Download PTU B-Tech CE 2020 Dec 3rd Sem 56075 Surveying Question Paper

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B.Tech. (CE) (2012 to 2017) (Sem.-3)

SURVEYING

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Subject Code : BTCE-304

M.Code : 56075

Time : 3 Hrs. Max. Marks : 60

INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.

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2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

Answer briefly :

1. What is Reconnaissance?

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2. What do you understand by limiting length of an offset in chain survey?
3. Explain with neat sketches open traverse.
4. Define the following: True bearing and Magnetic bearing.
5. What is meant by plane tabling?
6. Explain the need for the following field precautions in leveling :
   1. Bring the bubble to mid-run just before taking a reading.

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   2. Keep, as far as possible, back sight and fore sight distances equal.
7. Define, with the help of neat sketches the following:- Height of instrument and Fore Sight.
8. List the two uses of a contoured topographic map.
9. What contour intervals would you suggest for the following : Engineering project and A city survey

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10. Define the tangent length with respect to curves.

SECTION-B

11. The length of the offset is 20 m and the scale of the plant is 5 m to 1 cm. If the offset is laid out 4° from its true direction in the field, find the resulting displacement of the plotted point on the paper (i) in a direction parallel to the chain line (ii) in a direction perpendicular to the chain line.
12. What are sources of error in plane table survey? Discuss briefly.
13. A chain line ABC crosses a river, B and C being on the near and distant banks respectively. A line BD of length 100 m is set out at right angles to chain line at B. If the bearings of BD and DC are 287° — 15" and 62° — 15' respectively. Find the width of the river.

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14. What are the difficulties in setting out simple curves? Describe briefly the methods employed in overcoming them.
15. The following bearings are given : calculate in each case, the angle BAC.
    AB AC
    a) N25°-30'E N85°-15'E
    b) N20°-15'E N52°-30'E
    

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    c) S70°-0'E S10°-0'W
    d) N40°-30'W N46°-0'E
    e) N50°-30'E S20°-30'W

SECTION-C

16. The following notes refer to a part of a traverse survey :
    

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    Line Length in metres Bearing
    AB 686 352°24'
    BC 1824 24°36'
    CD 1053 147° 30’
    Calculate the distance between a point E on AB, 28 m from A, and a point F on CD 650 m from C.

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17. What are sources of error in Chain survey? Explain in detail.
18. Calculate the offsets at 20 m intervals along the tangents to locate a curve having a radius 0f 400 m, the deflection angle being 60°.
    a) Define an expression for the following elements of a simple curve :
    b) Length of curve
    c) Apex distance
    

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    d) Mid ordinate

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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