| 1. |
The subgrade is the natural in-place soil under a pavement |
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True |
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False |
| 2. |
Expansive soil expands during the wet, rainy season and shrink during the dry season. |
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True |
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False |
| 3. |
Expansive soil gives trouble where construction is accomplished during the dry season and the soils absorb moisture during the subsequent wet season. Conversely, problem arises when the construction is finished during the wet season and the soils lose moisture during the subsequent dry season. |
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True |
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False |
| 4. |
Subbase and base course layers containing gravel and soil-binder material are compacted with steel-wheel and rubber-tired vibratory compactors. Equipment and methods are adjusted on each job to suite the characteristics of the material. |
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True |
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False |
| 5. |
Which one of the following is part of bituminous pavement structure? |
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Subgrade |
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Subbase |
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Base |
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Bituminous wearing surface |
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All of the above |
| 6. |
The wearing surface is the upper most layer of the pavement structure. In a flexible pavement, it is a mixture of bituminous binder material and aggregate |
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True |
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False |
| 7. |
Which one of the followings are principal functions of the wearing surface. |
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To protect the base from the abrasive effects of traffic |
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To distribute loads to the underlying layers of pavement structure |
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To prevent surface water from penetrating into the base and subgrade, and to provide a smooth riding surface for traffic. |
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All of the above |
| 8. |
The pavement failure in figure 3-1 is: |
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Alligator cracks |
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Bleeding |
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Block cracking |
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Sag in Asphalt pavement |
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Corrugation |
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Depression |
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Edge cracking |
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Transverse reflective crack |
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Lane shoulder drop off |
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Transverse crack |
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Pothole |
| 9. |
The pavement failure in figure 3-2 is: |
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Alligator cracks |
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Bleeding |
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Block cracking |
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Sag in Asphalt pavement |
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Corrugation |
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Depression |
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Edge cracking |
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Transverse reflective crack |
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Lane shoulder drop off |
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Transverse crack |
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Pothole |
| 10. |
The pavement failure in figure 3-3 is: |
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Alligator cracks |
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Bleeding |
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Block cracking |
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Sag in Asphalt pavement |
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Corrugation |
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Depression |
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Edge cracking |
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Transverse reflective crack |
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Lane shoulder drop off |
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Transverse crack |
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Pothole |
| 11. |
The pavement failure in figure 3-4 is: |
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Alligator cracks |
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Bleeding |
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Block cracking |
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Sag in Asphalt pavement |
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Corrugation |
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Depression |
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Edge cracking |
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Transverse reflective crack |
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Lane shoulder drop off |
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Transverse crack |
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Pothole |
| 12. |
The pavement failure in figure 3-6 is: |
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Alligator cracks |
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Spalling |
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Block cracking |
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Sag in Asphalt pavement |
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Corrugation |
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Depression |
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Edge cracking |
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Transverse reflective crack |
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Lane shoulder drop off |
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Transverse crack |
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Pothole |
| 13. |
The pavement failure in figure 3-8 is: |
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Alligator cracks |
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Spalling |
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Block cracking |
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Sag in Asphalt pavement |
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Corrugation |
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Depression |
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Edge cracking |
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Transverse reflective crack |
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Lane shoulder drop off |
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Transverse crack |
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Pothole |
| 14. |
Typical Slippage crack shown in fig. 3-18 is caused by low strength surface mix or alack of bond between the surface layer and the course beneath. |
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True |
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False |
| 15. |
Swell is the localized upward displacement of a pavement due to the upheaval of the subgrade or some portion of the pavement structure. Swell or frost heave is commonly caused by expansion of freezing water in the lower courses of the pavement structure or subgrade. |
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True |
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False |
| 16. |
Raveling is a progressive separation of the aggregate from the binder (fig 3-15). Raveling is the failure of bond between the aggregate and the bituminous binder. Raveling may be caused by insufficient compaction during the construction. |
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True |
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False |
| 17. |
Normal maintenance and repair of concrete pavements consists principally of the care of joints, sealing of cracks, replacement of random broken slabs or similar sections, and the correction of minor settlement and drainage faults. |
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True |
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False |
| 18. |
Settlement is a downward movement of a section of the shoulder. The settlement is normally caused by insufficient compaction during construction. |
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True |
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False |
| 19. |
Tests have shown that the most effective sealant is a 1:1 volume mixture of boiled linseed oil in Kerosene. This should be applied in two coats: the first at a rate of 400 square feet per gallon, the second at 600 square feet per gallon. T e sealant should not be applied to wet concrete. |
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Tensile strength across the crack |
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Compressive strength across the crack |
| 20. |
Rejuvenators are products that can be applied to asphalt pavement to modify the asphalt properties to approximately those of new asphalt. |
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True |
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False |
| 21. |
Preventive maintenance of roads, streets, hardstands, and runways should provide a means to detect early any apparent deterioration of the structure. |
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True |
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False |
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