Civil Technology Grade 11 Eastern Cape November 2015 QP

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE GRADE 11 NOVEMBER 2015 CIVIL TECHNOLOGY MARKS: 200 TIME: 3 hours This question paper consists of 12 pages, including 2 answer sheets and a formula sheet.

Downloaded from hlayiso.com 2 CIVIL TECHNOLOGY (EC/NOVEMBER 2015) REQUIREMENTS 1. ANSWER BOOK 2. Drawing instruments 3. A non-programmable pocket calculator INSTRUCTIONS AND INFORMATION 1. This question paper consists of SIX questions. 2. ALL questions are COMPULSORY. 3. Answer each question as a whole. Do NOT separate sub-questions. 4. Start EACH question on a NEW page. 5. Sketches may be used to illustrate your answers. 6. ALL calculations and written answers must be done in the ANSWER BOOK. 7. Use the mark allocation as a guide to the length of your answers. 8. Drawings and sketches must be done in pencil, fully dimensioned and neatly finished off with titles and labels to conform to SANS (SABS) Recommended Practice for Building Drawings. 9. Use your discretion where dimensions and/or details have been omitted. 10. Answer QUESTION 5.2 and QUESTION 6.1 on the ANSWER SHEETS provided. Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2015) CIVIL TECHNOLOGY 3 QUESTION 1: CONSTRUCTION PROCESSES 1.1 What is the purpose of the following bars in a reinforced concrete beam? 1.1.1 Main bars (1) 1.1.2 Anchor bars (Compression bars) (1) 1.1.3 Shear bars (1) 1.1.4 Stirrups (2 x 1) (2) 1.2 Briefly describe the purpose of the bar schedule which is sent to the steel fixing company. (2) 1.3 Describe FOUR aspects of mounted steel reinforcement which must be checked before the concrete is cast. (4 x 2) (8) 1.4 Which type of load causes lateral forces in a column? (1) 1.5 Name TWO advantages of using metal as formwork material. (2 x 1) (2) 1.6 Identify the parts 1.6.1 to 1.6.6 of the formwork in FIGURE 1.6. (6 x 1) (6) FIGURE 1.6 1.7 Briefly describe the manufacturing process of a prestressed concrete lintel. (3) 1.8 Name THREE advantages of prestressed concrete lintels. (3 x 1) (3) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com 4 CIVIL TECHNOLOGY (EC/NOVEMBER 2015) QUESTION 2: ADVANCED CONSTRUCTION PROCESSES 2.1 Make a neat sketch in good proportion of a half brick wall and indicate the following: 2.1.1 FIVE brick layers (1) 2.1.2 Stretcher bond (1) 2.1.3 Dead end at the left hand-side (1) 2.1.4 Raking back at the right hand-side (2) 2.2 Briefly describe the purpose of the line blocks in the construction of brick walls. (2) 2.3 Briefly describe the purpose of the wall plate in a roof construction. (2) 2.4 Indicate whether the following statements are TRUE or FALSE. Write only the word TRUE or FALSE next to the number in the ANSWER BOOK. 2.4.1 Horisontal dagha joints are called bed joints. (1) 2.4.2 Brick force is a wire net of galvanised steel. (1) 2.3.3 Beam filling is a wooden beam to which roof tiles are fixed. (1) 2.4.4 Lugs are used to bind the leaves of cavity walls. (1) 2.4.5 Damp proofing in outer walls must be at least 50 mm from the ground level. (1) 2.5 Briefly motivate why a cavity wall must have a weep-hole opening. (2) 2.6 Briefly describe the principles responsible for the retaining function of the precast concrete retaining structures. (2) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2015) CIVIL TECHNOLOGY 5 2.7 Answer the following questions with regard to the shoring construction in FIGURE 2.7: FIGURE 2.7 2.7.1 What is the advantage of this type of shoring? (1) 2.7.2 Name FIVE factors which will influence the type of design for the shoring. (5 x 1) (5) 2.7.3 Name the parts 2.7.A and 2.7.B. (2) 2.8 Which type of tool will be used for the following type of work? 2.8.1 To test whether floors have been horizontally casted (1) 2.8.2 To hold plaster up for plaster work (1) 2.8.3 To run multiple grooves next to each other in concrete floors (1) 2.8.4 To wet the plastering during the floating process (1) 2.8.5 To cut various profiles in wood for edge cutting work (1) 2.9 Describe THREE safety measures which are applicable when working with the thicknesser. (3 x 2) (6) 2.1 Name THREE measures which must be applied when a worker sustains a neck 0 injury. (3 x 1) (3) [40] Copyright reserved Please turn over

