Reinforced Concrete Practice Test 1

30 Questions  I  By Dduarte
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  • 1. 
    A strength test shall be the average of the strengths of ________ cylinders made from the same sample of concrete and tested at ____ days or at test age designated for determination of f’c.
    • A. 

      3, 28

    • B. 

      1, 56

    • C. 

      4, 56

    • D. 

      2, 28


  • 2. 
    Beams, girders, or slabs supported by columns or walls shall not be cast or erected until concrete in the vertical support members is no longer plastic. 
    • A. 

      True

    • B. 

      False


  • 3. 
    A standard hook has a ___ degree bend plus 12 db (bar diameters) extension at the free end of bar
    • A. 

      180

    • B. 

      90

    • C. 

      45

    • D. 

      30


  • 4. 
    The minimum clear spacing between parallel bars in a layer shall be db, but not less than ______ inch.
    • A. 

      1

    • B. 

      1/2

    • C. 

      3/4

    • D. 

      1/4


  • 5. 
    All nonprestressed bars shall be enclosed by lateral ties, at least No. 3 in size for longitudinal bars No. ___ or smaller, and at least No. 4 in size for No. 11, No. 14, No. 18 and bundled longitudinal bars.
    • A. 

      8

    • B. 

      10

    • C. 

      11

    • D. 

      12


  • 6. 
    Except for ________ steel, steel reinforcement with rust, mill scale, or a combination of both shall be considered satisfactory, provided the minimum dimensions (including height of deformations) and weight of a hand-wire-brushed test specimen comply with applicable ASTM specifications referenced in 3.5
    • A. 

      Prestressing

    • B. 

      Anchor bolt

    • C. 

      Structural

    • D. 

      Tie wire


  • 7. 
    When total quantity of a given class of concrete is less than ________  cubic yards, strength tests are not required when evidence of satisfactory strength is submitted to and approved by the building official.
    • A. 

      20

    • B. 

      75

    • C. 

      50

    • D. 

      10


  • 8. 
    Tolerance for longitudinal location of bends and ends of reinforcement shall be +/- _____ inches
    • A. 

      2

    • B. 

      3

    • C. 

      1

    • D. 

      1/2


  • 9. 
    Concrete in an area represented by core tests shall be considered structurally ________ if the average of three cores is equal to at least 85 percent of f’c and if no single core is less than ______ percent of f’c.
    • A. 

      Adequate, 85

    • B. 

      Adequate, 75

    • C. 

      Inadequate, 75

    • D. 

      Adequate, 85


  • 10. 
    Form supports for prestressed concrete members shall not be removed until sufficient ________ has been applied to enable prestressed members to carry their dead load and anticipated construction loads. 
    • A. 

      Prestressing

    • B. 

      Post tensioning

    • C. 

      Curing

    • D. 

      Force


  • 11. 
    In reference to removal of forms, shores, and reshoring, sufficient strength shall be demonstrated by ________ _________ considering proposed loads, strength of forming and shoring system, and concrete strength data.
    • A. 

      Compressive strength

    • B. 

      Construction schedule

    • C. 

      Contractors math

    • D. 

      Structural analysis


  • 12. 
    In reference to cold weather requirements all concrete materials and all reinforcement, forms, fillers, and ground with which concrete is to come in contact shall be free from ______. 
    • A. 

      Ice

    • B. 

      Frost

    • C. 

      Both a and b

    • D. 

      Snow


  • 13. 
    Conduits, pipes, and sleeves shall be permitted to be considered as replacing structurally in compression the displaced concrete provided they are of uncoated or galvanized iron or ______ not thinner than standard schedule 40 steel pipe.
    • A. 

      Pvc

    • B. 

      Steel

    • C. 

      Aluminum

    • D. 

      Tin


  • 14. 
    Samples for strength tests of each class of concrete placed each day shall be taken not less than once a day, nor less than once for each _______ cubic yards of concrete.
    • A. 

      170

    • B. 

      150

    • C. 

      100

    • D. 

      75


  • 15. 
    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


  • 16. 
    In reference to conduits and pipes embedded in concrete, conduit/pipe shall not be larger in outside dimension than ____ the overall thickness of slab, wall, or beam in which they are embedded.
    • A. 

      1/3

    • B. 

      1/2

    • C. 

      1/4

    • D. 

      3/4


  • 17. 
    Procedures for protecting and curing concrete shall be improved when strength of field-cured cylinders at test age designated for determination of f’c is less than _____ percent of that of companion _________-cured cylinders.  
    • A. 

      90, field

    • B. 

      50, field

    • C. 

      75, laboratory

    • D. 

      85, laboratory


  • 18. 
    Concrete (other than high-early strength) shall be maintained above _____ degrees F and in a moist condition for at least the first _____ days after placement, except when cured in accordance with 5.11.3
    • A. 

      32, 2

    • B. 

      40, 3

    • C. 

      40, 7

    • D. 

      50, 7


  • 19. 
    Water shall be ______ from place of deposit before concrete is placed unless a ______ is to be used or unless otherwise permitted by the building official.
    • A. 

      Removed, pump

    • B. 

      Added, pump

    • C. 

      Removed, tremie

    • D. 

      Added, tremie


  • 20. 
    For the strength level of an individual class of concrete to be considered satisfactory, no individual strength test can fall below f’c by more than ______ psi when f’c is 5000 psi or less.
    • A. 

      500

    • B. 

      100

    • C. 

      1000

    • D. 

      250


  • 21. 
    Clear spacing between spirals shall not exceed ___ in., nor be less than ___ in.
    • A. 

      1, 2

    • B. 

      3,1

    • C. 

      2,1

    • D. 

      1,3


  • 22. 
    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


  • 23. 
    For cast-in-place construction, size of spirals shall not be less than ____ in. diameter.
    • A. 

      1/2

    • B. 

      3/8

    • C. 

      1/4

    • D. 

      3/4


  • 24. 
    During hot weather, proper attention shall be given to ingredients, production methods, handling, placing, protection, and curing to prevent excessive concrete temperatures or water evaporation that could impair required _______ or serviceability of the member or structure. 
    • A. 

      Life

    • B. 

      Strength

    • C. 

      Durability

    • D. 

      Aesthetics


  • 25. 
    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


  • 26. 
    In spirally reinforced or tied reinforced compression members, clear distance between longitudinal bars shall be not less than 1.5db nor less than ______  in. 
    • A. 

      1 ½

    • B. 

      2

    • C. 

      ½

    • D. 

      1


  • 27. 
    Bars larger than No. ____ shall not be bundled in beams.
    • A. 

      12

    • B. 

      10

    • C. 

      8

    • D. 

      11


  • 28. 
    Reinforcement partially embedded in concrete shall not be field _______, except as shown on the design drawings or permitted by the engineer. 
    • A. 

      Bent

    • B. 

      Modified

    • C. 

      Cut

    • D. 

      Welded


  • 29. 
    What is the tolerance on minimum concrete cover for an 8 inch thick reinforced concrete wall?
    • A. 

      -1/2 inch

    • B. 

      -3/4 inch

    • C. 

      -3/8 inch

    • D. 

      -1/4 inch


  • 30. 
    High-early-strength concrete shall be maintained above ______ degrees F and in a moist condition for at least the first ____ days, except when cured in accordance with 5.11.3
    • A. 

      50, 3

    • B. 

      50, 7

    • C. 

      40, 7

    • D. 

      40, 3


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