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Civil Engineering :: UPSC Civil Service Exam Questions

  1. On which one of the following factors, does strength of concrete depend primarily ?

  2. A.
    Quality of coarse aggregate
    B.
    Quality of fine aggregate
    C.
    Fineness of cement
    D.
    Water-cement ratio

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  3. When a load crosses a through type Pratt truss in the direction left to right, the nature of force in any diagonal member in the left half of the span would :

  4. A.
    change from compression to tension
    B.
    change from tension to compression
    C.
    always be compression
    D.
    always be tension

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  5. The double-line field book is most commonly used for recording

  6. A.
    precise work
    B.
    ordinary chain survey work
    C.
    large-scale plotting work
    D.
    small-scale plotting work

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  7. The wood preservative "Creosote" is derived from

  8. A.
    wood or coal
    B.
    acidic cupric chromate
    C.
    chromated zinc chloride
    D.
    pentachlorophenol

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  9. To determine the length of a bridge proposed to be built across a wide river, the surveying method of choice would be

  10. A.
    tacheometry
    B.
    chain surveying
    C.
    hydrographic surveying
    D.
    triangulation

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  11. Which one of the following statements is correct ?
    Maximum service volume of a road is defined as the total number of vehicles that

  12. A.
    can pass a given point in a specified period of time
    B.
    can be accomodated on a unit length of road
    C.
    can pass a given point in unit time
    D.
    None of the above three

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  13. The pressure gradient in the direction of flow is equal to the :

  14. A.
    Shear gradient parallel to the direction of flow
    B.
    Shear gradient normal to the direction of flow
    C.
    Velocity gradient parallel to the direction of flow
    D.
    Velocity gradient normal to the direction of flow

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  15. When the strain in a material increases with time under sustained constant stress, the phenomenon is known as

  16. A.
    Strain hardening
    B.
    Hysteresis
    C.
    Creep
    D.
    Visco-elastici

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  17. An upward hydraulic gradient i of a certain magnitude will initiate the phenomenon of boiling in granular soils. The magnitude of this gradient is

  18. A.
    0 ≤ i ≤ 0.5
    B.
    0.5 < t < 1.0
    C.
    i ≅ 1.0
    D.
    l < i ≤ 2

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  19. Well-graded dense saturated sands have high shear strength because :

  20. A.
    Such sands have a better grade (superior type) of sand grains resulting in higher strength
    B.
    Such sands have lower water content, which increases shear strength
    C.
    Such sands have better interlocking of grains, higher inter-particle contacts and higher inter-particle frictional resistance resulting in higher strength.
    D.
    Presence of water in such sands induces capillary pressure generating higher inter-granular stresses, which generate apparent cohesion and hence higher shear strength.

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