Study Guide 2

Question 1

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.

Answer 1

D, All of the above.

Question 2

2) Masonry units should be laid dry.

True or False

Answer 2

True

Question 3

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.

Answer 3

C, The same benchmark.

Question 4

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

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

Answer 4

A, Lateral

Question 5

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”

Answer 5

B, 1/8” , 1/4”

Question 6

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”

Answer 6

B, 6 - 1/8”

Question 7

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.

Answer 7

D, Any of the above.

Question 8

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.

Answer 8

D, A or B.

Question 9

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”

Answer 9

C, 1” - 2”

Question 10

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”

Answer 10

A, 1”

Question 11

11) Concrete usually sets in _____ minutes.

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

Answer 11

D, 30 - 60

Question 12

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.

Answer 12

C, Welded.

Question 13

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

True or False

Answer 13

True

Question 14

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

Answer 14

B, Not necessarily increase its strength.

Question 15

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.

Answer 15

D, Creep.

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

Question 16

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.

Answer 16

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

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

Question 17

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.

Answer 17

D, Longitudinal.

Question 18

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.

Answer 18

A, longitudinal.

Question 19

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

Answer 19

True

Question 20

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. 

Answer 20

D, Longitudinal.

Question 21

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

Answer 21

B, Confines.

Note: It increases the bearing strength.

Question 22

22) Post tension in anchors are normally laterally reinforced.

True or False

Answer 22

True

Question 23

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.

Answer 23

C, Pull Apart.

Question 24

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.

Answer 24

C, Yield Point.

Question 25

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%

Answer 25

A, Less the 1% Note: It’s what permits bending.

Question 26

26) High carbon steel has greater strength but is: A, Softer B, Heavier C, Brittle. D, Tensile Strength.

Answer 26

C, Brittle.

Question 27

27) Very low carbon steel has very little strength but is: A, Flexible. B, Lighter. C, More Resistant. D, More Durable.

Answer 27

A, Flexible.

Question 28

28) Reinforcing steel is a compromise between: A, Compression and Stress. B, Strength and Flexibility. C, Cost and Weight. D, A & B

Answer 28

B, Strength and Flexibility.

Question 29

29) _____________ is a measurement of the resistance to pulling force. A, Tensile Strength. B, Axial Strength. C, Creep. D, Yield Point.

Answer 29

A, Tensile Strength.

Question 30

30) ________ Limits the useful tensile strength. A, Yield Point. B, Tensile Strength. C, Elasticity. D, Any of the above.

Answer 30

A, Yield Point.

Question 31

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. 

Answer 31

B, Bending Stress.

Question 32

32) Concrete design is based upon ______ strength test. A, Tensile. B, Compression. C, Shear. D, Yield.

Answer 32

B, Compression.

Question 33

33) Reinforcing and steel is manufactured for maximum tensile strength with: A, Compression Limits. B, Shear Limits. C, Reservation for Bending. D, No Limits. 

Answer 33

C, Reservation for Bending

Question 34

34) Reinforced concrete takes it advantage of the ______ strength of concrete. A, Yield. B, Shear. C, Compressive. D, Tensile.

Answer 34

C, Compressive.

Question 35

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

Answer 35

True

Question 36

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

Answer 36

D, 40 - 90

Question 37

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

Answer 37

A, 6” in diameter and 12” high.

Question 38

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

Answer 38

B, 2000 to 3000

Question 39

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.

Answer 39

C, Along a 45° angle.

Question 40

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

Answer 40

True

Question 41

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.

Answer 41

C, Bottom without Hooks.

Question 42

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

Answer 42

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

Question 43

43) The most common type of retaining walls are: A, Gravity Type. B, Cantilever. C, Suspended & Shear.  D. A & B

Answer 43

D. A & B

Question 44

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.

Answer 44

A, Gravity Wall.

Question 45

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

Answer 45

True

Question 46

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

Answer 46

True

Question 47

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

Answer 47

C, Bottom of the wall.

Question 48

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.

Answer 48

C, A “key” is used.

