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ACI 318 - 14 Flashcards

1
Q
  1. The load factor on live load L shall be permitted to be reduced to 0.5 except for _______ .

A. Storage facilities
B. Garages
C. Commercial buildings
D. Grocery stores

A
  1. B 5.3.3
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2
Q
  1. Records of inspection should be preserved for at least after the completion of the project.

A. 3 months
B. 6 months
C. 1 year
D. 2 years

A
  1. D 26.13.2.2
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3
Q
  1. A _____ is a formed, sawed, or tooled groove in a concrete structure to create a weakened plane and regulate the location of cracking resulting from the dimensional change of different parts of the structure.

A. Contraction joint
B. Isolation joint
C. Embedment length
D. Construction joint

A
  1. A Pg. 35
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4
Q
  1. Structural concrete in which internal stresses have been introduced to reduce potential tensile stresses in concrete resulting from loads is called .

A. Reinforced concrete
B. Prestressed concrete
C. Precast concrete
D. Plain concrete

A
  1. B Pg. 34
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5
Q
  1. A material encasing prestressing steel to prevent bonding of the prestressing steel with the surrounding concrete, to provide corrosion protection, and to contain the corrosion inhibiting coating is
    called .

A. Drop panel
B. Shear cap
C. Sheathing
D. None of the Above

A
  1. C Pg. 40
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6
Q
  1. The nominal maximum size of coarse aggregate shall not be larger than:

A. 1/4 the narrowest dimension between sides of forms
B. 1/3 the depth of slabs
C. 7/8th the minimum clear spacing between individual reinforcing bars or wires, bundle of bars, individual tendons, bundled tendons, or ducts.
D. All of the Above

A
  1. B 26.4.2.1(a)
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7
Q
  1. Excessive impurities in concrete mixing water may affect setting time, concrete strength, and volume stability, and may also cause .

A. Efflorescene
B. Spalling
C. Scaling
D. Crazing

A
  1. A R26.4.1.3
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7
Q
  1. Which exposure category applies to reinforced and prestressed concrete exposed to conditions that require additional protection against corrosion of reinforcement?

A. Exposure category F
B. Exposure category S
C. Exposure category C
D. Exposure category P

A
  1. C R19.3.1
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8
Q
  1. Calcium chloride or admixtures containing chloride from sources other than impurities in admixture ingredients shall be used in .

A. Prestressed concrete
B. Concrete containing embedded aluminum
C. Concrete cast against stay-in-place galvanized steel forms
D. None of the Above

A
  1. D 26.4.1.4.1(c)
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9
Q
  1. Samples for strength tests of each class of concrete placed the each day shall be taken not less than once a day, nor less than once for each of concrete, nor less than once for each of surface area for slabs or walls.

A. 100 𝑦𝑑3; 2,500 𝑓𝑡2
B. 125 𝑦𝑑3; 3,000 𝑓𝑡2
C. 150 𝑦𝑑3; 5,000 𝑓𝑡2
D. 200 𝑦𝑑3; 5,000 𝑓𝑡2

A
  1. C 26.12.2.1(a)
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9
Q
  1. Design of precast concrete members and connections shall include loading and restraint conditions from initial fabrication to end use in the structure, including _______ removal, storage, transportation, and erection.

A. Cement
B. Steel
C. Tendon
D. Form

A
  1. D 4.12.1.1
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10
Q
  1. A strength test shall be the average of the strengths of at least two 6 by 12 in. cylinders or at least three 4 by 8 in. cylinders made from the same sample of concrete and tested at ____ days or at test age designated for determination of 𝑓′𝑐.

A. 7
B. 14
C. 28
D. 30

A
  1. C 26.12.1.1(a)
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11
Q
  1. At least two No. 5 bars shall be provided around all window and door openings and such bars shall extend at least in. beyond the corners of openings.

A. 4
B. 6
C. 12
D. 24

A
  1. D 14.6.1
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12
Q
  1. The use of only ________percent of the full factored live load for maximum moment loading patterns is based on the fact that maximum negative and maximum positive live load moments cannot occur simultaneously and that redistribution of maximum moments in thus possible before failure occurs.

A. 25
B. 35
C. 55
D. 75

A
  1. D R6.4.3.3
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13
Q
  1. is a full-depth pipe used in accordance with accepted procedures for placing concrete under water.

A. Chute
B. Tremie
C. Steel pile pipe
D. Strut

A
  1. B R26.5.2.1(b)
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14
Q
  1. Concrete, other than high-early strength, shall be maintained above ˚F and in a moist condition for at least the first days after placement.

