# Civil Technology Grade 12 NSC November 2020 Memo (English)

> Grade 12 Civil Technology memorandum from the NSC November Exam 2020 (English), 19 pages. Read online or download the free PDF.

- Page: https://www.hlayiso.com/library/civil-technology-nov-2020-civil-services-memo-eng/df013307-ba14-4d81-a6df-63640c2a97be
- Updated: 2026-09-27
- Subject: Civil Technology
- Grade: Grade 12
- Document type: Memorandum
- Year: 2020
- Exam period: NSC November Exam
- Curriculum: CAPS
- Pages: 19

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## About this document

Civil Technology · Grade 12 · NSC November Exam · 2020. Memorandum, 19 pages. Read online or download the PDF.

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                                     GRAAD 12

                          SENIOR CERTIFICATE/
                      NATIONAL SENIOR CERTIFICATE

                                     GRADE 12

                      CIVIL TECHNOLOGY: CIVIL SERVICES

                                  NOVEMBER 2020

                               MARKING GUIDELINES

MARKS: 200

                      These marking guidelines consist of 19 pages.

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Civil Technology: Civil Services                    2                         DBE/November 2020
                                        SC/NSC – Marking Guidelines

INSTRUCTIONS FOR THE MARKERS
   1.      Markers should:
               Familiarise themselves with the question and answer before evaluating the
                responses of 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 describe
                and (2) to explain.
                If a candidate is required to explain e.g., a process in 4 steps, only the first 4
                responses should be considered.
                If, however a candidate is required to e.g., explain or describe how to
                transfer heights from one point to another using a transparent pipe level we
                need to consider that candidates may write a long description not
                necessarily well organised as an intellectual response may do. 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. The marker should apply his/her professional judgement with
                these types of questions.
               Mark what the candidate wrote and do not award marks for answers that the
                marker thinks the candidate meant with what was written.
               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 questions.
               Accept incorrect spelling in one-word answers unless the spelling changes
                the meaning of the answer.

   2.      For calculations:
               A mark is only awarded if the correct unit is written next to the answer.
               If TWO marks are awarded ONE mark is awarded for the answer and ONE
                mark for the correct unit.
               Where the candidate made a principle error e.g. added instead of
                multiplying, no marks will be awarded for the steps. If the answer is correct
                according to what the candidate did, the mark for the answer can be
                awarded for the application of skills.
               Where an incorrect answer could be carried over to the next step, the first
                answer will be deemed incorrect. However, should the incorrect answer be
                carried over correctly, the marker has to recalculate the values, using the
                incorrect answer from the first calculation. If correctly used, the candidate
                should receive the full marks for subsequent calculations.
               Markers should consider when and where a candidate has rounded off in a
                calculation, as well as the subsequent effect it has on the final answer
                obtained. The calculation should therefore be awarded marks on merit.
               Alternative methods of calculations must be considered, provided that the
                correct answer is obtained.

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Civil Technology: Civil Services              3                            DBE/November 2020
                                   SC/NSC – Marking Guidelines

   3.      When marking drawings:

               The member for which the mark should be awarded should 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.
               Scale drawings should always be marked using an appropriate mask.

           When a candidate drew the wrong drawing e.g.:

               A horizontal section instead of a vertical section, no marks will be allocated
                to the drawing as the candidate did not respond to the expected outcome.
               An orthographic view instead of sectional view, no marks will be allocated to
                the drawing as the candidate did not respond to the expected outcome.
               An orthographic view instead of an isometric view, no marks will be
                allocated to the drawing as the candidate did not respond to the expected
                outcome.
               If the incorrect drawing was drawn, the candidate can be awarded for only
                what was asked but mark/s for the correctness of the drawing will not be
                awarded e.g., if a King Post roof truss was asked in the question, and
                candidate drew SA-Howe Truss

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Civil Technology: Civil Services              4                          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)

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Civil Technology: Civil Services                5                         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]

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    Civil Technology: Civil Services                6                            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 
                                                    The gutter is fixed against it. 
            Describe the purpose of number
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              Hand 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.

