Materials Engineer Test Reviewer

Materials Engineer Test Reviewer

1.Scales for weighing aggregates and cement shall be accurate within ____ % throughout the range of use. Scales shall be inspected and sealed asoften as the Engineer may deem necessary to assure their continuedaccuracy.

a) 1.0 %b) 1.5 % c) 0.5 %d) 2.0 % 2. When cement is placed in contact with the aggregate, batches may berejected unless mixed within _____ hours of such contact.

a) 1.5 hoursb) 2.0 hoursc) 0.5 hours d) 2.5 hours

3.When mixed at the site or in a central mixing plant, the mixing time shallnot be less than ______ nor more than ____ unless mixer performance testprove adequate mixing of concrete in a shorter time period.

a) 30 seconds nor more than 90 secondsb) 50 seconds nor more than 90 secondsc) 60 seconds nor more than 120 secondsd) 90 seconds nor more than 120 seconds

4. The flow of water shall be uniform and all water should be in the drum bythe end of the first ____ seconds of the mixing period.

a) 45 secondsb) 30 secondsc) 15 secondsd) 20 seconds

5.Concrete not place within ____ minutes from the time the ingredientswere charged into the mixing drum shall be used.

a) 120 minutes b) 150 minutesc) 60 minutesd) 90 minutes

6.When concrete is delivered in truck mixers, additional water may beadded to the batch and additional mixing performed to increase the slumpto meet the specified requirement if permitted by the Engineer, provided allthese operation are performed within ____ after the initial mixing operationand the water and cement ratio is not exceeded.

a) 30 minutesb) 15 minutesc) 45 minutesd) 60 minutes

7.A sample from a bituminous mix weighs 1000 grams. Atextraction, it was found out that the dry aggregate weighed 950grams. What is the % of asphalt by weight of mix?

a) 5.2 %b) 5.0 %c) 5.4 %d) 4.8%

8. The minimum penetration of the preservative with the surface of the timber piles shall be ____

a) 150 mm b)200 mmc) 250 mmd) 100 mm

9. The contractor shall submit in writing a job-mix formula for themixture supported by laboratory test data along with samples of resources of components and viscosity – temperature relationships tothe Engineer for testing and approval at least ____.

a) two weeks b) three weeksc) one weekd) four weeks

10. The concrete samples should be stored in a moist conditionedtemperature within the range of ____ until the time of test.

a )18* C to 24* Cb) 15* C to 18* Cc) 14* C to 24* Cd) 18* C to 28* C

11.This is used in soil stabilized road surface due to its high ____ property, that is, it absorb and retain water.

a) Potassium Chloride b) Calcium Chloridec)Magnesium Chloride

d) Sodium Chloride

12.The mass % wear of soil aggregate used in cement/limeproportions should not be more than ____

a) 40 % b) 50 %c)45 %d) 55 %

13.The uniform rate at which the movable head of the CBR machine travelis _____ .

a) 0.05 in/ min b) 0.10 in /minc) 0.08 in /mind) 0.09 in /min

14.Cast in place concrete shall not be post – tensioned until at least ____ and until the compressive strength has reached the strength specified.

a) 7 days b) 10 daysc) 14 daysd) 20 days

15. The penetration test is an indication of the ____ of asphalt.

a) Consistencyb) Softnessc) Hardness d) Flash Point

16.Specification requires one (1) Quality test for every ____ of asphalt

a) 20 tonsb) 200 tons c) 50 tonsd) 40 tons

17.The ____ is the most commonly used method in the design andevaluation of bituminous concrete mixes.a) Job mix formulab) Design mixc) Marshall Stabilityd) Extraction

18.Vibration shall operate a frequency of 8,300 to 9,600 impulses perminute under load at a maximum spacing of ____ cm.

a) 30 cmb) 50 cmc) 60 cmd) 40 cm

19.The specific gravity of Sodium Sulfate used in soundness test foraggregate should be with in the range of ____.

a)1.151 to 1.174b) 1.250 to 1.178c) 1.051 to 1.154 d) 1.058 to 1.184

20. The specific gravity magnesium sulfate solution used insoundness test for aggregate should be within the range of ____ .

a) 1.280 to 1.408 b) 1.180 to 1.308c) 1.295 to 1.308d) 1.195 to 1.318

21.Aggregate accounts for 92 – 95 % of the weight of the bituminousmixture asphalt accounts for 5 – 8 % of the weight of the mix. Theexact percentage to be used is determined by the _____

a) Trial mixb) Design mixc) Job mix d) Job order

22._____ is an indication that the asphalt mix is overheated.

a) Blue smokeb) Stiff appearancec) Rising steam d) Mix slumps in truck

23.In checking the temperature of the mix, the thermometershould be inserted into the mix at least ____.

a) 2 inches b) 6 inchesc) 4 inches d) 6.0 mm

24. _____ is applied on existing bit, or cement concrete surface withbituminous materials.

