Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CEX YESA > Reviewer 6 > Flashcards

Reviewer 6 Flashcards

1
Q

What materials have adhesive and cohesive properties necessary to bond inert aggregates into a solid mass o adequate strength and durability

Admixtures
Adhering Materials
Inorganic Materials
Cementitious Materials
None of the Above
A

Cementitious Materials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is generated when compounds in cement react with water to acquire stable low energy states?

A

Heat of Hydration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What compound reduce the interparticle forces that exist between cement grains in the fresh paste; thereby increasing the paste fluidity

A

Plasticizers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In mixes exposed to water, what is the term used to refer to the separation of aggregate from the bitumen due to the faster absorption of water on the aggregate surface?

A

Slippage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

A parameter used for estimating strength of concrete

A

Water cement ratio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

It is the property of fresh concrete which is the ability to flow under momentum transfer or under mechanical stress

A

Mobility

Placeability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

True or False. As water to cement ratio increases, there is progressive weakening due to increase in porosity.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

It is a temporary dam-like structure constructed around an excavation to exclude water

A

Cofferdam

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which of the following is not a property of hardened hydraulic cement concrete

A

Workability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which of the following properties of aggregates has the least influence tp the quality of concrete?

A

Color, texture, and shape of its aggregates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which of the following will minimize the cracking of pavement due to thermal expansion?

Compaction of subgrade
Provide Expansion Joints and sectional pouring of concrete
Consistency of concrete mixed

A

Provide expansion joints and sectional pouring of concrete

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the mode of failure for short columns at which the concrete reaches its limits strain Eu at precisely the same instant that the tensile steel on the far side of the column reaches yield strain Ey

A

Balanced Condition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Given:
Es = 29, 000 ksi
Econcrete = 6, 000 ksi

What is the modular ratio?

A

4.83

just divide Es / Econcrete

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the max Vs (shear carried by the stirrups)

A

2/3 sqrt( f’c)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the distance from the extreme fiver in compression to the centroid of the tension steel area

A

Effective Depth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The maximum usable strain at the extreme concrete compression fiver shall be assumed to be equal to ___

A

0.003

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

A burried plate, wall, or block attached at some distance from and forming an anchorage for retaining wall

A

anchor plate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

It is a beam especially provided over an opening for a door, window, etch. to carry the wall over the opening

A

Lintel beam

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What will happen to the concrete strength if the water to cement ratio decreases?

A

Concrete strength increases, porosity decreases, solid-to-space ratio increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is the property of concrete by which it continuous to deform with time under sustained loads at unit stresses within acceptable elastic range?

A

Creep

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Honeycomb structures exhibit

A

small arches with chain particles
has a void ratio of 0.91 for a simple cubic packing
has a void ratio of 0.35 for pyramidal packing
Negative relative densities

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is the condition where the tension steel strain reaches the yielding strain simultaneously with the concrete reaching the crushing strain which is usually 0.003?

A

Balanced strain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is a material that has adhesive and cohesive properties enabling it to bound mineral fragments into a solid mass in the presence of water?

A

Hydraulic cement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

The ability of the soil to allow water to flow through it

A

Permeability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What is temporary force exerted by a device that introduce tension into a stressing tendons?

A

Lacking force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

The distance between two structural supports is called?

A

Span length

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

The force adhesion per unit area of contact between two bonded surfaces is

A

Bond stress

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

A type of concrete floor which has no supporting beams

A

One way slab

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

A type of column that is not aligned to a lower floor column

A

Floating column

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

The degree to which a location is subjected to earthquake

A

Seismicity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Ties are used for what type of structural elements

A

Columns

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

HOneycomb concrete can be limited by the …

A

Use of concrete (cement?)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

What is the purpose of the stirrups used from resisting vertical and diagonal tensions in a beam?

