1. In chain surveying tie lines are primarily provided a) to check the accuracy of the survey b) to take offsets for detail survey c) to avoid long

Size: px

Start display at page:

Download "1. In chain surveying tie lines are primarily provided a) to check the accuracy of the survey b) to take offsets for detail survey c) to avoid long"

Angelica Nelson
5 years ago
Views:

1 1. In chain surveying tie lines are primarily provided a) to check the accuracy of the survey b) to take offsets for detail survey c) to avoid long offsets from chain lines d) to increase the number of chain lines 2. In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by a) adding 180, if the given bearing is less than 180 b) subtracting 180, if the given bearing, is more than 180 c) changing the cardinal points, i.e. substituting N for S and E for W and vice-versa d) None of these. 3. Pick up the method of surveying in which field observations and plotting proceed simultaneously from the following a) chain surveying b) compass surveying c) plane table surveying d) Tacheometric surveying. 4. For a well-conditioned triangle, a) >300 and <1200 b) <300 and >1200 c) All angles must be 600 d) None of the above 5. Pick up the incorrect statement from the following: a) While measuring a distance with a tape of length m, the distance to be increasing by m for each tape length b) an increase in temperature causes a tape to increase in length and the measured distance is too large c) the straight distance between end points of a suspended tape is reduced by an amount called the sag correction d) a 100 m tape of cross section 10 mm x 0.25 mm stretches about 10 mm under 5 kg pull. 6. The back staff reading on a B.M. of R.L m is m. If foresight reading on a point is m, the reduced level of the point, is a) m b) m c) m d) m e) m 7. Closed contours of decreasing values towards their centre, represent a) a depression b) a hill c) a saddle or pass d) a river bed. 8. For the construction of highway (or railway) a) cross sections are required b) longitudinal sections are required c) both longitudinal and cross sections are required d) none of these. 9. While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is

2 a) said to have parallax. b) Free from parallax. c) not correctly focused d) Correctly focussed 10. Choose the incorrect statement a) Two contour lines intersect in the case of a vertical cliff b) A watershed crosses the contours at right angles c) The direction of steepest slope is along the longest distance between the contours d) In the direct method of contouring, the contours are not interpolated. 11. The coordinates of A are 100 (northing) and 200 (easting), whereas that of B are 100 (southing) and 200 (easting). The length AB is, a)200 (b) (c) (d) If the lower clamp screw is tightened and the upper clamp screw is loosened, the theodolite may be rotated a)with a relative motion between the vernier and the graduated scale of the lower plate b) Without a relative motion between the vernier and the graduated scale of the lower plate c) Both (a) and (b) d) Horizontal axis 13. To observe an included angle with better accuracy then what is achieved by reading the verniers of a theodolite, the method preferred is (a) Repetition (b) Reiteration (c) Double observations (d) Any of these 14. The permanent adjustments of a theodolite consist of the following operations : 1.Adjustment of the horizontal plate level 2.Adjustment of the horizontal axis 3.Adjustment of the telescope 4.Adjustment of the telescope level 5.Adjustment of the vertical circle index (A) (1) (2) (3) (4) (5) (B) (1) (2), and (3) only (C) (1) (4) (5) only (D) (1) (3) (5) only 15. Choose the correct statement(s). (a) The horizontal circle of a vernier theodolite is graduated in the quadrantal bearing system. (b) The vertical circle of a vernier theodolite is graduated from 0 to 90 (A) Only (a) is correct (B) Only (b) is correct (C) Both (a) and (b) are correct (D) (b) follows (a) 16. In a Tacheometer (a) The lower clamp and the tangent screws are used to bring the line of sight along a reference line (b) The upper clamp and the tangent screws are used to set 0-0 reading on the plates before sighting along the reference line (c) The upper clamp and the tangent screws are used to obtain a differential movement between the upper and the lower plates (A) (a) and (b) are correct

3 (B) (a) and (c) are correct (C) (b) and (c) are correct (D) All the correct. 17. If the spacing of cross hairs in a stadia diaphragm of Tacheometer is 12mm, and the focal length of the object glass is 24cm, then the multiplying constant of the tacheometer is a) 20 (b)100 (c) (d) The purpose of an anallactic lens in a tacheometer is to (a) Increase magnification (b) Reduce effective length of the telescope (c) To eliminate multiplying constant (d) Make staff intercept proportional to its distance from the tacheometer 19. Choose the incorrect statement (a) Tacheometry is preferred over chaining on undulating grounds (b) Tacheometry is very suitable for preliminary location surveys (c) Vertical holding of staves is better than normal holding since the error on account of improper staff holding is less (d) A subtense bar is used to measure short distances 20. In case of an elevated line of sight when a staff is held normal to the line of sight, the horizontal distance D is a)ks+c b)ks cos 2 Ɵ+ C cos Ɵ c)(ks+c) cos Ɵ +h sin Ɵ d)none of these 21. Measuring with a 30 m chain, 0.01 m too short, introduces a. positive compensating error b. negative compensating error c. positive cumulative error d. negative cumulative error 22. ABCD is a rectangular plot of land. If the bearing of the side AB is 75, the bearing of DC is a. 75 b. 255 c. 105 d The reduced level of a floor is m; the staff reading on the floor is 1.505m. If the inverted staff reading against the roof is m, the floor level below the slab, is a m b m c m d m 24. The intercept of a staff a. is maximum if the staff is held truly normal to the line of sight. b. is minimum if the staff is held truly normal to the line of sight. c. decreases if the staff is tilted away from normal d. increases if the staff is tilted towards normal 25. The operation of bringing the face of the telescope from left to right and vice versa is called as a) Swinging b) Changing c) Transiting d) Rotating 26. The least count of theodolite is a) 45 b) 30 c) 25 d) The principle of stadia method states that the ratio of the perpendicular to the base is constant in similar a) Equilateral triangle b) Well conditioned triangle c) Right angled Triangle d) Isosceles triangle 28. If vertical angles of inclined sights do not exceed 10 and non-verticality of the staff remains within 1, stadia system of tacheometric observations are made on a. staff normal