a) Bituminous Prime Coat b) Bituminous Tack Coat

c) Bituminous Seal Coatd) Bituminous Surface Treatment

25. The solution used in the soundness test of aggregate shall becooled to a temperature of 21 +or – 1* C and maintain at thattemperature for at least _____.

a) 24 hours b) 36 hoursc) 48 hoursd)18 hours

26.Proper compaction of the fill materials is very important, as it will ______.

a) Increase the shear strengthb) Decrease permeabilityc) Minimize compressibilityd) All of the above

27.In which DPWH item is emulsified asphalt not suitable?

a) Item 301b) Item302c) Item 304 d) Item 308

28.Unconfined compressive strength test is usually performed on______.

a) Sandy soils b) Silty soilsc)Organic soils d) Clayey soils

29.Consolidation test is usually performed on ____ samples

a) Disturbed b) Undisturbedc) Consolidated d) both a & b

30.A concrete core sample having a maximum height of less than_____ of its diameter before capping or height less than its diameterafter capping shall not be tested.

a) 93 %b) 94 %c) 95 % d) 96 %

31.The cohesion and internal friction of soil is tested by

a) Tri axial shear test b) Direct shear testc) Bearing test d) All of the above

32.In concrete acceptance, core will be considered adequate if the averagestrength of the cores is equal to what?

a) 80% of specified strength & if no single core is less than 75% of specifiedstrength b) 90% of specified strength & if no single core is lessthan 80% of specified strengthc) 85% of specified strength& if no single core is less than 75% of specified strength

33.Before the cement is to be used, sampling must be done at least _____ before use.

a) one week b) 14 daysc) two weeks d) 12 days

34.Asphalt cement shall not be used while it is foaming nor shall beheated at ____ at anytime after delivery.

a) 107* b) 159*c) 120*

35.Moisture content of aggregate in bit mix shall not exceed ____ of the time it is introduce into the mixing unit.

a) 1.5 mass % b) 2.0 mass %c) 1 mass %

36.Batching tolerance for Sand and Aggregate is ____.

a) 1 %b) 2 %c) 3 %

37.Between stage of curing, concrete shall not be exposed for morethan how many hours?

a) 24 hoursb)3 hoursc)½ hour d) 72 hours

38.As a Materials Engineer, what will you do with majorhoneycombed area that is considered as defective work?

a) Plasterb) Payment of the concrete will be made an adjustmentc) Removed and replaced at the expensed of the contractor

39.If the strength of control specimen does not meet therequirement and not feasible to obtain cores due to structuralconsideration, as a Materials Engineer what will be your decision?

a) Removed and replacedb) Area will not be paidc) Payment will be made at an adjusted price

40.After concrete has been placed, it is advisable to maintain fully weltedand in position for how many hours?a) 14 hours b) 24 hoursc)72 hoursd) 15 – 18 hours

41.Rock shall be excavated to a depth ____ below sub grade within the limitof the roadbed

a) 100mm b)150 mmc) 200 mm

42.Minimum penetration of all piles shall be ____.

a) 3 meterb) 6 meterc) 7 meter d) 4.5 meter

43.Piles shall not be driven within 7 meters of concrete less than _____ old.

a) 7 daysb) 14 dayc) 28 days

44.Paint contains _____ of pigment and _____ vehicle.

a) 20 % & 80 % b) 21 % & 79 %c) 79 % & 21 %d) 80 % & 20 %

45.Minimum thickness of bedding materials beneath the pipe is _____.

a) 100 mmb) 150 mmc) 200 mm

46. Tolerance of gabion dimension is _________________.

a) +/- 1%b) +/- 2 %c) +/- 3 %d) +/- 4

47.Minimum size of galvanized wire mesh is ____________.

a) 2.0 mm b)2.2 mmc) 2.7 mmd) 3.4 mm

48.Minimum density of gabions is ___________.

a) 1,000 kg/cu. m b) 1,200 kg/cu. mc)1,400 kg/cu. md) 1,500 kg/cu. m

49.Soundness loss of field gabions is __________________.

a) 9 % after 5 cyclesb) 10 % after 5 cyclesc) 11 % after 5 cycles d) 12 % after 5 cycles

50.The heating temperature of reflector zed thermoplastic materialduring application is _____

a) 130 +/- 7* C b) 150 +/- 7* Cc) 200 +/- 7* C d) 211 +/- 7* C

51.Submission of sample minimum quantity of material for asphaltcement is -------.

a) 5 kg b) 10 kg c) 20 kgd) 100 kg

52.For how many years does the small Contractor given to procurenecessary testing equipment?

a) 2 years b) 4 yearsc) 5 yearsd) 6 years

53. The depth of the weakened joints must not be less than ____ anda width of ___.

a) 40 mm & 6 mm b) 50 mm & 5 mmc) 40 mm & 5 mm d)50 mm & 6 mm

54.Used of bituminous cold mix for potholes patching during rainy/wet period is acceptable

a) false b) true

Materials Engineer

1.In soil Engineering the term “SOIL” includesa.clay b.gravelc.sandd.all of the preceding

2.The compressibility of a fine grained soil isa.high b.lowc.it depends upon the grain size

