Civil Technology Grade 11 Eastern Cape November 2020 Memo

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.  Shelves  Pallets (1 x 1) (1) 1.4.2 Any ONE reason why heaps of sand and stone should be covered with plastic.  To keep it clean  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:  Provides volume stability to the concrete  Economical – forms the bulk of the mixture  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:  Bottoms of drawers  Wall panelling  Door panels  Cupboard panels  Interior balustrades / railings  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:  Batteries  Cable sheaths  Lead pipes (Similar answer) (1 x 1) (1) 1.14 Any ONE use of stainless steel in the building environment:  Sinks  Wash tubs / baths  Water taps  Water traps  Extractor fans (Similar answer) (1 x 1) (1) 1.15  Dry-fit the parts to make sure the pipes are fitted in the right direction (1)  Apply a light coat of PVC glue to the fitting and the pipe (1)  Slightly twist and push parts into position (1) (3) 1.16 3 mm (1) 1.17 Any TWO uses of translucent glass:  Bathroom / toilet windowpanes  Glass bricks for walls  Doors  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:  Wipe clean after use  Not allow plaster / cement to dry on it  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:  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:  Be careful not to allow the adhesive to dry fully before assembly  Do not wait too long before assembling the parts  The glue should not be applied too quickly (3 x 1) (3) 3.7 Any FIVE uses of silicone:  Basic sealant against air and water leakage  Textile uses  Enhances materials  Used in aviation  Construction repairs  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  Heat resistant  Conductive or insulating  Rubbery  Low heat conductivity  Resist chemicals / low chemical reaction  Low toxicity  Waterproof / repels water (2 x 1) (2) 3.8.2 Contact glue  Adheres well to most materials (plastics, rubber, paper, wood, etc.)  Sticks to most non-porous materials  Rubbery and has a creamy colour  Flammable  Water resistant  Dries quickly and adheres / sticks immediately (2 x 1) (2) 3.8.3 PVA glue  Water-based  For interior and exterior use  White or yellowish colour before it dries, clear when dry  Yellow PVA is not completely clear on drying  Super strong when used on wood  Dries quickly  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