ME 2015
問題一覧
1
The main problem associated with wrong practice of conveying concrete is called:
Segregation
2
The specifications call for a 1:2:4 concrete mix. In a one bagger mixer, which of the following amount of eater is most likely required for the mix?
20 Liters
3
Quality control testing ni the DPWH project is the responsibility of the:
Contractor
4
In performing a grading test on coarse aggregates from Item 311-PCCP, the mass percent passing of the materials for 3" and 21⁄2" sieves is 100%. What is the maximum size of the aggregates?
None of the above
5
2.376
6
What is the minimum soaked CBR value required for the base materials obtained at the maximum dry density determined by AASHTO T180 Method D?
80
7
The minimum moisture content at which soil can be rolled into a thread of 1/8" in diameterminimum moisture content at which soil can be rolled into a thread of 1/8" in diameter without breaking is known as
Plastic Limit
8
The mortar proportion of stone masonry shall be:
One part cement, 2 parts sand
9
Why are undisturbed samples used primarily for determining the properties of foundation materials?
Because it represents the relative of the soil strata when subjected ot compression test
10
Test reports on thirteen (13) concrete beam samples indicate that loading was stopped after reaching the required flexural strength of 550 psi. this practice is:
Improper because test procedure provides that the test should be carried out to failure
11
Universal Testing Machines should be calibrated at least:
Every year
12
Is considered inadequate
13
The selection by a standard method of a representative portion of a material for the purpose of ascertaining its characteristics di called:
Sampling
14
Which of the folowing does not fal under the primary responsibility of hte materials engineer?
Lineal Measurements
15
What other type of cement is allowed to be used from Item 311 and 405 in the absence of Portland cement?
Portland Pozzolan Cement Type 1P
16
A soil compacted dry will reach a certain dry density. If compacted again with the same
compactive effort, but this time with water in the soil, the dry density wil be higher because:
Air is forced out of the soil
17
Emulsified asphalt applied as tack coat prior to laying of bituminous mix is completely cured one it turns to what color?
Black
18
If one of the measurements of a core specimen taken from a concrete pavement is 23.6 cm., what is the corrected measurement to be used in calculating the average thickness of the pavement fi the design thickness is 23.0 cm.?
23.5
19
An Inspection Report can be issued as basis for acceptance for the following except:
Pavement Marking
20
The purpose of conducting laboratory CBR test on the fill materials for embankment is the check:
Bearing capacity of subgrade material
21
When the top surface of a concrete specimen is rough and not truly plane, stress concentrations are introduced and the strength of the concrete si reduced by about:
1/3
22
Per program of work, the estimated volume of Item 201 materials is 6,200 cu.m. How many
compaction tests are required based on the DP WH minimum testing requirements?
4
23
Cutback asphalt or emulsified asphalt is usually used for:
Tack Coating
24
Under what climatic condition(s) do we use the higher penetration grade or soft asphalts?
Cold Climate
25
What will possibly be the result of using different brands of cement in concrete paving?
Different color after it has hardened
26
What is the basis for acceptance or rejection of any construction materials?
Materials reports
27
The index of the retained strength of the compacted bituminous mixtures is the ration of the compressive strength of immersed and dry bituminous mixtures. What is the minimum index of the retained strength required for bituminous mixtures?
70%
28
What is the specification range for asphalt content in a bituminous concrete mix for surface course paving?
5 to 8 percent of the total dry aggregates mass weight
29
Undersized reinforcing steel bars that satisfy the tensile and elongation requirements may be accepted provided that its underweight does not exceed:
6%
30
Which of the following sinot a purpose of the trial sections for subbase construction?
To check the quantity of the subbase materials
31
Which of the following is the frequency of sampling of concrete beams required by DPWH specification?
At least one set of 3 concrete beams every 75 cu.m or fraction thereof
32
Measurement of concrete materials for Item 405 - Structural Concrete shall be by:
Volume
33
What documentation should be maintained and kept updated by the materials engineer during project implementation?
Materials Logbook
34
Aggregates for concrete mixes are classified as either fine or coarse aggregates. Which sieve is
used to separate fine from coarse aggregates?
No. 4 (4.75mm)
35
What is the frequency of core sampling required on the completed bituminous pavement?
