Building And Structural Surveying N4 — Document

April 2020 — N4 — Building And Structural Surveying

N4 2020 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 7 pages 📝 43 items found

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Q1— Section header —

1.1Levelling is the preparation of plans showing and defining legal property boundaries. 𧑉𧑉

1.2Topographical surveying determines the extent of existing work to keep the relationship between surface and underground work correct.

1.3Mean sea level is the mean level of the sea.

1.4Cadastral surveying determines the differences in height of points on the surface of the earth.

1.5Qualities of a good surveyor include having a sound knowledge of the theory and practice of surveying.

1.6A benchmark is a fixed point of known height from which the level of other points may be established.

1.7A horizontal line at a point is perpendicular to the direction of the plumb line at the point and tangential to the level at that point.

1.8A triangulation survey involves the building up of a network of triangles from an accurately measured base line by measuring the angle only. 𧑉𧑉

1.9Backsight is the last reading taken before moving the instruments.

1.10A collimation line is a straight line joining the line of sight. (10 × 1) [10]10

Q2— Section header —

2.1Define the term chain surveying . (3)3

2.2Give FOUR disadvantages of a chain. (4)4

2.3The field book on the DIAGRAM SHEET (attached) give details of a chain survey. All measurements are given in meters. 𧑉𧑉 Plot, to scale 1:500, the stations, lines and detail in the ANSWER BOOK. (10)10

Q3— Section header —

3.1A measured distance of 98,600 m was obtained between two points with a 100 m long tape that was later found to be 0,02% short. Calculate the correct length. 𧑉𧑉 (4)4

3.2Which distance in metres does 30 mm represent on a map scale of 1:250 000? (3)3

3.3Calculate the distance between two points on a map if the representative fraction on the map is 1:10 000 and the actual ground distance is 1 500 m. (3) [10]10

Q4— Section header —

4.1Define the term planimeter . (3)3

4.2Give TWO advantages of a steel tape. (2) 𧑉𧑉

4.3Differentiate between a polar planimeter and a linear planimete r . (3 + 3) (6) [11]11

Q5— Section header —

5.1Plane

5.2Datum

5.3Change point

5.4Grid north

5.5Magnetic declination

5.6Agonic line 𧑉𧑉 5 .7 Topographic survey

5.8Prime meridian

5.9Line of longitude

5.10Parallax (10 × 2) [20] Copyright reserved Please turn over (8060034) -5-20

Q6— Section header —

Q7— Section header —

7.1Explain the objective of surveying. (5)5

7.2Define each of the fol lowing methods of surveying:

7.2.1Tacheometric surveying (3) 𧑉𧑉

7.2.2Traversing surveying (3)3

7.2.3Compass surveying (2) [13]13

Q8— Section header —

8.1A tape is 0,73 too short. Calculate the correct distance to be measured with the tape so that the base line is exactly 450 m long. (4)4

8.2Distance measured: 180 m Standard temperature: 20 °C Coefficient of linear expansion: 0,0000113/°C Temperature at the time of measurement: 25 °C 𧑉𧑉 Calculate the correct distance. (5) [9] TOTAL: 1009

Mark Allocation

Total100 marks

Sections10 + 17 + 10 + 11 + 20 + 10 + 13 + 9 = 100 marks

Per-question sum58 marks

Paper information

TitleDocument

SubjectBuilding And Structural Surveying

LevelN4

Document typeQuestion paper

Year2020

MonthApril

Pages7

Downloads5

Examination context

Decade2020s

Years ago6y

SeasonAutumn (SH)

Start dayWednesday

Exam periodApril 2020

Days since exam2,385

About Building And Structural Surveying examination preparation

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