New Mexico CID GA-3 Curbs, Gutters and Culverts Examination

Per NMDOT 2019 Section 203.3.6, the maximum dry density used to control moisture and density of roadway embankment is determined by which test?

• AAASHTO T 180 (Modified Proctor), Method A or D (TTCP Modified)
• BASTM D698 (Standard Proctor) only
• CAASHTO T 191 (sand cone) only
• DAASHTO T 99 (Standard Proctor), Method C

Per NMDOT 2019 Section 203.3.6, each layer of roadway embankment shall be compacted to at least what percentage of maximum dry density?

• A90 percent
• B95 percent
• C98 percent
• D100 percent

Per NMDOT 2019 Section 203.3.5.1, roadbed embankment material shall be placed in uniform lifts not exceeding what loose thickness?

• A6 inches
• B8 inches
• C12 inches
• D4 inches

Per NMDOT 2019 Section 203.3.6, at the time of compaction of ordinary (PI less than 15) embankment soils, in-place moisture shall be within which range of optimum moisture content?

• ANot less than 5 percent below optimum and not greater than 2 percent above optimum
• BNot more than 3 percent below or 3 percent above optimum
• COptimum to optimum plus 4 percent
• DOptimum only, with no tolerance

Per NMDOT 2019 Section 203.3.6, for soils with a plasticity index of 15 or greater, moisture at the time of compaction shall be:

• AFrom optimum moisture to optimum moisture plus 4 percent
• BFrom optimum minus 5 percent to optimum plus 2 percent
• CFrom optimum minus 3 percent to optimum plus 3 percent
• DBone dry to prevent pumping

Per NMDOT 2019 Section 203.3.4, when may the contractor begin paid borrow placement for embankment?

• AAs soon as the first cut is opened
• BAfter suitable unclassified excavation from the project has been exhausted and written no…
• CWhenever the borrow pit is closer than the cut
• DOnly after the entire project is graded to subgrade

Per NMDOT 2019 Section 203.4.3, earthwork pay quantities from original-to-final cross sections:

• AInclude a 15 percent shrinkage factor on all fills
• BApply no shrinkage or swell factor because payment is the neat final cross-sectioned volu…
• CInclude a 25 percent swell factor on all rock cuts
• DAre always bank measure multiplied by 1.25

Per NMDOT 2019 Section 203.4.3, certified earthwork cross sections shall be taken at what interval unless the Contract or Project Manager directs otherwise?

• A50 feet
• B100 feet
• C25 meters
• D25 feet

Per NMDOT 2019 Section 203.3.5.1, before placing roadbed embankment the original ground surface shall be broken up to at least what depth by plowing, scarifying, or stepping up?

• A6 inches
• B12 inches
• C18 inches
• D2 feet

Per NMDOT 2019 Section 203.3.5.1, rocks placed in ordinary roadbed embankment shall be no larger than which dimension, provided interstices are filled to form a dense mass?

• A6 inches
• B3 feet in any dimension
• COne-half the lift thickness only
• D10 feet in any dimension anywhere in the fill

Per NMDOT 2019 Section 203.3.5.1, rock embankments shall be constructed to a maximum of how far below subgrade elevation?

• A2 inches
• B6 inches
• C12 inches
• D24 inches

Using the average-end-area method, what is the cut volume between Station 10+00 (40 ft² cut) and Station 10+50 (68 ft² cut)?

• A100 cubic yards
• B54 cubic yards
• C108 cubic yards
• D50 cubic yards

Per NMDOT 2019 Section 203-A.3, proof-rolling of subgrade before base or stabilization uses which equipment?

• AA pneumatic roller weighing at least 25 tons or a 4,000-gallon water truck filled to capa…
• BA walk-behind plate compactor
• CA loaded pickup truck
• DA 5-ton steel-wheel tandem roller only

Per NMDOT 2019 Section 203-A.1, paid unstable-subgrade stabilization applies to saturated, soft, gummy, or pumping soils within and not exceeding what depth of finished subgrade, when not caused by the contractor?

• AThe top 6 inches only
• BThe top 2 feet
• CThe top 4 feet
• DAny depth encountered

Per NMDOT 2019 Section 203-A.4, unstable-subgrade stabilization is measured by the:

• ACubic yard of material removed
• BSquare yard, regardless of depth up to 2 feet
• CLinear foot of roadway centerline
• DTon of stabilizer

Per NMDOT 2019 Section 801.1.3 and NMSA 61-23-27.13, who must be in responsible charge of construction staking surveys for public work involving surveying?