A. 32; 3 days
B. 35; 7 days
C. 45; 3 days
D. 50; 7 days

A
  1. D 26.5.3.2(a)
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15
Q
  1. High-early strength concrete shall be maintained above 50˚F and in a moist condition for at least the first
    days after placement.

A. 3
B. 5
C. 7
D. 28

A
  1. A 26.5.3.2(b)
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16
Q
  1. is a specification for ready mixed concrete whereby materials are primarily measured by mass (weight) and production is by batches.

A. ASTM C685
B. ASTM C94
C. ACI 423.7
D. ACI 304R

A
  1. B R26.5.1.1(d)
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17
Q
  1. Which of the following construction loads shall be considered in the design of formwork?

A. Vertical, horizontal, impact
B. Vertical, horizontal, dead
C. Vertical, horizontal, live
D. Vertical, horizontal, service

A
  1. A 26.11.1.2(a)(4)
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18
Q
  1. Use of a stirrup bar size No. ______or smaller for the 90, 135, or 180-degree standard stirrup hook will permit multiple bending on standard stirrup bending equipment.

A. 3
B. 5
C. 6
D. 8

A
  1. B R25.3.2
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19
Q
  1. Traverse reinforcement is not required in precast, prestressed walls equal to or less than_____ in width because this width is less than that in which shrinkage and temperature stresses can build up to a magnitude requiring transverse reinforcement.

A. 12
B. 16
C. 18
D. 24

A
  1. A R11.6.1
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20
Q
  1. Specified concrete cover for pipes, conduits, and fittings shall not be less than in. for concrete exposed to earth.

A. ¾
B. 1
C. 1-1/2
D. 2

A
  1. C 20.7.5
21
Q
  1. No liquid, gas, or vapor, except water not exceeding ˚F nor psi pressure, shall be placed in the pipes until the concrete has attained its design strength.

A. 90; 30
B. 100; 40
C. 90; 50
D. 100; 60

A
  1. C 26.8.2 (d)
22
Q
  1. Specified concrete cover for pipes, conduits, and fittings shall not be less than in. for concrete not exposed to weather or in contact with ground.

A. ¾
B. 1
C. 1-1/2
D. 2

A
  1. A 20.7.5
23
Q
  1. Concrete shall not be pumped through pipe made of .

A. Steel
B. Aluminum
C. Cast Iron
D. Copper

A
  1. B 26.5.2.1(e)
24
Q
  1. Construction joint in girders shall be offset a minimum distance of times the width of intersecting beams.

A. 2
B. 3
C. 4
D. 5

A
  1. A 26.5.6.2(c)
25
Q
  1. For spiral or wire 5/8 in. diameter or larger, a minimum of spacer (s) should be used for spirals 24
    in. or less in diameter.

A. One
B. Two
C. Three
D. Four

A
  1. C R26.6.2.2(b)
26
Q
  1. The overall depth of pile cap shall be selected such that the effective depth of bottom reinforcement is at least inches.

A. 12
B. 14
C. 18
D. 24

A
  1. A 13.4.2.1
27
Q
  1. Bars larger than No. shall not be bundled in beams

A. 6
B. 8
C. 11
D. 14

A
  1. C 25.6.1.3
28
Q
  1. A (An) shall be installed in concrete having a minimum age of 21 days at time of anchor installation.

A. Undercut anchor
B. Cast-in anchor
C. Adhesive anchor
D. Expansion anchor

A
  1. C 17.1.2
29
Q
  1. Door and window placements in structural walls sometimes lead to narrow vertical wall segments that are considered to be .

A. Wall columns
B. Wall piers
C. Wall posts
D. None of the above.

A
  1. B R18.10.8
30
Q
  1. The ratio of the actual tensile strength to the actual yield strength is at least of the reinforcement.

A. 1.10
B. 1.15
C. 1.20
D. 1.25

A
  1. D 20.2.2.5
31
Q
  1. Steel-encased concrete sections should have a steel wall thickness to attain the longitudinal yield stress before buckling outward.

A. Of 6 inches
B. Of 8 inches
C. Of 10 inches
D. Large enough

A
  1. D R10.3.1.6
32
Q
  1. Welded wire reinforcement can be used for and ties.

A. hoops
B. stirrups
C. crossties
D. hooks

A
  1. B R25.3.3
33
Q
  1. Lap splices shall not be used for bars larger than , except as provided in 25.5.5.3.

A. No. 6
B. No. 8
C. No. 11
D. No. 5

A
  1. C 25.5.1.1
34
Q
  1. Longitudinal and transverse integrity ties shall be provided in floor and roof systems to provide a nominal tensile strength of lb per foot of width or length.