3.Sand has a greater load-carrying capacity than claya.true b.falsec.it depends on gradationd.it depends on water content

4.The highest moisture content in the plastic consistency of fine-grained soil is theliquid limita.plastic limit b.shrinkage limit

5.Compaction increases the strength of soil bya.expelling air from its voids b.forcing soil particles into more intimate contactc.both a and b

6.Indicates a range of moisture content over which soil is plastica.plastic limit b.shrinkage limitc.plasticity index

7.Water content of an undisturbed soil is calleda.optimum moisture content b.hygroscopic moisture contentc.natural water content

8.In the performance of Moisture Density Relations Test, the equipment used isa.liquid limit device b.sand-cone apparatusc.rammer and moldd.none of the above

9.Peat and muck area.fair subgrade soils b.stable soilsc.unstable soils

d.good subgrade soils

10.The particle size distribution of a soil is determined bya.liquid limit test b.sieve analysis testc.plastic limit testd.any of the preceding

11.To prevent intrustion of soft subgrade material into the aggregate base or subbasea.reinforced earth b.rock buttressc.gabionsd.geotextile may be used

12.The CBR value is generally selected ata.0.10 b.0.0375c.0.05d.0.20 penetration

13.One of the methods in improving the properties of a soil to make it suitable for a particular purposeisa.particle rearrangement b.sodding or spriggingc.pavingd.none of the preceding

14.A sample of saturated clay has a mass of 102.8 g. After oven drying, the same soil weighs 73.4 g. If the specific gravity is 2.74, its wet density, g/ml isa.1.829 b.1.825c.1.827d.1.83015.The dry density, g/ml isa.1.310 b.1.306c.1.300d.1.309

16.Blown Asphalt are usually used for pavinga.true b.falsec.it depends upon its ductility

17.A mixture of asphalt cement and water with emulsifying agent is calleda.R. C. cutback b.M. C. cutback c.Asphalt emulsiond.Oxidized asphalt18.The a) Marshall Stability Test b) Immersion-Compression Test c) Job-Mix formula

compares thecompressive strength of dry and wet specimens of asphalt mixes.

19.The effective asphalt content is a) lower than b) higher than c) equal to the actual asphalt content.

20.Which of the following percent air voids is most preferable in bituminous mixturea.0% b.5%c.8%

21.a) Viscocity b) solubility c) Flash point d) Extraction test determines the bitumen content of asphaltcement

22.a) Distillation b) Penetration c) Viscocity d) Ductility is the consistency test on solid asphalt.

23. a) Tack coat b) Prime coat c) Seal coat is the bituminous coating applied to an old concrete pavement to be used as base.

24. A Job-mix formula provides for close control of a.asphalt content b.aggregate gradationc.both a and b

25.a) Flexibility b) Durability c) Stability d) Workability is the resistance of an asphalt pavementagainst weathering.

26.The temperature of hot mixes being delivered should not be less than itsa.mixing b.applicationc.heatingd.compaction temperature

27.A Bituminous Seal Coat is usually applied with aggregatea.true

b.falsec.it depends on the surface application

28. The maximum specific gravity of an asphalt mix containing 6.0% asphalt by weight of mix is 2.6.If the specific gravity of an asphalt is 1.01, the specific gravity of the aggregate is equal toa.2.65 b.2.56c.2.76d.2.70

29.The weight in air of a core specimen taken from asphalt pavement is 4,128 g. If its SSD weight is4,137 g. and its weight in water is 2,237 g. Therefore, its bulk density isa.2.42 b.1.72c.2.28d.2.69

30.The bulk specific gravity of a sample of bituminous pavement taken from a newly rolled section is2.244. If the laboratory compacted specific gravity is 2.362 and the minimum compactionrequirement is 95%, the pavement isa.satisfactorily rolled b.over compactedc.in need of more rolling

31.Concrete specimen molded in a 6” x 6” x 21” beam mold should be roddeda.60 b.61c.62d.63 times

32.Quality determination of concrete coarse aggregate sample requiresa.abrasion test b.sieve analysisc.stabilityd.both a and b

33.Concrete fine aggregate should be tested for a.compactionb.strippingc.stabilityd.none of the preceding

34.Admixtures are used toa.improve workability b.increase strengthc.retard initial settingd.all of the preceding

35.a) Compressive strength b) Flexural strength c) Bond d) All of the preceding will improve if water – cement ratio is lowered.

36.Angular coarse aggregate will require morea.sandb.water c.both a and bd.coarse aggregate per unit volume of concrete.

37.Slump test could be used to detecta.increase in cement content b.increase in water c.increase in volumed.increase in aggregate

38.Greatest net water is required in a concrete mix witha.very coarse b.coarsec.fined.very fine, fine aggregate

39.If the concrete beam specimen is raptured during test outside the middle third, but within 5% of thespan length, the formula to be used in computing the stress isa.R = PL/bd2b.R = 3Pa/bd2c.R = Pla/bd240.Concrete mix should be in placia.100 min b.90 min c.15 min, after the cement is added into the aggregates and water.

