### Civil Engineering - Surveying MCQs Part 7

1. Tilt of the staff in stadia tacheometry increases the intercept if it is

A.
away from the telescope pointing down hill
B.
towards the telescope pointing up-hill
C.
away from the telescope pointing up-hill
D.
none of these.

2. The conventional sign shown in below figure represents a

A.
bridge carrying railway below road
B.
bridge carrying road below railway
C.
bridge carrying road and railway at the same level
D.
a level crossing.

3. To orient a plane table at a point with two inaccessible points, the method generally adopted, is

A.
intersection
B.
resection
C.
D.
two point problem.

4. The combined effect of curvature and refraction over a distance L kilometres is

A.
67.2 L2 mm
B.
76.3 L2 mm
C.
64.5 L2 mm
D.
none of these.

5. Number of links per metre length of a chain are

A.
2
B.
5
C.
8
D.
10
E.
20

6. The method generally preferred to for contouring an undulating area, is

A. chain surveying
B. plane table surveying
C. tacheometrical surveying
D. compass surveying.

7. If the declination of the needle is 10° W

A. each of the whole circle reckoning has to be micros by 10°
B. in the quadrantal method, the correction is positive in the 1st and 3rd quadrants
C. in the quadrantal method, the corrections is negative in 2nd and 4th quadrants
D. all the above.

8. A level when set up 25 m from peg A and 50 m from peg B reads 2.847 on a staff held on A and 3.462 on a staff held on B, keeping bubble at its centre while reading. If the reduced levels of A and B are 283.665 m and 284.295 m respectively, the collimation error per 100 m is

A. 0.015 m
B. 0.030 m
C. 0.045 m
D. 0.060 m

9. For taking offsets with an optical square on the right hand side of the chain line, it is held

A. by right hand upside down
B. by left hand upright
C. by right hand upright
D. by left hand up side down.

10. If the whole circle bearing of a line is 270°, its reduced bearing is

A. N 90° W
B. S 90° W
C. W 90°
D. 90° W.

11. A lens or combination of lenses in which the following defect is completely eliminated is called aplanatic

A. spherical aberration
B. chromatic aberration
C. coma
D. astigmatism.

12. While setting a plane table at a station it was found that the error in centering was 30 cm away from the ray of length 40 m drawn from the station. If the scale of the plan is 1 cm = 2 cm, the displacement of the end of the ray in plan from the true position will be

A. 0.02 cm
B. 0.15 cm
C. 02 cm
D. 0.1 cm

13. In precision theodolite traverse if included angles are read twice and the mean reading accepted using both verniers having a least count of 30". Assuming the instrument to be in perfect adjustment, linear measurements correct to 6 mm per 30 metre tape duly corrected for temperature, slope and sag, the angular error of closure not to exceed (where n is the number of traverse legs)

A. 50" n
B. 30" n
C. 60" n.

14. Straight, parallel and widely spaced contours represent

A. a steep surface
B. a flat surface
C. an inclined plane surface
D. curved surface.

15. The theodolites used for making tacheometric observations by optical wedge system, are

A. provided with stadia hairs in front of eye piece
B. not provided with stadia hairs at all
C. fitted with a glass wedge inside the telescope
D. fitted with a glass wedge in front of telescope.

16. Resolving power of a telescope depends on

A. the diameter of the aperture
B. the pupil aperture of the eye
C. the diameter of the object glass
D. all the above.

17. If 50 m point of a 100 m tape is 50 cm off line, and 50 m sections are straight, an error is generated equal to

A.
B.
C.
D. .

18. Pick up the correct statement from the following :

A. with both handles in his left hand, the chain man throws out the chain with his right hand and the second chain man assists him to free it from knots
B. the follower of the chaining operation should be more experienced than the leader
C. at the end of the tenth chain length, the two chain men meet and the ten arrows are handed over to the leader
D. all the above.

19. If Δ is the angle of deflection of a simple curve of radius R, the distance between the mid-point of the curve and long chord, is

A.
B.
C.
D. .

20. The 10 mm markings on a levelling staff placed at 20 m are separated by

21. Staff readings on pegs x and y from X station are 1.755 m and 2.850 m, and from station Y on staff head at Y and X are 0.655 m and 1.560 m. If reduced level of X is 105.5 m, the reduced level of Y is

A. 104.0 m
B. 104.5 m
C. 105.0 m
D. 105.5 m

22. The constant vertical distance between two adjacent contours, is called

A. horizontal interval
B. horizontal equivalent
C. vertical equivalent
D. contour interval

23. The reduced level of a floor is 99.995 m, the staff reading on the floor is 1.505 m. If the inverted staff reading against the roof is 1.795 m, the floor level below the slab, is

A. 3.290 m
B. 3.300 m
C. 3.275 m
D. 2.790 m

24. The correction to be applied to each 30 metre chain length along θ° slope, is

A. 30 (sec θ - 1) m
B. 30 (sin θ - 1) m
C. 30 (cos θ - 1) m
D. 30 (tan θ - 1) m
E. 30 (cot θ - 1) m.

25. If F is the pull applied at the ends of tape in kg, l is the length of tape between end marks in metres, w is the weight of the tape in kg per metre run, then sag correction

A.
B.
C.
D. .

26. Under ordinary conditions, the precision of a theodolite traverse is affected by

A. systematic angular errors
B. accidental linear errors
C. systematic linear errors
D. accidental angular errors.

27. Pick up the incorrect statement from the following :

A. while measuring a distance with a tape of length 100.005 m, the distance to be increasing by 0.005 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.

