Civil Technology Grade 12 NSC November 2022 Memo (English)

Downloaded from hlayiso.com GRAAD 12 NATIONAL SENIOR CERTIFICATE GRADE 12 CIVIL TECHNOLOGY: CONSTRUCTION NOVEMBER 2022 MARKING GUIDELINES MARKS: 200 These marking guidelines consist of 20 pages. Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 2 DBE/ November 2022 NSC – Marking Guidelines INSTRUCTIONS FOR THE MARKERS 1. Markers should:  Familiarise themselves with the question and answer before evaluating responses from candidates.  Always interpret the responses of the candidates within the context of the question.  Consider any relevant and acceptable answer during pre-marking but should strictly adhere to the answers after finalisation of the marking guideline.  There are TWO approaches to answering questions; these are (1) to explain and (2) to describe. 1. If a candidate is required to explain a process in a specific number of steps, only the first required number of responses should be considered. 2. However, if for example a candidate is required to explain or describe a process, we need to consider that candidates may write a long description, not necessarily well organised. In this case the marker needs to evaluate the complete statement to judge if the candidate explained the required outcome satisfactorily and allocate marks on merit.  Mark what the candidate wrote and do not interpret or predict responses.  Indicate the tick or cross right at the position where the mark needs to be awarded or where the candidate made the error.  Accept the letter corresponding with the correct answer as well as the answer written in full in multiple-choice or similar questions.  Accept incorrect spelling in answers unless the spelling changes the meaning of the answer.  If a learner writes two or more answers separated by a slash (/) mark only the first response, unless the additional answer/s are different names for the same item e.g., Yale lock/Night latch. In this case, the answer for the response should be awarded and the slash (/) should NOT be considered as an additional answer. 2. For calculations:  A mark is only awarded if the correct unit is written next to the answer. If the question states that the answer must be in a specific unit, a mark will ONLY be awarded if the answer has the correct unit as indicated in the question.  Marks will only be allocated for the correct values if the candidates add are instead of multiply. NO marks will be awarded for the calculations and the answer.  Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 3 DBE/November 2022 NSC – Marking Guidelines  Where an incorrect answer is correctly carried over, the marker must recalculate the values, using the incorrect answer from the first calculation. If correctly used, the candidate should receive the full marks for subsequent calculations.  Alternative methods of calculations must be considered, provided that the correct answer is obtained.  For the calculation of quantities marks will be awarded for the correct use of the dimension paper. 3. When marking drawings:  The member for which the mark should be awarded must be drawn correctly in the correct position to receive a mark.  A member incorrectly drawn but wrongfully repeated in another position will be awarded the mark for the repeated incorrect member provided that the marking guideline provide for TWO or more marks for that member (positive marking).  Marks can only be awarded for a label if the label is correctly indicating the correct member that was drawn. Do not consider labels for members that were provided with labels on the answer sheet.  Scale drawings should always be marked using an appropriate mask.  If the incorrect/wrong drawing was drawn, the candidate can be awarded for only what was provided for on the marking guideline.  If a two-dimensional drawing is required and a line diagram/pictorial/isometric drawing is drawn, members will be marked according to the assessment criteria and no marks will be awarded for the correctness of the drawing.  If candidates draw/give more information than what is required, mark strictly according to the assessment criteria.  The marks for the correctness of the drawing will only be awarded if the entire drawing with all members/parts is correctly drawn. 