New Mexico CID GA-2 Maintenance and Repair Examination

On an asphalt street, interconnected cracking that forms a chicken-wire or alligator pattern most often indicates which pavement condition?

• AFatigue failure of the asphalt layer over a weak or moisture-damaged support
• BSurface oxidation of the binder with no structural involvement
• CA single thermal contraction crack that has not branched
• DExcess tack coat bleeding through a new overlay

A bowl-shaped pothole in an asphalt lane most commonly starts from which combination of conditions?

• AA fog seal that was applied on a cool morning
• BLocalized alligator cracking or surface breakup plus water and traffic
• CA chip seal with 50 percent chip embedment
• DA longitudinal cold joint that was rolled from the hot side only

Bleeding on an asphalt pavement is best described as which surface condition?

• ALoss of fine aggregate that leaves a coarse, open texture
• BA depression confined to the wheel path from mix instability
• CA film of excess asphalt that rises to the surface and can become slick
• DA map of rectangular cracks caused by binder shrinkage

Raveling of an asphalt surface is the progressive loss of which materials?

• AOnly the liquid tack film under a new overlay
• BDowel bars from a concrete joint that was overlaid with asphalt
• CPrime coat from an untreated subgrade that was never paved
• DAggregate particles from the pavement surface, often starting with the fines

A fog seal is applied to an existing asphalt surface primarily to do which of the following?

• APlace a light application of diluted asphalt emulsion to seal and enrich the surface
• BAdd several inches of structural thickness for heavy trucks
• CFill deep ruts and restore cross slope in one pass
• DReplace a failed base under alligator cracking

Per NMDOT 2019 Section 407, a tack coat is applied to an existing pavement primarily to provide which result?

• AA penetrating prime that binds an untreated aggregate base
• BA bond between the existing surface and the new asphalt course
• CA wearing surface that replaces the need for an overlay
• DA dust palliative on an unpaved detour

A chip seal (asphalt seal coat) is constructed by applying which two materials in sequence?

• APortland cement grout, then a sand blotter
• BA thick hot-mix overlay, then a fog seal only on the joints
• CA liquid asphalt binder, then a one-size cover aggregate that is rolled into the binder
• DA slurry mixture first, then a chip seal on top of the slurry

The throw-and-roll pothole method is best classified as which type of repair?

• AA full-depth structural reconstruction of the lane
• BA routed-and-sealed working-crack treatment
• CA microsurfacing rut-fill pass
• DAn emergency or temporary fill in which mix is placed and rolled with truck tires

Per NMDOT 2019 Section 408, a prime coat is applied for which primary purpose?

• ATo provide and apply asphalt material, and blotter if required, to an existing untreated…
• BTo bond a new HMA overlay to an existing asphalt or concrete pavement
• CTo seal working concrete pavement joints with silicone
• DTo mill the existing asphalt to a uniform profile

Rutting in an asphalt wheel path is best described as which distress?

• AA random map of rectangular shrinkage cracks
• BA longitudinal surface depression caused by consolidation or lateral movement of the mix…
• CA polished, slick film of free asphalt with no change in cross slope
• DA single crack that crosses the lane at a right angle

In asphalt pavement maintenance, crack sealing is the preferred treatment when the crack is which type?

• AA nonworking, tightly closed hairline crack with no movement
• BA full-depth punchout in a concrete slab
• CA working crack that opens and closes with temperature and needs a reservoir and flexible…
• DA bleeding wheel-path film with no crack present

Per NMDOT 2019 Section 411.3.3, cracks with an average clear opening less than 1/2 inch shall be routed to which minimum reservoir?

• A1/4 inch wide and 1/4 inch deep
• B1 inch wide and 2 inches deep on every crack
• CNo routing; only a surface overband is permitted
• D1/2 inch wide and from 3/4 inch to 1 inch deep, unless the Project Manager directs otherw…

Per NMDOT 2019 Section 411.3.4, hot-poured crack sealant shall be placed to which finished elevation?

• AFrom 3/8 inch to 1/4 inch below the existing roadway surface
• BFlush with the pavement and then squeegeed 2 inches onto each side
• C1 inch above the pavement to form a traffic-bearing band
• DEven with the bottom of the routed reservoir only

Per NMDOT 2019 Section 411.3.1, unless the manufacturer requires otherwise, hot-poured crack sealant may be placed only when which weather conditions exist?

• AAny air temperature as long as the sealant is heated to 500 °F
• BAir at least 40 °F and rising, pavement surface above 32 °F, and the surface dry
• CDuring rain, provided a blotter sand is broadcast immediately
• DOnly when the pavement surface is below freezing so the crack is wide open

A semi-permanent (cut-and-patch) asphalt pothole repair typically includes which sequence?

• AThrow cold mix into standing water and leave it uncompacted
• BFog-seal the hole and open it to traffic immediately
• CSquare-cut the failed area, remove loose material, dry and tack the sides, place hot mix,…
• DFill the hole with dry sand and cover it with a chip seal only

Spray-injection pothole patching places repair material by which process?

