Mehta- Chapter 11 Quiz Question

Soil and rock consist essentially of the same matter a. True b. False

A True

The building codes to not mandate geotechnical investigations for all building construction sites a. True b. False

A True

The four commonly used classification os soils arranged in order of decreasing particle size are a. gravel, sand, silt, and clay b. gravel, silt, sand, and clay c. gravel, silly, clay, and sand d. gravel, sand, clay, and silt e. none of the above

A gravel, sand, silt, and clay

A benched excavation is generally used a. on open suburban sites b. on tight downtown sites c. where the excavation depth is less than 5 ft. d. where dewatering of the site is not required

A on open suburban sites

In the Unified Soil Classification System, the symbol GP stands for a. poorly graded gravel b. pea gravel c. peat and gravel d. soil with good performance e. none of the above

A poorly graded gravel

The bearing capacity of a soil is generally expressed in terms of a. pounds or kips per square foot b. pounds of kips per square inch c. pounds of kips per cubic inch d. pounds or kips per inch e. pounds of kips

A pounds or kips per square foot

In the soldier piles and lagging system, the lagging generally consist of a. pressure-treated lumber b. pressure-treated plywood c. structural steel sections d. sheet steel e. none of the above

A pressure-treated lumber

In terms of soil behavior in earthquakes, building codes classify a construction site based on soil conditions. The primary property of soil that is used in this classification is a. the stiffness/density of soil b. the size of soil particles c. the swelling and shrinkage characteristics of soil d. whether the soil is native to the site e. none of the above

A the stiffness/density of soil

Cohesive soils are those in which the dry soil particles tend to separated from each other when mixed with a small amount of water a. True b. False

B False

In the bearing capacity of the soil is high, the footing area required is large a. True b. False

B False

To obtain soil-sampling tubes from below ground, which soil-testing method is commonly used? a. Test pit method b. Test boring method c. Test pressure method d. Any of the above e. none of the above

B Test boring method

The expansiveness of a soil is determined from the values of a. plastic limit and liquid limit b. liquid limit and plasticity index c. plastic limit and plasticity index d. none of the above

B liquid limit and plasticity index

Contagious bored piles are constructed using a. structural steel sections b. site-cast reinforced concrete c. precast concrete d. precast, prestressed concrete e. none of the above

B site-cast reinforced concrete

Which of the following soils has the lowest liquid limit? a. Clay b. Silt c. Sand d. Mixture of silt and play e. Mixture of silt and sand

C Sand

In terms of design and construction, secant piles are related to a. sheet piles b. soldier piles c. contagious bored piles d. none of the above

C contagious bored piles

During soil testing, soil samples are obtained form a. one central location on the site but from different depths below ground b. several locations on the site but from the same depth below ground c. several locations on the site and from several depths below ground d. none of the above

C several locations on the site and from several depths below ground

In the excavation support system using soldier piles, the soldier piles consist of a. sheet steel b. sheet aluminum c. structural steel sections d. reinforced concrete e. precast concrete

C structural steel sections

The maximum presumptive bearing capacity value of bedrock provided by the International Building Code is a. 18.0 ksf b. 16.5 ksf c. 15.0 ksf d. 12.0 ksf e. none of the above

D 12.0 ksf

Which of the following statements is correct? a. Gravel particles have a platelike shape b. Sand particles have a platelike shape c. Silt particles have a platelike shape d. Clay particles have a platelike shape

D Clay particles have a platelike shape

Which of the following is not used for excavation supports? a. Sheet piles b. Soldier piles c. Soil nailing d. Precast contrete piles e. Contiguous bored concrete piles

D Precast contrete piles

Soil nailing refers to a. a cut face of excavation supported by closely spaced steel bars to angles b. a cute face of excavation supported by closely spaced steel bars and shotcrete c. a cute face of excavation supported by closely spaced steel bars and shotcrete over WWR d. a cute face of excavation supported by closely spaced steel bars in grouted holes and shotcrete over WWR e. none of the above

D a cute face of excavation supported by closely spaced steel bars in grouted holes and shotcrete over WWR

Engineered till refers to the soil that is a. specially formulated to provide the required properties b. placed per the geotechnical engineer's specifications c. compacted per the geotechnical engineer's specifications and inspection d. all of the above e. none of the above

D all of the above

Sheet piles are used a. as shallow foundations in buildings b. as deep foundations in buildings c. as formwork for concrete walls d. as excavation supports e. none of the above

D as excavation supports

In the Unified Soil Classification System, the symbol M stands for a. medium-grained soil b. moist soil c. soil of medium plasticity d. none of the above

D none of the above

Tiebacks used with the anchored soldier pile system of excavation support consists of a. prestressing steel angle sections in grouted holes b. Structural steel angle sections in grouted holes c. reinforcing steel bars in grouted holes d. prestressing tendons or reinforcing steel bars in grouted holes e. none of the above

D prestressing tendons or reinforcing steel bars in grouted holes

Dewatering of an excavation, as described in this text, can be done by the a. pit method b. sump method c. well-point method d. (a) and (b) e. (b) and (c)

E (b) and (c)

All testing of soil samples is generally done at the site a. because modern soil sampling equipment is fully equipped with soil testing facility b. because the delay in bringing soil samples to the laboratory falsifies test results c. because the vibration of soil samples caused by transportation falsifies test results d. all of the above e. none of the above

E none of the above

Grading at a site refers to a. evaluating the existing subsurface conditions of a site b. evaluating the groundwater conditions at a site c. compacting the soil to required density d. all of the above e. none of the above

E none of the above

In the commonly used soil classification system, sand and silt are classified as a. coarse-grained soils b. fine-grained soils c. organic soils d. inorganic soils e. none of the above

E none of the above

The bearing capacity of a soil refers to a. the density of a soil b. the modulus of elasticity of soil c. the compressive strength of a soil d. whether the soil is native to the site e. none of the above

E none of the above

The center-to-center distance between secant piles is generally a. 5 to 8 ft. b. 8 to 12 ft. c. 10 to 15 ft. d. 15 to 20 ft. e. none of the above

E none of the above

An alternative to lagging that is commonly used with the soldier pile system of excavation support is a. pressure-treated lumber b. pressure-treated plywood c. structural steel sections d. sheet steel e. shotcrete over welded wire reinforcement (WWR)

E shotcrete over welded wire reinforcement (WWR)