Excavation Questions Flashcards
Which soil according to the code, has an allowable foundation pressure of 4000 pounds/sq. ft?
Massive Crystalline Bedrock
Which soil according tho the code, has an allowable foundation pressure of 1000 pounds/sq. ft?
Clay, Sandy clay, Silty Clay
which soil according to the code, has an allowable foundation pressure of 2000 pounds/sq. ft?
Sedimentary and foliated rock or gravel
which soil according to the code has an allowable foundation pressure of 1500 pounds/sq. ft?
Sand, silty sand and clayey gravel
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
2 horizontal to 1 vertical
all fills shall be compacted to a minimum of _____ percent of the maximum density
90%
Swales or ditches on terraces shall have a minimum gradient of ____ percent and must be paved with reinforced concrete not less than 3” Thick.
5
Swales or ditches shall have a minimum depth at the deepest point of ____ and a minimum paved width of ____.
1 foot - 5 feet
Which of the following is the most useful method of soil sampling in granular or dense soils?
Split spoon sampling
Acidity is expressed in the terms of pH. (Percentage of free hydrogen ions). What is the most neutral ph reading for soil?
7.0
Excavating is estimated by the:
Cubic Yard
Outside electrical UF underground cables must be buried to a depth of:
24 inches
In accordance with the code expansion index, a very low expansive soil is:
0-20
In accordance with the code expansion index, a very high expansion soil is:
above 130
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)
698
the upstream of a dam where it makes contact with the ground is called a:
Heel
A perfectly elastic body, after the application and removal of a load that return to its original shape and size, is known as:
elastic action
The most important requirements in setting forms is:
The right shape and location
Which material requires the use of a form sealer?
Wood
Which utility lines do not require a finely graded trench?
Gas line and water line
A beam that is supported at the ends and rests on one or more intermediate supports is:
a continous beam
How many feet over public walkways must service conductors be placed
10ft
What do you follow if a soil repoart is attached to plans
Architectural drawings and soil report
When excavating a car park 500x60 and a 9” layer is taken off the top, ____ cubic yards are being removed.
833
Referring to taking 9” layer off 500x60, the best type of equipment to use is a:
Rubber tired Loader
A concrete wall poured inside of a dirt compacted dam to help avoid percolation is a:
Key
When you are using a transit or carpenter’s level, the basic starting point used is called a:
Bench Mark
If a backhoe digs an 8 ft deep trench 2 ft wide, what are some of the proper safety measures:
-Put up a barricade
-install shoring
-install a ladder every 25 ft extending 3ft above grade
rock that is dislodged by wedges and sledge hammers is:
common rock
a beam that simply rests on two supports, one at each end is called a
simple beam
when filling or backfilling a large void, the largest rock size that is allowable is
12”
the horizontal member is an open trench used to hold back soil pressure is:
shoring
a swale is
an invert on the ground
rock that is easily dislodged by bars and wedges is called
soft rock
how many feet below grade is shoring necessary when digging a ditch
5’
when removing shoring, the proper backfill would be:
1” gravel
after pilings are removed, the proper procedure would be to backfill with ___.
Sand
What is the rise of a 6% grade in 125 feet
7.5
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:
Beam
a compression member whose unsupported length is ten or more times its least width is called a:
column
if bed rock can be broken with a tool such as a sledge hammer, the rock is:
common
the vertical member in an open trench used to hold back soil pressure is called:
Piling
a ditch or channel with a designated bottom width of 11 feet or more requires excavation classified as:
roadway excavation
to what temperature should asphalt be heated before it is installed
300-375 degrees
the layer or layers sppecified of selected material with designated thickness placed on a subbase to support a base course is called
subbase
when grading, what type of tool is used
transit
a beam that rests on two supports but extends or overhangs beyond one or both supports is called
a cantilever beam
the minimum depth of a utility line buried in the ground is:
12”
if you are excavating a trench 25 meters x 14 meters x 5 feet, how many cubic yards would it be
698
some materials, under tension, can be drawn out to a considerable elongation without fracture. these materials are considered:
ductile
what type of tool is used on a preliminary grade
hand level
the greates stress which the material is capable of withstanding without a permanent deformation is:
elastic limit
Excavtion is measured in?
