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  • Question
  • In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by


  • Options
  • 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.

  • Correct Answer
  • changing the cardinal points, i.e. substituting N for S and E for W and vice-versa 


  • Surveying problems


    Search Results


    • 1. Diopter is the power of a lens having a focal length of

    • Options
    • A. 25 cm
    • B. 50 cm
    • C. 75 cm
    • D. 100 cm
    • E. 125 cm
    • Discuss
    • 2. In chain surveying field work is limited to

    • Options
    • A. linear measurements only
    • B. angular measurements only
    • C. both linear and angular measurements
    • D. all the above.
    • Discuss
    • 3. The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to

    • Options
    • A. the distance between the zero of gradient and the foot of the staff
    • B. twice the distance between the zero of graduation and the foot of the staff
    • C. thrice the distance between the zero of graduation and the foot of the staff
    • D. none of the above.
    • Discuss
    • 4. Hydrographic surveys deal with the mapping of

    • Options
    • A. large water bodies
    • B. heavenly bodies
    • C. mountaineous region
    • D. canal system
    • E. movement of clouds.
    • Discuss
    • 5. Closed contours of decreasing values towards their centre, represent

    • Options
    • A. a hill
    • B. a depression
    • C. a saddle or pass
    • D. a river bed.
    • Discuss
    • 6. If the radius of a simple curve is R, the length of the chord for calculating offsets by the method of chords produced, should not exceed.

    • Options
    • A. R/10
    • B. R/15
    • C. R/20
    • D. R/25.
    • Discuss
    • 7. A soil has bulk density 2.30 g/cm3 and water content 15 per cent, the dry density of the sample, is

    • Options
    • A. 1.0 g/cm2
    • B. 1.5 g/cm3
    • C. 2.0 g/cm3
    • D. 2.5 g/cm3
    • Discuss
    • 8. A coarse-grained soil has a voids ratio 0.75, and specific gravity as 2.75. The critical gradient at which quick sand condition occurs, is

    • Options
    • A. 0.25
    • B. 0.50
    • C. 0.75
    • D. 1.00
    • Discuss
    • 9. Rankine's theory of active earth pressure assumes

    • Options
    • A. soil mass is homogeneous, dry and cohesionless
    • B. ground surface is a plane which may be horizontal or inclined
    • C. back of the wall is vertical and smooth
    • D. wall yields about the base
    • E. all the above.
    • Discuss
    • 10. Back fill with a sloping surface exerts a total active pressure Pa on the wall of height H and acts at

    • Options
    • A. H/4 above the base parallel to base
    • B. H/2 above the base parallel to base
    • C. H/3 above the base parallel to base
    • D. H/5 above the base parallel to base.
    • Discuss


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