Downloaded from hlayiso.com 6 CIVIL TECHNOLOGY (EC/NOVEMBER 2015) QUESTION 3: CIVIL SERVICES 3.1 Briefly motivate why a pressure control valve must be installed in a geyser by referring to purposes of the pressure control valve. (3) 3.2 Which valve protects the geyser against vacuum collapse? (1) 3.3 Briefly motivate why each geyser must be supplied with a safety tray. (2) 3.4 Indicate whether the following statements are TRUE or FALSE. Write only the word TRUE or FALSE next to the number in the ANSWER BOOK. 3.4.1 Soil water is discharged in a gully. (1) 3.4.2 The section size of sink discharge pipes is 50 mm. (1) 3.4.3 The angle of drain bends is 90º. (1) 3.4.4 Traps are used at the outlet of geysers. (1) 3.4.5 A water closet is connected to a 110 mm drain pipe. (1) 3.4.6 The purpose of a water lock is to prevent the waste water from pushing up into the wall fittings. (1) 3.5 What is the purpose of a ball valve and where will it be found? (2) 3.6 Name FOUR places where manholes are installed in a drain system. (4 x 1) (4) 3.7 What is the purpose of rodding eyes in a drain system? (1) 3.8 Briefly motivate why drains must be laid in a straight line. (2) 3.9 Make a neat sketch to illustrate the construction of a backdrop system. Also indicate the position of the rodding eye. (4) 3.10 What is the maximum pitch of a drain pipeline? (1) 3.11 Make neat sketches and indicate the abbreviations of the following drain symbols: 3.11.1 Vent pipe (2) 3.11.2 Gully (2) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2015) CIVIL TECHNOLOGY 7 QUESTION 4: MATERIALS AND QUANTITIES 4.1 Make neat sketches to illustrate the following steel profiles: 4.1.1 Angle iron (2) 4.1.2 Channel iron (2) 4.1.3 H-beam (2) 4.2 Name FIVE properties of coal tar creosote for wood preservation. (5 x 1) (5) 4.3 Describe the purpose of wood preservation. (2) 4.4 Briefly motivate why aluminium window frames will be used in constructions near the coast. (1) 4.5 What is the disadvantage of ferrous metals? (1) 4.6 Briefly motivate why a designer must know the properties of metals when designing structures. (2) 4.7 Name FIVE properties of glass. (5 x 1) (5) 4.8 Briefly describe the manufacturing process of mirrors. (4) 4.9 A quantity list consists of four columns. Name the columns A, B, C and D. (4) [30] Copyright reserved Please turn over

