ONLINE CONTRACTORS TEST C12 Flashcards by Edwin Amaya

Earthwork excavation plan generally prepared with a scale of:

1 horizontal , 10 vertical

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If the excavation is exceeding 5 feet in depth and 20 sq ft. In plan area with a depth not more than 1 foot, is termed as _________

Surface Excavation

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A plot of land measures 40’x40’ with an average cut depth of 5 feet. How many cubic yards of soil will be cut ?

297 cu.yds

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What is a KEY property that is useful in identifying rocks and minerals ?

Density

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In mining and geological works, the drilling process is employed for:

Blasting
Exploration
Core Drilling

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A highway with separated roadbeds for traffic traveling in opposing directions is referred as ________

Divided Highway

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The specified minimum angle intersection for the roadways is ______ degrees.

75˚

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The maximum super elevation rate specified for freeways, expressways, multi lane conventional highway is _______

0.10

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What is the purpose of mechanical stabilization ?

Improving strength
Plasticity
Stability

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Grading is exceeds __________ cubic yards shall be performed as per the in charge engineers’ guidelines and approved grading plans.

5,000 cu.yds

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According to CalTrans Standard specifications the type of cement used for cementitious stabilizations of soils is/are :

Type II AND Type V

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The precise definition of “backfill” is __________

The material used to fill excavation

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What is the maximum permitted slope steepness for the fill ?

2:1

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If the slope height is more than 60 feet, it is recommended to construct the terraces at every _______ feet intervals .

30 feet

( terraces are required at every 30 feet intervals with base minimum width of 8 feet )

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The import material used for the basement subgrade preparation shall be scratched to a depth of _______ inches below subgrade.

6 “

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How should a contractor proceed when a concrete load has arrived on job site and the material comes out of the chute in lumps ?

Reject the load

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What is the allowable lippage between pavers ?

1/8”

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Handling unanticipated hazardous materials at the project site adds risk to who ?

The Owner

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The maximum allowable slope for excavation in general construction is ( Horizontal:Vertical) :

1:1

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The largest rock size permitted in road bed excavation fill if the finished grade is within 3 feet is _______ inches

3”

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The specified minimum and maximum width of single residential driveways should be ______ feet and ____ feet respectively .

12 ‘ and 20 ‘

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As per CalTrans earth specifications, the subgrade soil for the pavement is to be compacted to minimum of 95% laboratory density. This should be achieved to a minimum depth of ______ feet below the finished grade.

2.5 feet

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Imported backfill material shall not be more than ______ percent by weight of material passing No. 200 mesh sieve

10%

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Excavated materials is generally classified into:

Loose rock
Solid rock
Common excavation

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If authorized, controlled low-strength material may be used as structure backfill for pipe culverts unless the culvert has a diameter of more than ____ feet

20 feet

According to California Test maximum plasticity index permitted for the backfill material is ______

20%

The specified minimum R-value for the imported backfill material is ______

What does the cloud shape represent on a blueprint ?

Revisions

Is it recommended that OPTIONAL right-turn lanes should not be used in combination with right turn only lanes on roads where what type bicycle lanes is present ?

Type II

What are examples for Type B soils ?

Silt , silty loam, sandy loam, granular cohesive solids including angular gravel ( crushed rock )

What are examples for Type A soils ?

Clay, silty clay, clay loam and sandy clay

What are examples for Type C soils ?

Granular soils, sand, gravel , loamy sand, submerged oil and rock

The dimension mentioned for the earth measurements are _______ distances

Horizontal

When placing an aggregate for a highway, what piece of equipment is not required on the first day ?

Scraper

What does the “ F “ mean on the grading stake ?

Fill stake

On a highway plan, what does “RA” stand for ?

Reclaimed asphalt

What does “PG” refer to on the grading stakes ?

Pad grade

The specified minimum angle of intersection for the roadways is _____ degrees

Slurry cement backfill must be fluid workable and shall contain at least ______ pounds of cement per cubic yard

188 lbs

The minimum specified vertical clearance over the travelled way for conventional highways or parkways is ______ feet

15 feet

What is the height of the object that is used to determine the stopping sight distance in highway design ?

1/2 foot

The soils resulting from the parental soil having rock characteristics is generally referred to as ?

Residual

What is the recommended primary roller weight for the soil compaction, if the thickness of compaction is more than 12” ?

25 tons

What does a slope of 4:1 refer to ?

4 feet run for every 1 inch rise

The flexible pipe culverts, the minimum height of controlled low-strength material must be ____ times the pipe culvert diameter or height

0.7

If the excavation is exceeding 5 feet in depth and 20 sq ft . In palm area with a depth not more than 1 foot, is termed as __________

Surface Excavation

Elastic behavior of soil refers to as soil that ______

Regains its shape

Which factors contribute to health risk while working under cold conditions ?

