Civil Technology Nov 2020 (Woodworking) Memo Eng_hlayiso.com_.pdf

Downloaded from hlayiso.com GRAAD 12 SENIOR CERTIFICATE/ NATIONAL SENIOR CERTIFICATE GRADE 12 CIVIL TECHNOLOGY: WOODWORKING NOVEMBER 2020 MARKING GUIDELINES MARKS: 200 These marking guidelines consist of 21 pages. Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Civil Services 2 DBE/November 2020 SC/NSC – Marking Guidelines QUESTION 1: OHSA, SAFETY, MATERIALS, TOOLS, EQUIPMENT AND JOINING (GENERIC) 1.1 1.1.1 E (1) 1.1.2 C (1) 1.1.3 D (1) 1.1.4 H (1) 1.1.5 B (1) 1.1.6 F (1) 1.1.7 A/I  (1) 1.1.8 G/K  (1) 1.2 Galvanising:  Adds strength to the original, uncoated metal.   Make it last longer/Preservation/Durable.  Decorative/Enhance appearance.  Makes metal thicker than the uncoated metal.  Nails and screws prevent staining.  Prevent the material from rusting/corroding. ANY ONE OF THE ABOVE (1) 1.3  Material safety data sheet.   Sufficient information regarding the protection of health and safety. ANY ONE OF THE ABOVE (1) 1.4  Materials can be moved manually/by means of a wheelbarrow/trolley.   Materials can be moved by means of machinery/builders hoist/truck/ crane/tractor/conveyor/fork lift.  (2) 1.5 Water-based paint:  Dry quickly.   Allows marks/smudges to be easily cleaned with water.   Give an elastic flexible finish.  Durable  Gives a decorative finish.  Enhances the appearance.  Resistant to cracking.  Cost effective/Cheaper.  Easy to apply. ANY TWO OF THE ABOVE (2) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 3 DBE/November 2020 SC/NSC – Marking Guidelines 1.6 1.6.1 Multi detector  (1) 1.6.2 Care of the multi detector:  Place the multi-detector in its holder directly after use.   Do not bump the instrument against objects or drop it.   Protect the multi-detector against moisture and direct sunlight.  If the measuring tool is not used for a long period, remove the battery.  Wipe away dirt or spots with a dry, soft cloth.  Switch off the device before storing. ANY TWO OF THE ABOVE (2) 1.7  Drill a hole in the wall.   Insert the plastic plug into the hole.   Align the hole in the bracket with the hole in the wall, and fasten the screw.  (3) [20] Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 4 DBE/November 2020 SC/NSC – Marking Guidelines QUESTION 2: GRAPHICS AS MEANS OF COMMUNICATION (GENERIC) NO. QUESTION ANSWER MARKS Identify the elevation in FIGURE 1 South Elevation  1 A. Describe the type of house that is Double-storey house/Building/Multi-storey 2 1 indicated in FIGURE A. building  Ridge Capping/Ridge tile/Ridge 3 Identify number 1. 1 plate/Ridge  4 Identify number 3. Fascia board  1 5 Identify number 4. Overhang/Eave/Dimension line  1 Identify the fastener indicated by 6 Holder bat/Clamp/Clip  1 number 5. Window/Window frame/Casement/ 7 Identify number 6. 1 Casement frame  Shoe/Down pipe outlet/ 8 Identify number 7. 1 Spout  9 Identify number 8. Natural ground level/NGL  1 What does DPM stands for, as 10 Damp proof membrane  1 indicated in the notes? 