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Trade Study Guide > Study Guide 2 > Flashcards

Study Guide 2 Flashcards

1
Q

1) The general steps for building a concrete slab on compacted soil and bonding the masonry units with mortar are:

A, Lay out the work and drive stakes and place the line.
B, Excavate soil, pour concrete slab into an accurately excavated trench.
C, Spread a mortar cushion; as the work progresses, lay the units with mortar joints, clean and protect the work.
D, All of the above.

A

D, All of the above.

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2
Q

2) Masonry units should be laid dry.

True or False

A

True

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3
Q

3) The principal dimensions of the soil base: length, width, slope and depth, are measured from:

A, The curb level.
B, The floor level of the existing house.
C, The same benchmark.
D, the same station.

A

C, The same benchmark.

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4
Q

4) The length of width dimensions are the ____________ dimensions.

A, Lateral
B, transversal
C, Base Line
D, Common

A

A, Lateral

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5
Q

5) To provide service drainage, the patio surface slopes as specified, usually from ____ to _____ per 12 inches.

A, 1/16” , 1/8”
B, 1/8” , 1/4”
C, 1/4” , 1/2”
D, 1/4” , 1/2”

A

B, 1/8” , 1/4”

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6
Q

6) According to the reference “the bricklayer” a patio with the following elements of construction should be excavated to what depth for a top surface finish grade. The gravel subbase is 1” the concrete base is 3”, the mortar is 1/2”, setting bed 1/8” and then Masonry units 1-1/2”.

A, 6”
B, 6 - 1/8”
C, 8 - 1/8”
D, 10 - 1/4”

A

B, 6 - 1/8”

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7
Q

7) As soil is being removed, use a _____ to measure the proper dimensions as soil is being removed?

A, Builders level.
B, Rule.
C, Lines.
D, Any of the above.

A

D, Any of the above.

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8
Q

8) When tamping soil, use a hand tamper, road construction equipment, and:

A, A roller.
B, Pneumatic equipment.
C, A jitterbug.
D, A or B.

A

D, A or B.

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9
Q

9) Pea gravel, chat, or small stone may be specified as the sub base which is placed between the soil and the concrete slab, the depth of the fill is _____ .

A, 3” - 4”
B, 2” - 3”
C, 1” - 2”
D, 1/2” - 1”

A

C, 1” - 2”

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10
Q

10) The specified reinforcing wire or bars are placed usually _____ inches above the membrane in a reinforcing grid.

A, 1”
B, 2”
C, 2 - 1/2”
D, 3”

A

A, 1”

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11
Q

11) Concrete usually sets in _____ minutes.

A, 30
B, 15 - 30
C, 30 - 45
D, 30 - 60

A

D, 30 - 60

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12
Q

12)  Direct bearing can be developed through lugs, plates, or reinforcing bars _____ to the structural shape or tubing before the concrete is cast.

A, Spiraled.
B, Molded.
C, Welded.
D, Tied.

A

C, Welded.

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13
Q

13) Flexul compressive strength need not be considered a part of direct compression load to be developed by bearing.

True or False

A

True

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14
Q

14) Simply wrapping concrete around a structural steel shape may stiffen the shape, but it will ______ .

A, Increase its strength
B, Not necessarily increase its strength.
C, Weekend the shear value. 
A, A & B

A

B, Not necessarily increase its strength.

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15
Q

15) in reinforced concrete column subjected to sustained loads, ___creep__ transfers some of the load from the concrete to the steel, thus increasing the steel stresses.

A, Strain.
B, Shear.
C, Compression.
D, Creep.

A

D, Creep.

Note: I have never heard of “creep” in the construction industry.

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16
Q

16) For heavily reinforced columns or for composite columns in which the pipe or structural shape makes up a large percentage of the cross-section:

A, The load transfer due to the creep is not sufficient.
B,  The load transfer due to the creep is sufficient.
C, The load transfer due to the creep is suspect for minor cracking.
D, none of the above.