4. Incorrect numbering of questions:  If a candidate numbered an answer incorrectly, but the answer is in the correct position according to the sequence of the questions in the question paper, circle the incorrect numbering and mark the response.  If questions were answered randomly not following the same sequence as in the question paper and the learner numbered incorrectly, the response should NOT be marked. Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 4 DBE/November 2022 NSC – Marking Guidelines 5. Duplication of responses and questions answered in the incorrect place:  If a question is answered twice, mark the first response.  If a question should be answered on an answer sheet and the candidate answered it on both the answer sheet and in the answer book, mark the response on the answer sheet and cancel the response in the answer book.  If the question was answered in the answer book instead of on the answer sheet, mark the response in the answer book according to the assessment criteria on the marking guideline. Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 5 DBE/November 2022 NSC – Marking Guidelines QUESTION 1: OHSA, MATERIALS, TOOLS, EQUIPMENT AND JOINING (GENERIC) 1.1 1.1.1 Oil or water-based paint  (1) 1.1.2 Increases the strength of concrete  (1) 1.1.3 Electrolysis  (1) 1.1.4 Plastic  (1) 1.1.5 Zinc  (1) 1.2 1.2.1  50º/50 degrees   38°/38 degrees  42°/42 degrees ANY ONE OF THE ABOVE (1) 1.2.2  Ensures stair rails/handrails/railings and or balustrades are in place   Keep treads free of dangerous obstacles  Keep treads free of protruding nails  Post warning signs  Ensure there is sufficient lighting  Ensure the surface is not slippery ANY ONE OF THE ABOVE (1) 1.2.3  To keep concrete in position   To enable the filling of concrete  To act as formwork  To shape the treads ANY ONE OF THE ABOVE (1) 1.3 When transporting/carrying long ladders:  Ensure that it does not protrude excessively   Tie a red or orange flag/warning signs to the end of the ladder   Ensure that the ladder is firmly secured to the vehicle  Protect the ladder during transportation or while carrying it  Two people should carry the ladder  It should be carried horizontally and on the same side ANY TWO OF THE ABOVE (2) 1.4  Safety net/Net   Catch platform ANY ONE OF THE ABOVE (1) 1.5 Brace/Strut  (1) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 6 DBE/November 2022 NSC – Marking Guidelines 1.6 If the scaffold planks protrude more than 230 mm beyond the last support:  The scaffold planks might tilt if worker steps on it   The worker might fall from scaffold  It might be hazardous to workers working around the scaffold ANY ONE OF THE ABOVE (1) 1.7 3 m/3 000 mm  (1) 1.8   OR OR HOOK   OR EYE (4) 1.9 1.9.1 Multi-detector  (1) 1.9.2 Laser level/Spirit level/Transparent pipe level  (1) [20] Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 7 DBE/November 2022 NSC – Marking Guidelines QUESTION 2: GRAPHICS AS MEANS OF COMMUNICATION (GENERIC) NO. QUESTIONS ANSWERS MARKS Ground floor: B/FIGURE B  FIGURE B shows: No roofline/ Name the FIGURE that represents the Roofline in FIGURE A/ 1 ground floor. Give ONE reason for Garage/Arrows on the 2 your answer. staircase/Ramp/Door at lounge/Entrance door/Garage door/ Balcony in FIGURE A  Deduce the scale that was used to 2 draw the floor plan of the house from 1:100  1 the given building plan. 3 Identify number 1. Landing  1 4 Identify number 4. Balcony/Cantilever  1 5 Identify number 5. Shower  1 Wash hand basin/Wash 6 Identify number 6. 1 basin/Basin/WHB  Give the abbreviation for the symbol at 7 WC  1 number 7. 