11 Identify number 10. Built-in cupboard/BIC  1 Recommend a suitable material Fibre cement/Galvanised sheeting/Sheet that can be used for the metal/Timber/Wood/Plastic/Fibre 12 glass/Aluminium sheeting  1 manufacturing of number 2 in FIGURE A. Name the TWO elevations on West elevation  13 2 which number 2 is installed. East elevation  Describe the purpose of number The gutter is fixed against it.  14 It finishes off the roof. 1 3. Protect roofs/rafters from rainwater. Deduce ONE feature that has Step missing at the door  15 been omitted from the elevation in 1 FIGURE A. Sill missing at the window Recommend any TWO sanitary Wash basin/Wash hand basin/Hand fitments carrying waste water basin/Basin/WB/WHB/HB  16 other than a bath that can be 2 Shower/SH  installed in the room indicated by number 11. Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 5 DBE/November 2020 SC/NSC – Marking Guidelines What sanitary fixture carrying soil Water closet/WC  17 water can be installed in the room 1 indicated by number 12? Bidet/BT The two side windows are opening to the Describe the error that appears at wrong sides/No window sill/The window 18 number 6 in the elevation in 1 drawn in FIGURE A is not the same as that FIGURE A. in the window schedule/Window opening. State the reference code for this 19 QP 4 - 2020  1 plan. 20 Which room will number 13 serve? Bedroom 2  1 Electrical wiring/cable/Wiring/Wiring from 21 What does the line between light switch to light/Shows which switch 1 numbers 13 and 14 represent? operates which electrical fitting/Electrical connection 15: Single tube fluorescent light.  17: Double/ tube fluorescent light.  Differentiate between number 15 15: Will use less electricity/Watt than 17/ 22 in FIGURE B and number 17 in 15: Will provide less light than 17/ 2 the notes. 15: Running cost will be cheaper than 17. 15: Has one tube/ 1 x 40 Watt. 17: Has two tubes/ 2 x 40 Watt. Explain the installation of brick Brick force must be installed between force from the top of the window to 23 every course above the window up to wall 1 the wall plate, as indicated by the plate.  architect. Face bricks  Plaster and paint/Plaster/Paint/Plaster Recommend a possible finish for 24 finish (Smooth finish/Splatter finish/Wavy 1 the outside walls of the house. finish/Bagging finish) Cladding/Tiling Deduce from FIGURE 2 which 25 elevation does NOT have East elevation  1 windows. Deduce the thickness of the 26 220 mm  1 external wall from FIGURE 2. Name a material that can be used Wood/Timber/Stainless steel/Mild 27 to close the open sides of number 1 steel/Steel/Aluminium/Glass/Perspex  16. Name the town in which the 28 Cradock  1 proposed dwelling will be build. Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 6 DBE/November 2020 SC/NSC – Marking Guidelines Calculate the area of the ℓxb ℓxb 29 bathroom. Show ALL calculations. = 2 m x 2 m OR 2 000 mm x 2 000 mm 3 Give your answer in m². = 4 m²  = 4 m² 30 Calculate the total length of the 220 + 3 000  + 110 wall on the eastern side of the building. Show ALL calculations. + 1 400 + 110 + 2 000 +220 The length must be indicated in = 7 060 mm metres. = 7,06 m  OR 220 + 3 000 + 110 + 3 510 + 220 = 7 060 mm = 7,06 m 6 TOTAL: 40 Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 7 DBE/November 2020 SC/NSC – Marking Guidelines QUESTION 3: CASEMENTS, CUPBOARDS, WALL-PANELLING AND QUANTITIES (SPECIFIC) 3.1 Give ONE term for the following descriptions: 3.1.1 Quadrant  (1) 3.1.2 Mullion  (1) 3.1.3 Putty  (1) 3.1.4 Tongue-and –groove  (1) 3.1.5 Top rail  (1) 3.2 SLOPE    DRIP GROOVE REBATE Correctness of drawing  ASSESSMENT CRITERIA MARK Rebate 1 Drip groove 1 Slope 1 Correctness of drawing 1 TOTAL: 4 (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 8 