Every 100 linear meters per lane
36
According ot the AASHTO Method of Soil Classification, an A-3 material is classified as:
Fine Sand
37
What class of concrete and range of slump will you use in concreting thin reinforced section, railings, precast R.C. piles and cribbing?
Class C with slump 2"-4"
38
When taking three or more samples of aggregates to be combined for one material sample:
The small samples must be obtained from different lots
39
Where do we take additional cores when the measurement of any core taken from the pavement is deficient ni thickness by more than 25 mm?
At no less than 5 meter intervals parallel to the centreline ni each direction from the affected location
40
The Standard Penetration test is an in-situ test That measures:
Depth of soil layer
41
Which of the following bituminous materials is best recommended for sealing weakened plane joints?
Joint Filler Asphalt
42
When Testing cement samples, the lead time required to test them should be considered to
prevent delays in project implementation. How long does it normally take to test cement samples?
28 days
43
Quality of factory-produced reinforced concrete pipes may be best established through:
Test of concrete pipe samples
44
As materials engineer, what is the area of the trial section that you would recommend to check the suitability of the materials and efficiency of the equipment to be used for Item 310, Bituminous Concrete Surface Course?
About 500 sq.m.
45
A well-graded aggregate for base course has proper proportioning of:
Sand-gravel and silty-clay
46
What chemical admixture is needed to produce a concrete mix with improved slump without additional water?
Water reducing admixture
47
In slip-form construction, what is the slump of concrete used?
Almost zero
48
85%
49
A set of three (3) beam samples representing a particular section of the concrete pavement failed to meet the flexural strength requirement. As materials engineer, what would you recommend?
Conduct core test for strength determination on section represented by the failed samples to determine the actual strength of the in-placed concrete
50
For each full day's operation, how many asphalt core samples must be taken for thickness determination?
At least one but not more than three core samples
51
The percentage residue requirement for hydrated lime on A 0.075 mm (no. 200) sieve shall not be more than.
15%
52
The latest state of the Art method in determining density.
Nuclear Densometer
53
If the lab. Density of Bituminous mix is 2.33, what is the degree of compaction of a 5 cm. Asphalt pavement, if the field density obtained is 2.10?
90
54
The Ratio of the weight/mass of the water in the soil to the weight/mass of the dry soil after has been dried to constant weight/mass at atemperature of 110°C +-5.
Moisture content
55
SKID Resistance to asphalt
Texture
56
Density - Voids Analysis
Marshall method
57
The behavior of the soil is influenced by the amount of?
Moisture
58
The transition from plastic to liquid to liquid state?
Liquid limit
59
The moisture content in percent, required to close a distance of 12.5 mm along the bottom of the groove after 25 blows.
Liquid limit
60
The minimum mass of the field samples for coarse aggregate with a minimum nominal size of aggregate of 50mm (no.22") sieve.
100kgs
61
One way of checking the suitability of the materials prior ot the construction of sub-base/base and the efficiency of equipment and construction method.
By having a trial section
62
Surface irregularity for subbase materials measured by a 3-m straight edge.
20mm
63
Which of the following information does not contain in a Job Mix formula?
The amount of mixing water to the aggregates
64
25mm
65
The Clay lumps or shale contain after washing fine aggregate shall not be more than.
1 mass percent
66
Stones, for grouted riprap shall be laid with close, broken joints and shall be firmly bedded into slope and against the adjoining stones, each stone shall be laid.
Each stone shall be laid with each longest axis perpendicular ot the slopes.
67
The Variation of the surface on finished asphalt pavement from the testing edge using 3-m straight edge applied at right angles between contract with the surface shall not exceed.
6mm
68
The speed of the roller for the initial and final compaction shall not exceed.
5kph
69
Filled gabions shall have a minimum density of
1400 kg/m^3
70
Rock gabions shall be generally uniform graded in sizes ranging from?
100mm-200mm
71
Department Order series of 1999 Re-guidelines of the accreditation of contractors and consultant's materials engineers.
D.O. #184
72
Weep holes shall be placed at the lowest points where free outlets for water can be obtained and shall be spread not more than?
2meter center to center
73
The maximum Average deficient thickness per lot of core specimens where 100% payment is recommended?
5mm
74
To non-load bearing concrete masonry shall have a minimum individual compressive strength.