A

A, The load transfer due to the creep is not sufficient.

Note: I have never heard of creep in the construction industry.

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17
Q

17) Steel encased concrete sections should have a metal wall thickness large enough to attain ______ yield strength before buckling outward.

A, Transversal.
B, Sectional.
C, Horizontal.
D, Longitudinal.

A

D, Longitudinal.

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18
Q

18) The radial pressure provided by the spiral insurers interaction between concrete, reinforce bars, and steel core search that blank _____ bars will both stiffen and strengthen the cross-section.

A, longitudinal
B, Cross.
C, Lateral.
D, Spiral.

A

A, longitudinal.

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19
Q

19) To maintain the concrete around the structural steel core, it is responsible to require more lateral ties than needed for ordinary reinforced concrete columns.

True or False

A

True

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20
Q

20) Because of probable separation at high strains between the steel core and the concrete, ______ bars will be ineffective in stiffing cross-sections even though they would be useful in sustaining compression forces.

A, Lateral.
B, Transversal.
C, Spiral.
D, Longitudinal. 

A

D, Longitudinal.

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21
Q

21*) When the supporting area is wider than the loaded area on all sides of a concrete support, the surrounding concrete _____ the bearing area.

A, Reduces. 
B, Confines.
C, Extends.
D, A & B

A

B, Confines.

Note: It increases the bearing strength.

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22
Q

22) Post tension in anchors are normally laterally reinforced.

True or False

A

True

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23
Q

23) The “tensile strength” of a bar is the point of measure in PSIA that a bar will:

A, Bend.
B, Stretch.
C, Pull Apart.
D. Break.

A

C, Pull Apart.

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24
Q

24) At some point over a PSAA, when a bar begins to lengthen with very little pull, this is known as:

A, Creep.
B, Elasticity.
C, Yield Point.
D, Tensile Strength.

A

C, Yield Point.

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25
Q

25*) The steel product required for reinforcing has a carbon content of _____ .

A, Less the 1%
B, Less then 5%
C, More then 1%
D, More then 5%

A

A, Less the 1%

Note: It’s what permits bending.

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26
Q

26) High carbon steel has greater strength but is:

A, Softer
B, Heavier
C, Brittle.
D, Tensile Strength.

A

C, Brittle.

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27
Q

27) Very low carbon steel has very little strength but is:

A, Flexible.
B, Lighter.
C, More Resistant.
D, More Durable.

A

A, Flexible.

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28
Q

28) Reinforcing steel is a compromise between:

A, Compression and Stress.
B, Strength and Flexibility.
C, Cost and Weight.
D, A & B

A

B, Strength and Flexibility.

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29
Q

29) _____________ is a measurement of the resistance to pulling force.

A, Tensile Strength.
B, Axial Strength.
C, Creep.
D, Yield Point.

A

A, Tensile Strength.

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30
Q

30) ________ Limits the useful tensile strength.

A, Yield Point.
B, Tensile Strength.
C, Elasticity.
D, Any of the above.

A

A, Yield Point.

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31
Q

31) Most of the forces acting upon reinforced concrete can be classified under three headings. one is wrong; which is it:

A, Compressive Strength.
B, Bending Stress.
C, Tensile Stress.
D, Shear Stress. 

A

B, Bending Stress.

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32
Q

32) Concrete design is based upon ______ strength test.

A, Tensile.
B, Compression.
C, Shear.
D, Yield.

A

B, Compression.

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33
Q

33) Reinforcing and steel is manufactured for maximum tensile strength with:

A, Compression Limits.
B, Shear Limits.
C, Reservation for Bending.
D, No Limits. 

A

C, Reservation for Bending

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34
Q

34) Reinforced concrete takes it advantage of the ______ strength of concrete.

A, Yield.
B, Shear.
C, Compressive.
D, Tensile.

A

C, Compressive.

