Civil Technology Grade 11 Eastern Cape November 2012 Memo

Downloaded from hlayiso.com Province of the EASTERN CAPE EDUCATION NATIONAL SENIOR CERTIFICATE GRADE 11 NOVEMBER 2012 CIVIL TECHNOLOGY MEMORANDUM MARKS: 200 This memorandum of 8 pages.

Downloaded from hlayiso.com 2 CIVIL TECHNOLOGY (NOVEMBER 2012) QUESTION 1: CONSTRUCTION PROCESSES 1.1 First aid is a temporary action to save life and limb before help arrives. Medical emergency is when somebody got sick and only a doctor can help. (2) 1.2  Do not move the victim unless he is in immediate danger.  Do not try to push broken bones back into place or straighten fracture.  Place person in comfortable position.  Make sure leg cannot move by splinting the limb. (4) 1.3 The entrepreneur is somebody in pursuit of profit, who is constantly searching for new ideas and new products. (2) 1.4 Trenches must be protected with fences / Red warning lights must be placed. (2) 1.5  Stack should be more than three times as high as it is wide.  Stacks should be bonded and interlocked.  Must be on strong, sound floor.  Choose site with care and avoid projection.  Should not obstruct fire-fighting equipment, lighting or ventilation.  Stacks in danger of falling down should be broken down immediately.  Climbing onto stacks without a ladder should be prohibited. (Any 6) (6) 1.6 Bathroom or toilet. (1) 1.7 Mortar / Silicon or fixing in wood frames. (2) 1.8 The size of window and wind pressure. (2) 1.9 Wall in stretcher bond. (9) [30]

Downloaded from hlayiso.com (NOVEMBER 2012) CIVIL TECHNOLOGY 3 QUESTION 2: ADVANCED CONSTRUCTION PROCESSES 2.1 Formwork is a moulded box into which concrete is poured to form a shape. (2) 2.2 Plastic spacer / steel cover stand. (2) 2.3 2.3.1 FALSE (1) 2.3.2 TRUE (1) 2.3.3 TRUE (1) 2.3.4 FALSE (1) 2.3.5 FALSE (1) 2.3.6 FALSE (1) 2.4 Concrete must be kept damp or be covered to prevent it from drying to fast and cause cracks. (2) 2.5 Trusses must be close together at a tiled roof and further apart for a corrugated iron roof. Tiled roofs are heavy in weight but corrugated iron roofs are light in weight. (4) 2.6 Flying shore / dead shore / raking shore. (3) 2.7 Scaffolding is temporary pipe frameworks which are constructed to support material, tools and workmen working at a high level above ground. (2) 2.8 The lock block makes it possible to fit a door lock and make it stable. (1) 2.9  Pressure exerted by the soil.  Type of soil on which wall is build.  Materials available.  The degree of sliding response.  The landscape.  Water filtering through. (Any 5) 2.10 Concrete cantilever walls / retaining walls with counter forts / precast concrete retaining structures. (5) 2.11 Vertical section through concrete beam with reinforcement. (3) [40]

Downloaded from hlayiso.com 4 CIVIL TECHNOLOGY (NOVEMBER 2012) QUESTION 3: CIVIL SERVICES 3.1 A – Bib tap B – P-Trap C – PVC access bend D – PVC Pipe E – Holderbat F – Concrete gully top G – Gully H – Water trap (8 x 1) (8) 3.2 A ball valve controls the inlet of water into a warm water cylinder. A built in element heats the water. The thermostat regulates the temperature. Copper pipes convey warm water to the taps in the house. (4) 3.3 Ball valve (1) 3.4 Bath, shower, basin, water closet, sink. (Any 4 x 1) (4) 3.5 Manhole is an access point to do inspection and unblock drains when blocked. Cast iron is used for lid of manhole. (3) 3.6 Advantages of copper pipes  Corrosion resistant.  Used for warm and cold water.  Easy to work with.  Easy to bend.  Low maintenance.  No heavy equipment needed to do piping. (Any 5 x 1) (5) 3.7 Regulations for storm water  Rainwater must be drained away from building.  Illegal to direct storm water into sewerage system.  Illegal to direct sewage water into rain water channels.  Where artificial channels connect with natural watercourse it must correspond with natural flow of water.  Storm water construction must adapt to environment.  Constructions must comply with local and national regulations. (Any 5 x 1) (5) [30]

Downloaded from hlayiso.com (NOVEMBER 2012) CIVIL TECHNOLOGY 5 QUESTION 4: MATERIALS 4.1 Missing word 4.1.1 Mortise and tenon joint. (1) 4.1.2 Countersunk screw. (1) 4.1.3 PVA-glue (1) 4.1.4 100 mm (1) 4.1.5 Vacuum breaker. (1) 4.1.6 Distribution box. (1) 4.2 Gang nailed plates / Bolts and nuts. (2) 4.3 Thermo-plastic – soft and can bend easy. Thermo-hardened plastic – hard and keep its shape after manufactured. (4) 4.4 Mechanical grading is done with machine to test strength of wood. Visual grading is done by eye to look for knots / cracks in wood. (4) 4.5 Use and properties of material: 4.5.1 Cast iron – manhole lid – hard and brittle. (2) 4.5.2 Safety glass – sliding door – strong. (2) 4.6 Preservatives characteristics  Must not spoil appearance of wood.  Must not interfere with dimensions of timber  Must not resist paint or glue.  Must not smell unpleasant.  Must not be harmful to humans and animals.  Must not reduce strength of wood.  Must not cause corrosion. (Any 4 x 1) (4) 4.7 Tiling: Area of floor – 3 m x 4 m = 12 m2 Amount of tiles needed - one tile = 250 mm x 250 mm – 16 tiles per m2 12 m2 = area to be tiled - 12 x 16 = 192 tiles needed. (6) [30]

Downloaded from hlayiso.com 6 CIVIL TECHNOLOGY (NOVEMBER 2012) QUESTION 5.1 ANSWER SHEET 5.1 5.1.1 Diagram (scale 1 mm = 1 N) (7) 5.1.2 Part Size BF √ 29 N CH √ 29 N DH √ 20 N EG √3N AF √ 20 N FG √ 46 N GH √ 46 N (7) [14]

Downloaded from hlayiso.com (NOVEMBER 2012) CIVIL TECHNOLOGY 7 5.2 Bending moments. 5.2.1 a = 20 N x 0 = 0 N b = (120 N x 0 m) + (80 N x 0 m) + (-20 N x 2 m) = -40 N c = (40 N x 0 m) + (-80 N x 4 m) + (-20 N x 6 m) +(120 x 4) 0 + -320 +-120 + 480 = + 40 N d = (-20 N x 8 m) +(-80 N x 6 m) +(-40 N x 2 m) +(10 N x 0 m) + (120 x 6 m) +(30 N x 0 m) -160 N + -480 N + -80 N + 0 N + 720 N + 0 N = 0 N (4) 5.3 Bending moment diagram. 5.3 Om A / around A Om B / around A (B x 8 m) = (80 N x 2 m) (A x 8 m) = (80 N x 6 m) B8 N/m = 160 N/m √ A8 N/m = 480 N/m √ B = √ A = √ B = 20 √ N √ A = 60 √ N √ (8) [30]

Downloaded from hlayiso.com 8 CIVIL TECHNOLOGY (NOVEMBER 2012) QUESTION 6 6.1 (24) (16) [40] TOTAL: 200