DBE/November 2020 SC/NSC – Marking Guidelines 3.3  TOP   TOP RAIL SIDES   MIDDLE SHELF  DOORS  BOTTOM SHELF  KICK PLATE Correctness of drawing  ASSESSMENT CRITERIA MARK Kick plate 1 Sides 1 Top rail 1 Bottom shelf 1 Top 32 mm thick 1 Top overhang 30 mm on either side 1 Middle shelf 1 Doors 1 Correctness of drawing/Scale drawing 1 TOTAL: 9 (9) THE SIDES CAN ALSO BE INDICATED IN DARK LINES IF THE DOORS ARE FITTED BETWEEN THE SIDES Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 9 DBE/November 2020 SC/NSC – Marking Guidelines 3.4 WALL  ROUGH GROUND STRIP    SKIRTING BOARDS OR WALL STRIP ROUGH GROUND BOARDS SKIRTING ASSESSMENT CRITERIA MARK Rough ground 1 Strip boards 2 Skirting 1 TOTAL: 4 (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 10 DBE/November 2020 SC/NSC – Marking Guidelines A B C D 3.5.1 LENGTH OF FASCIA BOARD NEEDED LENGTH OF THE ROOF 230 + 12 000 + 230 = 12 460 mm  WIDTH OF THE ROOF 230 + 6 000 + 230 = 6 460 mm  TOTAL LENGTH OF FASCIA BOARD NEEDED 2(12 460 + 6 460)  = 37 840 mm  OR = 37,84 m (4) 3.5.2 LENGTH OF SKIRTING NEEDED INSIDE LENGTH OF WALL 12 000 – 220 – 220 = 11 560 mm  INSIDE WIDTH OF WALL 6 000 – 220 – 220 = 5 560 mm  TOTAL LENGTH OF SKIRTING NEEDED 2(11 560 + 5560) - 10 000 (door opening)  = 24 240 mm  OR = 24,24 m (4) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 11 DBE/November 2020 SC/NSC – Marking Guidelines QUESTION 4: ROOFS, CEILINGS, TOOLS AND EQUIPMENT, AND MATERIALS (SPECIFIC) 4.1 4.1.1 Belt sander/Portable belt sander  (1) 4.1.2 If no personal safety equipment is worn:  Dust and debris can cause eye and body injuries.   Dust may damage your lungs.   Dust and debris may damage clothes.  Loose clothing can be caught in moving parts of the machine and cause injury. ANY TWO OF THE ABOVE (2) 4.1.3 Prevent machine from being damaged by:  corrosion/rust/dust/dirt   moisture. ANY ONE OF THE ABOVE (1) 4.2 4.2.1 Adjusting the height of the table of the thickness planer while in operation:  Can cause injury to the operator.   Can cause the wood to get stuck in the thickness planer.   Can put unnecessary strain on the thickness planer.  Thickness planer will stops working.  Thickness planer can be damaged. ANY TWO OF THE ABOVE (2) 4.2.2  Ensure that timber is free from metal objects before planing commenced.   Make sure the blades are sharp.   Ensure that the blade is properly fastened. ANY TWO OF THE ABOVE (2) 4.3 Different types of roof underlay: 4.3.1 Polypropylene/Plastic membrane  (1) 4.3.2 Aluminium foil or any other fireproof material  (1) 4.3.3 A synthetic/plastic membrane or metal waterproofing membrane  (1) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 12 DBE/November 2020 SC/NSC – Marking Guidelines 4.4   VALLEY  ASSESSMENT CRITERIA MARK Inclined roof on top 1 Valley 1 Inclined roof on left 1 TOTAL: 3 (3) 4.5 Eaves are closed because:  it provides a more attractive finish.   it prevents birds from nesting in the roof.  beam filling is not compulsory. ANY ONE OF THE ABOVE (1) 4.6 Fibre cement board is water resistant.  (1) 4.7 4.7.1 Concrete roof tiles are:  quite prone to chemical weathering.   fragile and must be handled with care.   heavier than most other roofing materials.  not always uniform in colour.  not able to resists extreme weather conditions.  more expensive.  more labour intensive.  