• AHand-shoveling hot mix behind a paver screed
• BHeating the existing mat with infrared panels and raking it level with no new aggregate
• CSaw-cutting a concrete slab and grouting dowels
• DBlowing emulsion and aggregate into the cleaned hole so the mixture coats and fills the v…

A full-depth asphalt dig-out (deep patch) is the appropriate maintenance treatment when which condition is present?

• AAlligator cracking with a weak, wet, or failed base that must be removed and rebuilt
• BHairline surface oxidation with no cracking
• CA single sealed transverse crack that is not faulted
• DA fog-sealed parking lot that is still black and tight

A Cape seal is which combination of bituminous surface treatments?

• AA fog seal followed immediately by a prime coat
• BA chip seal that is later covered with a slurry seal
• CTwo successive hot-mix overlays with no tack
• DA microsurfacing placed under a chip seal

How does microsurfacing differ from a conventional slurry seal in a way that matters on a maintenance project?

• AMicrosurfacing is a 3-inch structural overlay, while slurry is a concrete topping
• BA slurry seal can be placed in freezing rain, while microsurfacing cannot
• CMicrosurfacing uses a chemical break and polymer-modified emulsion and can be used to fil…
• DMicrosurfacing requires no aggregate, only a fog of neat emulsion

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

• A0.004 to 0.008 gallon per square yard
• B0.40 to 0.80 gallon per square yard
• C4.0 to 8.0 gallons per square yard
• D0.04 to 0.08 gallon per square yard

Per NMDOT 2019 Section 407.2, which materials are acceptable for tack coat unless the Project Manager approves another listed product?

• ACSS-1, CSS-1H, SS-1, or SS-1H emulsified asphalt, or a performance-graded asphalt binder
• BOnly MC-70 cutback asphalt
• COnly ASTM D 6690 hot-poured joint sealant
• DOnly neat portland cement slurry

Per NMDOT 2019 Section 407.3.1, tack coat shall not be applied in which condition?

• AOn a dry, swept existing asphalt surface
• BOn a wet surface
• CWhen using a pressure distributor with open nozzles
• DWhen the residual target is 0.06 gallon per square yard

Per NMDOT 2019 Section 407.3.3, surfaces and edges to be tack coated shall be in which condition?

• ALeft covered with millings so the tack can bind the loose material
• BSaturated with water so the emulsion will dilute in place
• CDry, patched, cleaned, and free of dirt, surface moisture, vegetation, and other deleteri…
• DCovered with a sand blotter before any tack is sprayed

A chip seal on a structurally sound asphalt street is used primarily to do which of the following?

• AReplace a failed base under severe alligator cracking
• BProvide the only required bond coat under a 3-inch HMA overlay
• CCorrect deep rutting without a leveling course
• DWaterproof the surface, seal small cracks, and restore surface friction

A conventional slurry seal is a mixture of which principal materials?

• AAsphalt emulsion, graded aggregate, water, and mineral filler
• BPortland cement, coarse gravel, and curing compound only
• CHot PG binder and one-size cover stone only
• DNeat emulsion sprayed with no aggregate

Per NMDOT 2019 Section 407.3.4, pressure-distributor nozzles for tack coat shall be in which condition?

• AEvery other nozzle closed to create a streaked residual film
• BFully open and set at the same angle from the spray bar, approximately 30 degrees
• CAimed straight down at 90 degrees with half the nozzles plugged
• DRemoved so the tack is poured from a bucket

Applying substantially more tack than the specified residual rate most often causes which overlay problem?

• AA stronger mechanical interlock and higher density
• BFaster emulsion break and a drier bond
• CA slip plane or bleeding through the new surface because the extra asphalt acts as a lubr…
• DAutomatic correction of a dirty, dusty pavement

A longitudinal crack that follows a paving lane joint on an otherwise sound asphalt pavement is most often caused by which condition?

• AA single freeze-thaw cycle in the concrete base only
• BExcess fog seal on the shoulder
• CCorrectly placed tack at 0.06 gallon per square yard residual
• DA poorly constructed or inadequately compacted cold joint between paving lanes

Transverse cracks that cross an asphalt lane at roughly regular spacing and are not load-related are typically which type of distress?

• AThermal or shrinkage cracks from temperature cycling of the asphalt layer
• BFatigue (alligator) cracking from a failed base
• CEdge cracking from lack of shoulder support only in the wheel path
• DReflection of a chip-seal joint from the same day

Block cracking that divides an aged asphalt surface into large rectangles is primarily associated with which mechanism?

• APunchout failure of a continuously reinforced concrete slab
• BBinder aging and shrinkage of the asphalt layer, often on a low-volume pavement
• CExcess residual tack under a new overlay
• DA single poorly compacted longitudinal joint

Shoving of an asphalt surface is best described as which distress?

• AA polished aggregate surface with no change in profile
• BA thermal crack that has been correctly sealed below the surface
• CA plastic, wave-like displacement of an unstable mix, often at intersections or on grades
• DLoss of chips from a fog seal

Polishing of an asphalt surface is a concern primarily because it produces which result?

