Plasticity Index Test Astm D4318

21 Questions  I  By Jjmurphy3
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  • 1. 
    The scale used for the plasticity Index test shall be readable to _________g.
    • A. 

      0.1

    • B. 

      1

    • C. 

      0.01

    • D. 

      0.5


  • 2. 
    When using the dry preparation method the sample is dried back at no more than ________c?
    • A. 

      120c

    • B. 

      60c

    • C. 

      100c

    • D. 

      40c


  • 3. 
    After drying the sample is ground up with a rubber pestle and seperated over __________ sieve?
    • A. 

      # 40

    • B. 

      # 10

    • C. 

      # 4

    • D. 

      # 16


  • 4. 
    After the soil has been pulverized and seperated over the approprite sieve it get moisture condition to ___to______ blows of the liquid limit device.
    • A. 

      20, 30

    • B. 

      25, 35

    • C. 

      30, 40


  • 5. 
    After the sample is mosture conditioned it is covered and allowed to sit a minumum of ______ hours.
    • A. 

      12

    • B. 

      10

    • C. 

      16

    • D. 

      24


  • 6. 
    When performing the liquid limit test spread the soil in the cup so at maximum depth is not more than _______mm.
    • A. 

      10 mm

    • B. 

      5 mm

    • C. 

      20 mm


  • 7. 
    7) The liquid limit cup drop rate is _______.
    • A. 

      1 drop/sec

    • B. 

      2 drops/sec

    • C. 

      4 drops/sec


  • 8. 
    When speading the soil in the cup take care to avoid air bubbles in the soil? True or False?
    • A. 

      True

    • B. 

      False


  • 9. 
    The unused portion of the soil shall be covered with a wet towel during the liquid limit test.
    • A. 

      True

    • B. 

      False


  • 10. 
    Adjust the moisture content so the groove closes for the first point at _____ blows the second
    • A. 

      25 to 35, 20 to 30, 15 to 25

    • B. 

      30 to 40, 20 to 30, 10 to 20

    • C. 

      35 to 40, 20 to 30, 10 to 20


  • 11. 
    Once you have adjusted the moisture content to close at the approximate # of blows a sample semi-logrithmic graph is taken from the cup and the water content is performed on it in accordance with ASTM D2216.
    • A. 

      True

    • B. 

      False


  • 12. 
    The moisture content and number of blows for each of the 3 points are plotted on and where the line crosses_____ blows at the moisture content that is the liquid limit.
    • A. 

      20

    • B. 

      25

    • C. 

      35

    • D. 

      30


  • 13. 
    The liquid limit is reported to the nearest ______.
    • A. 

      Whole number

    • B. 

      0.01

    • C. 

      0.1


  • 14. 
    When rolling out the plastic limit thread it must be on a ground plate at least 12 inches square and 3/8 inches thick.
    • A. 

      True

    • B. 

      False


  • 15. 
    A sample of _____ grams or more is removed from the liquid limit material to run the plastic limits test. 
    • A. 

      15

    • B. 

      10

    • C. 

      20

    • D. 

      40


  • 16. 
    For each plastic limit test roll a ____ to ____ gram ball is removed from the sample and formed into an ellipsoidal ball.
    • A. 

      2.0, 3.0

    • B. 

      2.5, 3.0

    • C. 

      1.5, 2.0


  • 17. 
    Then the elipsoidal ball is rolled between your fingers or palm on the ground glass plate until the thread crumbles at _____ inch diameter.
    • A. 

      1/4

    • B. 

      1/2

    • C. 

      1/8

    • D. 

      1


  • 18. 
    The pieces from the thread are molded into a ball and rolled again or until they will no longer roll into a thread. True or False?
    • A. 

      True

    • B. 

      False


  • 19. 
     The minimum weight of plastic limit test shall be _____ grams.
    • A. 

      10

    • B. 

      20

    • C. 

      8

    • D. 

      6


  • 20. 
    The plastic limit is calcualted by the results of 2 test specimens. True or False?
    • A. 

      True

    • B. 

      False


  • 21. 
    The plasticity Index is calcualted by _________.
    • A. 

      Liquid Limit + Plastic Limit

    • B. 

      Liquid Limit - Plastic Limit

    • C. 

      Plastic Limit - Liquid Limit


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