41.The fineness modulus is highest fora.coarseb.very coarsec.fined.very fine, sand.

42.In molding concrete cylinder specimen, each layer should be roddeda.25 b.56c.60d.100 times.

43.Concrete cylinder sample should be molded ina.1 b.2c.3

d.4 equal layers

44.Maintaining the water-cement ratio, the concrete containinga.50.0 mm b.37.5 mmc.19.0 mmd.12.5 mm maximum size aggregate will develop the highest strength.

45.Paving concrete will need lessa.sand b.water c.coarse aggregated.both a & b, than that of structural concrete.

46.The maximum percentage of abrasion loss allowed for concrete coarse aggregate isa.40 b.45c.50

47.For Bituminous Concrete Surface Course, if asphalt cement is used, the percentage based on theweight of aggregate should bea.3 to 5% b.5 to 8%c.6 to 10%

48.An aggregate base course of 21,600 m3 will requirea.14 b.15c.72 quality tests

.49.Coarse aggregate for Crushed Stone Aggregate Surface Course should have not less thana.40 b.45c.50d.60 with at least one fractured face

50.Crushed Gravel Base Course, Grading C, shall be compacted in layers of not more thana.10 cm b.15 cmc.20 cm loose thickness.

51.An embankment to be constructed to a height of 65 cm will have a minimum of a.4 b.5c.6 layers.

52.To give Bituminous Plant Mix Base Course greater to resistance to water a.½ to 1%

b.1 ½ to 2%c.2 – 3% hydrated lime should be added during mixing.

53.The type of Bituminous Macadam Pavement isa.asphalt cementb.asphalt emulsionc.rock asphaltd.either a or b.

54.Prestressed Concrete Structures use concrete classa.A b.Bc.Cd.D

55.a) 5 b) 9 c) 3 pipes should be taken as sample to represent 225 reinforced concrete pipes.

56.Before placing the asphalt pavement, the gravel base course should bea.seal coated b.tack coatedc.prime coated

57.Concrete used in reinforced concrete culvert pipe should generally have a compressive strength of aa.16.54 Mpa ( 2400) b.27.56 Mpa ( 4000)c.20.67 Mpa ( 3000)d.34.45 Mpa ( 5000)

58.Concrete railings, pipes, and piles require the use of what class of concrete?a.A b.Bc.Cd.D

59.Steel bars for concrete reinforcement is tested for itsa.tensile b.compressionc.bendingd.both a and c for properties.

60.Aggregate Base Course with a volume of 112,000m3 will have a minimum number of a.74 b.75c.56d.374 quality tests.

61.Which plasticity index is most suitable for aggregate base course?a.5b.10c.15d.50 The fraction passing the 0.425 mm (No.40) shall have a liquid limit not greater than 25 and plasticity index not greater than 6.

62.The specified flexural strength for paving concrete isa.350 b.400c.525d.300

63.The sample of 12.5 mm diameter steel bar to be submitted for test should be at leasta.20 cm b.40 cmc.100 cmd.none of the above

64. a) Third point loading b) Three-edge bearing test c) Mid-span loadingd) none of the aboveis themethod used in determining the strength of concrete pipes.

65 Prestressed concrete requires the use of Classa.A b.Bc.Cd.D concrete

66.If an asphalt pavement will be constructed over an old existing concrete pavementa.prime coatb.tack coatc.seal coatd.mortar coat should be applied to the concrete pavement.

67.For bituminous concrete mixes, the asphalt material may either be asphalt cement or asphaltemulsiona.trueb.false68.Coarse Aggregate for Bituminous Macadam Pavement should bea.crushed gravel or stoneb.natural gravelc.both a and bd.none of the above

69/70. Tests for coarse aggregate includea.abrasion

b.mortar strength c.absorptiond.all of the preceding

71/72. Tests for fine aggregate for concrete includea.gradationb.mortar strengthc.abrasiond.all of the preceding

73.Unless otherwise specified in the special provision, the type of portland cement used in pavingconcrete shall bea.Type Ib.Type IIc.Type IIId.Type IV

74.During construction of a road project, if all the materials to be used are tested for quality, inspectionis no longer requireda.trueb.false

75.The degree of compaction of an embankment in our present Specifications is based ona.CBR method b.Unconfined compression testc.AASHTO Designation T-180d.Bulk Specific Gravity

76/77. Under Excavation for Structure, Item 106, the backfilling operation shall be done in20 cmlooselayer and compacted to at least95 Percent.

78.Soils are natural aggregates of minerals connected by strong and permanent cohesive forcesa.trueb.false

79.The boundary between sand and gravel isa.0.425 mm (#40) b.4.750 mm (#4)c.2.00 mm (#10)d.0.075 mm (#200)

80.Aa) sandy clayb) clayey sand c) sand clay

d) none of the preceding is a soil which exhibits the properties of a clay but contains an appreciable amount of sand.

81.Plasticity test is done on soils passinga.0.425 mm (#40)b.2.00 mm (#10)c.0.075 mm (#200) sieve.

