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Maintenance of Surface Areas and Related Structures


Quiz Questions

1.The subgrade is the natural in-place soil under a pavement
True
False
2. Expansive soil expands during the wet, rainy season and shrink during the dry season.
True
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.
True
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.
True
False
5.Which one of the following is part of bituminous pavement structure?
Subgrade
Subbase
Base
Bituminous wearing surface
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
True
False
7.Which one of the followings are principal functions of the wearing surface.
To protect the base from the abrasive effects of traffic
To distribute loads to the underlying layers of pavement structure
To prevent surface water from penetrating into the base and subgrade, and to provide a smooth riding surface for traffic.
All of the above
8.The pavement failure in figure 3-1 is:
Alligator cracks
Bleeding
Block cracking
Sag in Asphalt pavement
Corrugation
Depression
Edge cracking
Transverse reflective crack
Lane shoulder drop off
Transverse crack
Pothole
9.The pavement failure in figure 3-2 is:
Alligator cracks
Bleeding
Block cracking
Sag in Asphalt pavement
Corrugation
Depression
Edge cracking
Transverse reflective crack
Lane shoulder drop off
Transverse crack
Pothole
10.The pavement failure in figure 3-3 is:
Alligator cracks
Bleeding
Block cracking
Sag in Asphalt pavement
Corrugation
Depression
Edge cracking
Transverse reflective crack
Lane shoulder drop off
Transverse crack
Pothole
11.The pavement failure in figure 3-4 is:
Alligator cracks
Bleeding
Block cracking
Sag in Asphalt pavement
Corrugation
Depression
Edge cracking
Transverse reflective crack
Lane shoulder drop off
Transverse crack
Pothole
12.The pavement failure in figure 3-6 is:
Alligator cracks
Spalling
Block cracking
Sag in Asphalt pavement
Corrugation
Depression
Edge cracking
Transverse reflective crack
Lane shoulder drop off
Transverse crack
Pothole
13.The pavement failure in figure 3-8 is:
Alligator cracks
Spalling
Block cracking
Sag in Asphalt pavement
Corrugation
Depression
Edge cracking
Transverse reflective crack
Lane shoulder drop off
Transverse crack
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.
True
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.
True
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.
True
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.
True
False
18.Settlement is a downward movement of a section of the shoulder. The settlement is normally caused by insufficient compaction during construction.
True
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.
Tensile strength across the crack
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.
True
False
21.Preventive maintenance of roads, streets, hardstands, and runways should provide a means to detect early any apparent deterioration of the structure.
True
False