• AA gain in macrotexture and higher splash drainage
• BA structural increase in pavement thickness
• CAutomatic sealing of working thermal cracks
• DA smooth, slippery wearing surface as aggregate is worn down by traffic

Infrared (heater) patching of an asphalt defect typically includes which steps?

• ASoftening the existing mat with a heater, raking the cracked material, adding mix if need…
• BSaw-cutting full depth, removing the slab, and installing dowels
• CSpraying only a fog seal and opening the lane without compaction
• DPlacing a Cape seal over standing water

Reflection cracking in a new asphalt overlay is caused by which mechanism?

• AA fog seal that was too light
• BMovement of cracks or joints in the underlying pavement that propagate through the new ov…
• CUsing CSS-1H tack instead of SS-1
• DRolling the breakdown pass while the mat is still above 300 °F

Cold milling an existing asphalt surface before an overlay is done primarily to accomplish which result?

• ALeave a contaminated, polished surface so tack is unnecessary
• BIncrease the structural thickness of the old pavement without adding mix
• CRestore profile and cross slope, remove distressed surface material, and provide a clean…
• DEliminate the need to patch potholes or failed base areas

In a conventional hot-mix compaction train, which roller works the hottest mat and obtains most of the density?

• AThe finish roller in static mode after the mat has cooled
• BA pneumatic roller used only to erase steel-wheel marks after finish rolling
• CA steel roller used the next morning after the mat has set
• DThe breakdown roller immediately behind the paver

The conventional three-roller hot-mix compaction train, in order, is which sequence?

• ABreakdown, then intermediate (often pneumatic), then finish steel in static mode
• BFinish steel, then breakdown, then pneumatic intermediate
• CPneumatic only, with no steel-wheel rollers
• DVibratory finish roller first, then a cold static pass

When constructing a longitudinal joint between two hot-mix lanes, which practice produces the most durable joint?

• ALeave a 6-inch open gap so rain can drain from the first lane
• BOverlap the hot lane onto the cold lane, keep the joint well compacted, and tack a cold f…
• CStop the breakdown roller 2 feet short of the joint on both sides
• DPlace the second lane after the first lane has been opened to traffic for several weeks w…

A transverse construction joint at the end of a hot-mix paving run should be built in which way?

• AAs a tapered, uncompacted feather that traffic will iron out
• BBy leaving a pile of cold mix for the next crew to heat with a torch
• CAs a straight, compacted vertical face that is tacked before the next pull starts
• DBy overlapping 10 feet of loose mix with no saw cut or trim

Per NMDOT 2019 Section 414.3, a cold-milling machine shall control cross-section depth and cross-slope within which tolerance unless the Contract shows otherwise?

• A2 inches, using only the operator’s visual estimate
• B6 inches, measured with a 3-foot carpenter’s level
• CNo tolerance; any milled profile is acceptable
• D1/4 inch, using independent grade control or a 40-foot minimum external reference

A Project Manager sets tack residual at 0.06 gallon per square yard. How many gallons of residual asphalt are required for a 12-foot-wide lane that is 500 feet long?

• A40 gallons
• B4 gallons
• C80 gallons
• D400 gallons

Per NMDOT 2019 Section 411.2, hot-poured crack and joint sealant shall meet which material standard and listing?

• AASTM D 5893 silicone only, with no Approved Products List check
• BASTM D 6690, as specified in the Contract, and be on the Department’s Approved Products L…
• CASTM C 920 polyurethane only, for asphalt cracks
• DAASHTO M 320 performance-graded binder used neat as crack sealant

After chips are rolled into a fresh chip seal, which embedment condition is the usual field target?

• AChips standing on end with almost no binder contact
• BChips fully submerged so only a slick asphalt film is visible
• CAbout one-half to two-thirds of the chip height embedded in the binder after rolling
• DNo rolling, so chips rest loosely on the binder

An open-graded friction course (OGFC) is used on an asphalt pavement primarily to provide which surface function?

• AA dense, impermeable structural base that replaces aggregate base
• BA substitute for tack coat under a dense overlay
• CA full-depth patch mix for failed base repairs
• DA porous wearing surface that drains water, reduces spray, and improves wet-weather frict…

Compared with conventional hot-mix asphalt, warm-mix asphalt is produced and placed at which relative temperature?

• AA substantially lower temperature that still allows coating, compaction, and specified de…
• BA temperature high enough to burn off all the binder
• CAmbient temperature with no heating of the binder
• DOnly temperatures above 400 °F at the paver

Per NMDOT 2019 Section 631, milled rumble strips in new HMA or WMA shall not be started until which condition is met?

• AThe mix is still above 250 °F so the mill teeth cut easily
• BThe mix has cured a minimum of 48 hours after compaction
• CA chip seal has been placed over the fresh mat the same day
• DPermanent pavement markings are already in place on the unsealed grooves