Q. In the Superpave mix design method, what is the primary purpose of the Gyratory Compactor?
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A.
To determine air voids
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B.
To simulate field compaction
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C.
To measure viscosity
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D.
To assess aggregate gradation
Solution
The primary purpose of the Gyratory Compactor in the Superpave mix design method is to simulate field compaction.
Correct Answer:
B
— To simulate field compaction
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Q. What is the main advantage of using polymer-modified asphalt?
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A.
Lower cost
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B.
Improved elasticity
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C.
Easier application
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D.
Reduced weight
Solution
The main advantage of using polymer-modified asphalt is improved elasticity, which enhances performance under varying temperatures.
Correct Answer:
B
— Improved elasticity
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Q. What is the primary purpose of the California Bearing Ratio (CBR) test?
-
A.
To determine the shear strength of soil
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B.
To assess the load-bearing capacity of subgrade
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C.
To evaluate the moisture content
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D.
To measure the density of asphalt
Solution
The primary purpose of the California Bearing Ratio (CBR) test is to assess the load-bearing capacity of subgrade.
Correct Answer:
B
— To assess the load-bearing capacity of subgrade
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Q. What is the significance of the air void content in asphalt mixtures?
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A.
Affects durability
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B.
Influences temperature susceptibility
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C.
Determines color
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D.
Impacts cost
Solution
The air void content in asphalt mixtures significantly affects durability, as too high or too low can lead to premature failure.
Correct Answer:
A
— Affects durability
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Q. What is the typical design life for a flexible pavement structure?
-
A.
5 years
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B.
10 years
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C.
20 years
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D.
30 years
Solution
The typical design life for a flexible pavement structure is 20 years.
Correct Answer:
C
— 20 years
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Q. What is the typical range of the Marshall stability value for asphalt mixtures?
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A.
50-100 lb
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B.
100-150 lb
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C.
150-200 lb
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D.
200-250 lb
Solution
The typical range of the Marshall stability value for asphalt mixtures is 100-150 lb.
Correct Answer:
B
— 100-150 lb
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Q. Which of the following is NOT a component of asphalt concrete?
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A.
Aggregate
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B.
Asphalt binder
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C.
Water
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D.
Additives
Solution
Water is NOT a component of asphalt concrete; it is primarily composed of aggregate, asphalt binder, and additives.
Correct Answer:
C
— Water
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Q. Which pavement design method uses the AASHTO equation for structural design?
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A.
Superpave
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B.
Marshall
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C.
AASHTO 1993
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D.
Empirical
Solution
The AASHTO 1993 method uses the AASHTO equation for structural design of pavements.
Correct Answer:
C
— AASHTO 1993
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Q. Which test is commonly used to evaluate the resistance of asphalt mixtures to moisture damage?
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A.
Marshall Test
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B.
Indirect Tensile Test
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C.
Lottman Test
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D.
Dynamic Modulus Test
Solution
The Lottman Test is commonly used to evaluate the resistance of asphalt mixtures to moisture damage.
Correct Answer:
C
— Lottman Test
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