porous at times. ANY TWO OF THE ABOVE (2) 4.7.2 Thatch roofs:  are extremely vulnerable to fire and must be treated with fire proof chemicals before use.   are more expensive to install than other roof covering.  demands more maintenance.  are susceptible to decay because thatch is an organic material.  need re-thatching of the ridge capping every four to six years. ANY TWO OF THE ABOVE (2) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 13 DBE/November 2020 SC/NSC – Marking Guidelines 4.7.3 Corrugated roof sheeting:  Sharp edges can be dangerous.   If sheets are too thin, they may bend when stepped upon.   The sheets can rust along the edges if they have been cut using an angle grinder. ANY TWO OF THE ABOVE (2) 4.8 The trapdoor framework must be secured to the:  Tie beam   Brandering  (2) 4.9 Mechanical graded timber:  Indicates the quality/strength of timber.   Undergone mechanical tests using machines.   Machine stress- grading is highly effective and more accurate than visual grading.  It provides a reliable and consistent method of grading timber.  Mechanically graded timber is most commonly used in engineered connector plate roof trusses.  Mechanically graded timber is easily available because the process is faster. ANY TWO OF THE ABOVE (2) 4.10 Timber must be preserved:  to enhance the appearance of timber.   to prevent fungi growth.   to prevent fungal discolouration of timber.  to prevent insect attacks.  to protect it from the elements of the nature.  to prevent shrinkage and warping.  so that projects have a tough, durable, water-resistant and clear finish.  to bring out the grain of the timber.  to make it resistant to water, heat, stains and scratches.  extend the lifespan of the timber.  because it takes time to decay. ANY TWO OF THE ABOVE (2) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 14 DBE/November 2020 SC/NSC – Marking Guidelines 4.11 Application of scale  KING POST 114 X 38 mm  WALL PLATES 114 X 38 mm      TIE BEAM 114 X 38 mm SPAN OF 4 000 MM 220 mm WALL   220 mm WALL WITH INSIDE WITH INSIDE Correctness of drawing  ASSESSMENT CRITERIA MARK 220 mm walls with inside span of 4 000 mm 2 Wall plates 114 x 38 mm 2 Tie beam 114 x 38 mm 1 Rafters 114 x 38 mm 2 King post 114 x 38 mm 1 Correctness of drawing 1 Application of scale ONE or TWO incorrect =3 THREE or FOUR incorrect = 2 3 More than FIVE incorrect =1 NO measurements correct = 0 TOTAL: 12 (12) [40] Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 15 DBE/November 2020 SC/NSC – Marking Guidelines QUESTION 5: CENTRING, FORMWORK, SHORING AND GRAPHICS AS MEANS OF COMMUNICATION (SPECIFIC) 5.1 A – Rib  B – Tie/Opening between ribs C – Lagging  D – Bearer  E – Horizontal brace/Strut  (5) 5.2 An adjustable steel prop is preferred because…  it is stronger than a wooden prop.   it can be adjusted much easier than a wooden prop.  it can provide a much more accurate height adjustment during installation. ANY ONE OF THE ABOVE (1) 5.3 5.3.1 Double flying shore/Flying shore/Raking shore  (1) 5.3.2 A – Folding wedges: Allow the raising or lowering of the dead shore to the required height.  (1) 5.3.3 Steel dogs:  are used to secure the joint between soleplate/needle and dead shore.   help to keep the construction more rigid/stable/firm. ANY ONE OF THE ABOVE (1) 5.4 No Mistakes in the construction of Possible solutions to rectify the dead shore the mistakes 1 The needle is not secured by Secure with steel dog.  means of a steel dog  2 The dead shores have no Sole plates should be installed at soleplates.  