A

Hold bars in place

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Structural member that is subjected to transverse load

A

Beam

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Reinforcing vars put in contact to act as a ___ is called

A

Bundled bars

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What usually happen to reinforcing steel bars in reinforced concrete of a beam if its members is about to collapse

A

Yield

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Usual failure of a long column

A

Buckling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Allowable deflection for any structural member loaded with deadload and live load only

A

L/240

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Spacing for lateral support of a beam shall not exceed ___ times the least width of compression flange of face

A

50

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

It is an isolated column of masonry of a bearing wall not bonded at the sides into associated masonry, when its horizontal dimension measured the right angles or the thickness does not exceed four times its thickness

A

pier

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

Method of pre stressing in which tendons are tensioned after concrete has hardened

A

post tensioning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

A material, other than aggregate, cementitious material or water, added in small quantities to the mix in order to produce some (desired) modifications, wither to the properties of the mix or of the hardened product

A

admixture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

SImply supported beam, L meters long, carrying a uniformly distributed load with N/m produces a shear force of ___

A

wL/2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

Structures that are subjected to transverse loads are called ___

A

beams

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

These are referred to permanent loads or unmovable loads

A

Dead load

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

Loads that change position within the span of a beam in short amount of time. These loads are often exemplified by wheel loads

A

Moving loads

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

It is synonym to bending stress

A

Flexural stress

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

The minimum reinforcing steel for spiral columns allowed by the ACI code is

A

6-16mm diameter bars

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

The aCI codes states that bars larger that #11 should not be bundled in beams or girders. This means that one should not bunle the steel bars if the diameter is larger than:

A

36mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

The steel ratio, p for spiral columns ranges from ___

A

0.01 - 0.08

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

The temperature bars are 10 mm diameter steel bars placed on top and perpendicular to the main reinforcement of

A

One way slabs

52
Q

Which is the correct factored load for strength Design Method

A

1.4 DL + 1.7 LL

53
Q

It is defined as the unit strength of a material

A

Stress

54
Q

The stress developed when the applied load causes adjacent sections within a body to slide past each other

A

Shearing stress

55
Q

It is the contact pressure developed between two bodies

A

Bearing stress

56
Q

The stress induced as a result of restrained deformations due to changes in temperature

A

thermal stress

57
Q

The actual stress in a material under a given loading

A

Working stress

58
Q

It is the maximum safe stress that a material can withstand

A

Allowable stress

59
Q

A mixture of water, cement, sand, gravel or other aggregates

A

Concrete

60
Q

The nominal maximum sizes of course aggregates should be greater than ___ the narrow dimension between sides of forms, ___ the depth of slabs or the ___ minimum clear spacing between individual reinforcing bars

A

> 0.85
the narrow dimension between sides of forms,

1/3
the depth of slabs

3/4
minimum clear spacing between individual reinforcing bars

61
Q

The shortest length in meters of a commercially available rebar

A

6m

62
Q

Aggregates that passes through a No. 4 sieve ( about 6mm in size )

A

fine aggregates

63
Q

The nominal diameter of a #8 rebar in mm

A

25mm

64
Q

It is the 28th day compressive strength of concrete

A

Fc’

65
Q

The maximum number of rebar in a bundled bar

A

4

66
Q

The longest length in meters of a commercially available rebar

A

12

67
Q

The load factor for a dead load

A

1.2

68
Q

The load factor for a live load

A

1.6

69
Q

The load factor for wind load

A

0.8

70
Q

A composite member consisting of a concrete and reinforcing bars

A

reinforced concrete

71
Q

The strength reduction factor for flexure is___

A

0.9

72
Q 
The nominal diameter factor of 
#3 rebar in mm
A

10

73
Q

It is the yield strength of steel rebar

A

Fy

74
Q

The maximum usable strain for concrete is

A

0.003

75
Q

Aggregates that are retained through a No. 4 sieve (about 6mm in size)

A

coarse aggregates

76
Q

Code limits the tensile steel percentage to ensure what kind of failure?

A

Brittle

77
Q

What is the standard weight in kilograms of one bag Portland cement?

A

40kgs

78
Q

The value of Beta1if the fc’ is less than 30MPa

A

0.85

79
Q

The maximum reinforcement ratio provided by the code is taken __ / fy

A

1.4

80
Q

True or False. Water coming from clear canals can be mixed concrete

A

F

81
Q

True or False. Reinforcing steel is strong in tension

A

T

82
Q

The higher the water cement ratio, the lower the strength of the concrete

A

T

83
Q

Deformed rebar is better than plain rebar

A

T

84
Q

Tables and chairs inside a classroom is considered Dead load

A

F

85
Q

Elongated gravel is much better than rounded gravel

A

F

86
Q

Under reinforced design is more preferred by designers other than the over reinforced design

