New Mexico CID GA-1 Streets, Roads and Highways Examination

On an NMDOT hot-mix asphalt overlay, what is the primary purpose of a tack coat?

• ATo waterproof the existing pavement so water cannot enter the base
• BTo bond the existing surface to the new asphalt course
• CTo rejuvenate oxidized binder in the old pavement
• DTo prime a raw aggregate base before the first asphalt lift

Per NMDOT 2019 Section 423.3.5.1, the Contractor shall not place hot-mix asphalt on which of the following surfaces?

• AA dry milled asphalt surface that has been tacked
• BA dry concrete pavement that has been tacked
• CA wet or frozen surface
• DA previously placed HMA lift that has cooled overnight

Per NMDOT 2019 Section 423.3.5.1, HMA may be placed when the Chill Factor is at least which value and rising?

• A32 °F and rising
• B35 °F and rising
• C40 °F and rising
• D50 °F and rising

Per NMDOT 2019 Section 423.3.5.1, when the air temperature is 60 °F or warmer, how is Chill Factor treated for HMA placement?

• AChill Factor must still be at least 40 °F
• BDo not consider the Chill Factor
• CAdd 10 °F to the measured Chill Factor
• DPaving is prohibited regardless of Chill Factor

Per NMDOT 2019 Section 423.3.5.2, what may be used to keep HMA from sticking to roller wheels?

• ADiesel fuel sprayed lightly on the drums
• BKerosene or other petroleum diluents
• CWater, or water mixed with a very small quantity of detergent or other approved material
• DUsed motor oil wiped on the drums

Per NMDOT 2019 Section 407.3.4, the Project Manager sets the tack-coat spray rate to provide what residual asphalt-cement content?

• A0.01 to 0.03 gal per square yard
• B0.04 to 0.08 gal per square yard
• C0.15 to 0.25 gal per square yard
• D0.30 to 0.50 gal per square yard

Per NMDOT 2019 Section 423.3.5.4, longitudinal joints in successive HMA courses shall be offset at least how far from the joint in the underlying course?

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

Per NMDOT 2019 Section 423.3.5.4, where shall the Contractor avoid placing HMA longitudinal joints unless the Project Manager approves otherwise?

• AAt the centerline of a two-lane road
• BIn the wheel paths
• CAt the pavement edge next to the shoulder
• DOver a previously milled surface

Per NMDOT 2019 Section 423.3.5.4, unless otherwise specified, a transverse HMA joint shall have at least which taper?

• AA 1 ft taper with a slope no steeper than 6:1
• BA 3 ft taper with a slope no steeper than 24:1
• CA 10 ft taper with a slope no steeper than 50:1
• DA vertical butt joint with no taper

When paving under traffic, NMDOT 2019 Section 423.3.5.4 limits how long a tapered longitudinal HMA joint may remain exposed. What is that limit?

• A24 hours
• B3 days
• C7 days
• D14 days

Per NMDOT 2019 Section 423.5, Accepted HMA is paid by which pay units?

• ACubic yard only
• BTon or square yard
• CGallon of binder only
• DLinear foot of lane

Per NMDOT 2019 Section 407.5, Asphalt Material for Tack Coat is paid by the:

• AGallon at spray temperature
• BSquare yard of tacked surface
• CTon
• DLump sum

A common HMA yield check used in the Hot-Mix Asphalt Paving Handbook and state paving inspection is that 110 pounds per square yard equals about how much compacted thickness?

• A1/2 inch
• B1 inch
• C1-1/2 inches
• D2 inches

According to the Hot-Mix Asphalt Paving Handbook compaction sequence, where should the breakdown roller operate?

• ASeveral hundred feet behind the paver after the mat has set
• BImmediately behind the paver while the mix is still hot and workable
• COnly after the finish roller has removed the marks
• DOnly on the cold joint after the adjacent lane is placed

Which bituminous treatment is a light application of diluted emulsion used to seal a weathered asphalt surface, not to bond a new overlay?