Downloaded from hlayiso.com 8 CIVIL TECHNOLOGY (EC/NOVEMBER 2015) QUESTION 5: APPLIED MECHANICS 5.1 FIGURE 5.1 shows a beam which is supported by supports A and B. Calculate the reaction force of support A and B. (10) FIGURE 5.1 5.2 FIGURE 5.2 on sheet A shows a frame structure with pointed loads. Complete the following on sheet A: 5.2.1 The force diagram on scale 1 N = 1 mm (8) 5.2.2 The table by indicating the size and nature of the forces (8) 5.3 FIGURE 5.3 shows a beam with pointed loads. Calculate the bending moment values of point a to d. (4) FIGURE 5.3 [30] Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2015) CIVIL TECHNOLOGY 9 QUESTION 6: GRAPHICS AND COMMUNICATION 6.1 SHEET C indicates the natural ground level for a section view through a wall construction with a window. Use SHEET C and draw to scale 1 : 50 the section drawing of one wall construction of a dwelling. The following information must be indicated: 6.1.1 Scale 1 : 50 (2) 6.1.2 600 mm x 200 mm concrete foundation with the concrete symbol (3) 6.1.3 Undisturbed ground symbol (1) 6.1.4 Foundation wall (1) 6.1.5 100 mm Ground filling with the symbol (2) 6.1.6 100 mm Concrete floor with the symbol (2) 6.1.7 Damp-proof layer under the floor (1) 6.1.8 Cavity wall with hatching (3) 6.1.9 Damp proof layer in the cavity wall (2) 6.1.10 2,6 m Wall height from floor level to the ceiling (1) 6.1.11 Window sill (1) 6.1.12 900 mm window (1) 6.1.13 Window lintel (1) 6.1.14 Window damp-proof layer (1) 6.1.15 Beam filling (1) 6.1.16 114 x 38 mm Wall plate (1) 6.1.17 114 mm Tie beam and rafter with a 30º roof pitch (2) 6.1.18 Bottom two 38 x 38 mm purlines with tiles (2) 6.1.19 Line work and neatness (2) 6.2 Make neat sketches to illustrate each of the following symbols: 6.2.1 Inner door (2) 6.2.2 Stairs (2) 6.2.3 Wall light (2) 6.2.4 Fluorescent light single (2) 6.2.5 Manhole (2) [40] TOTAL: 200 Copyright reserved Please turn over

Downloaded from hlayiso.com 10 CIVIL TECHNOLOGY (EC/NOVEMBER 2015) ANSWER SHEET CIVIL TECHNOLOGY NAME: ANTWOORDBLAD A SIVIELE TEGNOLOGIE NAAM: QUESTION/VRAAG 5.2 (16) a SCALE/SKAAL: 1 N = 1 mm PART/DEEL STRUT/STUT TIE/STANG AF BG CH DI EI EF FG GH HI (4) Copyright reserved Please turn over

Downloaded from hlayiso.com (EC/NOVEMBER 2015) CIVIL TECHNOLOGY 11 ANSWER SHEET ANTWOORDBLAD B CIVIL TECHNOLOGY SIVIELE TEGNOLOGIE NAME: NAAM: QUESTION/VRAAG 6.1 (30) Correct scale 2 Foundation + Symbol 3 Undisturbed ground symbol 1 Foundation wall 1 Ground filling symbol 2 Concrete floor + Symbol 2 Floor DPC 1 Cavity wall + Hatching 3 Wall DPC 2 Wall height 1 Window sill 1 Window 1 Window lintel 1 Window DPC 1 Beam filling 1 Wall plate 1 Tie beam + Rafter 2 Purlines 2 Line work/Neatness 2 TOTAL 30 NATURAL GROUND LEVEL SECTION ELEVATION SCALE 1:50 Copyright reserved Please turn over

Downloaded from hlayiso.com 12 CIVIL TECHNOLOGY (EC/NOVEMBER 2015) FORMULA SHEET IMPORTANT ABBREVIATIONS SYMBOL DESCRIPTION SYMBOL DESCRIPTION SYMBOL DESCRIPTION G Centre of gravity h Height d Diameter C Centroid b Breadth/Width r Radius L Length s Side A Area 22 𝜋 Pi = 7 = 3,142 ∅ Diameter V Volume FORMULAS FORMULA FOR THE FORMULA FORMULA POSITION OF CENTROIDS AREA OF (in words) (in symbols) X-axis Y-axis 𝑏 𝑏 Square Length x Breadth Ixb 2 2 I 𝑏 Rectangle Length x Breadth Ixb 2 2 Right-angled 𝑏 ℎ ½ x base x height ½b x h triangle 3 3 Equilateral 𝑏 ℎ ½ x base x height ½b x h triangle/ Pyramid 2 3 Circle 𝜋 x radius x radius 𝜋𝑟 2 2 𝜋 x diameter x diameter 𝜋𝑑 Centroid is in the centre Circle divided by 4 4 𝜋 x radius x radius 𝜋𝑟2 Centroid is 0,424r on the Semi-circle divided by 2 2 centre line (A1 x d) + (A2 x d) Position of centroid = Total area Copyright reserved Please turn over