the bottom of the dead shores. 3 No folding wedges. Folding wedges should be placed under the dead shores. 4 The needle do not rest properly Move dead shore to the left and on the dead shore on the right secure needle properly on dead side. shore. 5 Needle is not level. Set needle level. 6 No brace between the needle and Secure a brace between the the dead shore. needle and dead shore. ANY TWO MISTAKES WITH THE CORRESPONDING SOLUTIONS OF THE ABOVE OR ANY OTHER (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 16 DBE/November 2020 SC/NSC – Marking Guidelines 5.5 Differentiate between a couple roof truss and a collar-tie roof truss.  RIDGE BEAM  RAFTER  WALL COUPLE ROOF TRUSS Correctness of drawing  ASSESSMENT CRITERIA – COUPLE ROOF MARK Walls 1 Rafters 1 Ridge beam 1 Correctness of drawing 1 TOTAL: 4 (4)  RIDGE BEAM COLLAR BEAM  RAFTER  WALL COLLAR-TIE ROOF TRUSS Correctness of drawing  ASSESSMENT CRITERIA – COLLAR-TIE ROOF MARK Rafters 1 Collar beam 1 Ridge beam 1 Correctness of drawing 1 TOTAL: 4 (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 17 DBE/November 2020 SC/NSC – Marking Guidelines 5.6 CROSS BEARER SOFFIT/SHUTTER BOARD   BEARER    WALL  PROP FOLDING  WEDGES  SOLEPLATE Correctness of drawing  ASSESSMENT CRITERIA MARK Soffit/Shutter board 1 Bearer 1 Cross bearer 1 Prop 1 Folding wedges 1 Soleplate 1 Any TWO labels 2 Correctness of drawing 1 TOTAL: 9 (9) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 18 DBE/November 2020 SC/NSC – Marking Guidelines QUESTION 6: SUSPENDED FLOORS, STAIRCASES, IRONMONGERY, DOORS AND JOINING (SPECIFIC) 6.1 6.1.1 B (1) 6.1.2 A (1) 6.1.3 D (1) 6.1.4 C (1) 6.1.5 D (1) 6.2 A - Wall plate  B - Floor joist  C - Brick pier  D – Bearer  (4) 6.3 The concrete base must be wider than the brick pier in order to distribute the load imposed on it to the ground.  (1) 6.4    FLOOR JOIST STRUT (3) 6.5 Ant guards are made from galvanized steel so that it will not rust or corrode. (1) 6.6  Cut cupboard – bolts move in a horizontal direction.   Drawer/till locks – bolts move in a vertical position.  (2) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 19 DBE/November 2020 SC/NSC – Marking Guidelines 6.7 RAISED PANELS    LOCK RAIL CLEARANCE/OPENING FOR  SHRINKAGE AND EXPANSION  STILE Correctness of drawing  ASSESSMENT CRITERIA MARK Raised panels 2 Lock rail 1 Clearance/opening for shrinkage and expansion 2 Correctness of drawing 1 TOTAL: 6 (6) 6.8 A - Haunch B - Rail/Top rail C - Open tenon/Tenon D - Stile (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 20 DBE/November 2020 SC/NSC – Marking Guidelines 6.9 6.9.1  BRACE A A FIGURE 6.9 ASSESSMENT CRITERIA MARK Brace 1 TOTAL: 1 (1) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Woodworking 21 DBE/November 2020 SC/NSC – Marking Guidelines 6.9.2 BRACE  V TONGUE AND GROOVE BATTEN    HATCHING BOTTOM RAIL STYLE  ASSESSMENT CRITERIA MARK V tongue and groove batten 1 Brace 1 Bottom rail 1 Hatching 1 Arrow indicating the style 1 TOTAL: 5 (5) 6.10  110 mm WALL     THREE TREADS ON BOTH OR OR SIDES OF THE LANDING    LANDING TWO NEWEL POSTS ASSESSMENT CRITERIA MARK 110 mm wall 1 Three treads on both sides of the landing 2 Landing 1 Handrail 1 TWO newel posts 2 Arrow – indicating the rise of the staircase 1 TOTAL: 8 (8) [40] TOTAL: 200 Copyright reserved