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 Civil Technology: Civil Services              7                           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/connection
21       What does the line between            Wiring/Wiring from light switch to
                                                                                                   1
         numbers 13 and 14 represent?          light/Shows which switch operates which
                                               electrical fitting
                                               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.
         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

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 Civil Technology: Civil Services              8                         DBE/November 2020
                                    SC/NSC – Marking Guidelines

         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.
30                                             = 7,06 m 
                                                                                                 6
                                               OR

                                               220 + 3 000 + 110 + 3 510 + 220
                                               = 7 060 mm
                                               = 7,06 m
                                                                                 TOTAL:          40

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Civil Technology: Civil Services                9                  DBE/November 2020
                                     SC/NSC – Marking Guidelines

QUESTION 3:          CONSTRUCTION ASSOCIATED WITH CIVIL SERVICES, OHSA,
                     AND QUANTITIES (SPECIFIC)

3.1        3.1.1        Hard ground                                                      (1)

           3.1.2        Moderately firm ground                                           (1)

           3.1.3        Moderately firm ground                                           (1)

           3.1.4        Loose and waterlogged ground                                     (1)

           3.1.5        OHS                                                              (1)

3.2        Methods of backfilling trenches are:
            Compaction/Fill and compact 
            Jetting/Flowable fill                                                       (2)

3.3        3.3.1        English bond                                                     (1)

           3.3.2        Queen closer/Closer                                              (1)

           3.3.3        55 mm                                                            (1)

3.4        Workers must:
            wear safety goggles. 
            wear face shield. 
            wear rubber gloves/gloves.
            wear gum boots.
            wear overall.
            wear a respirator.
            ensure that all open wounds are properly covered.
           ANY TWO OF THE ABOVE                                                           (2)

3.5        3.5.1        Protects                                                         (1)

           3.5.2        Competent                                                        (1)

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Civil Technology: Civil Services               10                                 DBE/November 2020
                                     SC/NSC – Marking Guidelines

3.6
                                           

                                     
                                                OR
                              

            ASSESSMENT CRITERIA               MARK
            Manhole cover and frame             3
            Pipe channel                        2
            Sloping concrete/mortar/haunching   2
            Correctness of drawing              1
                                      TOTAL:    8

3.7                        A         B                C                        D
           3.7.1                                                   Volume of tank
                                     22 
                         1/                                        Volume = πr2h
                                     7
                                                                   Note: π = 22
                                    0,9 
                                                                             7
                                    0,9 
                                    2,8 
                                                 7,13 m3 
                                                          OR
                                                                   Volume of tank
                                      22 
                         1/                                        Volume = πr2h
                                      7
                                   (0,9)2 
                                     2,8 
                                                 7,13 m3 

                                                                   Volume of water in the tank
           3.7.2         1/         7,13                          = volume of tank x 1 000
                                   1 000 
                                                 7 130 ℓ                                                (8)
                                                                                                         [30]

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Civil Technology: Civil Services               11                           DBE/November 2020
                                     SC/NSC – Marking Guidelines

QUESTION 4: HOT- AND COLD-WATER SUPPLY, TOOLS, EQUIPMENT AND
            MATERIALS (SPECIFIC)

4.1

                                                
                                                     

                                   OPEN NON-RETURN VALVE

                                                         
                                                            

                                   CLOSED NON-RETURN VALVE

                                           ASSESSMENT CRITERIA                   MARK

                                           Open non-return valve
                                           Correct position of ball                 2
                                           Correct position of spring               1
                                           Closed non-return valve
                                           Correct position of ball                 2
                                           Correct position of spring               1
                                                                        TOTAL:      6               (6)

4.2        4.2.1        Water meter                                                                (1)

           4.2.2        To enable local authorities to calculate the amount of water used
                        by a household.                                                            (1)

           4.2.3        The municipality/local authority/Council                                   (1)

4.3        Water that has been contaminated by/or carries human waste or other
           pollutants. 
           Water from basin, bath and sink is not the desired answer but may be
           accepted when candidates provided it.                                                    (2)

4.4        4.4.1        To join the water closet pan to the sewer pipe.                            (1)

           4.4.2        To connect soil pipes at a 135°angle.                                      (1)

           4.4.3        Where soil pipes have to bend/change direction.                            (1)

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Civil Technology: Civil Services               12                         DBE/November 2020
                                     SC/NSC – Marking Guidelines

4.5        Compressed-air test apparatus                                                           (1)

4.6        Advantages of the red water diverter:
            It uses no electricity 
            No on-going costs 
            No new wiring to new locations 
            No energy wastage from pumps
            No heat loss in recirculating pipes
            Saves water
            Saves money
           ANY THREE OF THE ABOVE                                                                   (3)