28. Stadia techeometry was discovered by James Watt in the year.

A. 1670
B. 1770
C. 1870
D. 1900.

29. The bearing of lines OA and OB are 16° 10' and 332° 18', the value of the included angle BOA is

A. 316° 10'
B. 158° 28'
C. 348° 08'
D. 43° 52'

30. The properties of autogenous curve for automobiles are given by

A. true spiral
B. cubic parabola
C. Bernoulli's Lemniscate
D. clothoid spiral.

31. If + 0.8% grade meets - 0.7% grade and the rate of change of grade for 30 m distance is 0.05, the length of the vertical curve will be

A. 600 m
B. 700 m
C. 800 m
D. 900 m
E. 1000 m

32. The included angles of a theodolite traverse, are generally measured

A. clockwise from the forward station
B. anti-clockwise from the back station
C. anti-clockwise from the forward station
D. clockwise from the back station.

33. Location of contour gradient for a high way is best set out from

A. ridge down the hill
B. saddle down the hill
C. bottom to the ridge
D. bottom to the saddle.

34. If h1 and h2 are the differences in level between ground and the formation levels, m is the slope of the sloping sides. D is the distance between the cross sections then, prismoidal correction for a level section is

A. D/2m(h1 - h2)
B. D/3m(h1 - h2)
C. D/6m(h1 - h2)2
D. D/6m(h1 - h2)3
E. D/6m(h1 + h2)2

35. In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is

A. 5.24 cm
B. 6.24 cm
C. 7.24 cm
D. 8.24 cm

36. The line normal to the plumb line is known as

A. horizontal line
B. level line
C. datum line
D. vertical line.

37. The angle of intersection of a curve is the angle between

A. back tangent and forward tangent
B. prolongation of back tangent and forward tangent
C. forward tangent and long chord
D. back tangent and long chord.

38. Planimeter is used for measuring

A. volume
B. area
D. slope angle
E. none of these

39. In a perfect prismatic compass

A. magnetic axis and geometric axis of the needle coincide
B. ends of the needle and pivot are in same vertical and horizontal planes
C. pivot is vertically over the centre of the graduated circle
D. needle is always kept sensitive
E. all the above.

40. The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as

A. chromatic aberration
B. spherical aberration
C. astigmatism
D. coma.

41. The staff reading at a distance of 80 m from a level with the bubble at its centre is 1.31 m. When the bubble is moved by 5 divisions out of the centre, the reading is 1.39 m. The angular value of the one division of the bubble, is

A. 28.8 secs
B. 41.25 secs
C. 14.52 secs
D. 25.05
E. none of these

42. If i is the stadia distance, f is the focal length and d is the distance between the objective and vertical axis of the techeometer, the multiplying constant, is

A. f/i
B. i/f
C. (f + d)
D. f/d.

43. The back staff reading on a B.M. of R.L. 500.000 m is 2.685 m. If foresight reading on a point is 1.345 m, the reduced level of the point, is

A. 502.685 m
B. 501.345 m
C. 501.340 m
D. 504.030 m
E. 502.585 m.

44. It is more difficult to obtain good results while measuringhorizontal distance by stepping

A. up-hill
B. down-hill
C. in low undulations
D. in plane areas.

45. The additional lines which are measured to show the correctness of the chain surveying are called:

A. check clines
B. proof lines
C. tie lines
D. all of these.

46. If deflection angles are measured in a closed traverse, the difference between the sum of the right-hand and that of the left hand angles should be equal to

A. 0°
B. 90°
C. 180°
D. 360°

47. Locating the position of a plane table station with reference to three known points, is known as

A. intersection method
C. resection method
D. three point problem.

48. If D is the degree of the curve of radius R, the exact length of its specified chord, is

A. radius of the curve x sine of half the degree
B. diameter of the curve x sine of half the degree
C. diameter of the curve x cosine of half the degree
D. diameter of the curve x tangent of half the degree.

49. Correction per chain length of 100 links along a slope of α° is

A.
B.
C.
D. 1.5α3.

50. If the chain line which runs along N-S direction is horizontal and the ground in E-W direction is sloping

A. it is possible to set offsets correctly on east side
B. it is possible to set offsets correctly on east side
C. it is not possible to set offsets correctly on west side
D. it is possible to set offsets correctly on both sides.