82.a) Soil compactionb) mechanical analysis c) In-place unit weight d) CBR is the process wherebysoil particles are contained more closely together through a reduction in the air voids, generally bymechanical means.

83.Soils containing more than 35% passing 0.075mm (#200) sieve are classified under a.silt-clay materials b.granular materials c.it depends on the plasticity index

84.a) Surface drainage b) chemical admixtures c) compactiond) subsoil drainage is provided for the purpose of counteracting moisture movement within the structure either by seepage or capillaryaction.

85.A subgrade soil with a CBR value of a) 5% b) 15% c) 30%d) 3% will require a thicker layer of subbase and base course.

86.a) Particle arrangement b) sodding or sprigging c) paving d) flattening is one of the methods of stabilizing inferior soils.

87.The physical and engineering properties of soils may be improved bya.compaction b.stabilizationc.both a and bd.neither a nor b.

88.Water content of soils is generally based on thea.total weight of soil b.total volume of soilc.weight of solidsd.none of the preceding

89.The density to which a soil can be compacted is related toa.compactive efforts b.water contentc.both a and bd.none of the preceding

90.Disturbed samples may be used for a.sieve test b.liquid limitc.compaction testd.any of the preceding

91.A soil with a Group Index of 5 is stronger than another with a Group Index of 10a.trueb.falsec.it depends on the water content

92. a) Water content b) void ratioc) degree of saturationd) porosity determines the relative amount of water in the voids.

93.a) Rock asphaltb) Asphalt emulsion c) asphalt cement d) cutback asphalt is an asphalt formed by natural process of evaporation.

94. Uncrushed aggregates are preferable than crushed aggregates for bituminous mixturesa.true b.falsec.it depends on the type of bituminous material

95. The apparatus used in determining the consistency of liquid asphalt is thea.flowmeter b.viscometerc.penetrometer d.pycnometer

96.a) Solidb) liquidc) Blown d) hot asphalt is preferable for bituminous prime coat.

97.a) Distillationb) Extraction c) Penetration d) Solubility is the test used in determining amount of asphalt cement in a liquid asphalt.

98.a) Asphalt cement

b) cut-back asphaltc) asphalt mixesd) asphalt emulsion are usually tested for extraction.

99.Extraction test is the procedure used for separatinga.the asphalt from water in emulsified asphaltb.asphalt from mineral aggregatesc.asphalt from kerosene solventd.asphalt from gasoline solvent

100. The optimum asphalt content obtained in a Marshall Stability test is the average of the asphalt contentof the Maximum Stability, Maximum density anda.Maximum flow b.Maximum air voidsc.4% air voidsd.4% flow

101.a) VMAb) Air voids c) Permeable voids are intergranular void spaces between aggregate particles.

102. The main difference between a bulk measured specific gravity of a bituminous mixtures and itsmaximum measured specific gravity is thea.weight of the voids b.weight of the asphaltc.volume of the voidsd.volume of the aggregates

103.a) Asphalt cementb) emulsified asphalt c) Rapid curing d) medium curing cut-back is the best type of asphalt to be used for hot mixes.

104.A bituminous coating applied in an existing road prior to laying of a bituminous surface overlay isa. prime coatb tack coatd.seal coat

105.The distance traveled by a standard penetration needle on a prepared sample of asphalt under conditions for normal penetration is 8.6 mm. The material isa.40 – 50b.85 – 100c.120 – 150d.200 – 300 penetration grade

106.The maximum specific gravity of an asphalt mix containing 6.0% asphalt by weight of mix is 2.5.if the specific gravity of the asphalt is 1.01, the specific gravity of the aggregate is equal toa.2.65 b.2.56

c.2.76d.2.70

107.A job-mix formula provides for close control of a.aggregate gradation b.asphalt contentc.both of themd.neither of them

108.The desired property of fresh concrete isa.strength b.durabilityc.workabilityd.water tightness

109.The sieve used in the separation of aggregates after the abrasion test isa.1.70mm ( No. 12 )b.0.425mm ( No. 40 )c.4.75mm ( No. 4 )d.0.075mm ( No. 200 )

110. Normally, concrete mix witha) 0.75b) 0.35 c) 0.50 d) 0.45 water-cement ratio will develop thelowest strength.

111. The most important single factor which affects the quality of concrete isa.cement content b.aggregate gradationc.water-cement ratiod.aggregate quality

112. Paving concrete will need lessa.sand b.water c.coarse aggregated.both a and b than that of structure concrete.

113.Concrete specimen molded in a 6”x6”x21” beam should be roddeda.60 b.61c.62d.63114. Quality determination of concrete coarse aggregate sample requiresa.abrasion test b.sieve analysisc.stability

d.both a and b

115. Concrete mix should be in placea.100 minute b.120c.15d.90 after the cement is added into the aggregate and water.

116. Concrete beam specimens for paving concrete are molded ina.2 equal layersb.3 equal layersc.4 equal layersd.any of the preceding

117. A minimum cement factor of a.7.5b.8.5c.9.5d.10.0 bags/cubic meter of concrete is required for paving concrete (Based on the 94 lbs. Bag of cement)

118. The volume of thea.concreteb.cementc.air d.all of the preceding can be calculated by performing the unit weight test on the fresh concrete.