4.7        A coupling that can be used to repair a leaking galvanised pipe is:
            Johnson pipe coupling 
            Long screw fitting
            Galvanised union
            Socket/T-piece/45° bend/90°-bend
           ANY ONE OF THE ABOVE                                                                     (1)

4.8        4.8.1        Components that are incorrectly installed:
                         Pressure-reducing valve 
                         Vacuum breaker 
                         Space between geyser and driptray
                        ANY TWO OF THE ABOVE                                                        (2)

           4.8.2        Recommended solutions:
                         Move the pressure reducing valve next to the stop cock before
                          the cold water draw off to other taps. 
                         Install the two vacuum breakers in line with each other,
                          minimum 300 mm above the geyser. 
                         Reduce the space between the geyser and drip tray to ensure
                          that the drip tray properly support the geyser.                           (2)
                        ANY TWO OF THE ABOVE

           4.8.3        Thermostat                                                                 (1)

           4.8.4        It protects the geyser from corrosion.                                     (1)

           4.8.5        Pipe-thread cutting machine                                                (1)

4.9        4.9.1        Evacuated tube                                                             (1)

           4.9.2        A – Outer glass tube/Glass 
                        B – Radiation absorbing coating 
                        C – Inner glass tube 
                        D – Fluid tube                                                             (4)

           4.9.3        Water pressure testing pump                                                (1)

4.10       Both are a form of corrosion.                                                           (1)

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Civil Technology: Civil Services              13                        DBE/November 2020
                                    SC/NSC – Marking Guidelines

4.11       4.11.1       Galvanic corrosion                                                    (1)

           4.11.2       A – Copper pipe 
                        B – Galvanised steel pipe                                             (2)

4.12       Using a drain cleaning machine instead of drain cleaning rods:
            The drain cleaning machine requires a lot less effort/force. 
            The drain cleaning machine is already fully assembled. 
            The drain cleaning machine is self-propelled and no force is necessary
             from a worker.
            The drain cleaning machine works faster.
           ANY TWO OF THE ABOVE                                                                (2)

4.13       Measures to consider when taking care of the bearings of a centrifugal pump:
            Clean the bearing bracket if it contains any oil. 
            Lubricate the bearing regularly. 
           ANY TWO OF THE ABOVE                                                                (2)
                                                                                               [40]

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Civil Technology: Civil Services             14                          DBE/November 2020
                                   SC/NSC – Marking Guidelines

QUESTION 5: GRAPHICS AS MEANS OF COMMUNICATION, ROOF WORK AND
            STORM WATER (SPECIFIC)

5.1        Methods that are used to channel water away from buildings are:
            Gutters on roofs collect rainwater and feed it to down pipes. 
            Channels or inclined surfaces can lead water away from buildings. 
            Manholes connected to storm-water drains will carry the water away from
             inhabited areas to be safely discharged into rivers or dams.
            Furrows can channel water to catchments areas.
            Water tanks.
           ANY TWO OF THE ABOVE                                                                 (2)

5.2        The owner of the property.                                                          (1)

5.3        The purpose of a road kerb:
            Storm water from roads flows along a road kerb until it reaches the storm
             water drain. 
            Channels storm water into the storm water drain.
           ANY ONE OF THE ABOVE                                                                 (1)

5.4

                                                                

                                                                    

                                                                 

            ASSESSMENT CRITERIA               MARK
            125 mm x 40 mm side                  1
            80 mm x 40 mm side                   1
            125 mm x 80 mm centre                1
            Seam                                 2
                                TOTAL:           5                                              (5)

5.5         Stop ends are used to seal the gutter off at the ends. 
            Prevent water flowing out at the gutter ends.
           ANY ONE OF THE ABOVE                                                                 (1)

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Civil Technology: Civil Services                        15                             DBE/November 2020
                                              SC/NSC – Marking Guidelines

5.6        Flashing material:
            Copper 
            Galvanised sheet metal
            Lead
            Bitumastic patents/Bituman
            Rubber sealant
           ANY ONE OF THE ABOVE                                                                               (1)

5.7
                                                             4

                                         6

                                                                         4

                                    5             5

                                                                               4

                                                        5
                                               3                              3

