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CSLB Trade > Excavation Questions > Flashcards

Excavation Questions Flashcards

1
Q

Which soil according to the code, has an allowable foundation pressure of 4000 pounds/sq. ft?

A

Massive Crystalline Bedrock

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2
Q

Which soil according tho the code, has an allowable foundation pressure of 1000 pounds/sq. ft?

A

Clay, Sandy clay, Silty Clay

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3
Q

which soil according to the code, has an allowable foundation pressure of 2000 pounds/sq. ft?

A

Sedimentary and foliated rock or gravel

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4
Q

which soil according to the code has an allowable foundation pressure of 1500 pounds/sq. ft?

A

Sand, silty sand and clayey gravel

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5
Q

the slope of cut surfaces shall be no steeper than is sae for the intended use and shall be no steeper than _____, unless the owner furnishes a soil engineering report or an engineering geology report

A

2 horizontal to 1 vertical

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6
Q

all fills shall be compacted to a minimum of _____ percent of the maximum density

A

90%

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7
Q

Swales or ditches on terraces shall have a minimum gradient of ____ percent and must be paved with reinforced concrete not less than 3” Thick.

A

5

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8
Q

Swales or ditches shall have a minimum depth at the deepest point of ____ and a minimum paved width of ____.

A

1 foot - 5 feet

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9
Q

Which of the following is the most useful method of soil sampling in granular or dense soils?

A

Split spoon sampling

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10
Q

Acidity is expressed in the terms of pH. (Percentage of free hydrogen ions). What is the most neutral ph reading for soil?

A

7.0

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11
Q

Excavating is estimated by the:

A

Cubic Yard

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12
Q

Outside electrical UF underground cables must be buried to a depth of:

A

24 inches

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13
Q

In accordance with the code expansion index, a very low expansive soil is:

A

0-20

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14
Q

In accordance with the code expansion index, a very high expansion soil is:

A

above 130

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15
Q

If excavation a trench 25 meters x 14 meters x 5 feet, how many cubic yards would there be? (3.28 ft in one meter)

A

698

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16
Q

the upstream of a dam where it makes contact with the ground is called a:

A

Heel

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17
Q

A perfectly elastic body, after the application and removal of a load that return to its original shape and size, is known as:

A

elastic action

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18
Q

The most important requirements in setting forms is:

A

The right shape and location

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19
Q

Which material requires the use of a form sealer?

A

Wood

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20
Q

Which utility lines do not require a finely graded trench?

A

Gas line and water line

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21
Q

A beam that is supported at the ends and rests on one or more intermediate supports is:

A

a continous beam

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22
Q

How many feet over public walkways must service conductors be placed

A

10ft

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23
Q

What do you follow if a soil repoart is attached to plans

A

Architectural drawings and soil report

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24
Q

When excavating a car park 500x60 and a 9” layer is taken off the top, ____ cubic yards are being removed.

A

833

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25
Q

Referring to taking 9” layer off 500x60, the best type of equipment to use is a:

A

Rubber tired Loader

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26
Q

A concrete wall poured inside of a dirt compacted dam to help avoid percolation is a:

A

Key

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27
Q

When you are using a transit or carpenter’s level, the basic starting point used is called a:

A

Bench Mark

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28
Q

If a backhoe digs an 8 ft deep trench 2 ft wide, what are some of the proper safety measures:

A

-Put up a barricade
-install shoring
-install a ladder every 25 ft extending 3ft above grade

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29
Q

rock that is dislodged by wedges and sledge hammers is:

A

common rock

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30
Q

a beam that simply rests on two supports, one at each end is called a

A

simple beam

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31
Q

when filling or backfilling a large void, the largest rock size that is allowable is

A

12”

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32
Q

the horizontal member is an open trench used to hold back soil pressure is:

A

shoring

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33
Q

a swale is

A

an invert on the ground

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34
Q

rock that is easily dislodged by bars and wedges is called

A

soft rock

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35
Q

how many feet below grade is shoring necessary when digging a ditch

A

5’

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36
Q

when removing shoring, the proper backfill would be:

A

1” gravel

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37
Q

after pilings are removed, the proper procedure would be to backfill with ___.

A

Sand

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38
Q

What is the rise of a 6% grade in 125 feet

A

7.5

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39
Q

a member that is subjected to loads acting at right angle to its axis or inclinded to the axis, for some distance from a support is called a:

A

Beam

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40
Q

a compression member whose unsupported length is ten or more times its least width is called a:

A

column

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41
Q

if bed rock can be broken with a tool such as a sledge hammer, the rock is:

A

common

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42
Q

the vertical member in an open trench used to hold back soil pressure is called:

A

Piling

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43
Q

a ditch or channel with a designated bottom width of 11 feet or more requires excavation classified as:

A

roadway excavation

44
Q

to what temperature should asphalt be heated before it is installed

A

300-375 degrees

45
Q

the layer or layers sppecified of selected material with designated thickness placed on a subbase to support a base course is called

A

subbase

46
Q

when grading, what type of tool is used

A

transit

47
Q

a beam that rests on two supports but extends or overhangs beyond one or both supports is called

A

a cantilever beam

48
Q

the minimum depth of a utility line buried in the ground is:

A

12”

49
Q

if you are excavating a trench 25 meters x 14 meters x 5 feet, how many cubic yards would it be

A

698

50
Q

some materials, under tension, can be drawn out to a considerable elongation without fracture. these materials are considered:

A

ductile

51
Q

what type of tool is used on a preliminary grade

A

hand level

52
Q

the greates stress which the material is capable of withstanding without a permanent deformation is:

A

elastic limit

53
Q

Excavtion is measured in?