A

T

87
Q

A slump of zero mean high workability

A

F

88
Q

Concrete is strong in compression

A

T

89
Q

Live load for classrooms are larger than that of the libraries

A

F

90
Q

The maximum moment of a simply supported beam whose span is L in meter carrying a uniformly distributed load of w in N/m is ___

A

wL2/8

91
Q

Loads that are movable or replaceable on structure are known as

A

Live load

92
Q

It is one in which the lateral stiffness is less than 70% of the stiffness of the story above it

A

Soft story

93
Q

Horizontal or nearly horizontal system acting to transmit lateral forces of the vertical resisting elements. It includes bracing systems

A

Diaphragm

94
Q

These are inert material used in concrete which occupy more than 75% of the volume of the hardened concrete product

A

Aggregates

95
Q

Steel elements such as wire, cables, bars, rods or strands of wires or a bundle of such elements used in pre-stressed concrete structures are called ___

A

Tendons

96
Q

What method of pre-stressing in which tendons are tensioned before concrete is cast in place

A

Pre tensioning

97
Q

This refers to the substance other than aggregate, cement or water added in small quantity normally less than 5% of the weight cement, to alter the properties of the concrete mix or the hardened solid

A

Admixture

98
Q

The minimum bend diameter for 10mm dia through 25mm dia bars

A

6db

99
Q

Bars larger than ___mm shall not ve bundled in beams

A

36mm

100
Q

Minimum concrete cover cast against and permanently exposed to earth

A

75mm

101
Q

In ultimate strength design, the strength reduction factor dia for shear and torsion

A

0.85

102
Q

The minimum one way slab thickness for a both ends continuous slab is

A

L/28

103
Q

Deep simple span flexural members has overall depth to clear span ration greater than

A

0.6

104
Q

Before commencing the excavation work, the person making the excavation shall notify in writing the owner of the adjoining building not less than __days before such excavation is to be made

A

10days

105
Q

The maximum spacing of ties and spirals driven in a driven precast concrete pile center to center

A

150mm

106
Q

Aviation control towers fall to what type of occupancy

A

Essential Facilities

107
Q

The allowable deflection for any structural member loaded with live load only

A

L/360

108
Q

A wall that resists horizontal forces applied in the plane of the wall

A

Shear wall

109
Q

Adherence between materials such as bricks/mortar, or piles of felt, of between felts and other elements of roof systems which use bitumen or other materials as the cementing agent

A

Bond

110
Q

If the ratio of the short direction to the long direction of a slb is less htan 0.5 then the slab is considered __

A

one way slab

111
Q

In ultimate strength design, the reduction factor diameter for bending is __

A

0.9

112
Q

The actual strain by which a concrete is 0.004. For safety purposes the ACI code allows designers to use

A

0.003

113
Q

The minimum clear cover allowed by the code for slabs, not exposed to weather is

A

20mm

114
Q

8 steel reinforcing bar diameter in mm

A

25mm

115
Q

What do you call structures that are necessary for emergency operations subsequent to a natural disaster

A

essential facilities

116
Q

It is one in which the lateral stiffness is less than 70% of the stiffness of the story above or less than 80% of the average stiffness of the three stories above

A

soft story

117
Q

The structural system without a complete vertical load carrying space frame

A

bearing wall system

118
Q

Large beam supporting a smaller beam

A

Girder beam

119
Q

Advantage of steel over concrete

A

Elasticity

120
Q

Material added to modify cement properties

A

Admixture

121
Q

Artificial stone derived from mixture of properly proportioned amount of hydraulic cement, fine aggregates, coarse aggregates and water with or without admixtures

A

concrete

122
Q

Secondary effect on shears, axial forces and moments of frame members dues to the action of the verical induced by horizontal displacement of the structure resulting from various loading

A

Aftershock

123
Q

It is one in which the story strength is less than 80% of the story above

A

Weak story

124
Q

Wall design to resist the lateral displacement of soil or other materials

A

Retaining wall

125
Q

Occupancies and structures housing or supporting toxix or explosive chemicals or substances. Non building structures storing, supporting or containing quantities of toxic or explosive substances

A

Hazarduous facilities

126
Q

It is an assemblage of framing members designed to support gravity loads and resist lateral forces

A

Structure

127
Q

Minimum clear cover for beams, not exposed to weather i __

A

40mm

CEX YESA (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions