1 Line Length I Bearing

Size: px

Start display at page:

Download "1 Line Length I Bearing"

Roger Sharp
5 years ago
Views:

being 6 15'W. Calculate the true bearing of the line also error of closure and relative error of closure. 1 Line Length I Bearing AB 470m 343 52' BC 635 m 87 50' CD 430 m 172 40' DA 563 m 265 12' 9.

1 being 6 15'W. Calculate the true bearing of the line also error of closure and relative error of closure. 1 Line Length I Bearing AB 470m ' BC 635 m 87 50' CD 430 m ' DA 563 m ' 9. (a) What are the characteristics of contours? Mention any four uses of contour maps. 4 The following reading are successively taken from an instrument in. a levelling work , 1.235, 2.310, 1.385, :125, 4.125, 0.120, 1.875, 2.030, The position of the instrument was changed after taking second, fourth and eighth readings. The first reading was taken on a staff held at BM of RI Tn. Enter the readings in level book form. Calculate the RLS of all the points and apply. usual arithmatic check. 5 State the classification of levelling. Explain any one in detail. 4 S AP 1815 Fourth Semester B. E. (Civil Engg.) (CGS) Examination P. Pages : 11 Time : Three Hours I SURVEYING 4 CE 04 [Max. Marks : 80 Note : (1) Separate answer book must be used for each section in the subject Geology, Engineering material of civil branch and Separate answer-book must be used for Section A and B in Pharmacy and Cosmetic Tech. (2) Answer Three questions from Section. A and Three questions from Section B. (3) Due credit v..,:11 be given to neatness and adequate dimensions. (4) ilustratc your answer wherever necessary with the help of neat sketches. (5) Use pen of B Itte/B lack inkirefiil only for writing the answer book. SECTION A 1. (a) What is meant by chain surveying '? Explain the principle on which. it is based. 4 AP 1815 P.T.O.

If an offset is laid out 4 from its true direction on the field, find the resulting displacement of the plotted on the paper : (a) In a direction parallel to the chain and In a direction

2 If an offset is laid out 4 from its true direction on the field, find the resulting displacement of the plotted on the paper : (a) In a direction parallel to the chain and In a direction perpendicular to the ch line, given that the length of the offse is 12 m and scale is 1 cm = 1m. 4 The length of a chain line when measured with a 20 m chain was found to be 2000 m. But a 30 in chain, which had one link missing between 25 m to 30 m was used for the purpose, the line was found to be 2570 m long. What was the error in the 20 m chain? 6 (ii) Latitude and departure. (iii) Swinging and transiting. 6 The consecutive co--ordinates of a line AB are and with reference to the magnetic meridian. Calculate its coordinates with reference to the true meridian, given that the magnetic declination is 10 12' East. 4 In a closed traverse Latitude and departure of the sides were calculated and it was observed that I latitude = 1.39 and departure = Calculate length and bearing of the closing error (a) Explain following tape corrections Correction for sag. (ii) Correction for pull. 4 Define a line ranger. How is it used in the field? 4 How would you prolong a straight line very accurately when the instrument is in poor adjustment? 4 How would :'ou measure a horizontal angle by the method of Repetition? 4 Following are the lengths and bearing of the sides of a closed traversed ABCD. The bearings are reference to the magnetic meridian. The value of magnetic declination AP-1815 AP P.T.O.

What are the fundamental lines of a dumpy level? Mention the desired relation between them. 4 6. (a) Explain how the two-peg adjustment of a dumpy level is carried out.

3 What are the fundamental lines of a dumpy level? Mention the desired relation between them (a) Explain how the two-peg adjustment of a dumpy level is carried out. 4 Mention the advantages of tilting level. 4 The following observations were taken during testing of a dumpy level. Instrument Staff Readings on at A B A B What should be the staff readings on A during second set of the instrument to make the line of collimation truly horizontal? 5 SECTION B 7. _ (a) Differentiate between following :- A steel was exactly 30 m Jong at 20 C when supported throughout its length under the pull of 15kg. A line was measured with this tape under a pull of 16 kg and at mean tempreature of 32 C and found to be 790m long. The c/s area of the tape = 0.03 cm 2 steel = 11xle per C and E for steel = 2.1 x106 kg/cm2. Compute the true length of the link if the tape was supported during measurement : at every 30 m. (ii) at every 15 m What is error of closure? How would you adjust it graphically? 4 Discuss the functions of the following in a compass : Prism. (ii) Looking Mirror, t 4 and its total wt = kg. a for Face left and face right. AP AP P.T.O.

The following bearing were observed with a compass. Calculate the interior angles : Line AB BC CD DA EA Fore bearing 60 3(Y 122 0' 46 0'.205 30' 4 (a) Define the following : Tie line.

4 The following bearing were observed with a compass. Calculate the interior angles : Line AB BC CD DA EA Fore bearing 60 3(Y 122 0' 46 0' ' 4 (a) Define the following : Tie line. (ii) Reduced bearing. (iii) Dip of Magnetic needle (iv) Least count of vernier theodolite. 4 A line was drawn to a magnetic bearing of 220 on old map, when the magnetic declination was 5 W. To what hearing should it be set now if the Magnetic declination is now 10 E? 4 The following fore and back bearing were observed in running compass traverse correct for local attraction. Compute he values of corrected bearing. Line Fore bearing Back bearing AB 44 30' V6 30' BC ' 30 15' CD 181 0' 1 00' DA ' ;8045t 5. (a) A duinpv level was set-up exactly midway between two pegs A and B. 75m apart. The readings on staff when held OT1 the peg A and B were and retectively. The instrument was then moved and set up at C in line BA 15m behind A. The respective, readings xi A and B were and Calculate the staff readings on A and B during the secoul ze. 1.4p to give a horizontal line of sight. Explain the principle of reversal. 4 5 AP.._ 1521c 1),4 P.T.O.

10. (a) Define the following : (ii) Datum. G.T.S. Bench mark. (iii) Line of collimation. (iv) Levelling. 4 Find out missing readings indicated by x and complete the level book page.

5 10. (a) Define the following : (ii) Datum. G.T.S. Bench mark. (iii) Line of collimation. (iv) Levelling. 4 Find out missing readings indicated by x and complete the level book page. Apply usual arithmetic checks. B.S. 1.S. F.S. H.L. R.L. Remark 'x.-...v.- x Point 1 x Point x x Point I B.M x B.M x Point5 Staff inverted x x x Point Point 7 AP P.T.O. 5

$, Find the correction for curvature and correction for refraction for a distance : (a) 800 m and 2.5 Km. 11.$

6 , Find the correction for curvature and correction for refraction for a distance : (a) 800 m and 2.5 Km. 11. (a) What is two point problem in plane tat Describe the procedure for solving the point problem. State advantages and disadvantages of plane table surveying. 4 How is tangent clinometer used for determining the elevation of distant points in plane tabling? 4 What is meant by plane table surveying? Explain any two methods of the surveying with plane table. 5 The following readings were obtained when a figure was traversed clockwise with an anchoe point outside and with the tracing arm to the natural scale giving a multiplying constant equal to 100 sq.cm. The zero of the counting disc passed the fixed index mark once in the clockwise direction. Initial reading = Final reading = Calculate the area of figure. 4 Jn 12. (a) How will you use Abney level to measure slope of the ground? 4 AP AP

ALPHA COLLEGE OF ENGINEERING

ALPHA COLLEGE OF ENGINEERING DEPARTMENT OF CIVIL ENGINEERING QUESTION BANK 10CV34 SURVEYING-I UNIT -01 INTRODUCTION 1. Explain plane surveying and geodetic surveying. 2. Write a note on precision and accuracy