Civil Technology Grade 12 IEB 2016 Question Paper

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE EXAMINATION NOVEMBER 2016 CIVIL TECHNOLOGY MARKING GUIDELINES Time: 3 hours 200 marks These marking guidelines are prepared for use by examiners and sub-examiners, all of whom are required to attend a standardisation meeting to ensure that the guidelines are consistently interpreted and applied in the marking of candidates' scripts. The IEB will not enter into any discussions or correspondence about any marking guidelines. It is acknowledged that there may be different views about some matters of emphasis or detail in the guidelines. It is also recognised that, without the benefit of attendance at a standardisation meeting, there may be different interpretations of the application of the marking guidelines. IEB Copyright © 2016 PLEASE TURN OVER

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE: CIVIL TECHNOLOGY – MARKING GUIDELINES Page 2 of 7 QUESTION 1 CONSTRUCTION, SAFETY AND MATERIAL 1.1 1.1.1 – E 1.1.2 – G 1.1.3 – I 1.1.4 – B 1.1.5 – C 1.2 Trench safety Check daily especially after rain Must be cordoned off Access and exit must be accessible Must be shored so that cave-in does not occur No vehicles or heavy machinery close to trench Warning lights placed for public safety Any FOUR or other applicable answer 1.3 1.3.1 Any 3 labels and 1 for correctness of drawing 1.3.2 Draw a neat drawing to indicate at wall end the difference between a GABLE roof and a HIPPED roof. 2 Correct drawing 2 Correct drawing IEB Copyright © 2016 PLEASE TURN OVER

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE: CIVIL TECHNOLOGY – MARKING GUIDELINES Page 3 of 7 1.4 Site safety Site should be neat and tidy Provisions for toilet facilities No unauthorized entrance onto site Site must be fenced off Warning signs in applicable places First Aid must be available Workers must wear appropriate safety clothing Any TWO or other applicable answer 1.5 1.5.1 Tapered cone, spirit level, measuring tape, tamping rod Any ONE correct 1.5.2 Used to test correct mix between ingredients Used to test correct consistency Used to test correct water volume Any ONE correct 1.5.3 Compression test To test compression strength of concrete 1.6 1. I-beam 2. Channel iron 3. H-bar/two-sided channel 1.7 1. Head plate 2. Stud 3. Panel board, Gypsum board, cladding, plywood, chipboard (any one) 4. Sole plate QUESTION 2 ADVANCED CONSTRUCTION AND EQUIPMENT 2.1 Check that blades are sharp Keep away from moisture, rust Cover cutting edges Put away in safe place and clean after use Place in tool-box Check the power cord is not frayed or damaged Any THREE or other applicable answer 2.2 2.2.1 Independent scaffold Pipe scaffold Any ONE correct 2.2.2 Bracing and used to keep scaffold secure IEB Copyright © 2016 PLEASE TURN OVER

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE: CIVIL TECHNOLOGY – MARKING GUIDELINES Page 4 of 7 2.2.3 Ensure it is on level ground Working platform can carry load Kick board in place Guard rail in place Qualified person erected scaffold No paint or rust visible Ensure tied onto structure Only workers allowed on scaffold Any TWO or other applicable answer 2.2.4 A – Guard rail B – Platform C – Kick board D – Vertical standard 2.3 2.3.1 Factors  Span  Weight of floor  Load on floor  Daily use for suspended floor  Time available for construction  Reinforcing method for floor Any THREE factors or any other applicable answer 2.3.2 Method – Precast concrete slab OR slab on corrugated iron OR reinforced slab 2.4 ANSWER BOOKLET 2.5 B – Shuttering C – Rise D – Tread E – Landing G – Wedges 2.6 Strong enough to carry load Easily nailed, screwed Reusable Not able to bond with concrete Any TWO applicable or any other applicable answer 2.7 Driven pile – Driven into soil with weight, like a nail driven into wood Precast pile – Already made up pile driven straight into the ground Drilled pile foundation – Hole is drilled by large auger drill bit and poured afterwards Any TWO applicable answers 2.8 12 – Number of bars Y – High yield/ Y-bar 12 – Diameter of bar 10 – Bar number in code 300 – Spacing of bars IEB Copyright © 2016 PLEASE TURN OVER