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35
Q

35) Reinforcing concrete takes advantage of the compression strength of concrete and the tensile strength of reinforcing steel.

True or False

A

True

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36
Q

36) The shearing strength the concrete ranges from ________ % of the compressive strength and may be computed from the compressive strength test.

A, 10 - 30
B, 20 - 40
C, 40 - 60
D, 40 - 90

A

D, 40 - 90

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37
Q

37) The compressive strength of concrete is measured by making a test cylinder _____ and keeping it moist for 28 days.

A, 6” in diameter and 12” high.
B, 6” to 12” high.
C, Cone - Shaped 12” high.
D, B & C

A

A, 6” in diameter and 12” high.

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38
Q

38) For most of the standard concrete mixers the test cylinders will begin to fail when the compression stress is between _______ Lbs. per sq. in. of circular area.

A, 1000 to 2000
B, 2000 to 3000
C, 100 to 300
D, 300 to 600

A

B, 2000 to 3000

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39
Q

39) The cylinders of concrete in question # 37 will crack:

A, Vertically.
B, In many places.
C, Along a 45° angle.
D, Usually at the midway point.

A

C, Along a 45° angle.

40
Q

40) A grade beam is designed as a regular beam with piling acting as columns. Steel should be spliced at the point of minimum stresses as in a regular beam.

True or False

A

True

41
Q

41) The horizontal reinforcing steel in a pad footing is more effective near the ______ .

A, Bottom.
B, Bottom with Hooks.
C, Bottom without Hooks.
D, Top.

A

C, Bottom without Hooks.

42
Q

42) The theory of the design of the retaining wall considers two forces acting upon the wall:

A, The weight of earth, downward forces and the volume of earth, horizontal forces.
B, The height of the earth and the moisture.
C, Shear and Bending.
D, A & C

A

A, The weight of earth, downward forces and the volume of earth, horizontal forces.

43
Q

43) The most common type of retaining walls are:

A, Gravity Type.
B, Cantilever.
C, Suspended & Shear. 
D. A & B

A

D. A & B

44
Q

44) The type of retaining wall used chiefly when a low wall is adequate (a curb) is:

A, Gravity Wall.
B, Cantilever.
D, Compression.
D, Plate.

A

A, Gravity Wall.

45
Q

45) The cantilever wall uses the wide footing and a narrow wall section.

True or False

A

True

46
Q

46) The wide footing resist the tendency of the earth to push the wall over.

True or False

A

True

47
Q

47) The force applied against a cantilever wall is greater near the:

A, Top of the wall.
B, Center of the wall.
C, Bottom of the wall.
D, A & B

A

C, Bottom of the wall.

48
Q

48) To prevent the wall from slipping from the footing:

A, Dowels are used.
B, More reinforcing is required.
C, A “key” is used.
D, A continuous footing and wall are poured.

A

C, A “key” is used.

49
Q

49) Gravity type retaining walls require ______ of steel for temperature variations.

A, A Minimum.
B, A Maximum.
C, Many Varieties.
D, A & C.

A

A, A Minimum.

50
Q

50) The cantilever type of retaining wall needs a large amount of vertical steel on the ______ to withstand the bending forces of the earth.

A, Bottom.
B, Top.
C, Inside Face.
D, Outside Face.

A

C, Inside Face.

51
Q

51) Because the force on a cantilever retaining wall is greater at the base, added steel is needed at the lower section of the wall.

True or False

A

True

52
Q

52) The horizontal steel in a wall is:

A, Grade Steel.
B, Temperature Steel.
C, Tensile Steel.
D, Compression Steel.

A

B, Temperature Steel.

53
Q

53) One of the most important considerations in the design of a column is the:

A, Diameter.
B, Thickness.
C, Unsupported Length.
D, The Base.

A

C, Unsupported Length.

54
Q

54*) For economy, most columns are designed to be “short columns”,meaning that the length must be: 

A, Ten times longer than the width.
B, Five times longer than the width.
C, At least four times longer than the width.
D, Less than ten times the least width.