3.45 Mpa
75
Concrete in the area represented by the cores will be considered adequate if the average strength of the cores is equal ot 85% of the specified strength of fc' and no single cope is less than?
75 % f'c
76
Minimum weight of samples for moisture content determination for materials passing 50mm (2") sieve.
1000 grams
77
Soil classification is determined by?
B & C
78
Gabions dimensions are subjected to a tolerance limit on manufactures stated sizes.
+-3%
79
Minimum tensile strength of tendons
270,000 psi
80
Soil can be compacted ot 10 %if?
It is at optimum moisture content
81
In preparing samples of aggregates using quartering method, done on a hard clean and level surface, the reduced size of sample should be taken from?
Two opposite quarter
82
Which of the following are engineering properties of fined grain soils?
All of the above
83
Adequate compaction for sub-base/base will result to?
A & C
84
Which of the engineering properties of the soils does not belong ot the granular soil?
C.) Subject to change in strength & volume due to variation in water content
85
Kind of soils which are susceptible to strength and volume due to change in water content.
Fine-grained soil
86
% of moisture for timber to be seasoned, used ni pile driving.
12-18%
87
Economical way of treating an embankment with weak spot.
Using geotextile
88
The 300mm thick subbase materials should compacted ni how many layers
2 layer
89
The three sores samples has the strength of 3000, 2450 & 260 psi respectively and the required strength is 3,500 psi as a Materials Engineer, What should you recommend?
Not acceptable
90
2.294
91
Indicates the temperature in which the asphalt maybe heated without the danger of catching fire.
Flash point
92
Measure on how much oil (Volatile) is lost is asphalt and also determine on how fat asphalt cement will become harder.
Loss on heating
93
A kind of asphalt formed by natural process of evaporation
Natural or native asphalt
94
A requirement specifying the kind and no. of test prescribed ni each project based on estimated quantities
Minimum testing requirements
95
The amount of sample used to determine CBR test?
20kg
96
Materials finer than 0.075 m can best be separated from larger particles through
Wet sieving
97
Test used to determine the resistance of aggregates to disintegration by saturated solution.
Soundness test
98
What is the basis for the acceptance or rejection of any construction materials
Material tests reports
99
Which of the following are the components of asphalt?
All of the above
問題一覧
1
The main problem associated with wrong practice of conveying concrete is called:
Segregation
2
The specifications call for a 1:2:4 concrete mix. In a one bagger mixer, which of the following amount of eater is most likely required for the mix?
20 Liters
3
Quality control testing ni the DPWH project is the responsibility of the:
Contractor
4
In performing a grading test on coarse aggregates from Item 311-PCCP, the mass percent passing of the materials for 3" and 21⁄2" sieves is 100%. What is the maximum size of the aggregates?
None of the above
5
2.376
6
What is the minimum soaked CBR value required for the base materials obtained at the maximum dry density determined by AASHTO T180 Method D?
80
7
The minimum moisture content at which soil can be rolled into a thread of 1/8" in diameterminimum moisture content at which soil can be rolled into a thread of 1/8" in diameter without breaking is known as
Plastic Limit
8
The mortar proportion of stone masonry shall be:
One part cement, 2 parts sand
9
Why are undisturbed samples used primarily for determining the properties of foundation materials?
Because it represents the relative of the soil strata when subjected ot compression test
10
Test reports on thirteen (13) concrete beam samples indicate that loading was stopped after reaching the required flexural strength of 550 psi. this practice is:
Improper because test procedure provides that the test should be carried out to failure
11
Universal Testing Machines should be calibrated at least:
Every year
12
Is considered inadequate
13
The selection by a standard method of a representative portion of a material for the purpose of ascertaining its characteristics di called:
Sampling
14
Which of the folowing does not fal under the primary responsibility of hte materials engineer?
Lineal Measurements
15
What other type of cement is allowed to be used from Item 311 and 405 in the absence of Portland cement?
Portland Pozzolan Cement Type 1P
16
A soil compacted dry will reach a certain dry density. If compacted again with the same
compactive effort, but this time with water in the soil, the dry density wil be higher because:
Air is forced out of the soil
17
Emulsified asphalt applied as tack coat prior to laying of bituminous mix is completely cured one it turns to what color?
Black
18
If one of the measurements of a core specimen taken from a concrete pavement is 23.6 cm., what is the corrected measurement to be used in calculating the average thickness of the pavement fi the design thickness is 23.0 cm.?
