Geotechnical Lab G1: Standard Proctor Test Procedure
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Questions and Answers

What is the purpose of adding 4% water to the dry soil sample in the Standard Proctor Test?

  • To determine the moisture content
  • To decrease the dry density
  • To increase the dry density
  • To soften the soil particles (correct)

    • In the modified test, how many layers is the soil placed in the mould?

  • Three layers
  • Four layers
  • Five layers (correct)
  • Two layers

    • What is the purpose of applying 25 blows evenly on the surface using a 4.5kg hammer in the modified test?

  • To determine the moisture content
  • To loosen the soil
  • To compact the soil (correct)
  • To soften the soil particles

    • What happens to the dry density with the addition of water in the Standard Proctor Test?

    <p>Increases until it reaches OMC, then decreases</p> Signup and view all the answers

    What does OMC stand for in the context of the Standard Proctor Test?

    <p>Optimum Moisture Content</p> Signup and view all the answers

    What is the purpose of taking soil samples from the top and bottom of the mould in the Standard Proctor Test?

    <p>To check for uniformity of compaction</p> Signup and view all the answers

    What is the formula for relative compaction?

    <p>SDD / LDD</p> Signup and view all the answers

    Which method is preferred for determining the field density of soil?

    <p>Core cutter method</p> Signup and view all the answers

    What is the maximum dry density (MDD) obtained from the StrucX website?

    <p>2179 kg/m3</p> Signup and view all the answers

    What does the permeability test help in estimating?

    <p>Seepage quantity under hydraulic conditions</p> Signup and view all the answers

    What does Darcy law express?

    <p>Velocity in terms of hydraulic pressure gradient</p> Signup and view all the answers

    What does Reynolds number (Rn) represent?

    <p>Ratio of inertia force to viscous force</p> Signup and view all the answers

    What is the influence of relative roughness on the friction factor (f)?

    <p>Decreases with relative roughness</p> Signup and view all the answers

    What increases as water power increases in a Pelton impulse turbine?

    <p>Torque</p> Signup and view all the answers

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