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concrete 63-93

concrete 63-93
31問 • 2023-09-10
  • David Bobadilla
    • 通報

    scaffold quiz

    scaffold quiz

    David Bobadilla · 13問 · 3年前

    scaffold quiz

    scaffold quiz

    13問 • 3年前
    David Bobadilla

    concrete test #1

    concrete test #1

    David Bobadilla · 13問 · 3年前

    concrete test #1

    concrete test #1

    13問 • 3年前
    David Bobadilla

    Slope test

    Slope test

    David Bobadilla · 7問 · 3年前

    Slope test

    Slope test

    7問 • 3年前
    David Bobadilla

    structure test

    structure test

    David Bobadilla · 13問 · 3年前

    structure test

    structure test

    13問 • 3年前
    David Bobadilla

    Doors/windows

    Doors/windows

    David Bobadilla · 13問 · 3年前

    Doors/windows

    Doors/windows

    13問 • 3年前
    David Bobadilla

    Walls

    Walls

    David Bobadilla · 7問 · 3年前

    Walls

    Walls

    7問 • 3年前
    David Bobadilla

    Masonry

    Masonry

    David Bobadilla · 12問 · 3年前

    Masonry

    Masonry

    12問 • 3年前
    David Bobadilla

    Mortar

    Mortar

    David Bobadilla · 5問 · 3年前

    Mortar

    Mortar

    5問 • 3年前
    David Bobadilla

    Floor/ Foundation

    Floor/ Foundation

    David Bobadilla · 9問 · 3年前

    Floor/ Foundation

    Floor/ Foundation

    9問 • 3年前
    David Bobadilla

    Framing

    Framing

    David Bobadilla · 9問 · 3年前

    Framing

    Framing

    9問 • 3年前
    David Bobadilla

    steel

    steel

    David Bobadilla · 15問 · 3年前

    steel

    steel

    15問 • 3年前
    David Bobadilla

    1 hard questions

    1 hard questions

    David Bobadilla · 26問 · 3年前

    1 hard questions

    1 hard questions

    26問 • 3年前
    David Bobadilla

    concrete 1-31

    concrete 1-31

    David Bobadilla · 31問 · 3年前

    concrete 1-31

    concrete 1-31

    31問 • 3年前
    David Bobadilla

    concrete 32-62

    concrete 32-62

    David Bobadilla · 30問 · 3年前

    concrete 32-62

    concrete 32-62

    30問 • 3年前
    David Bobadilla

    concrete 93-127

    concrete 93-127

    David Bobadilla · 34問 · 3年前

    concrete 93-127

    concrete 93-127

    34問 • 3年前
    David Bobadilla

    問題一覧

  • 1

    Rebar is manufactured in what size increments:

    1/8"

  • 2

    What is the problem in a trench created by high ground water:

    unstable ground

  • 3

    Which of the following has the greatest effect on the lateral form pressures and forces:

    vibratory placement

  • 4

    What does the addition of super plasticizers do to concrete:

    decreases the amount of water for workability

  • 5

    Side wall bracing, shields and supports must be placed into every excavation after how many feet of depth to protect workers:

    5’

  • 6

    OSHA requires cave-in protection for trenches at what minimum depth:

    5 feet

  • 7

    What determines the width of a footer:

    soil bearing capacity

  • 8

    What does overfinishing a concrete slab produce:

    spalling

  • 9

    If the manufacturer is shipping rebar specified to be 22' - 10" long, what is the maximum tolerance for length for the material:

    22'-11"

  • 10

    What is the standard tie safety factor:

    2 to 1

  • 11

    For correct curing, the internal humidity of concrete placement should be kept to what maximum level:

    80%

  • 12

    A concrete surface void usually less than 0.6 inch in diameter is referred to as a:

    bughole

  • 13

    Which of the following is required as ID on any reinforcing bars:

    producers mill, size of bar, type of steel and if Grade 60

  • 14

    The top of foundation walls should be a minimum of how far above the finish ground level:

    6 inches

  • 15

    The highest degree of water tightness in concrete is obtained how:

    low water/cement ration

  • 16

    What is the name for the tie used to secure horizontal bars to vertical column bars:

    saddle

  • 17

    OSHA requires scaffolding with a minimum horizontal dimension of 45 inches to have guardrails on all sides and ends if above what elevation:

    10 feet

  • 18

    Stepped footings are required for ground sloping at what:

    10%

  • 19

    The vibratory placement of air entrained concrete causes which of the following:

    considerable loss of air

  • 20

    Step forms should be used on ground sloping more than:

    1:10

  • 21

    If a worker provides his own personal safety protection, who is responsible if an injury occurs to that employee:

    the emplover

  • 22

    Why are wood forms oiled or coated with laquer prior to using for concrete placement:

    to prevent water absorption by the wood

  • 23

    If a datum point is 100.00 and the top of the footing is 96.00 with the foundation at 8'4" above the footing, what is the difference in elevation between the datum point and the top of the foundation wall:

    4'4"

  • 24

    What is the maximum number of mixing revolutions for concrete according to ASTM standard 94:

    300

  • 25

    Rebar in concrete placed in concrete on ground with forms must have what minimum cover with concrete from the ground:

    2"

  • 26

    What determines the depth of a footer:

    depth of frost line

  • 27

    If rebar is delivered to the jobsite with light surface rust, what must be done prior to its use:

    nothing - use as is

  • 28

    Initial mixing of the concrete materials requires what minimum amount of mixing time for up to 1 cubic yard of material:

    1 minute

  • 29

    What is the first leveling process for newly placed concrete:

    screeding

  • 30

    If digging for a footing that is 12" wide, 8' deep and 100' long, how many cubic yards of material will be excavated, not including a swell factor for removed dirt:

    30

  • 31

    What is the weight of a cubic foot of concrete:

    150 pounds