23.5
19
An Inspection Report can be issued as basis for acceptance for the following except:
Pavement Marking
20
The purpose of conducting laboratory CBR test on the fill materials for embankment is the check:
Bearing capacity of subgrade material
21
When the top surface of a concrete specimen is rough and not truly plane, stress concentrations are introduced and the strength of the concrete si reduced by about:
1/3
22
Per program of work, the estimated volume of Item 201 materials is 6,200 cu.m. How many
compaction tests are required based on the DP WH minimum testing requirements?
4
23
Cutback asphalt or emulsified asphalt is usually used for:
Tack Coating
24
Under what climatic condition(s) do we use the higher penetration grade or soft asphalts?
Cold Climate
25
What will possibly be the result of using different brands of cement in concrete paving?
Different color after it has hardened
26
What is the basis for acceptance or rejection of any construction materials?
Materials reports
27
The index of the retained strength of the compacted bituminous mixtures is the ration of the compressive strength of immersed and dry bituminous mixtures. What is the minimum index of the retained strength required for bituminous mixtures?
70%
28
What is the specification range for asphalt content in a bituminous concrete mix for surface course paving?
5 to 8 percent of the total dry aggregates mass weight
29
Undersized reinforcing steel bars that satisfy the tensile and elongation requirements may be accepted provided that its underweight does not exceed:
6%
30
Which of the following sinot a purpose of the trial sections for subbase construction?
To check the quantity of the subbase materials
31
Which of the following is the frequency of sampling of concrete beams required by DPWH specification?
At least one set of 3 concrete beams every 75 cu.m or fraction thereof
32
Measurement of concrete materials for Item 405 - Structural Concrete shall be by:
Volume
33
What documentation should be maintained and kept updated by the materials engineer during project implementation?
Materials Logbook
34
Aggregates for concrete mixes are classified as either fine or coarse aggregates. Which sieve is
used to separate fine from coarse aggregates?
No. 4 (4.75mm)
35
What is the frequency of core sampling required on the completed bituminous pavement?
Every 100 linear meters per lane
36
According ot the AASHTO Method of Soil Classification, an A-3 material is classified as:
Fine Sand
37
What class of concrete and range of slump will you use in concreting thin reinforced section, railings, precast R.C. piles and cribbing?
Class C with slump 2"-4"
38
When taking three or more samples of aggregates to be combined for one material sample:
The small samples must be obtained from different lots
39
Where do we take additional cores when the measurement of any core taken from the pavement is deficient ni thickness by more than 25 mm?
At no less than 5 meter intervals parallel to the centreline ni each direction from the affected location
40
The Standard Penetration test is an in-situ test That measures:
Depth of soil layer
41
Which of the following bituminous materials is best recommended for sealing weakened plane joints?
Joint Filler Asphalt
42
When Testing cement samples, the lead time required to test them should be considered to
prevent delays in project implementation. How long does it normally take to test cement samples?
28 days
43
Quality of factory-produced reinforced concrete pipes may be best established through:
Test of concrete pipe samples
44
As materials engineer, what is the area of the trial section that you would recommend to check the suitability of the materials and efficiency of the equipment to be used for Item 310, Bituminous Concrete Surface Course?
About 500 sq.m.
45
A well-graded aggregate for base course has proper proportioning of:
Sand-gravel and silty-clay
46
What chemical admixture is needed to produce a concrete mix with improved slump without additional water?
Water reducing admixture
47
In slip-form construction, what is the slump of concrete used?
Almost zero
48
85%
49
A set of three (3) beam samples representing a particular section of the concrete pavement failed to meet the flexural strength requirement. As materials engineer, what would you recommend?
Conduct core test for strength determination on section represented by the failed samples to determine the actual strength of the in-placed concrete
50
For each full day's operation, how many asphalt core samples must be taken for thickness determination?
At least one but not more than three core samples
51
The percentage residue requirement for hydrated lime on A 0.075 mm (no. 200) sieve shall not be more than.
15%
52
The latest state of the Art method in determining density.
Nuclear Densometer
53
If the lab. Density of Bituminous mix is 2.33, what is the degree of compaction of a 5 cm. Asphalt pavement, if the field density obtained is 2.10?