A

D*, Less than ten times the least width.

Note: A one square foot column must be at least than 10 feet tall. If it is over it is considered a “long column”.

55
Q

55) The common ties of reinforcing steel in concrete are:

A,  Linear and spiral.
B,  Vertical bars with spiral steel.
C, Vertical bars with ties.
D B & C

A

D B & C

56
Q

56) The use of spiral steel instead of round ties gives the column approximately ______ greater strength.

A, 25%
B, 30%
C, 40%
D, 50%

A

A, 25%

57
Q

57) The tie or spiral is used in the column to prevent the vertical steel from _____ movement.

A, Horizontal.
B, Lateral.
C, Downward.
D, Upward.

A

B, Lateral.

58
Q

58) Most building codes require that each vertical bar in a tied column be held firmly on ______ sides.

A, 1
B, 2,
C, 3
D, 4

A

C, 3

59
Q

59) A column having more then four verticals must use cross ties.

True or False 

A

True

60
Q

60*) The spacing of a tide column is usually limited to a minimum of _____ times the diameter of the vertical bar or 48 times the diameter of the tie.

A, 10
B, 12
C, 14
D, 16

A

D*, 16

Note: 10” on a #2 tie on a #5 vertical.

61
Q

61) Standard clearance for a column steel is _____ inches.

A, 1”
B, 1 - 1/2”
C, 1 - 3/4”
D, 2”

A

B, 1 - 1/2”

62
Q

62)  columns must carry _____ loads and _____ loads.

A, Vertical, Lateral.
B, Wind, Compression.
C, Shear, Stresses.
D, A & B 

A

A, Vertical, Lateral.

63
Q

63) The unsupported length of the column is very important to the design of the column.

True or False

A

True

64
Q

64) Ties or spiral steel resist the _____ of a column.

A, Bending.
B, Yield Point.
C, Compression.
D, Buckling.

A

D, Buckling.

65
Q

65) A lap of ______ bar diameters is usually ample for columns.

A, 20
B, 27
C, 30
D, 40

A

D, 40

66
Q

66) Call-drawn wire has ______, possibly allowing a reduction in steel with the use of welded wire fabric.

A, No Limit.
B, Less Straight.
C, No definite yield point.
D, A definite yield point.

A

C, No definite yield point.

67
Q

67) Mesh 06 gauge or higher gauge is difficult to support with chairs or blocks and is usually pulled up into position.

True or False

A

True

68
Q

68) The “W” stands for smooth wire.

True or False

A

True

69
Q

69*)  The “D” stands for diameter of wire.

True or False

A

False

Note: D - Deformed

70
Q

70) The style of welded wire fabric designates wire spacing in inches and wire size by ____________.

A, Strength.
B, Length.
C. Number.
D. Diameter.

A

C. Number.

71
Q

For this one use the paper form at this time!!!!!!!!

71) A typical style would be written 6 x 4 W5.5 x W 8 and would indicate:

(

A, 6
B, 4
C, 5
D, 8

A

(1) A
(2) B
(3) C
(4) C

72
Q

72)  The terms Longitudinal and transfer have no reference to the orientation of the wires in the concrete structure.

True or False

A

True

73
Q

73) Fabric widths are measured from center to center of the ______ wires.

A, Transversal.
B, Longitudinal.
C, Outside Longitudinal.
D, Outside Transversal.

A

C, Outside Longitudinal.

74
Q

74) Fabric lengths, for both sheets and rolls, are measured from tip to tip of the longitudinal wires.

True or False

A

True

75
Q

75) Welded wire is used extensively to reinforce slab -on- grade for _______ buildings.

A, Residential.
B, Commercial.
C, Industrial.
D. All of the above.

A

D. All of the above.

76
Q

76) Reinforcement is used to ensure:

A, That cracks will not develop.
B, That the concrete will not separate.
C, That the cracks that do develop will be small and held together.
D, Stronger compression concrete. 

