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NM CID GA-1 Practice Questions - New Mexico CID GA-1 Streets, Roads and Highways Examination Exam
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Question
1
of 25
QUESTION 1 / 25
On an NMDOT hot-mix asphalt overlay, what is the primary purpose of a tack coat?
Choose one answer below.
A
To waterproof the existing pavement so water cannot enter the base
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B
To bond the existing surface to the new asphalt course
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C
To rejuvenate oxidized binder in the old pavement
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D
To prime a raw aggregate base before the first asphalt lift
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QUESTION 2 / 25
Per NMDOT 2019 Section 423.3.5.1, the Contractor shall not place hot-mix asphalt on which of the following surfaces?
Choose one answer below.
A
A dry milled asphalt surface that has been tacked
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B
A dry concrete pavement that has been tacked
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C
A wet or frozen surface
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D
A previously placed HMA lift that has cooled overnight
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QUESTION 3 / 25
Per NMDOT 2019 Section 423.3.5.1, HMA may be placed when the Chill Factor is at least which value and rising?
Choose one answer below.
A
32 °F and rising
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B
35 °F and rising
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C
40 °F and rising
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D
50 °F and rising
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QUESTION 4 / 25
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?
Choose one answer below.
A
Chill Factor must still be at least 40 °F
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B
Do not consider the Chill Factor
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C
Add 10 °F to the measured Chill Factor
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D
Paving is prohibited regardless of Chill Factor
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QUESTION 5 / 25
Per NMDOT 2019 Section 423.3.5.2, what may be used to keep HMA from sticking to roller wheels?
Choose one answer below.
A
Diesel fuel sprayed lightly on the drums
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B
Kerosene or other petroleum diluents
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C
Water, or water mixed with a very small quantity of detergent or other approved material
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D
Used motor oil wiped on the drums
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QUESTION 6 / 25
Per NMDOT 2019 Section 407.3.4, the Project Manager sets the tack-coat spray rate to provide what residual asphalt-cement content?
Choose one answer below.
A
0.01 to 0.03 gal per square yard
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B
0.04 to 0.08 gal per square yard
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C
0.15 to 0.25 gal per square yard
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D
0.30 to 0.50 gal per square yard
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QUESTION 7 / 25
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?
Choose one answer below.
A
2 inches
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B
6 inches
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C
12 inches
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D
24 inches
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QUESTION 8 / 25
Per NMDOT 2019 Section 423.3.5.4, where shall the Contractor avoid placing HMA longitudinal joints unless the Project Manager approves otherwise?
Choose one answer below.
A
At the centerline of a two-lane road
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B
In the wheel paths
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C
At the pavement edge next to the shoulder
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D
Over a previously milled surface
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QUESTION 9 / 25
Per NMDOT 2019 Section 423.3.5.4, unless otherwise specified, a transverse HMA joint shall have at least which taper?
Choose one answer below.
A
A 1 ft taper with a slope no steeper than 6:1
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B
A 3 ft taper with a slope no steeper than 24:1
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C
A 10 ft taper with a slope no steeper than 50:1
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D
A vertical butt joint with no taper
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QUESTION 10 / 25
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?
Choose one answer below.
A
24 hours
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B
3 days
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C
7 days
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D
14 days
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QUESTION 11 / 25
Per NMDOT 2019 Section 423.5, Accepted HMA is paid by which pay units?
Choose one answer below.
A
Cubic yard only
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B
Ton or square yard
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C
Gallon of binder only
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D
Linear foot of lane
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QUESTION 12 / 25
Per NMDOT 2019 Section 407.5, Asphalt Material for Tack Coat is paid by the:
Choose one answer below.
A
Gallon at spray temperature
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B
Square yard of tacked surface
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C
Ton
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D
Lump sum
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QUESTION 13 / 25
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?
Choose one answer below.
A
1/2 inch
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B
1 inch
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C
1-1/2 inches
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D
2 inches
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QUESTION 14 / 25
According to the Hot-Mix Asphalt Paving Handbook compaction sequence, where should the breakdown roller operate?
Choose one answer below.
A
Several hundred feet behind the paver after the mat has set
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B
Immediately behind the paver while the mix is still hot and workable
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C
Only after the finish roller has removed the marks
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D
Only on the cold joint after the adjacent lane is placed
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QUESTION 15 / 25
Which bituminous treatment is a light application of diluted emulsion used to seal a weathered asphalt surface, not to bond a new overlay?
Choose one answer below.
A
Tack coat
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B
Prime coat
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C
Fog seal
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D
Chip seal
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QUESTION 16 / 25
Per NMDOT 2019 Section 408, a prime coat is applied to which surface?
Choose one answer below.
A
A newly placed HMA wearing course
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B
A prepared, compacted aggregate base that is slightly moist but not saturated
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C
A wet, frozen subgrade before base placement
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D
An existing HMA pavement immediately before an overlay
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QUESTION 17 / 25
Per Asphalt in Pavement Maintenance (MS-16), interconnected fatigue cracks that form a chicken-wire or alligator pattern usually indicate which condition?
Choose one answer below.
A
Only a surface-texture problem that a fog seal will correct
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B
Structural failure of the asphalt and supporting layers under repeated load
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C
A construction joint that was not tacked
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D
Thermal shrinkage from a single cold night
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QUESTION 18 / 25
A chip seal (bituminous surface treatment) consists of which combination?
Choose one answer below.
A
A thin HMA overlay compacted with a vibratory breakdown roller
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B
An application of asphalt binder followed by a cover of one-sized aggregate that is rolled to seat the chips
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C
A slurry of emulsified asphalt, fine aggregate, and water placed with a spreader box
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D
A light fog of diluted emulsion with no aggregate
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QUESTION 19 / 25
Per NMDOT 2019 Section 424, warm-mix asphalt may be placed when the Chill Factor is at least which value and rising?
Choose one answer below.
A
32 °F and rising
✓
B
35 °F and rising
✓
C
40 °F and rising
✓
D
50 °F and rising
✓
QUESTION 20 / 25
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)?
Choose one answer below.
A
387 tons
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B
704 tons
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C
774 tons
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D
1,548 tons
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QUESTION 21 / 25
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)?
Choose one answer below.
A
183 tons
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B
367 tons
✓
C
550 tons
✓
D
825 tons
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QUESTION 22 / 25
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?
Choose one answer below.
A
1.0 inch
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B
1.4 inches
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C
2.0 inches
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D
2.5 inches
✓
QUESTION 23 / 25
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?
Choose one answer below.
A
0.75 inch
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B
1.0 inch
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C
1.5 inches
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D
3.0 inches
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QUESTION 24 / 25
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)?
Choose one answer below.
A
240 gallons
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B
480 gallons
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C
960 gallons
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D
1,920 gallons
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QUESTION 25 / 25
Under current NMDOT Superpave mix designations, an SM-12.5 surface mix has which nominal maximum aggregate size?
Choose one answer below.
A
9.5 mm (3/8 inch)
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B
12.5 mm (1/2 inch)
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C
19.0 mm (3/4 inch)
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D
25.0 mm (1 inch)
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