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NICET LEVEL 3 HIGHWAY CONSTRUCTION
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NICET LEVEL 3 HIGHWAY CONSTRUCTION NEWEST 2024 ACTUAL EXAM 280 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+.
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NICET LEVEL 3 HIGHWAY CONSTRUCTION NEWEST2024 ACTUAL EXAM 280 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+.
What is Mechanically Stabilized Earth (MSE)? - ANSWER >>>A
Mechanically Stabilized Earth (MSE) retaining wall is a composite
structure consisting of alternating layers of compacted backfill and soil
reinforcement elements, fixed to a wall facing
What is A Mechanically Stabilized Earth (MSE) derived from? -
ANSWER >>>The stability of the wall system is derived from the
interaction between the backfill and soil reinforcements, involving
friction and tension. The wall facing is relatively thin, with the primary
function of preventing erosion of the structural backfill. The result is a
coherent gravity structure that is flexible and can carry a variety of
heavy loads.
What are Common Causes for MSE Wall Failures? - ANSWER
>>>Mechanically Stabilized Earth (MSE) walls are routinely
constructed without adequate drainage or compaction, using widely
spaced reinforcement and low-quality, on-site clay soils. These lapses
can cause significant movement or collapse of a section, hindering a
wall's performance.
What are the benefits of repairing an MSE Wall In-Place? - ANSWER
>>>Repair and rehabilitation of an MSE wall is often 30% of the total
replacement cost, and our crews can complete the work around
existing structures.
What is used for Temporary Soil Stabilization? - ANSWER
>>>Temporary cover (mulch, plastic, rolled erosion control product, or
tackifier) and / or Temporary turf establishment (Apply seed and mulch
for soil erosion protection and protect it until permanent turf is in place)
,What are the Permanent Soil Stabilization elements on permanent
slopes? - ANSWER >>>(a) Turf establishment. Apply seed, fertilizer,
and mulch. (b) Plants, trees, shrubs, vines, groundcovers, and other
plants. Furnish and plant trees, shrubs, vines, groundcovers, and
other plants. (c) Sod. Furnish and place sod of perennial turf-forming
grasses. (d) Rock mulch. Furnish and place rock on finished surfaces.
What is "Mass concrete"? - ANSWER >>>Mass concrete is "any
volume of concrete with dimensions large enough to require that
measures be taken to cope with generation of heat from hydration of
the cement and attendant volume change to minimize cracking".
What are some of the other names "Drilled Shafts" are called? -
ANSWER >>>Drilled piers, caissons, cast-in-drilled-hole piles (CIDH -
Caltrans terminology), and bored piles (Europe)
What is a Caisson? - ANSWER >>>A boxlike structure used in
construction work underwater or as a foundation. It is usually
rectangular or circular in plan and may be tens of metres in diameter.
What are the different types of concrete bridge decks? - ANSWER
>>>1. Straight bridges 2. Bridges with curved geometry 3. Arch
bridges 4. Suspension bridges
What are "Arch" bridges? - ANSWER >>>The arch has a load-bearing
function for the piles and the roadway above, discharging all the
forces on the foundations through the arch. This type is chosen to
span long distances when support on the ground is not possible.
What is a "suspension" bridge? - ANSWER >>>They allow the
spanning of very large distances and feature piles that transmit the
loads to the foundation supporting the deck by means of traction
elements (tie rods or steel cables).
What is a Gabion basket? - ANSWER >>>Gabion baskets are
typically rectangular wire mesh baskets (made with galvanized wire)
filled with small rock of approximately 100-250mm in diameter. The
,gabion baskets are often placed on top of one another in the form of a
vertical or terraced retaining wall against a riverbank to prevent further
erosion of the bank.
What is the "clear zone"? - ANSWER >>>The portion of the roadside,
including the shoulder, available for the safe use by an errant vehicle
in which the driver may regain control of the vehicle.
What is a "Culvert"? - ANSWER >>>A structure, not classified as a
bridge, that provides an opening under the roadway.
What is "Density"? - ANSWER >>>Mass per unit volume of material.
Specific gravity multiplied by the density of water
What is a "Lane Mile"? - ANSWER >>>An area of pavement one mile
(kilometer) long and one lane wide; not including turn lanes, turnouts,
parking area lanes, or other auxiliary lanes.
What are most highway light or sign supports made from? - ANSWER
>>>Most support structures are fabricated from structural steel tubes,
angles, and plate or from
aluminum tubes, angles and plate.
What is the most common type of weather protection used for sign
and light steel? - ANSWER >>>Though some ancillary steel structures
may be painted, protection is most often provided by use of
galvanizing or fabrication using weathering steel. Galvanizing is
performed using the hot dip
process.
What are "Driven Piles"? - ANSWER >>>Driven piles are
prefabricated structural elements which are installed into the ground
with a pile driving hammer
What are "Micropiles"? - ANSWER >>>Micropiles are drilled piles
which are typically less than 12 inches diameter and constructed using
, a high strength steel rod or pipe which is grouted into the bearing
formation
What are "Drilled Shaft Foundations"? - ANSWER >>>Drilled shaft
foundations are formed by excavating a hole, typically 3 to 12 feet in
diameter, inspecting the soil or rock into which the foundation is
formed, and constructing a cast-in-place reinforced concrete
foundation within the hole
What work is included in "Embankment Construction"? - ANSWER
>>>(1) Preparing foundation for embankment; (2) Constructing
roadway embankments; (3) Benching for side-hill embankments; (4)
Constructing dikes, ramps, mounds, and berms; and (5) Backfilling
subexcavated areas, holes, pits, and other depressions.
What is "Conserved Topsoil"? - ANSWER >>>Excavated material
conserved from the roadway excavation and embankment foundation
areas that is suitable for growth of grass, cover crops, or native
vegetation.
When preparing embankments over an existing asphalt, concrete or
gravel road surface, how deep is the minimum depth you need to
scarify? - ANSWER >>>6 inches.
What is the method of embankment construction within the roadway
prism? - ANSWER >>>Place embankment material in horizontal
layers not exceeding 12 inches in compacted thickness. Incorporate
oversize boulders or rock fragments into the 12-inch layers by
reducing them in size or placing them individually as required by
Subsection 204.10(c). Compact each layer according to Subsection
204.11 before placing the next layer.
Describe the steps involved in Sanitary (sewer) line installation. -
ANSWER >>>Inspect each joint and clean the pipe and bell before
placing in the trench. Lay the sewer line from the lower end with the
spigot ends pointing in the direction of flow. Fully support each length
between joints and check for line and grade before placing the next
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