A. 2500
B. 1500
C. 2000
D. 3500

A
  1. B 16.2.5.1(a)
35
Q
  1. The level lap splice requirements encourage splicing bars at points of minimum stress and staggering splices to improve behavior of critical details.

A. One
B. Two
C. Three
D. Four

A
  1. B R25.5.2.1
36
Q
  1. One of the foundation elements required for detached one and two-family dwellings not exceeding three stories and constructed with stud bearing walls is that the thickness of exterior basement walls and foundation walls shall not be less than inches.

A. 7 1/2
B. 10
C. 6
D. 12

A
  1. A 14.1.4
37
Q
  1. For post-tensioned anchorage zone design, a load factor of shall be applied to the maximum prestressing reinforcement jacking force.

A. 1.0
B. 1.2
C. 1.4
D. 1.5

A
  1. B 5.3.12
38
Q
  1. The strength corresponding to the anchoring device or a major component of the device sliding out from the concrete without breaking out a substantial portion of the surrounding concrete is?

A. Anchor reinforcement
B. Anchor pullout strength
C. Adhesive anchor
D. Anchor

A
  1. B 32
39
Q
  1. Concrete shall be placed .

A. At a rate to provide an adequate supply of concrete at the location of placement
B. Without segregation or loss of materials
C. At a rate so concrete at all times has sufficient workability such that it can be consolidated by the intended methods
D. All of the above

A
  1. D 26.5.2.1 (f)
40
Q
  1. For bearing walls, the footing thickness shall be at least .

A. 6”
B. 8”
C. 10”
D. 12”

A
  1. B 14.3.2.1
41
Q
  1. Solid slabs or one-way joist systems built integrally with supports, with clear spans not more than
    , shall be permitted to be analyzed as continuous members on knife-edge supports with spans equal to the clear spans of the member and width of support beams otherwise neglected.

A. 8 ft
B. 10 ft
C. 12 ft
D. 14 ft

A
  1. B 6.6.2.3
42
Q
  1. The basis for minimum shear reinforcement for one-way slabs is the same as that for .

A. Beams
B. Columns
C. Footings
D. Solid slabs

A
  1. A R7.6.3
43
Q
  1. A , where used to increase the critical section for shear at a slab-column joint, shall project below the slab soffit and extend horizontally from the face of the column a distance at least equal to the thickness of the projection below the slab soffit.

A. Drop panel
B. Post-tensioning tendon
C. Corner restraint
D. Shear cap

A
  1. D 8.2.5
44
Q
  1. A , is a region of a diaphragm that transfers forces between the diaphragm and a vertical element of the lateral-force-resisting system and can extend transversely into the diaphragm to reduce nominal stresses and reinforcement congestion.

A. Tie
B. Collector
C. Dowel
D. Grouted joint

A
  1. B R12.5.4
45
Q
  1. For the connection of precast members, transfer of forces by means of ________ , shear keys, bearing, anchors, mechanical connectors, steel reinforcement, reinforced topping, or a combination of these, shall be permitted.

A. Grouted joints
B. Dowels
C. Collectors
D. Ties

A
  1. A 16.2.1.1
46
Q
  1. For slabs without beams, bent bars shall be permitted only where the depth to span ratio permits use of bends of degrees or less.

A. 25
B. 30
C. 45
D. 50

A
  1. C 8.7.4.1.3 (c)
47
Q
  1. In most slab systems, the live-to-dead load ratio will be less than and it will not be necessary to check effects of pattern loading.

A. 1
B. 2
C. 2.5
D. 3

A
  1. B R8.10.2.6
48
Q
  1. The effective prestress after losses shall provide an average compressive stress of at least on gross concrete area.

A. 25 psi
B. 50 psi
C. 75 psi
D. 100 psi

A
  1. D 24.4.4.1
49
Q
  1. Tensile stresses due to restraint from creep, , or temperature effects are to be considered to avoid uncontrolled cracks or structural failure.

A. shrinkage
B. compression
C. support
D. ductility

A
  1. A R14.1.3
50
Q
  1. failures are caused by the load transfer between the bolt and the concrete.

A. Overloading
B. Splitting
C. Corrosion
D. Shrinkage

A
  1. B R17.7.5
51
Q
  1. Each shall consist of steel shapes fabricated with a full penetration weld into identical arms at right angles.

A. stirrup
B. crosstie
C. shearhead
D. strut

A
  1. C 22.6.9.1
52
Q
  1. may be used to check for transfer of lateral forces to the supporting pedestal or footing.

A. Compression
B. Bearing-friction
C. Anchorage failure
D. Shear-friction

A
  1. D R16.3.3.5

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