Surveying and Levelling

31. An ideal vertical curve to join two gradients, is

  1. Circular
  2. Parabolic
  3. Elliptical
  4. Hyperbolic

Correct answer: (B)
Parabolic

32. An imaginary line joining the points of equal elevation on the surface of the earth, represents

  1. Contour surface
  2. Contour gradient
  3. Contour line
  4. Level line

Correct answer: (C)
Contour line

33. An imaginary line lying throughout on the surface of the earth and preserving a constant inclination to the horizontal, is called

  1. Contour line
  2. Contour gradient
  3. Level line
  4. Line of gentle scope

Correct answer: (B)
Contour gradient

34. An imaginary line lying throughout the surface of ground and preserving a constant inclination to the horizontal is known as

  1. Contour line
  2. Horizontal equivalent
  3. Contour interval
  4. Contour gradient

Correct answer: (D)
Contour gradient

35. An internal focussing type surveying telescope, may be focussed by the movement of

  1. Objective glass of the telescope
  2. Convex-lens in the telescope
  3. Concave lens in the telescope
  4. Plano-convex lens in the telescope

Correct answer: (C)
Concave lens in the telescope

36. Angles to a given pivot station observed from a number of traverse stations when plotted, the lines to the pivot station intersect at a common point

  1. Angular measurements are correct and not the linear measurements
  2. Linear measurements are correct and not the angular measurements
  3. Angular and linear measurements are correct and not the plotting of traverse
  4. Angular and linear measurements and also plotting of the traverse are correct

Correct answer: (D)
Angular and linear measurements and also plotting of the traverse are correct

37. Back bearing of a line is equal to

  1. Fore bearing ± 90°
  2. Fore bearing ± 180°
  3. Fore bearing ± 360°
  4. Fore bearing ± 270°

Correct answer: (B)
Fore bearing ± 180°

38. Benchmark is established by

  1. Hypsometry
  2. Barometric levelling
  3. Spirit levelling
  4. Trigonometrical levelling

Correct answer: (C)
Spirit levelling

39. Bergschrund is a topographical feature in

  1. Plains
  2. Water bodies
  3. Hills
  4. Glaciated region

Correct answer: (B)
Water bodies

40. Bowditch rule is applied to

  1. An open traverse for graphical adjustment
  2. A closed traverse for adjustment of closing error
  3. Determine the effect of local attraction
  4. None of the above

Correct answer: (B)
A closed traverse for adjustment of closing error

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