119. The used of manufactured fine aggregate will generally require morea.mixing waterb.fine aggregatec.coarse aggregated.both a and b.

120. The two (2) major components of concrete area.paste and mineral aggregatesb.cement and water c.water and coarse aggregates

121. The coarser the fine aggregate, the higher the fineness modulusa.yesb.noc.depends on grading test

122. The more the concrete is exposed, the greater the range of movement isa.trueb.falsec.it depends upon the type of cement123. The samples of RSB to be submitted for test should be at leasta.20 cm b.40 cmc.100 cm

124. The efficient compaction, the embankment material should at the time of rolling bea.dry b.wetc.at optimum moisture content

125. a) 15,000 kgb) 10,000 kgc) 5,000kg of 12.5mm diameter steel bar for concrete reinforcement isthe maximum quantity that a sample can represent.

126 a)Rock asphaltb) asphalt emulsion c) Asphalt cement d) Cut-back asphalt is anasphalt formed by natural process of evaporation.

127.Uncrushed aggregates are preferable than crushed aggregates for bituminous mixturesa.trueb.falsec.it depends on the type of bituminous material.

128.The apparatus used in determining the consistency of liquid asphalt is thea.flowmeter b.viscometerc.penetrometer d.pycnometer

129. a) Solidb) liquidc) blown d) hot asphalt is preferable for bituminous prime coat.

130.a) Distillationb) Extraction c) Penetration d) solubility is the test used in determining the amount of asphalt cement in a liquid asphalt.

131. a) Asphalt cement b) Cut-back asphaltc)Asphalt mixesd) Asphalt emulsion areusually tested for extraction.

132.Extraction test is the procedure used for separatinga.the asphalt from water in emulsified asphaltb.asphalt from mineral aggregatesc.asphalt from gasoline solventd.asphalt from kerosene solvent.

133.a) Distillation b) Viscosityc) Flash pointd) Softening point indicated the safe workingtemperature of the asphalt.

134.The optimum asphalt content obtained in a Marshall Stability Test is the average of the asphaltcontent of the Maximum stability, maximum density anda.maximum flow b.maximum air voidsc.4% air voidsd.45 flow

135.a) VMAb) Air voids c) Permeable voids are intergranular void spaces between aggregate particles.

136.a) Asphalt cementb) Emulsified asphalt c) rapid curing cut-back d) medium curing cut- back is the best type of asphalt to be used for hot mixes.

137.The field density of a bituminous pavement shall not be less thana.92 %b.95 %c.98 % of the specific gravity of the laboratory compacted specimen.

138.For ITEM 311 PCC pavement, coarse aggregate shall have a mass percent of wear not exceedinga.50 %b.40 %c.45 %d.60 % when tested by AASHTO T- 96.

139.Plasticity Index for Aggregate Surface Course isa.not greater than 6 b.not greater than 25c.4 to 9d.12.

140.At least one (1) set of 3 concrete cylinder samples shall be taken froma.50b.75c.100d.150 cubic meter of each class of concrete or fraction thereof, placed each day.

141.Fine aggregates used in concrete pavement shall contain not more thana.1.5b.3c.4

d.1 percent of material passing the 0.075mm sieve by washing.

142.The degree of compaction required for embankment is at leasta.100 b.90c.95d.85 percent of the maximum density as determined by AASHTO T-90 Method.

143.Requirement of PCCP Constructiona.opening to traffic after 14 days the concrete was placedb.opening to traffic after 28 days the concrete was placedc.a compressive strength of 25.08 Mpa or mored.none of the above.

144.Roadway embankment in earth material shall be placed and compacted in horizontal layers notexcedinga.150 mmb.200 mmc.100 mmd.250 mm loose requirement, before the next layer is placed.

145.Steel bars for concrete reinforced is tested for itsa.tensile b.compressivec.yieldd.both a and c.

146.To give Bituminous Concrete Surface Course greater resistance to water a.2 - 3 % b.1 ½ - 2 %c.½ - 1 %d.4 – 5 % hydrated lime should be added.

147.In Aggregate Subbase Course, the degree of compaction of each layer shall continue until a fielddensity of at leasta.100b.95c.90 percent of the maximum dry density determined in accordance with AASHTO T-180,Method D has been attained.

148.The maximum percentage wear allowed for Aggregate Subbase Course in a coarse portion retainedon a 2.00mm (No. 10) sieve isa.45b.50c.40d.55 percent by Los Angeles Abrasion Test determined by AASHTO T-96.