90
54
The Ratio of the weight/mass of the water in the soil to the weight/mass of the dry soil after has been dried to constant weight/mass at atemperature of 110°C +-5.
Moisture content
55
SKID Resistance to asphalt
Texture
56
Density - Voids Analysis
Marshall method
57
The behavior of the soil is influenced by the amount of?
Moisture
58
The transition from plastic to liquid to liquid state?
Liquid limit
59
The moisture content in percent, required to close a distance of 12.5 mm along the bottom of the groove after 25 blows.
Liquid limit
60
The minimum mass of the field samples for coarse aggregate with a minimum nominal size of aggregate of 50mm (no.22") sieve.
100kgs
61
One way of checking the suitability of the materials prior ot the construction of sub-base/base and the efficiency of equipment and construction method.
By having a trial section
62
Surface irregularity for subbase materials measured by a 3-m straight edge.
20mm
63
Which of the following information does not contain in a Job Mix formula?
The amount of mixing water to the aggregates
64
25mm
65
The Clay lumps or shale contain after washing fine aggregate shall not be more than.
1 mass percent
66
Stones, for grouted riprap shall be laid with close, broken joints and shall be firmly bedded into slope and against the adjoining stones, each stone shall be laid.
Each stone shall be laid with each longest axis perpendicular ot the slopes.
67
The Variation of the surface on finished asphalt pavement from the testing edge using 3-m straight edge applied at right angles between contract with the surface shall not exceed.
6mm
68
The speed of the roller for the initial and final compaction shall not exceed.
5kph
69
Filled gabions shall have a minimum density of
1400 kg/m^3
70
Rock gabions shall be generally uniform graded in sizes ranging from?
100mm-200mm
71
Department Order series of 1999 Re-guidelines of the accreditation of contractors and consultant's materials engineers.
D.O. #184
72
Weep holes shall be placed at the lowest points where free outlets for water can be obtained and shall be spread not more than?
2meter center to center
73
The maximum Average deficient thickness per lot of core specimens where 100% payment is recommended?
5mm
74
To non-load bearing concrete masonry shall have a minimum individual compressive strength.
3.45 Mpa
75
Concrete in the area represented by the cores will be considered adequate if the average strength of the cores is equal ot 85% of the specified strength of fc' and no single cope is less than?
75 % f'c
76
Minimum weight of samples for moisture content determination for materials passing 50mm (2") sieve.
1000 grams
77
Soil classification is determined by?
B & C
78
Gabions dimensions are subjected to a tolerance limit on manufactures stated sizes.
+-3%
79
Minimum tensile strength of tendons
270,000 psi
80
Soil can be compacted ot 10 %if?
It is at optimum moisture content
81
In preparing samples of aggregates using quartering method, done on a hard clean and level surface, the reduced size of sample should be taken from?
Two opposite quarter
82
Which of the following are engineering properties of fined grain soils?
All of the above
83
Adequate compaction for sub-base/base will result to?
A & C
84
Which of the engineering properties of the soils does not belong ot the granular soil?
C.) Subject to change in strength & volume due to variation in water content
85
Kind of soils which are susceptible to strength and volume due to change in water content.
Fine-grained soil
86
% of moisture for timber to be seasoned, used ni pile driving.
12-18%
87
Economical way of treating an embankment with weak spot.
Using geotextile
88
The 300mm thick subbase materials should compacted ni how many layers
2 layer
89
The three sores samples has the strength of 3000, 2450 & 260 psi respectively and the required strength is 3,500 psi as a Materials Engineer, What should you recommend?
Not acceptable
90
2.294
91
Indicates the temperature in which the asphalt maybe heated without the danger of catching fire.
Flash point
92
Measure on how much oil (Volatile) is lost is asphalt and also determine on how fat asphalt cement will become harder.
Loss on heating
93
A kind of asphalt formed by natural process of evaporation
Natural or native asphalt
94
A requirement specifying the kind and no. of test prescribed ni each project based on estimated quantities
Minimum testing requirements
95
The amount of sample used to determine CBR test?
20kg
96
Materials finer than 0.075 m can best be separated from larger particles through
Wet sieving
97
Test used to determine the resistance of aggregates to disintegration by saturated solution.
Soundness test
98
What is the basis for the acceptance or rejection of any construction materials
Material tests reports
99
Which of the following are the components of asphalt?
All of the above