A

C, That the cracks that do develop will be small and held together.

77
Q

77) The usual practice is to lap the edge longitudinal wire and the end ________ .

A, Transverse wire.
B, Transverse wire one space.
C, Longitudinal wire.
D, Longitudinal wire one space. 

A

B, Transverse wire one space.

78
Q

78*) Labs are tied at intervals of _______ feet.

A, 1 to 2
B, 2 to 3
C, 3 to 4
D, 4 to 6

A
  • C, 3 to 4

Note: With 16 - 1/2 gage tie wire.

79
Q

79) Ties should be made alternately on the edge wire of the top and bottom fabric layers.

True or False

A

True

80
Q

80) When splicing sheets ends they should be placed so the ends in adjacent rows are:

A, Staggered.
B, Parallel.
C, Butting.
D. End to End. 

A

A, Staggered.

81
Q

81) Although the full one wire space lab is generally used a lap of only 2 inches will provide ______ strength.

A, 50%
B, 90%
C, Equal.
D, Acceptable. 

A

C, Equal.

82
Q

82)  For smooth wire fabric the strength of a lab splice depends upon the shear value of the weld and the _______ strength a concrete.

A, Tensile.
B, Compression.
C, Shear.
D, Yield.

A

B, Compression.

83
Q

83) The length of wire in the lap has no value because the ______ of concrete to the wire is not considered.

A, Bond.
B, Strength.
C, Corrosion.
D, Yield.

A

A, Bond.

84
Q

84*) Mesh on subgrade or near the bottom of the slab is of the greatest value.

True or False

A
  • False

Note: Little value.

85
Q

85)  The location of mesh in slabs from 4 to 6 inches thick is _____ inches below the surface of the concrete.

A, 1
B, 2
C, 3
D, 4

A

B, 2

86
Q

86*) It is practical to support lightweight fabric on concrete blocks.

True or False

A
  • False

Note: Left the fabric just ahead of the head of the pour.

87
Q

87) Stretching wires or cables between two points and pouring concrete around them and letting the concrete reach sufficient strength is called:

A, Prestressed.
B, Post-Tensioning. 
C, Post-Stressing.
D, A or C

A

A, Prestressed.

88
Q

88) And post-tensioning the wires are not stretched until the concrete has attained some strength.

True or False

A

True

89
Q

89) In stressed or tensioned concrete the stress of the cable must be retained.

True or False

A

True

90
Q

90) If the cables are not grouted, they are usually galvanized and coated with _______ to prevent rusting.

A, Plastic.
B, Plaster.
C, Paint.
D, Tar.

A

D, Tar.

91
Q

91) The most common type of cable is produced by cold drawing _______ hot rolled rods though dies.

A, Carbón.
B, Hot Carbon.
C, Cold Carbon.
D, High-Carbon.

A

D, High-Carbon.

92
Q

92) A standard type of cable consists of a strength center wire with slightly smaller wires wrapped around it.

True or False

A

True

93
Q

93) In prestressed concrete, the cable can be anchored to the following lines of maximum stress.

True or False

A

True

94
Q

94) In post-tensioning, the cables need not be anchored but can be tied in place.

True or False

A

True

95
Q

95) __________ consists of stretching cables, then forming pouring concrete, and releasing the cables slowly apply a stress to the concrete.

A, Prestressing.
B, Post-Tensioning.
C, Post-Tensioning.
D, Stretching.

A

A, Prestressing.

96
Q

96) _____________ consists of pouring the concrete around cables that are positioned but not tension, and stressing the cables after the concrete has gain strength.

A, Stretching.
B, Pre-Tension
C, Post-Tensioning.
D) Prestressing.

A

C, Post-Tensioning.

97
Q

97) The cables can either bond to the concrete or be anchored to the ends to apply either stress to the concrete.

True or False

A

True

Trade Study Guide (8 decks)

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