• AA New Mexico licensed professional surveyor
• BThe Project Manager only
• CA certified welding inspector
• DAny experienced grade checker

Per NMDOT 2019 Section 801.3.7.4, grade finishing stakes (blue tops) at the top of subgrade, base, and subbase shall be set at intervals of no more than:

• A50 feet
• B100 feet
• C25 feet
• D200 feet

Per NMDOT 2019 Section 801.3.7.3, slope stakes and stationing shall be set at intervals no greater than:

• A25 feet
• B100 feet
• C50 feet
• D500 feet

Per NMDOT 2019 Section 801.3.1, what charge applies for each monument the contractor improperly references before disturbing, covering, or removing it?

• AUSD 250
• BUSD 1,000
• CUSD 500
• DUSD 5,000

Per NMDOT 2019 Section 801.3.7.5, before constructing a drainage structure the contractor shall:

• ASurvey and plot the drainage-structure location and submit plotted profiles with a revise…
• BRely on the plan profile without field verification
• CWait until backfill is complete to survey the structure
• DSet only a single invert hub and begin excavation

Using average end area, what is the fill volume between Station 8+00 (54 ft² fill) and Station 9+00 (72 ft² fill)?

• A117 cubic yards
• B233 cubic yards
• C200 cubic yards
• D315 cubic yards

Per NMDOT 2019 Sections 203.3.6 and 206.3.1, field density and moisture of compacted soils are typically measured by nuclear methods in accordance with:

• AAASHTO T 22
• BASTM C39
• CAASHTO T 310
• DAASHTO T 97

Per NMDOT 2019 Section 203.3.5, embankment construction shall be suspended when:

• AAir temperature drops below 50 °F even if soils are unfrozen
• BThe Project Manager is off site for lunch
• CEmbankment materials become frozen, or fill would be placed on frozen earth
• DNuclear gauge batteries are being charged

Per NMDOT 2019 Section 203.3.5, new embankments shall be benched into natural slopes, existing embankments, or phased fills. Benches shall be:

• AWide enough to allow operation and placement of compacting equipment
• BCut only in rock, never in soil
• CPaid as a separate unclassified excavation item in every case
• DExactly 6 inches wide regardless of equipment

A rectangular trench for a driveway culvert is 3.0 ft wide, 4.0 ft deep, and 90 ft long. What is the neat excavation volume?

• A30 cubic yards
• B40 cubic yards
• C27 cubic yards
• D48 cubic yards

Per NMDOT 2019 Section 207.3.1, the top surface of finished subgrade along centerline shall not vary by more than:

• A0.05 foot above or below established grade
• B0.1 foot above or below established grade, and 0.05 foot from the typical section measure…
• C1/4 inch in 10 feet
• D0.25 foot in any direction

Per NMDOT 2019 Section 207.3, the top 2 feet of borrow materials in the finished subgrade shall be comprised of material that meets:

• AAny soil as long as it is compacted to 90 percent
• BAASHTO A-7-6 clay only
• CThe project design R-value
• D100 percent passing the No. 200 sieve

Per NMDOT 2019 Section 509.2.7.1, Class A concrete used for cast-in-place sidewalks, curb and gutter, and concrete wall barrier has a specified compressive strength of:

• A3,000 psi at 28 days
• B4,000 psi at 28 days
• C5,000 psi at 14 days
• D2,500 psi at 28 days

Per NMDOT 2019 Sections 509.2.7.1 and 609.2.1, which concrete class is required for slip-formed curb and gutter?

• AClass F
• BClass G
• CClass AA
• DClass P only

Per NMDOT 2019 Table 509.2.7.2:1, the maximum water-cementitious materials ratio for Class A concrete under the tabulated mix-proportion method is:

• A0.50
• B0.45
• C0.40
• D0.35

Per NMDOT 2019 Section 510.2.3, mixing and curing water shall have a pH between which values, and sulfate or chloride contents shall not exceed:

• ApH 4.0 to 10.0; 5,000 ppm
• BpH 7.0 exactly; 100 ppm
• CpH 6.0 to 8.5; 1,000 ppm
• DpH 5.0 to 9.0; 2,500 ppm

Per NMDOT 2019 Section 509.2.2.1, Types II, III, and V portland cement shall have an alkali content less than what value as Na2O + 0.658 K2O when tested under AASHTO T 105?