• ATack coat
• BPrime coat
• CFog seal
• DChip seal

Per NMDOT 2019 Section 408, a prime coat is applied to which surface?

• AA newly placed HMA wearing course
• BA prepared, compacted aggregate base that is slightly moist but not saturated
• CA wet, frozen subgrade before base placement
• DAn existing HMA pavement immediately before an overlay

Per Asphalt in Pavement Maintenance (MS-16), interconnected fatigue cracks that form a chicken-wire or alligator pattern usually indicate which condition?

• AOnly a surface-texture problem that a fog seal will correct
• BStructural failure of the asphalt and supporting layers under repeated load
• CA construction joint that was not tacked
• DThermal shrinkage from a single cold night

A chip seal (bituminous surface treatment) consists of which combination?

• AA thin HMA overlay compacted with a vibratory breakdown roller
• BAn application of asphalt binder followed by a cover of one-sized aggregate that is rolle…
• CA slurry of emulsified asphalt, fine aggregate, and water placed with a spreader box
• DA light fog of diluted emulsion with no aggregate

Per NMDOT 2019 Section 424, warm-mix asphalt may be placed when the Chill Factor is at least which value and rising?

• A32 °F and rising
• B35 °F and rising
• C40 °F and rising
• D50 °F and rising

A 12-foot travel lane is to be paved 1 mile long with 2 inches of compacted dense-graded HMA. Using 110 lb per square yard per inch, how many tons of mix are required (no waste)?

• A387 tons
• B704 tons
• C774 tons
• D1,548 tons

A rectangular parking lot 200 ft by 150 ft will receive 3 inches of compacted dense-graded HMA. Using 110 lb per square yard per inch, how many tons are required (no waste)?

• A183 tons
• B367 tons
• C550 tons
• D825 tons

A paver covers 2,400 square yards with 180 tons of dense-graded HMA. Using 110 lb per square yard per inch, what compacted thickness does that yield indicate?

• A1.0 inch
• B1.4 inches
• C2.0 inches
• D2.5 inches

NMDOT 2019 Section 423.3.5.4 requires a transverse HMA joint taper of at least 3 ft at a slope no steeper than 24:1. What is the maximum vertical drop over that 3 ft taper?

• A0.75 inch
• B1.0 inch
• C1.5 inches
• D3.0 inches

An NMDOT overlay will be tacked at a residual asphalt-cement rate of 0.06 gal/SY over 8,000 SY. The emulsion is 50 percent residual asphalt. How many gallons of undiluted emulsion are required (no waste)?

• A240 gallons
• B480 gallons
• C960 gallons
• D1,920 gallons

Under current NMDOT Superpave mix designations, an SM-12.5 surface mix has which nominal maximum aggregate size?

• A9.5 mm (3/8 inch)
• B12.5 mm (1/2 inch)
• C19.0 mm (3/4 inch)
• D25.0 mm (1 inch)

Per NMDOT 2019 Section 203.2.1.2, unclassified excavation consists of:

• AOnly topsoil stripped from the right of way
• BThe excavation of all materials other than rock excavation obtained within the right of w…
• CContractor-furnished fill imported from off the right of way
• DRock that cannot be ripped with a 255 hp tractor

Per NMDOT 2019 Section 203.2.1.3, borrow is Contractor-provided suitable embankment material obtained from:

• AUnclassified excavation still available inside the right of way
• BAn approved source outside the right of way, unless the Contract says otherwise
• CAny convenient roadside ditch without approval
• DMilled asphalt pavement stockpiled on the project

Per NMDOT 2019 Section 203, roadbed embankment material shall be placed in uniform lifts not exceeding:

• A4 inches thick
• B8 inches thick
• C12 inches thick
• D18 inches thick

Per NMDOT 2019 Section 203.3.6, each layer of embankment shall be compacted to at least what percentage of maximum dry density by AASHTO T 180 (Modified Proctor)?