Cubic Yards
On a large paving job, what type of equipment is used
Slip form grader
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.)
25 cubic yards
Soil compaction is measured by a?
Modified Proctor
Fine aggregate consists of materials under?
1/4”
Fine aggregate consists of materials under?
1/4”
for waterproofing concrete or masonry, a _____ coating is used.
Bitruminous
Concrete will _____ with age
Strengthen
the degree of slope, ascending or descending with a uniform slope, such as a slope of a road or railroad is known as:
Gradient
the most important requirement when using a transit is to:
Level it
Which mortar designation is considered to be Earthquake mortar
M
A disadvantage of conveying concrete on a conveyer horizontally is that it will:
Segregate
when laying a sewer or water pipe on a grade, where should one start?
From the Bottom
when backfilling soil on a gradient and a landslide occurs, what is least likely to be the cause
Overcompaction
a thin treatment consisting of bituminous material and usually cover aggregate aplied to a surface course, is called the:
Seal-coat
The scum that builds up on asphalt is called
Leaching
when excavating a pool or utility next to a building, you must maintain a safe distance from the building of:
the depth of the trench
the type of footing that is sunk the deepest is:
spread
what must you do if you are grading and you are a little above and a little below grade?
Level with a transit
what is it called if you are grading and you are within .10?
Light
In grading a hub is a?
Peg driven into the ground from which elevations are taken
What course in roadway building is not consideed AC Paving
Subgrading
for safety, rather than wetting steel forms, they should be:
Oiled
a Surveyor uses ____ as a guide
benchmark
when testing for soil compaction one should ues a:
4x4 cylinder
the best type of footing for a single column is:
spread footing
In a single story family dwelling, how much of the foundation is below the grade?
12”
which of the following is used to deposit concrete under water
Tremie
which of the following is not a factor that influences soil compaction
the temperature of teh soil
to excavate for a sewer line, you use a:
Backhoe
the correct sequence for pouring concrete is Girders, beams, and:
slabs
the proper procedure in demolition of most buildings is to start at the ____ and to demolish to the ____.
Top - Bottom
the top surface of a roadbed upon which the pavement structure and shoulders are constructed is called the:
Subgrade
Concrete for paving must be spread, vibrated, sceened and tamped within ____ minutes.
35
the strip of level land at the top of a slope is called:
Berm
with which of these 4 items would you cut asphalt to make it more flexible
kerosene
what is the hypotenuse of a triangle with a base of 12’ and a height of 18’
21.6’
buildings are classified by construction type or by:
occupancy group
when would use of a step down footing be best
In Sloped areas
areas of concrete less than ____ in thickness are called flatwork
5”
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?
Grading
What is the purpose of a string level?
To determine the horizontal level of a lot
The basic starting point for use of an optical or transit is:
The Bench Mark
How many portable toilets are needed for 10 men and 5 women on the work site?
2
For 20 workers, how many portable restrooms are necessary?
1
The largest Rock size allowable with backfilling a large void is:
12”
The setback of a building from property lines is controlled by the:
Zoning Ordinance
Which of the following determines the location of the building on the lot?
The plot plan
The builders level can be used for:
Plumbing walls
Laying out straight lines
reading elevations
it is best when sighting objects through the telescope of the builders level to:
Keep both eyes open
The cross hair which is horizontal can be used for:
Reading elevations
The graduations of a leveling rod are
1/8 inch wide and 1/8 inch apart
if the rod reading at point A is 8’-0” and the reading at point B is 3’ 6” then:
Point A is 4’6” higher than point B
The refrence point for establishing elevations on a construction site is called the:
Bench mark