• A0.60 percent
• B0.20 percent
• C1.00 percent
• D1.50 percent

Per NMDOT 2019 Section 510.3.4.2, concrete arriving at the project with a temperature greater than which value shall be rejected?

• A90 °F
• B80 °F
• C70 °F
• D100 °F

Per NMDOT 2019 Section 510.3.4.2, the maximum mixing time for concrete hauled in truck mixers or truck agitators is 90 minutes, but shall not exceed 60 minutes when:

• AConcrete temperature is 80 °F or above for bridge decks or approach slabs, or 85 °F for o…
• BThe slump is less than 2 inches
• CAmbient air is below 40 °F
• DAny admixture is used

Per NMDOT 2019 Section 510.3.1.4, the allowable field slump for non-superplasticized Class A concrete is:

• A0.5 to 2 inches
• B6 to 9 inches
• C3.5 inches ± 1.0 inch
• D8 inches maximum before any water is added

A rectangular concrete header curb is 6 inches wide and 18 inches high. How many cubic yards of concrete are required for 216 linear feet, with no waste?

• A6.00 cubic yards
• B8.00 cubic yards
• C9.00 cubic yards
• D4.00 cubic yards

A concrete sidewalk is 5.0 ft wide and 4 inches thick. How many cubic yards are required for 81 linear feet, with no waste?

• A5.00 cubic yards
• B3.00 cubic yards
• C6.75 cubic yards
• D8.00 cubic yards

Per NMDOT 2019 Section 510.3.1.4, field air content for structural concrete in a high-risk freeze-thaw zone shall be:

• ALess than 3 percent, with no air-entraining agent
• BFrom 4.5 percent to 8.0 percent
• CFrom 5.5 percent to 8.0 percent
• DAny air content above 2 percent

Per NMDOT 2019 Section 509.2.2, unless otherwise specified the supplier shall use Type II, III, or V portland cement (or a blended cement based on Type II or V). Which statement is correct?

• AType I cement is the only cement allowed on NMDOT curb work
• BType III and Type V may be used only if specified or authorized by the State Concrete Eng…
• CWhite cement is required for all Class F slip-form curb
• DMasonry cement may substitute for portland cement in Class A

Per NMDOT 2019 Section 509.2.2.2, Class C fly ash shall not be used in concrete that is:

• AExposed to sulfate environments or made with potentially reactive or reactive aggregate
• BPigmented for median paving
• CPlaced at night
• DUsed only for interior building slabs

Per NMDOT 2019 Table 509.2.3.1:1, the required fineness modulus of fine aggregate is:

• A1.0 to 1.8
• B2.3 to 3.1
• C3.5 to 4.2
• D4.0 to 5.0

An NMDOT Class A mix uses the Table 509.2.7.2:1 minimum of 560 lb of cementitious material per cubic yard. How many 94-lb sacks of portland cement are required for 4.0 cubic yards if cement is the only cementitious material?

• A18 sacks
• B20 sacks
• C24 sacks
• D28 sacks

Per NMDOT 2019 Section 609.3.6, spaces behind new concrete curb shall not be backfilled until the concrete attains a compressive strength of at least:

• A2,500 psi
• B2,000 psi
• C3,000 psi
• D1,000 psi

In the Greenbook (SSPWC) 2006 concrete-class designation 520-C-2500, the number 520, the letter C, and 2500 mean, respectively:

• A520 psi at 7 days, 1-inch slump, 2,500 lb of aggregate
• B520 sacks per mixer, coarse sand, 2,500 °F kiln temperature
• C520 lb of water per cubic yard, 3/8-inch aggregate, 2,500 lb of cement
• D520 lb of cement per cubic yard, 1-inch maximum aggregate, 2,500 psi 28-day compressive s…

Per NMDOT 2019 Section 609.2.1, concrete curb and gutter that is cast directly into forms shall use which class?

• AClass A
• BClass F
• CClass G
• DClass HES only

Per NMDOT 2019 Section 609.4, concrete curb is measured for payment along the:

• ABack of sidewalk
• BFront face of the curb section
• CRight-of-way line
• DCenter of the nearest travel lane

Per NMDOT 2019 Section 609.4, gutter and curb-and-gutter combinations are measured along the:

• ATop of curb front face
• BLip of gutter at the pavement joint only
• CFlowline of the gutter
• DBack of curb