A

Cubic Yards

54
Q

On a large paving job, what type of equipment is used

A

Slip form grader

55
Q

how much excavation is figured for a peir footing with the following dimensions: 3.0’ x 3.0’ x 1.0’? (Allow a 1.0’ Payline on all sides.)

A

25 cubic yards

56
Q

Soil compaction is measured by a?

A

Modified Proctor

57
Q

Fine aggregate consists of materials under?

A

1/4”

58
Q

Fine aggregate consists of materials under?

A

1/4”

59
Q

for waterproofing concrete or masonry, a _____ coating is used.

A

Bitruminous

60
Q

Concrete will _____ with age

A

Strengthen

61
Q

the degree of slope, ascending or descending with a uniform slope, such as a slope of a road or railroad is known as:

A

Gradient

62
Q

the most important requirement when using a transit is to:

A

Level it

63
Q

Which mortar designation is considered to be Earthquake mortar

A

M

64
Q

A disadvantage of conveying concrete on a conveyer horizontally is that it will:

A

Segregate

65
Q

when laying a sewer or water pipe on a grade, where should one start?

A

From the Bottom

66
Q

when backfilling soil on a gradient and a landslide occurs, what is least likely to be the cause

A

Overcompaction

67
Q

a thin treatment consisting of bituminous material and usually cover aggregate aplied to a surface course, is called the:

A

Seal-coat

68
Q

The scum that builds up on asphalt is called

A

Leaching

69
Q

when excavating a pool or utility next to a building, you must maintain a safe distance from the building of:

A

the depth of the trench

70
Q

the type of footing that is sunk the deepest is:

A

spread

71
Q

what must you do if you are grading and you are a little above and a little below grade?

A

Level with a transit

72
Q

what is it called if you are grading and you are within .10?

A

Light

73
Q

In grading a hub is a?

A

Peg driven into the ground from which elevations are taken

74
Q

What course in roadway building is not consideed AC Paving

A

Subgrading

75
Q

for safety, rather than wetting steel forms, they should be:

A

Oiled

76
Q

a Surveyor uses ____ as a guide

A

benchmark

77
Q

when testing for soil compaction one should ues a:

A

4x4 cylinder

78
Q

the best type of footing for a single column is:

A

spread footing

79
Q

In a single story family dwelling, how much of the foundation is below the grade?

A

12”

80
Q

which of the following is used to deposit concrete under water

A

Tremie

81
Q

which of the following is not a factor that influences soil compaction

A

the temperature of teh soil

82
Q

to excavate for a sewer line, you use a:

A

Backhoe

83
Q

the correct sequence for pouring concrete is Girders, beams, and:

A

slabs

84
Q

the proper procedure in demolition of most buildings is to start at the ____ and to demolish to the ____.

A

Top - Bottom

85
Q

the top surface of a roadbed upon which the pavement structure and shoulders are constructed is called the:

A

Subgrade

86
Q

Concrete for paving must be spread, vibrated, sceened and tamped within ____ minutes.

A

35

87
Q

the strip of level land at the top of a slope is called:

A

Berm

88
Q

with which of these 4 items would you cut asphalt to make it more flexible

A

kerosene

89
Q

what is the hypotenuse of a triangle with a base of 12’ and a height of 18’

A

21.6’

90
Q

buildings are classified by construction type or by:

A

occupancy group

91
Q

when would use of a step down footing be best

A

In Sloped areas

92
Q

areas of concrete less than ____ in thickness are called flatwork

A

5”

93
Q

Leveling and dressing ground surfaces either by hand or machine conforming to pre-specified contours or elevations in preparation for a subsequent operation is known as?

A

Grading

94
Q

What is the purpose of a string level?

A

To determine the horizontal level of a lot

95
Q

The basic starting point for use of an optical or transit is:

A

The Bench Mark

96
Q

How many portable toilets are needed for 10 men and 5 women on the work site?

A

2

97
Q

For 20 workers, how many portable restrooms are necessary?

A

1

98
Q

The largest Rock size allowable with backfilling a large void is:

A

12”

99
Q

The setback of a building from property lines is controlled by the:

A

Zoning Ordinance

100
Q

Which of the following determines the location of the building on the lot?

A

The plot plan

101
Q

The builders level can be used for:

A

Plumbing walls
Laying out straight lines
reading elevations

102
Q

it is best when sighting objects through the telescope of the builders level to:

A

Keep both eyes open

103
Q

The cross hair which is horizontal can be used for:

A

Reading elevations

104
Q

The graduations of a leveling rod are

A

1/8 inch wide and 1/8 inch apart

105
Q

if the rod reading at point A is 8’-0” and the reading at point B is 3’ 6” then:

A

Point A is 4’6” higher than point B

106
Q

The refrence point for establishing elevations on a construction site is called the:

A

Bench mark

CSLB Trade (22 decks)

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