• A90 percent
• B92 percent
• C95 percent
• D100 percent

Per NMDOT 2019 Section 203.3.6, for soils that are not high-plasticity (PI less than 15), in-place moisture at compaction shall be:

• AAny moisture the Contractor chooses
• BNot less than 5 percent below optimum and not greater than 2 percent above optimum
• CAlways at least 4 percent above optimum
• DOven-dry

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

• ABetween oven-dry and 5 percent below optimum
• BBetween optimum moisture and optimum plus 4 percent
• CAt least 8 percent above optimum
• DThe same 5-percent-below to 2-percent-above window used for low-PI soils

Per NMDOT 2019 Section 203.2.1.1, material is classified as rock excavation by the seismic test when seismic velocity is greater than:

• A2,000 ft/s
• B4,000 ft/s
• C6,000 ft/s
• D10,000 ft/s

Per NMDOT 2019 Section 203.2.1.1, boulders or detached stones are rock excavation by the handling test when they have a volume greater than:

• A1 cubic foot
• B1 cubic yard and cannot be readily broken down with excavation equipment
• C5 cubic yards regardless of breakability
• D10 cubic yards only if they are sandstone

Per NMDOT 2019 Section 303, Base Course shall be compacted to at least what percentage of maximum density by AASHTO T 180, Method D (TTCP Modified)?

• A90 percent
• B95 percent
• C96 percent
• D100 percent

Per NMDOT 2019 Section 303.3.3, the Base Course surface tolerance shall not exceed:

• A1/8 inch within 10 feet
• B1/4 inch within 10 feet
• C1/2 inch within 10 feet
• D1 inch within 10 feet

Per NMDOT 2019 Section 203.5, Unclassified Excavation and Borrow are paid by the:

• ATon
• BCubic yard
• CSquare yard
• DLinear foot

When NMDOT pays earthwork on the final cross-sectioned volume, how are shrinkage and swell handled?

• AA 15 percent shrinkage factor is always deducted
• BA 25 percent swell factor is always added to rock
• CThe Department will not apply any shrinkage or swell factor
• DThe Contractor may pick any factor in the bid

A roadside slope shown as 2:1 (H:V) means:

• A2 feet vertical for each 1 foot horizontal
• B2 feet horizontal for each 1 foot vertical
• CA 2 percent grade along centerline
• DA 26-degree OSHA Type A trench slope

A rectangular cut is 300 ft long, 24 ft wide, and 2 ft deep. What is the bank volume in cubic yards?

• A178 cubic yards
• B444 cubic yards
• C533 cubic yards
• D1,600 cubic yards

Using the average-end-area method, a 50-foot station has end areas of 45 ft² and 75 ft². What is the volume?

• A56 cubic yards
• B111 cubic yards
• C222 cubic yards
• D3,000 cubic yards

A fill needs 2,000 compacted cubic yards. The borrow soil shrinks 20 percent from bank to compacted volume. How many bank cubic yards must be excavated?

• A1,600 BCY
• B2,000 BCY
• C2,400 BCY
• D2,500 BCY

A rock cut measures 800 bank cubic yards. If the rock swells 25 percent when blasted and loaded, how many loose cubic yards must be hauled?

• A600 LCY
• B800 LCY
• C1,000 LCY
• D1,067 LCY

A roadway template is 24 ft wide at subgrade. Both side slopes are 2:1 (H:V) in an 8-ft-deep cut through level ground. What is the top width of the cut?

• A32 feet
• B40 feet
• C56 feet
• D64 feet

Cross-section areas at Station 10+00 and Station 11+00 are 120 ft² and 80 ft². Using average end area over the 100-ft station, what is the volume?

• A185 cubic yards
• B370 cubic yards
• C444 cubic yards
• D741 cubic yards

On-site cut yields 4,500 BCY of soil that shrinks 10 percent. The project needs 5,000 CCY of embankment. How much additional borrow (bank cubic yards) is required if the borrow also shrinks 10 percent?

• A500 BCY
• B556 BCY
• C1,000 BCY
• D1,056 BCY

Before non-emergency excavation in New Mexico, the excavator must give New Mexico One Call (811) advance notice of at least:

• A2 working hours
• B2 working days
• C5 calendar days
• D10 working days