                                    5              5
                          1

                     1
                                                                          4

                                              6

                                                                  4

                               2   2             2        NO ASSESSMENT CRITERIA             MARK
                                                              1 Projection lines to determine
                                                                                                  2
                                                                the apex
                                                              2 Determine true length             3
                                                              3 Top and bottom arc of pyramid     2
                                                                Development of base of
                                                              4                                   5
                                                                pyramid
                                                              5 Development of top of pyramid     5
                                                              6 5 mm seams                        2
                                                                                         TOTAL:  19
                                                                                                              (19)
                                                                                                              [30]
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Civil Technology: Civil Services               16                             DBE/November 2020
                                     SC/NSC – Marking Guidelines

QUESTION 6: SEWERAGE, SANITARY FITTINGS AND JOINING (SPECIFIC)

6.1        6.1.1        C                                                                           (1)

           6.1.2        B                                                                           (1)

           6.1.3        A                                                                           (1)

           6.1.4        C                                                                           (1)

           6.1.5        A                                                                           (1)

6.2        6.2.1        A – Compression joint 
                        B – O-ring compression connection                                           (2)

           6.2.2        A – Used to fix waste pipes into the outlet of the waste trap under
                            basins/baths/sinks/sanitary fitments. 
                        B – Used to join drain pipes.                                               (2)

6.3        6.3.1        A - Overflow 
                        Allows water to flow out if the tap is not closed before the water
                        reaches the point of overflowing.                                           (2)

           6.3.2        22 mm/15 mm/20 mm                                                           (1)

           6.3.3        P – Trap/Gully trap                                                         (1)

           6.3.4        If no inspection eyes are installed:
                         there will be no access to the pipe 
                         it will not be possible to clear blockages. 
                         it will not be possible to inspect for blockages.
                        ANY TWO OF THE ABOVE                                                         (2)

           6.3.5        Water seal/Water level/Water                                                (1)

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Civil Technology: Civil Services             17                       DBE/November 2020
                                   SC/NSC – Marking Guidelines

6.4        Requirements for a sewerage system are:
            The gradient of the pipe installations must be correct – 1:40 or 1:60. 
            The diameter of any drainage pipe must be big enough to carry the
              sludge. 
            Pipes must conform to SABS standards. 
            Pipes must be properly sealed at the joints to prevent gases from
              escaping the system.
            Sharp inclines and angles should be avoided.
            Sewer pipes should be at least 100 mm in diameter.
            All connections must be made at 45°/135°.
            Sufficient volumes of water must be discharged into the system.
            Pipes must be smooth on the inside and made of a strong, durable
              material.
            Approved tools must be used for installations.
            Rodding and inspection eyes need to be installed in the system.
            A manhole must be constructed where two or more pipes meet, at the
              main pipeline junction, or where a distance exceeds 25 metres,
              measured along the line of the drain from a rodding eye or other
              permanent means of access.
            There should be at least one vent pipe in the sewer system.
            Trenches in close proximity to foundations should be backfilled with
              concrete.
            Pipes should be laid in a straight line.
           ANY THREE OF THE ABOVE                                                            (3)

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Civil Technology: Civil Services                       18                            DBE/November 2020
                                             SC/NSC – Marking Guidelines

6.5

                                        
                                            IE

                             

                                        
                                             IE
                                   
                                   VP
                             

                                            IE
                                   G
                             

                                            IE
                                                    IE               IE                     IE           RE
                                                                                                            
                                                                                               
                                                                               VP            G       
                                       RE

             ASSESSMENT CRITERIA                     MARK
            Branch pipes drawn
                                                          5
            correctly
            Vent pipes indicated
                                                          2
            correctly
            Gulleys indicated correctly                   2
            Junction of two main sewer
                                                          1
            pipes
            Rodding eyes                                   2
            Inspection eyes                                2
                                TOTAL:                    14

                                                                                                               (14)

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Civil Technology: Civil Services                 19                     DBE/November 2020
                                    SC/NSC – Marking Guidelines

6.6        6.6.1

                                   MH   
                                                                                            (2)

           6.6.2
                                         OR

                        ACCEPT ANY ROTATION OF SYMBOL AS LONG AS IT IS
                        CORRECTLY DRAWN.                                                    (2)

6.7        6.7.1        Black                                                              (1)

           6.7.2        Green                                                              (1)

6.8        The purpose of a septic tank is to collect/decompose/treat sewage.              (1)
                                                                                            [40]

                                                                                  TOTAL:    200

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