問題一覧
1
What is the dividing line between coarse and fine aggregates¿
2.00mm sleeve
2
The depth of the weakened plain joints Should be at all time not less than:
50mm
3
Serves as load transfer device and are held in position parallel to the surface and center line of the slab by a metal device:
Reinforcing Bar
4
The depth of corrugation the surface pavement after brooming.
1.5mm
5
The width of the weakened plain joints should not be more than:
6mm
6
The flexural strength of the concrete beam sample at 14 days when tested at third point method is:
3.8 Mpa
7
What is the weight of class “A” Riprap stones:
min. of 15kg to a max. of 25kg with at least 50% weighing 20kg
8
The proportion mix of mortar for grouted riprap shall be:
one part of cement to 3 parts of sand
9
The practice of artificially densifying and incorporating definite density into the soil mass rolling, tampering or other means:
Compaction
10
The unit pressure greater than which progressive settlement will occurs leading o failure:
Bearing Capacity
11
Specified or selected materials of designed thickness place as foundation at pavement.
Base
12
The materials in excavation (cuts), embankment (fills) and embankment foundation immediate below the layer of subbase, base, or pavement and to such depth as may affect the structural design:
Sub-grade materials
13
Specified or selected materials of designed thickness place as foundation for base:
Sub-base
14
A widely used as control test in embankment construction to ensure adequate compaction:
Field Density Test
15
Sand used to measure the volume of test hole in the field density test;
Calibrated sand
16
What item number is Portland Cement Concrete Pavement:
Item 311
17
What are the essential laboratory test for soil classification¿
Grading plastic and liquid limit test
18
Provided along the slopes of high embankments as an erosion control measure and to measure and to improve the stability of the side slopes:
Berm
19
What is the oven drying temperature for moisture content determination ¿
110*C +/- 5
20
What is the air drying temperature ¿
not to exceed 60*C
21
The primary quality control mechanism for the production of asphalt mixtures which will have a high degree of uniformity that will satisfy the job requirements is called:
Job-Mix-Fomula
22
The most commonly used method in the design and evaluation of bituminous concrete mixes.
Marshall Stability Method
23
The most common method in determining the consistency of concrete mix:
Slump test
24
A department memorandum circular, a revised method on Field Density Test;
DM No.48
25
Interconnected cracks forming a series of small blocks resembling an alligator’s skin or chicken wire is called:
Alligator cracks
26
A layer of an asphalt aggregate mixture of variable thickness used to eliminate irregularities in the content of an existing surface prior to placement of an overlay:
Asphalt leveling course
27
An application of low-viscosity cutback to an absorbent surface of a mixed-in application of emulsified asphalt, it is used only on untreated base prior to placement of an asphalt pavement.
Asphalt prime coat
28
A thin asphalt surface treatment used to waterproof and improve the texture of an asphalt wearing surface:
Asphalt surface treatment
29
The upward movement of an asphalt in an asphalt pavement resulting in the formation of a film of asphalt on the surface:
Bleeding Flushing Asphalt
30
An application of asphalt materials to any type of road or pavement surface with or without a cover of mineral aggregates that produce an increase in thickness of less than 25mm or 1inch,
Asphalt surface treatment
31
The localized buckling or shattering of a rigid type pavement occurring usually at traverse crack or joint.
Blow up
32
A very light application of asphalt applied to an existing asphalt or Portland cement surface , used to ensure a bond between the surface of being paved and the overlaying course :
Asphalt Tack Coat
33
A mixture of slow setting emulsified asphalt, water, aggregates and mineral filler produce to a slurry consistency and placed on pavement surface:
Asphalt emulsion slurry seal
34
The separation of the pavement due to natural causes, traffic actin or reflections from an underlying pavement:
cracks
35
The bowl-shape holes of varying sizes in the pavement, resulting from localized disintegration:
potholes
36
A crack in asphalt overlay that reflects the crack pattern in the pavement structure underneath:
reflective cracks
37
The progressive separation of aggregate particles in a pavement from the surface downward or from the edge inward:
raveling
38
A crack sometimes crescent shaped, that point in the direction of the trust of the wheels on the pavement surface caused by lack of bond between two pavement layer:
slippage cracks
39
Any condition that might contribute to making a pavement slippery:
skid hazard
40
The uniform rate of flow of concrete when poured:
15 to 20 cubic meter per hour
41
Test used to determine the hardness property of course aggregates:
abrasion test
42
Used to evaluate the potential strength of soil aggregate:
CBR
43
Test which gives an indication of clay content soil :
Plasticity Index
44
The soaked CBR value for item 200(subbase) at maximum dry density is:
not less than 25%
45
The soaked CBR value for item 201(base course) at maximum dry density is:
not more than 80%
46
The mass percent of wear of course aggregates for base materials by Los Angeles Abrasion Test:
not more than 50%
47
The stones used for stone masonry shall have a thickness of not less than:
150mm
48
The rate of loading for compressive strength:
20-50 psi/sec
49
The temperature for moist curing of specimen that gives the best result.
15.5*C to 37.5*C
50
The maximum size to coarse aggregates required for item 311(PCCP):
2 1/2 inches (63mm)
51
A program quality control works to be complied by the contractor which is prepared by DPWH:
Quality Control Program
52
It is prescribed in each project based on estimated quantities and specifies the kind and number of test for each item of work.
Minimum Testing Requirements
53
Memorandum Circular No.___ hereby directed that all materials men in charge in a said project keep a logbook on Materials Quality Control.