149.In manufacture of culvert pipes, the class of concrete used is

a.Class “C”b.Class “B”c.Class “A”d.Class “P”

150.For Bituminous Concrete Surface Course, if Asphalt cement is used, the percentage based on theweight of aggregate should bea.3 to 5 %b.5 to 8 %c.6 to 10 %d.4.5 to 8 %

151.Coarse aggregate for Crushed stone Aggregate Surface Course should have a mass percent of notmore thana.40 % b.45 %c.60 %d.50 % of the particle retained on the 4.75mm (No.4) sieve and shall have at least one (1)fractured face.

152.Before placing the asphalt pavement, the gravel base course should bea.seal coated b.tack coatedc.prime coated

153.Prestressed Concrete structures uses concrete of classa.A b.Bc.Cd.P

154.An aggregate base course of 21,600m3 will requirea.14b.25c.72 ?d.40

155.An embankment to be constructed to a height of 600mm will have a minimum number of a.4 b.5c.3d.6 layers.

156.Aggregate base course with a volume of 112,000 m3 will have a minimum number of a.74b.75c.56d.62 quality tests.

157.A portland cement concrete pavement, 6.5m wide and 23 cm. thick will be constructed for a total paved area of 165,000 m3. Angular coarse aggregate will be used. If pavement will be opened totraffic 14 days.a.how many bags of cement will be required for Class “A” concrete?b.How many quality tests are required for the cement?c.How many quality and grading tests each are required for the coarse and fine aggregates?d.How many sets of concrete beam samples will be required?Vconcrete = 165000 x 0.23 = 37,950 m3a. cement = 37950 x 9.1 = 345,345 bags b. QT of cement = 345,345/2000 = 173c.VFA = 37950 x 0.54 = 20493 ; QFA = 20493/1500 = 14 ; GFA = 20493/75 = 274VCA = 37950 x .68 = 25,886 ; QCA = 25806/1500 = 18 ; GCA = 25806/75 = 345d.37950/75 = 506 sets

158.Per our present Specifications for Highways and Bridges, including amendments, it is mandatiry toopen PCCP to traffic not later thana.14 days after pouringb.21 days after pouringc.7 days after pouringd.28 days after pouring

159.For 850 m3 of concrete paved in one daya.3b.2c.1 sets of concrete beam samples should be taken and tested for strength (thickness of pavement= 0.23 m).

160.For 4050 m3 concrete coarse aggregatea.6 b.5c.3d.4 samples should be submitted for quality tests.

161.The coarse aggregate of Item 201, Aggregate Base Course shall have a percentage of wear of notmore thana.40 % b.45 %c.50 %d.60 % as determined by Los Angeles Rattler Test.

162.The rate of application of emulsified asphalt used as bituminous prime coat isa.0.5 to 1.0 literb.1.0 to 1.5 liter c.1.5 to 2.0 liter per square meter.163.Steel bars for concrete reinforcement is tested for itsa.tensile b.compressionc.bending

d.both a and c properties.

164.For 250 gallons of Red Lead Painta.1 b.2c.3 samples should be submitted for quality test.

165.The number of samples of structural steel (reduced section) required for 38,000 kg. Isa.1 b.2c.3

166.a.) Third - point loading b.) mid – span loading c.)three – edge bearing is the method used in determining the strength of concrete pipes.

167.An aggregate base course of 23750 m3 will requirea.50 b.20c.16 quality tests.

168.The Plasticity Index of aggregate base course should not be greater thana.12b.6c.10d.8

169.Concrete Hollow Blocks are tested for itsa.compression b.absorption and dimensionc.tensiled.both a and b.

170.Item 306 is calleda.Bituminous Surface Treatment b.Bituminous Road Mix Surface Coursec.Bituminous Plant Mix (Stockpile Maintenance mixture)d.Bituminous Penetration Macadam Pavement

171.In the preparation of an asphalt design mix intended for Item 310, the proportion of bituminousmaterial (asphalt cement) on the basis of total dry aggregates shall be from:a.4 to 8 % b.3 to 5 %c.5 to 7 %d.5 to 8 %

172.Item -------- includes general requirements that are applicable to all types of bituminous plant mixsurface courses irrespective of gradation of aggregates or kind and amount of bituminous material.

a.Item 306b.Item 307c.Item 308d.Item 310

173.---------- is the result of asphalt layer instability or granular base or subgrade weakness. The pavement usually twist out of shape.a.disintegration b.upheavalc.distortiond.bleeding

174. ---------- the localized upward displacement if a pavement due to swelling of the subgrade or some portion of the pavement structure.a.upheavalb.edge crackingc.ravelingd.depression

175 Item ---------- consist of furnishing and placing one or more courses of graded aggregatesand one or more application of bituminous material followed by a seal coat with cover aggregatesconstructed in a prepare base is:a.303 b.304c.305d.306

176.An asphalt cement submitted in the laboratory for quality test should always have acorrespondinga.Job mix formulab.Test reportc.Sample cardd.Minimum testing requirements

177.If an asphalt pavement will be constructed over an old existing concrete pavement, ----------should be applied to the pavement.a.tack coatb.prime coatc.seal coatd.mortar coat