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE: CIVIL TECHNOLOGY – MARKING GUIDELINES Page 5 of 7 2.9 Rough arch – Plastered when finished Built with uncut bricks Mortar wedge shaped Any ONE answer or any other applicable answer Gauged arch – Built with voissoirs (purpose made bricks) Do not plaster. Any ONE answer or any other applicable answer 2.10 2.10.1 Curing of concrete – Drying, removal of water out of mix 2.10.2 Segregation of concrete – The concrete breaks apart due to mix not done properly 2.10.3 Beam filling – Bricks placed between trusses to close gap between wall and roof QUESTION 3 CIVIL SERVICES 3.1 A conservancy tank can be used in the absence of a waterborne sewerage system and where a septic tank is not viable. Make a neat, labelled sketch of the sectional view of a conservancy tank. Clearly showing the following: Inlet, outlet, valve chamber, pipe diameters and floor slope, manhole cover. Inlet chamber – 2 Conservancy tank – 1 Valve chamber – 2 Pipe ø – 1 Outlet – 1 Floor slope – 1 3.2 ANSWER BOOKLET 3.3 ADVANTAGES DISADVANTAGES Excellent coastal areas Expensive Readily available Joints laborious, difficult Durable in aciduous soil 3.4 3.4.1 Trap consists of sieve that stops food going into main drain Clean sieve and pipes can be unblocked quickly ANY other acceptable answer 3.4.2 Used: Restaurants, large kitchen ANY other acceptable answer IEB Copyright © 2016 PLEASE TURN OVER

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE: CIVIL TECHNOLOGY – MARKING GUIDELINES Page 6 of 7 QUESTION 4 QUANTITIES, MATERIALS AND JOINING 4.1 Fixatives 4.1.1 General use where nail can be visible Carpentry Crates Any ONE or other acceptable answer 4.1.2 The large head of the clout nail holds the ceiling material better 4.1.3 Use where large nail is unsuitable Use where nail must be hidden Use where wood is in danger of splitting Any ONE or other acceptable answer 4.1.4 PVC cement/glue 4.1.5 Soldering Compression fittings 4.2 Advantages of screws Does not damage the wood when inserting Easy to take out and does not damage wood, when taking out Grip is much stronger Holds longer than nails Any THREE or other acceptable answer 4.3 Incomplete cutting list 4.3.1 Description 4.3.2 Width 4.3.3 Thickness 4.4 ANSWER BOOKLET IEB Copyright © 2016 PLEASE TURN OVER

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE: CIVIL TECHNOLOGY – MARKING GUIDELINES Page 7 of 7 QUESTION 5 APPLIED MECHANICS 5.1 5.1.1 Rec 1 = 30 × 20 = 600 mm² Rec 2 = 20 × 20 = 400 mm² Rec 3 = 40 × 90 = 3 600 mm² Total = 4 600 mm² 5.1.2 CENTROID FROM AA 4 600 × X = (600 × 15) + (400 × 40) + (3 600 × 75) = 9 000 + 16 000 + 270 000 = 295 000/4 600 = 64,13 mm 5.2 ANSWER BOOKLET 5.3 RR × 5 = (3 × 0) + (4 × 1) + (5 × 3) + (4 × 4) = 0 + 4 + 15 + 16 = 35/5 RR = 7 kN RL × 5 = (4 × 1) + (5 × 2) + (4 × 4) + (3 × 5) = 4 + 10 + 16 + 15 = 45/5 RL = 9 kN QUESTION 6 GRAPHICS AND COMMUNICATION 6.1 ANSWER BOOKLET 6.2 ANSWER BOOKLET Total: 200 marks IEB Copyright © 2016