Type of clothing Duration of exposure Work schedule

The maximum grade permitted for the urban highways on rolling terrain is ____%

The borrow definition of “borrow” is :

Earth material acquired in grade filling

Cement grouted pavement is classified as _______

Semi-rigid pavement

Slopes can be well maintained by ______

Landscaping ( landscaping can prevent erosion )

The sopping sight distance generally depends on :

Speed of vehicle Reaction time of driver Brake efficiency

What is the minimum standard scale used for preparation of the grading plan?

Shall not be less that 1”:40’

Fill density ( compaction ) test is generally done at every _______ cubic yards of filling.

1000 cu.yds

While calculating the sight distances , the driver’s eye above road surface assumed to be ______ feet

3 1/2 feet

When adding passing or climbing lanes or right turn lanes, what is the minimum width of the adjacent shoulder ?

4 feet

The type of grade separator, generally preferred at the intersection of two roads for the traffic to move without any interference, is _________

Clover leaf

Soil investigation report of two bore holes confirms that there is rock strata at the level of 8 feet from the surface. The bore holes are 40 feet apart. While excavating between the bore holes, it was found that the surface has normal soil and no rock was found. This condition is categorized as :

Unclassified excavation

Hot air blasting is one of the methods used for cleaning and drying the pavement cracks. The minimum are pressure to be maintained for this is _____ psi.

97 psi

What is the minimum vertical falsework clearance required over the freeways ?

15 feet

What is the MAXIMUM permitted slope steepness for the fill ?

2:1

What is the bottom most layer in a roadway design ?

Subgrade

The cold pour materials used for crack sealing are generally ________ based .

Silicon

Fineness test on cement is conducted to ascertain:

Rate of hydration Setting time Rate of hardening

CalTrans recommends the setback requirements for the building adjacent to the graded and natural terrain. What is the maximum setback requirement for the building at the toe of the slope ?

15 feet

The fabrics or grid interlayers placed between the pavement structure and the subgrade are called _______

Geosynthetics

The responsible person for the safety and health issues at the construction site is/are ________

Residential engineer

In restricted situations with two lanes highway on mountainous terrain, the rate of change of cross slopes shall not exceed ____% per 100 feet.

If the actual physical site conditions differ materially from the conditions represented in the contract document, the type of the site condition in this case would be what type ?

Type I

In a sloping terrain, it is recommended to use _______ travel lanes in order to reduce the cut and fill.

One way

As per standard, the total cost of the environment impacts due to mitigation activities, contributes to about ____% of the total project budget

The methods used for placing the crack treatment materials are:

Flush fill Overband Reservoir Back Rod

The most important requirement for the pervious pavement is _______

Ability of infiltration

As per standards , the maximum super elevation in hill roads shall NOT exceed ______%

10%

When the bituminous surfacing is done on already existing black top road or over existing cement concrete road, the type of treatment given is _______

Tack coat

If the R- value of the sub-grade is more than ______, the sub base is not recommended for the pavement.

For the conventional highways in one-way tunnels, the minimum side clearance from the edge of the travelled way shall be _____ on the left and ____ on the right

4’ 6” Left 6’ 0” Right

What is the maximum specified grade for the gutter at a driveway ?

20%

Penetration test on bitumen is used for determining its _____

Grade

The temperature under which the hot pour materials used for crack treatment must be with ______ ˚F

370˚ - 390˚

California Tilt-Oven test is used for testing the Asphalt _____

Durability

Per guidelines, the minimum lighting requirements for the nighttime working on highways is _____ lumens per square feet

5 lumens

Pavement tensile strength or the bond strength is measured by using _______

Tensile strength apparatus

Retaining walls that retain less than four feet of earth measured from the bottom of the footing , fall under which category ?

Category I

California R-Value is the key factor to decide pavement design and thickness. The thickness of the hot mixed asphalt for the pavement, with R-Value greater than 40 is _____

0.15

The maximum percentage of water absorption allowed for the aggregates used for road construction is ____%

0.6%

The import material used for the basement subgrade preparation shall be scratched to a depth of _____ inches below subgrade

6 inches

Street grades other than arterial and thoroughfares shall not exceed _____ %

15%

What is the general width of the barricade wall along the highway in hilly terrain ?

20 inches

The width of the crack sealant/filler material shall NOT exceed _____ inch on either side of crack

1/2”

What factors need to be considered for the construction project near a school ?

Impact or noise and vibration Air pollution Discharge

What is the minimum specified grade for the streets ?

According to the standards, what is the normal access width on expressways ?

30 feet

What is the maximum size of aggregate to be used for the surface course of the pavement ?

1/2”

According to the specifications, all surfaces shall be prevented from soil erosion by planting trees/shrubs , if the cut slopes exceeds ______ feet in height

5 feet

According to CalTrans standards, the type of cement used for cementitious stabilization of soils is/are what type ?

Type II and Type V

The minimum boring depth in soil exploration specified for a retaining wall is ______

2 times the wall height

The function of an expansion joint in rigid pavements is to :

Allow free expansion