MC #80
54
A Department Order, hereby directed that only test report issued by the Regional or District laboratories of the Department and other testing laboratories accredited by the DPWH shall be allowed to be used in the acceptance or rejection of construction materials.
DO #135
55
A Department Order, hereby directed, No acceptance and final payment shall be made on completed concrete and asphalt pavement unless core test for thickness determination is conducted.
DO #119
56
A number of measurements for concrete core specimen:
9
57
A number of measurements for asphalt core specimen:
4
58
A test that covers the quantitative determination of bitumen in hot mixed paving mixtures and pavement samples for specification acceptance, service evaluation, control and research:
Extraction test
59
The permitted variances in design requirements of aggregate Subbase materials on surface irregularity measured by a 3meters straight edge:
20mm
60
The permitted variation in design requirements of aggregate Base materials on crossfall or camber:
+/- 0.2%
61
If the required thickness for Subbase or base is 150mm or less, this maybe spread and compacted in ____.
1 layer
62
The in-place density (tested by AASHTO T-191) of each layer should consistently:
at least 95% of the MDD
63
The maximum sieve opening for grading requirement of aggregate base course (item 201).
50mm
64
The bituminous Prime Coat materials should be applied by a pressure distributor at specified temperature and at an application rate ranging from:
1.0-2.0 L/sq.m
65
The rate of application for bituminous tack coat materials (item 302) ranging from:
0.2-0.7 li/sq.m
66
The plasticity index for mineral filler used for Hot Plant Mix Bituminous Pavement:
Not greater than 4
67
The gradation requirement used for Hot Plant-Mix Bituminous Pavement:
Grading D
68
The placing temperature for bituminous mixture measured in the truck prior to dumping.
at least 107*C
69
How many samples or core- drilled samples must be taken for each day’s full operation ¿
at least one, but not more than 3
70
Unsuitable materials are soils with liquid limit exceeding:
80
71
Unsuitable materials are soil with a natural water content exceeding:
100
72
Materials containing detrimental quantities of organic material such as grass, roots and sewerage, highly organic soils such as peat and muck:
unsuitable materials
73
The fraction passing the 0.425mm (No.40) sieve for item 200-Aggregate Subbase Course shall have a liquid limit of:
Not greater than 35
74
The fraction passing the 0.425mm (No.40) sieve for item 104- Embankment shall have a liquid limit:
Not greater than 30
75
The fraction passing the 0.425mm (No.40) sieve for item 201- Aggregate Base Course shall have a liquid limit of:
Not greater than 25
76
The fraction passing the 0.425mm (No. 40) sieve for item 202 shall have a liquid limit of as determined by AASHTO T-89:
Not greater than 25
77
The fraction passing the 0.425 (No.40) sieve for item 200- Aggregate Subbase Course shall have a plasticity index of:
Not greater than 12
78
The fraction passing the 0.425mm (No.40) sieve for item 201-Aggregate Base Course shall have a Plasticity index of:
Not greater than 6
79
The fraction passing the 0.425mm (No.40) sieve for item 202 shall have a Plasticity index of:
Not greater than 6
80
The coarse portion, retained on a 2.00mm (#10) sieves for item 201 shall have a madd percent of wear by the Los Angeles Abrasion Tests as determined by AASHTO-T96.
Not exceeding 50
81
The coarse portion, retained on a 2.00 mm(#10) sieves for item 201 shall have a mass percent wear by the Los Angeles Abrasion Tests:
Not exceeding 50
82
The materials passing the 19mm sieves for item 202 shall have a soaked CBR value tested according to AASHTO-T93.
25% minimum
83
The materials passing the 19mm sieves for item 201 shall have a soaked CBR value tested according to AASHTO-T193
80% minimum
84
The materials passing the 19mm sieves for item 202 shall have a soaked CBR value of:
80% minimum
85
The coarse portion, retained on a 2.00mm (#10) sieves for item 202 shall have a mass percent of wear by the Los Angeles Abrasion Tests:
Not exceeding 4
86
How many core samples should be taken for thickness determination of a 2-kilometer, 2-lane concrete road pavement ¿
20
87
To avoid hitting a waterfall, realignment of the route must be done. Being a new road that will pass through loose of heterogeneous strata,auger borings should be made on the proposed alignment at an average interval of:
250mm
88
What is the single vertical datum to which elevation for all infrastructure projects should be referred to¿
Mean sea level
89
Clay can be distinguished from “silt” by performing:
Plastic limit test
90
The Atterberg limit tests are performed on the soil fraction passing sieve No.:
40 (0.425mm)
91
How open progress payment be requested by a contractor ¿
Once a month
92
Whose engineering judgment will prevail in the overall field implementation of a project ¿
Project Engineer
93
A variation order may be in the form of extra work order o change order. What is the maximum allowable percentage of the change order ¿
10%
94
The progress of maintaining sufficient moisture and favorable temperature in concrete is called:
Curing
95
The flexural strength of concrete is considered satisfactory when the average strength of all sets of 3 consecutive strength test results equal or exceed the specified strength and when no individual strength test result is deficient by more than:
15% of 550 psi
96
Before an asphalt pavement or asphalt surface treatment is place on a granular base, what is liquid asphalt is applied ¿
Prime coat
97
Sub- grade soil is well compacted under the controlled condition of:
Optimum moisture content
98
Camber on gravel roads is provided to:
Prevent water from stagnating on the carriageway
99
The rate of application of emulsified asphalt used as Tack Coat, should be within the range of:
0.2-0.5 L/m2
100
The compaction of sub-base, the compacted dry density of each layer should not be less than what value of the maximum dry density,determine according to the AASHTO method ¿
100%