 5,04 m² (1) = 43,56 m² (1) (3) Bricks: 2 / (1) 43,56 m² (1) 50 Bricks / m² (2 leaves) 50 (1) 4 356 bricks (1) (4) OR 1/ 43,56 m² 100 4 356 bricks [18] Copyright reserved Please turn over

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