8 Identify number 8. Ramp  1 9 Identify number 9. Roll-up door/Garage door  1 10 Identify number 10. Fluorescent light  1 Identify the number that indicates the 11 No 11/11  1 wall mounted light. Give the abbreviations for the following: FFL  12 2  Finished floor level NGL   Natural ground level Name a suitable material that can be Concrete/Wood/Aluminium/Steel/ 13 1 used for constructing number 2. Masonry/Bricks/Glass  Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 8 DBE/November 2022 NSC – Marking Guidelines Coffee nook/Kitchen/Playroom/ Private lounge/Office/TV room/ Recommend ONE use for the area 14 Bar/Dining room/Storage space/Any 1 indicated by number 3. use with utility value  Recommend ONE permanent fixture Built-in cupboard/BIC/Cupboard/ 15 for bedroom 1 that can be used for Closet/Bookshelf/Desk/ 1 storage. Drawer unit  Who is the architect that was 16 HB Nel  1 responsible for the drawing? Describe what is indicated by the 17 Direction of the rise of the stairs  1 arrows on the staircase in FIGURE B. Revision 1 – Drawing of sanitary State what was done during revision 1 fitments  18 2 and revision 2 of the house plan. Revision 2 – Drawing of staircase  Deduce the reference code from the 19 QP 6 – 2022  1 building plan. Who must be notified when a 20 contractor sets out levels on a site and Architect/HB Nel  1 there are variances? Ceiling light/Light/Light switch/ Identify ONE important fixture that is 21 Switch/Fan light/Extractor fan/ 1 omitted in the bathroom. Bath/Bidet/Socket outlet/Cabinet  22 Draw the symbol for face brick.  2 23 Draw the electrical symbol for earth.  2 Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 9 DBE/November 2022 NSC – Marking Guidelines 24 Draw the symbol for a grease trap.  2 Total vertical dimensions: Control test left Control test right 220  2 960  5 450  110  220  2 820  5 890 = 5 890  Prove by means of a control test that the total vertical dimensions on the left OR 25 Left side: 7 and right of the plan in FIGURE B are equal. 220 + 5 450 + 220 = 5 890 mm Right side: 2 960 + 110 + 2 820 = 5 890 mm Note: If the alternative method is used, one mark should be allocated if both totals are the same. = 5,89  m x 8,11 m = 47,77 m² Calculate the area of the first floor. OR 26 Show ALL calculations. Give your 3 answer in m². = 5 890 mm x 8 110 mm = 47,77 m² (47,7679 m2/47,8 m2/48,0 m2) TOTAL: 40 Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 10 DBE/November 2022 NSC – Marking Guidelines QUESTION 3: ROOFS, STAIRCASES AND JOINING (SPECIFIC) 3.1 Fibre cement tiles/Thatch  (1) 3.2 4 metres  (1) 3.3 Securing a wall plate to a wall:  Timber bolted/Rawl bolted to the top of the wall   Nailed to the wall   Screwed to the wall  A galvanised strap/hoop iron nailed or built into a wall  Tie with roof wire that is built into wall  Secure with a tie/strap ANY TWO OF THE ABOVE (2) 3.4 A - Pre-drilled hole filled with grout/Baluster fixing onto the tread  B - Bolts/Rawl bolts/Plastic plugs with screws/Screws used to secure baluster/Baluster fixed onto the side of the string  (2) 3.5 LANDING 5 4 BALUSTER 3 RISER 3 5 2 4 HANDRAIL TREAD/GOING CORRECTNESS OF STAIRCASE: 1 NO. ASSESSMENT CRITERIA MARK 1 Correctness of staircase 1 2 Landing 1 3 Flight of stairs (steps) 2 4 Balusters 2 5 Handrail 2 TOTAL: 8 (8) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 11 DBE/November 2022 NSC – Marking Guidelines 3.6 5 5 RIDGE BEAM RAFTER 4 4 WALL PLATE 3 3 6 6 2 2 2 SPAN WALL APPLICATION OF SCALE: 7 7 7 1 1 CORRECTNESS OF ROOF TRUSS: USE A MASK TO MARK THIS QUESTION NO. ASSESSMENT CRITERIA MARK 1 Correctness of roof truss 2 2 Walls and span 3 3 Wall plates 2 4 Rafters 2 5 Ridge beam 2 6 Overhang 2 Application of scale: ONE or TWO incorrect =3 7 THREE or FOUR incorrect = 2 3 More than FIVE incorrect = 1 TOTAL: 16 (16) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 12 DBE/November 2022 NSC – Marking Guidelines QUESTION 4: EXCAVATIONS, FORMWORK, TOOLS, EQUIPMENT AND MATERIALS (SPECIFIC) 4.1 4.1.1 A (1) 4.1.2 C (1) 4.1.3 E (1) 4.1.4 G (1) 4.1.5 D (1) 4.1.6 J (1) 4.1.7 B (1) 4.1.8 F (1) 4.2   WEDGE    FOLDING WEDGES  (6) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 13 DBE/November 2022 NSC – Marking Guidelines 4.3.1 Apparatus for the slump test:  Open cone/Cone/Mould   Square base/Base plate   Tamping rod/Rod  Ruler  Tape measure  Spirit level/Straight edge  Shovel/Scoop/Trowel ANY TWO OF THE ABOVE (2) 4.3.2  COLLAPSED SLUMP (2) 4.3.3 Collapsed slump:  Too much water is added to the mixture   Concrete not mixed well ANY ONE OF THE ABOVE (1) 4.4.1 Power trowel float/Power float/Power trowel  (1) 4.4.2 Taking care of the machine:  Maintain all the machinery   Lubricate/Oil and adjust to manufacturer’s instructions   Store in a safe dry place  Repair or replace damage parts  Service the machine regularly  Clean the machine