4 b. staff vertical c. staff normal as well as vertical d. none of these. 29. Tacheometry is best suited to survey a ground. a) Level b) undulating c) congested d) none of these 30. The subtense bar is used to measure a) Short lines in a traverse b) Perpendicular lines in a traverse c) Long lines in a traverse d) Inclined lines in a traverse. Two marks 1. Differentiate plane and geodetic surveying. 2. Convert whole circle bearing to quadrantal bearing: a) b) c) d) Define bearing. Give the difference between true and magnetic bearing. 4. Differentiate between level surface and horizontal surface with neat sketch. 5. Define levelling and differentiate horizontal and level lines. 6. Compare theodolite surveying and tacheometric surveying. 7. Define Latitude and Departure. 8. Distinguish between stadia and tangential method 9. Differentiate consecutive and Independent coordinates. 10. Brief the usage of subtense bar. 11. List the advantages of Plane table surveying 12. List the advantages of Rise and Fall method in levelling. 13. Define Reciprocal Levelling 14. List the classifications of omitted measurements 15. Define multiplicative and additive constants in a tacheometer. Ten Marks 1. A base line AC was measured in two parts along two straight drains AB and BC of length 1650m and m with a steel tape which was exactly 30m at 25 0 C at a pull of 9 N. The applied pull during measurement of both parts was 200 N whereas respective temperatures were 30 and 3030 and the deflection angle of BC was 100 right. Find the correct length of the base line if the cross section area of the tape was 2.5 mm 2. The coefficient of expansion and modulus of elasticity of tape material were 3.5 x 10-6 per or 10 C and 21 x 105 N/mm2 respectively. 2. The following bearings are observed in running a compass traverse ABCD, in a place where the local attraction was suspected. Line FB BB AB S E N W BC S E N W CD S W N E DA N W S E At what stations do you suspect Local attraction? Determine the correct bearings and the included angles. 3. The following consecutive readings were taken with a dumpy level and a 4m staff on a continuously sloping ground on a straight line at a common interval of 30m , 1.455, 1.855, 2.330, 2.885, 3.380, 1.055, 1.860, 2.265, 3.540, 0.835, 0.945, 1.530, and The reduced

5 level of the first point was Rule out a page of a level field book and enter above readings. Calculate the reduced levels of the line joining the first and last point. Also calculate the gradient of the line joining the first and last point 4. The following readings were taken from the page of an old level field book, fill up the missing entries and apply the usual check. Station B.S I.S F.S Rise Fall R.Ls Remarks BM 2 X X CP x CP x BM 5. A traverse is run to set out a line MQ = 1900m at right angles to a given line MN. The lengths and Bearings of traverse legs are observed as follows: Line Length Bearings MN MO OP PQ?? Compute the length and bearing of PQ. 6. To determine the elevation of the top of a flagstaff, the following observations were made: Inst. Station Reading on Angle of B.M. elevation Remarks A R.L of B.M = B m Station A and B and the top of the aerial pole are in the same vertical plane. Find the elevation of the top of the flagstaff, if the distance between A and B is 50m. 7. To determine the distance between two points X and Y and their elevations, the following observations were recorded upon vertically held staves from two traverse stations R and S. The tacheometer was fitted with an anallactic lens and the instrument constant was 100. Traverse station R.L. in m H.I. (m) Coordinates of station L D Staff Station Bearing Vertical Angle Stadia readings R X , 1.85, 2.60 S Y , 1.91, 2.50 Compute the distance XY, the gradient from X to Y and bearing of XY. 8. Determine the RL of A, if the following observations were taken for determining the RL of A: Inst Stn. H.I. of Inst (m) Staff Station Vertical Angle Staff readings Remarks Q 1.60 B.M , 1.675, RL of B.M is m Q 1.60 P , 2.380, A 1.65 P , 0.655, The instrument was fitted with an anallactic lens.

6 9. A steel tape 20 m long standardized at 55 F with a pull of 10 kg was used for measuring a base line. Find the correction per tape length, if the temperature at the time of measurement was 80 F and the pull exerted was 16 kg. Weight of one cubic cm of steel = 7.86 g, Wt. of tape = 0.8 kg and E = X 106 kg/cm2. Co-efficient of expansion of tape per 1 F = 6.2 X Obtain an expression for correction for curvature and refraction 11. A closed traverse was conducted round an obstacle and the following observations were made. Work out the missing quantities: Side Length (m) Azimuth/ Bearing AB BC CD DE? EA? A tacheometer was set up at a station A and readings on a vertically held staff at B were 2.255, and 2.955, the line of sight being at an inclination of Another observation on the vertically held staff at benchmark gave the readings 1.640, & 2.200, the inclination of the line of sight being Calculate the horizontal distance between A and B and the elevation of B if h was determined from observation on to a reduced level of BM is m. The constants of the instrument were 100&0.3.

(a) Barometric levelling (b) Trigonometric levelling (c) Spirit levelling [16]

(a) Barometric levelling (b) Trigonometric levelling (c) Spirit levelling [16] Code No: R050210103 Set No. 1 II B.Tech I Semester Supplementary Examinations, February 2007 SURVEYING (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal