Electrical Resistivity Method

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Electrical Resistivity Method

This Quiz contains some of the Basic Questions on Electrical Resistivity Method In Geophysics. Hope so You will Enjoy the Quiz. . . . And It helps to improve ur knowledge. . With Best Wishes,,,,, Kapil Tyagi


Questions and Answers
  • 1. 
    The electrical conduction mechanism in Sedimentary rocks is usually :
    • A. 

      Pyroelectric

    • B. 

      Electronic

    • C. 

      Electrolytic

    • D. 

      Dielectric

  • 2. 
    Which electrode configuration has the maximum depth of investigation for a homogeneous earth ????
    • A. 

      Three electrode

    • B. 

      Two electrode

    • C. 

      Wenner

    • D. 

      Schlumberger

  • 3. 
    In reference to the Geometric Factor , Which among the following is true ???
    • A. 

      It varies for Profiling but remains constant for sounding

    • B. 

      It varies for both Profiling and sounding

    • C. 

      It varies for Sounding but remains constant for Profiling

    • D. 

      It remains constant for both Profiling and Sounding

  • 4. 
    Which 4-electrode configuration is best suited to Archaeological Investigations ???
    • A. 

      Pole Pole

    • B. 

      Schlumberger

    • C. 

      Wenner

    • D. 

      Dipole Dipole

  • 5. 
    Principle of Reciprocity states that Resistivity value will be the same if :
    • A. 

      Wenner array is converted into schlumberger array system

    • B. 

      Position of Current and Potential electrodes are interchanged with each other

    • C. 

      One current and one potential electrode are interchanged

    • D. 

      None of the above

  • 6. 
    Priciple of Reciprocity is applicable for both homogeneous and non-homogeneous earth .
    • A. 

      True

    • B. 

      False

  • 7. 
    The resistivity of acidic igneous rocks is less than resistivity of basic igneous rocks .
    • A. 

      True

    • B. 

      False

  • 8. 
    The resistivity along a bedding plane is less than the resistivity across it  .
    • A. 

      True

    • B. 

      False

  • 9. 
    Which electrode configuration acquires maximum vertical resolution ??
    • A. 

      Schlumberger

    • B. 

      Pole Dipole

    • C. 

      Half Wenner

    • D. 

      Wenner

  • 10. 
    The value of cofficient of anisotropy lies between generally :
    • A. 

      1 to 2

    • B. 

      0 to 1

    • C. 

      0.1 to 0.5

    • D. 

      3 to 5

  • 11. 
    Electrical Resistivity Method is generally used :
    • A. 

      In the investigation of geological structure

    • B. 

      In engineering and groundwater investigations

    • C. 

      For tracking dykes

    • D. 

      For locating ore bodies

  • 12. 
    The order of resistivity of clay is :
    • A. 

      10 ohm-m

    • B. 

      100 ohm-m

    • C. 

      1000 ohm-m

    • D. 

      5000 ohm-m

  • 13. 
    What is the Formation Factor , given the resistivity of matrix as 100 ohm-m and the resistivity of water as 20 ohm-m ??
    • A. 

      0.2

    • B. 

      2.5

    • C. 

      2.23

    • D. 

      5

  • 14. 
    In a 4-layer subsurface model, which combination of A-, H-, K- and Q- type electrical resistivity sounding curves is NOT possible?
    • A. 

      HA

    • B. 

      AK

    • C. 

      HQ

    • D. 

      KQ

  • 15. 
    For a three-layered earth with resistivities ρ1, ρ2, and ρ3, and corresponding thicknesses h1, h2, and h3 respectively, the quantity (h1/ρ1) + (h2/ρ2) + (h3/ρ3) stands for
    • A. 

      Transverse Resistance

    • B. 

      Longitudnal Conductance

    • C. 

      Apparent Conductance

    • D. 

      Longitudinal Resistance

  • 16. 
    Resistivity of conducting metallic sulphides vary from :
    • A. 

      4 to 800 ohm-m

    • B. 

      300 to 500 ohm-m

    • C. 

      0.00001 to 0.1 ohm-m

    • D. 

      300 to 10000 ohm-m

  • 17. 
    Resistivity Profiling and sounding are taken at __________ angle to the strike respectively .
    • A. 

      90 degree and 0 degree

    • B. 

      0 degree and 90 degree

    • C. 

      45 degree and 60 degree

    • D. 

      0 degree and 45 degree

  • 18. 
    The formation factor is related to :
    • A. 

      Resistivity of Rock

    • B. 

      Permeability

    • C. 

      Porosity of Rock

    • D. 

      Resistivity of fluid in the rock

  • 19. 
    The limiting depth of electrical sounding is :
    • A. 

      more than 300 m

    • B. 

      More than 1 km

    • C. 

      More than 5 km

    • D. 

      More than 10 km

  • 20. 
    The shape of a VES curve over a three layer sequence comprising : moist soil (top) , fresh water saturated coarse sand (middle) and Clay (bottom) is :
    • A. 

      A Type

    • B. 

      H Type

    • C. 

      K Type

    • D. 

      Q Type

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