Reinforced Concrete Test 2

26 Questions | Total Attempts: 4790

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Reinforced Concrete Test 2

This test takes 1 hour to complete.


Questions and Answers
  • 1. 
    Cylinders being transported to the lab should be _______. 
    • A. 

      Cushioned

    • B. 

      Upright and braced

    • C. 

      Horizontal and stacked

    • D. 

      60 – 80

  • 2. 
    When rodding the final layer, the rod should penetrate. 
    • A. 

      1 inch into the first layer

    • B. 

      1 inch into the second layer

    • C. 

      4 inches

    • D. 

      2 inches

  • 3. 
    Steel for welded reinforcing is best described by ASTM ________.
    • A. 

      A615

    • B. 

      A128

    • C. 

      A480

    • D. 

      A706

  • 4. 
    When approved by the building official; water may be present at the place of deposit when ________. 
    • A. 

      The concrete is 5000 psi

    • B. 

      Footings are being poured in the rain

    • C. 

      A tremie is used

    • D. 

      The concrete is type III with minimum F’c of 2500 psi

  • 5. 
    Precautions for cold weather concrete should be followed when the mean daily temperature falls to ______degrees Fahrenheit. 
    • A. 

      32

    • B. 

      40

    • C. 

      45

    • D. 

      50

  • 6. 
    The upper most bar rank indicates ______.
    • A. 

      Mill

    • B. 

      Grade

    • C. 

      Steel type

    • D. 

      Size

  • 7. 
    Concrete samples may only be rodded when the slump is greater than ______ inches. 
    • A. 

      4

    • B. 

      2

    • C. 

      3

    • D. 

      1

  • 8. 
    For six inch cylinders ______ layers should be rodded ______ times each. 
    • A. 

      4, 50

    • B. 

      2, 25

    • C. 

      3, 25

    • D. 

      2, 20

  • 9. 
    When assembling rebar, crossing bars should not be _______.
    • A. 

      Welded

    • B. 

      Held with plastic clips

    • C. 

      Galvanized tie wire

    • D. 

      Stainless steel tie wire

  • 10. 
    Final curing temperature for cylinders is ____ degrees Fahrenheit. 
    • A. 

      70 - 75

    • B. 

      73 +/- 6

    • C. 

      73 +/- 3

    • D. 

      60 – 80

  • 11. 
    The tolerance on a specified 3 inch slump when the project specifications are not written as “maximum” or “not to exceed” requirement is _______ inch(es).
    • A. 

      +/- 1/2

    • B. 

      +/- 1

    • C. 

      +/- 1 1/2

    • D. 

      +/- 2 1/2

  • 12. 
    What is the minimum cover (in inches) for reinforcement in concrete cast against and permanently exposed to earth?
    • A. 

      2

    • B. 

      3

    • C. 

      1

    • D. 

      1/2

  • 13. 
    Initial curing temperature for cylinders is ____ degrees Fahrenheit. 
    • A. 

      Between 60 and 80

    • B. 

      50 - 90

    • C. 

      70 - 90

    • D. 

      70 – 76

  • 14. 
    During a 400 yard placement, ______ samples for strength tests are required.
    • A. 

      2

    • B. 

      3

    • C. 

      4

    • D. 

      8

  • 15. 
    The concrete should be sampled after ________.
    • A. 

      All water has been added (adjustment water)

    • B. 

      Within 1 hour of the addition of water to the batch

    • C. 

      Within 300 drum revolutions on the mixer

    • D. 

      Within 30 minutes of arrival at site

  • 16. 
    Concrete represented by cores is acceptable if the average of three cores is _____ percent of F’c and no core falls below ______ percent of F’c.
    • A. 

      90, 80

    • B. 

      100, 85

    • C. 

      100, 75

    • D. 

      85, 75

  • 17. 
    Strength tests of field cured cylinders do not _____.
    • A. 

      Indicate deficiencies in protection and curing

    • B. 

      Form the basis for acceptance or rejection of F’c

    • C. 

      Allow for guidance for shoring and reshoring

    • D. 

      Determine removal times for forms

  • 18. 
    According to the building code, the minimum depth of footings (except category    R-3) is ________ inches. 
    • A. 

      6

    • B. 

      8

    • C. 

      10

    • D. 

      12

  • 19. 
    Concrete shall be thoroughly consolidated by ______. 
    • A. 

      Internal vibration

    • B. 

      External vibration

    • C. 

      Suitable means

    • D. 

      When reinforcement spacing exceeds 6db

  • 20. 
    Seismic hooks with a 135 degree bend require a minimum extension of _____db but not less than _____ inches. 
    • A. 

      12, 2

    • B. 

      6, 3

    • C. 

      8, 3

    • D. 

      6, 2

  • 21. 
    For bundled bars, minimum concrete cover shall be equal to the equivalent diameter of the bundle, but need not be greater than ____ in.; except for concrete cast against and permanently exposed to earth, where minimum cover shall be 3 inches.
    • A. 

      2

    • B. 

      1

    • C. 

      3/4

    • D. 

      3

  • 22. 
    Partially embedded reinforcement may be field bent when _______. 
    • A. 

      Preheating is used

    • B. 

      Necessary for adjacent work

    • C. 

      Shown on design drawings

    • D. 

      Minimum bend diameters are maintained

  • 23. 
    In hot weather consideration of _______ is least important. 
    • A. 

      Schedule

    • B. 

      Application of curing compound

    • C. 

      Fog sprayers and wind curtains

    • D. 

      Wetting the coarse aggregate stockpile

  • 24. 
    At footings, the splice between a #14 bar and a #18 bar in compression should be _______.
    • A. 

      Not allowed

    • B. 

      Lap splice

    • C. 

      Mechanical connection

    • D. 

      Welded

  • 25. 
    What is the minimum cover (in inches) for primary reinforcement in a concrete beam not exposed to weather or in contact with the ground?
    • A. 

      1 ½

    • B. 

      2

    • C. 

      1

    • D. 

      3/4