Question 49

49) Gravity type retaining walls require ______ of steel for temperature variations. A, A Minimum. B, A Maximum. C, Many Varieties. D, A & C.

Answer 49

A, A Minimum.

Question 50

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.

Answer 50

C, Inside Face.

Question 51

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

Answer 51

True

Question 52

52) The horizontal steel in a wall is: ``` A, Grade Steel. B, Temperature Steel. C, Tensile Steel. D, Compression Steel.  ```

Answer 52

B, Temperature Steel.

Question 53

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.

Answer 53

C, Unsupported Length.

Question 54

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.

Answer 54

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”.

Question 55

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

Answer 55

D B & C

Question 56

56) The use of spiral steel instead of round ties gives the column approximately ______ greater strength. A, 25% B, 30% C, 40% D, 50%

Answer 56

A, 25%

Question 57

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.

Answer 57

B, Lateral.

Question 58

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

Answer 58

C, 3

Question 59

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

Answer 59

True

Question 60

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

Answer 60

D*, 16 Note: 10” on a #2 tie on a #5 vertical.

Question 61

61) Standard clearance for a column steel is _____ inches. A, 1” B, 1 - 1/2” C, 1 - 3/4” D, 2”

Answer 61

B, 1 - 1/2”

Question 62

62)  columns must carry _____ loads and _____ loads. A, Vertical, Lateral. B, Wind, Compression. C, Shear, Stresses. D, A & B 

Answer 62

A, Vertical, Lateral.

Question 63

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

Answer 63

True

Question 64

64) Ties or spiral steel resist the _____ of a column. A, Bending. B, Yield Point. C, Compression. D, Buckling.

Answer 64

D, Buckling.

Question 65

65) A lap of ______ bar diameters is usually ample for columns. A, 20 B, 27 C, 30 D, 40

Answer 65

D, 40

Question 66

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.

Answer 66

C, No definite yield point.

Question 67

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

Answer 67

True

Question 68

68) The “W” stands for smooth wire. True or False

Answer 68

True

Question 69

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

Answer 69

False Note: D - Deformed

Question 70

70) The style of welded wire fabric designates wire spacing in inches and wire size by ____________. A, Strength. B, Length. C. Number. D. Diameter.

Answer 70

C. Number.

Question 71

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

Answer 71

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

Question 72

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

Answer 72

True

Question 73

73) Fabric widths are measured from center to center of the ______ wires. A, Transversal. B, Longitudinal. C, Outside Longitudinal. D, Outside Transversal.

Answer 73

C, Outside Longitudinal.

Question 74

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

Answer 74

True

Question 75

75) Welded wire is used extensively to reinforce slab -on- grade for _______ buildings. A, Residential. B, Commercial. C, Industrial. D. All of the above.

Answer 75

D. All of the above.

Question 76

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. 

Answer 76

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

Question 77

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. 

Answer 77

B, Transverse wire one space.

Question 78

78*) Labs are tied at intervals of _______ feet. A, 1 to 2 B, 2 to 3 C, 3 to 4 D, 4 to 6

Answer 78

* C, 3 to 4 Note: With 16 - 1/2 gage tie wire.

Question 79

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

Answer 79

True

Question 80

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. 

Answer 80

A, Staggered.

Question 81

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. 

Answer 81

C, Equal.

Question 82

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.

Answer 82

B, Compression.

Question 83

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.

Answer 83

A, Bond.

Question 84

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

Answer 84

* False Note: Little value.

Question 85

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

Answer 85

B, 2

Question 86

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

Answer 86

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

Question 87

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

Answer 87

A, Prestressed.

Question 88

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

Answer 88

True

Question 89

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

Answer 89

True

Question 90

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.

Answer 90

D, Tar.

Question 91

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.

Answer 91

D, High-Carbon.

Question 92

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

Answer 92

True

Question 93

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

Answer 93

True

Question 94

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

Answer 94

True

Question 95

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.

Answer 95

A, Prestressing.

Question 96

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.

Answer 96

C, Post-Tensioning.

Question 97

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

Answer 97

True