after use ANY TWO OF THE ABOVE (2) 4.4.3 Safety aspects of the machine:  Operate with care   Wear appropriate PPE   Never use a defective machine  Do not place your hands and feet near moving parts  Avoid making any adjustments while the machine is moving  Use both hands to operate the machine  Ensure a well-balanced stance ANY TWO OF THE ABOVE (2) 4.5 28 days  (1) 4.6 Perspex  (1) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 14 DBE/November 2022 NSC – Marking Guidelines 8 4.7 TIE CLEATS 2 2 SHUTTER BOARD SIDES 7 7 BRACE/STRUT 4 4 WEDGE 6 6  3 5 FIXING PLATE 5 BEARER/HEADTREE SOFFIT BOARD/ SHUTTER BOARD BRACE/STRUT PROP/STRUTS CORRECTNESS OF FORMWORK: 1 1 NO. ASSESSMENT CRITERIA MARK 1 Correctness of formwork 2 2 Shutter board sides 2 3 Soffit board 1 4 Cleats 2 5 Fixing plates 2 6 Wedges 2 7 Brace/Struts 2 8 Tie 1 TOTAL: 14 (14) [40] Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 15 DBE/November 2022 NSC – Marking Guidelines QUESTION 5: PLASTER AND SCREED, BRICKWORK AND GRAPHICS AS MEANS OF COMMUNICATION (SPECIFIC) 5.1 Tyrolean machine  (1) 5.2 5.2.1 A- Straight edge/Straight plank  B- Clamp  C- Brick/Wall  (3) 5.2.2 Reveals are exposed to more movement and rough handling.  (1) 5.2.3 Trowel/External corner trowel/Corner trowel  (1) 5.3 2 NOTE: RIBS CAN ALSO BE CLOSED LAGGINGS DRAWN INSTEAD OF FORMWORK BOARD 2 FORMWORK BOARD 3 CORRECTNESS OF WOODEN TURNING PIECE/CENTRE: 1 NO ASSESSMENT CRITERIA MARK 1 Correctness of wooden turning piece/centre 1 2 Closed laggings (No space between laggings) 2 3 Formwork board 1 TOTAL: 4 (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 16 DBE/November 2022 NSC – Marking Guidelines 5.4 5 HEADER COURSE 6 7 WALL TIE 4 3 3 WEEP HOLE DPC 2 LINTEL ABOVE WINDOW APPLICATION OF SCALE: 8 8 CORRECTNESS OF CAVITY WALL: 1 USE A MASK TO MARK THIS QUESTION NO. ASSESSMENT CRITERIA MARK 1 Correctness of cavity wall 1 2 Weep hole 1 3 DPC 2 4 Wall tie 1 5 Header course 1 6 Outer wall 1 7 Inner wall 1 Application of scale: ONE or TWO incorrect =2 8 2 THREE or FOUR incorrect = 1 More than FIVE incorrect = 0 TOTAL: 10 (10) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 17 DBE/November 2022 NSC – Marking Guidelines 5.5 3 3 3 3 CORRECTNESS OF COURSE: 1 2 2 2 2 CORRECTNESS OF COURSE: 1 NO. ASSESSMENT CRITERIA MARK 1 Correctness of courses 2 2 First course 4 3 Second course 4 TOTAL: 10 (10) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 18 DBE/November 2022 NSC – Marking Guidelines QUESTION 6: REINFORCEMENT IN CONCRETE, FOUNDATIONS, CONCRETE FLOORS AND QUANTITIES (SPECIFIC) 6.1 6.1.1 B (1) 6.1.2 C (1) 6.1.3 B (1) 6.1.4 D (1) 6.1.5 D (1) 6.2 6.2.1 Three mistakes:  There should be holes in the block   The rib has no reinforcing   There is no reinforcing mesh   The block is not resting more than halfway on the wall  The outer skin of the wall should be higher  Members are too far from one another ANY THREE OF THE ABOVE (3) 6.2.2 Prop/Post/Pole  (1) 6.3 2 STEEL CABLE 3 DROP HAMMER 4 CORRECTNESS OF TOOL: 1 NO ASSESSMENT CRITERIA MARK 1 Correctness of tool 1 2 Steel cable 1 3 Drop hammer 1 4 Any ONE label 1 TOTAL: 4 (4) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 19 DBE/November 2022 NSC – Marking Guidelines 6.4 6.4.1 Pile foundation  (1) 6.4.2 Strip foundation  (1) 6.5 6.5.1 A - Stirrup  B - Concrete/Concrete symbol (2) 6.5.2 40 mm  (1) 6.5.3 Methods of joining steel bars:  Crosswise method   Hair knot method   Crown method ANY TWO OF THE ABOVE (2) 6.5.4 Ribbed bars ensure better bonding with the concrete (1) 6.5.5 2 3 CORRECTNESS OF SHEAR FORCE: 1 SHEAR FORCE THAT ACTS ON A STRUCTURE NO ASSESSMENT CRITERIA MARK 1 Correctness of shear force 1 2 Downward force 1 3 Upward force 1 TOTAL: 3 (3) 6.5.6   MAIN BAR   ANCHOR BAR (4) 6.6 6.6.1 Shear bar  (1) 6.6.2 Helps to counteract shear force/This is where the shear force is exerted the most  (1) Copyright reserved Please turn over

Downloaded from hlayiso.com Civil Technology: Construction 20 DBE/ November 2022 NSC – Marking Guidelines 6.7 Correct use of dimension paper  (1) A B C D Centre line of external wall: 2/9 000  = 18 000 mm  2/5 000  = 10 000 mm  Total = 28 000 mm  Minus 4/220  = 880 mm  Total centre line = 27 120  mm  OR = 27,12 m (9) [40] TOTAL: 200 Copyright reserved