Q. What is the purpose of a subgrade in pavement design?
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A.
To provide drainage
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B.
To support the pavement structure
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C.
To enhance aesthetics
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D.
To reduce construction costs
Solution
The subgrade serves as the foundation that supports the pavement structure and distributes loads to the underlying soil.
Correct Answer:
B
— To support the pavement structure
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Q. What is the significance of the California Bearing Ratio (CBR) test?
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A.
To measure asphalt viscosity
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B.
To evaluate soil strength
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C.
To determine concrete compressive strength
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D.
To assess aggregate gradation
Solution
The California Bearing Ratio (CBR) test is used to evaluate the strength of subgrade soil for pavement design.
Correct Answer:
B
— To evaluate soil strength
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Q. Which material is commonly used for the base layer in flexible pavements?
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A.
Asphalt concrete
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B.
Portland cement concrete
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C.
Granular material
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D.
Geotextile fabric
Solution
Granular material is often used for the base layer in flexible pavements to provide support and drainage.
Correct Answer:
C
— Granular material
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Q. Which pavement design method considers traffic loading and environmental conditions?
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A.
AASHTO Design Method
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B.
Empirical Design Method
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C.
Mechanistic-Empirical Design Method
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D.
Layer Coefficient Method
Solution
The Mechanistic-Empirical Design Method incorporates both traffic loading and environmental conditions in its design process.
Correct Answer:
C
— Mechanistic-Empirical Design Method
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Q. Which type of pavement is typically more flexible and can better accommodate temperature changes?
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A.
Rigid pavement
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B.
Flexible pavement
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C.
Composite pavement
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D.
Permeable pavement
Solution
Flexible pavement is designed to be more adaptable to temperature changes and can better accommodate movements.
Correct Answer:
B
— Flexible pavement
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Q. Which type of traffic sign is used to indicate a regulatory requirement?
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A.
Warning sign
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B.
Guide sign
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C.
Regulatory sign
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D.
Information sign
Solution
Regulatory signs are used to indicate laws or regulations that must be followed by road users.
Correct Answer:
C
— Regulatory sign
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