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  • Question

  • Accurate measurement of deflection angles with a transit not properly adjusted may be made by


  • Options
  • A. setting the vernier A at zero at back station and then plunging the telescope
  • B. setting the vernier A at zero at back station and turning the instrument to the forward station
  • C. taking two back sights one with the telescope normal and the other with telescope inverted
  • D. none of these.

  • Correct Answer
  • taking two back sights one with the telescope normal and the other with telescope inverted 

    • Surveying problems

    Search Results

    • 1. The reduced bearing of a line is N 87° W. Its whole circle bearing is

    • Options
    • A. 87°
    • B. 273°
    • C. 93°
    • D. 3°
      • Discuss
    • 2. An angle of deflection right, may be directly obtained by setting the instrument to read

    • Options
    • A. zero on back station
    • B. 180° on back station
    • C. 90°
    • D. 270° on back station.
      • Discuss
    • 3. The power of a lens

    • Options
    • A. is reciprocal of its focal length
    • B. is positive if it is a convex lens
    • C. is negative if it is a concave lens
    • D. is measured in diopter.
      • Discuss
    • 4. If V is the speed of a locomotive in km per hour, g is the acceleration due to gravity, G is the distance between running faces of the rails and R is the radius of the circular curve, the required super elevation is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. ?, ? are the horizontal angles measured at the ends of a base line AB to a hill top whose angle of elevation from station A is ?°. The height of the hill top above the trunnion axis of the theodolite station, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 6. If whole circle bearing of a line is 120°, its reduced bearing is

    • Options
    • A. S 20° E
    • B. S 60° E
    • C. N 120° E
    • D. N 60° E.
      • Discuss
    • 7. Transition curves are introduced at either end of a circular curve, to obtain

    • Options
    • A. gradually decrease of curvature from zero at the tangent point to the specified quantity at the junction of the transition curve with main curve
    • B. gradual increase of super-elevation from zero at the tangent point to the specified amount at the junction of the transition curve with main curve
    • C. gradual change of gradient from zero at the tangent point to the specified amount at the junction of the transition curve with main curve
    • D. none of these.
      • Discuss
    • 8. The distance between the point of intersection of an up grade + g1% and downgrade g2% and the highest point of the vertical curve of length L, is

    • Options
    • A.
    • B.
    • C.
    • D. .
      • Discuss
    • 9. If L is in kilometres, the curvature correction is

    • Options
    • A. 58.2 L2 mm
    • B. 64.8 L2 mm
    • C. 74.8 L2 mm
    • D. 78.4 L2 mm.
      • Discuss
    • 10. A standard steel tape of length 30 m and cross-section 15 x 1.0 mm was standardised at 25°C and at 30 kg pull. While measuring a base line at the same temperature, the pull applied was 40 kg. If the modulus of elasticity of steel tape is 2.2 x 106 kg/cm2, the correction to be applied is

    • Options
    • A. - 0.000909 m
    • B. + 0.0909 m
    • C. 0.000909 m
    • D. none of these
      • Discuss

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