178.The amount of emulsified asphalt to be added in a Bituminous Plant-Mix Surface Course, ColdLaid (Item 308) shall be ------------ mass percent, total dry aggregate basis:a.4 to 8 b.5 to 10 NOTE: If MC is used the proportion of bituminous material on the basis of c.6 to 10total dry aggregate shall be from 4.5 to 7.0 %.d.7 to 12

179.------------ test is measure by the distance to which it will elongate before breaking when two (2)ends of a briquet with specimen are pulled apart at a specified speed and temperature.a.penetration b.solubilityc.ductilityd.viscosity180.Another name for hot asphalt is -----------a.bituminous asphaltb.asphalt cementc.emulsified asphaltd.blown asphalt

181.In cutback asphalt, medium curing type is a combination of the followinga.asphalt cement and road oilsb.asphalt cement and kerosenec.asphalt cement and gasolined.asphalt cement and emulsifier

182.------------ test determines the amount of asphalt present in a bituminous mixa.distillationb.extractionc.solubilityd.compression

183.The softness and hardness of an asphaltic material can be determined by -------- test.a.softening point b.loss on heatingc.penetrationd.distillation

184. The temperature of bituminous hot mix delivered in the project site should not be less than its -------temperature.a.mixingb.compactionc.moldingd.spreading

184.Resistance to deformation of bituminous mixture is measured by -----------a.flow indexb.index of retained strengthc.ductility testd.extraction test

185.The apparatus used in determining the grade of asphalt cement is:a.hydrometer b.penetromanometer c.petronmeter d.penetrometer

186.In an Immersion-Compression test, molding of specimen is done into ------- layer/s.a.1b.2c.3 NOTE: In Marshall Stability, molding of specimen is done intod.4 one (1) layer.

187.The actual cementing power in asphalt is called the ------------a.petrolene b.asphaltenec.bitumend.resin

188.------------- test indicates the temperature in which an asphalt cement may be heated without thedanger of catching fire. It is used as criterion in eliminating fire hazards.a.softening pointb.flash pointc.laser pointd.heating point

189.An asphalt pavement needs sufficient -------- to avoid flushing or bleeding.a.compactionb.air voidsc.binder d.mineral filler

190.A job – mix formula provides for close control of:a.asphalt content b.aggregate gradationc.temperature of asphalt, aggregate and mixd.all of the above

191.The thinnest and most fluid grade of medium curing cutback asphalt is:a.MC – 800 b.MC – 250c.MC – 70 NOTE: For MC, the higher the grade the thicker d.MC – 30

192.The amount of asphalt in a typical asphalt emulsion is:a.40 % b.50 % NOTE: After distillation the amount of asphalt (residual) retained shouldc.60 %at Least 60 %.d.70 %

193.Another name for joint filler is:a.asphalt cement b.cutback asphaltc.mineral filler

d.blown asphalt

194.The type of asphaltic material that is usually classified by its viscosity is:a.liquid asphaltb.blown asphaltc.rock asphaltd.lake asphalt

195.Item 310, Bituminous Surface Course, Hot Laid provides an air voids between:a.3 – 5 %b.5 – 7 %c.5 – 8 %d.8 – 10 %

196.Emulsified asphalt that has a positive charge particle is usually classified:a.anionicb.cationicc.pozzolanicd.ultrasonic

197.The characteristics of a bituminous mix that indicates resistance to disintegration is called:a.stability b.flexibilityc.durabilityd.integrity

198.The coarse aggregates used in bituminous mix are those retained at sieve No.a.8b.10c.30d.200

199.---------- test compares the compressive strength of dry and wet specimen of bituminous mixa.marshall stabilityb.immersion-compressionc.extractiond.bulk specific gravity

200.In item 310, bituminous Surface Course, Hot laid requires 70% minimum index of retainedstrength (IRS). In the immersion-compression test, the dry stability is about 900 psi. Based onthe data, the wet stability should be at least ------- psia.270 b.630 Wet stabilityc.1286 NOTE: IRS = ----------------- X 100d. 1500 Dry stability201.A compacted bituminous pavement shall have a minimum density of equal to or greater than –a.85 % b.90 % NOTE: The compacted pavement shall have a density equal to, or greater than 95

c.95 % mass percent of the density of a laboratory specimend.100 %

202.The rate of application of emulsified asphalt used as tack coat, should be within the range of a.0.2 – 0.5 liter/ m2 b.0.2 – 0.7 NOTE: The rate of application of either the Rapid Curing or thec.0.15 – 0.7 Emulsified asphalt shall be within the range of 0.2 to 0.7d.1.0 – 2.0 liter/m2, the exact rate as determined by the Engineer.

203.The type of asphaltic material that is being referred to by penetration grade is:a.emulsified asphalt b.cutback asphaltc.asphalt cementd.mastic asphalt

204.The optimum asphalt content obtained in a marshall stability test is the average of the asphaltcontent of maximum stability, maximum density anda.minimum flow index b.maximum VMAc.4 % or designed air voidsd.maximum VFA

205.The service performance of an asphalt pavement is greatly influenced by:a.grade of asphaltb.quantity of asphaltc.a and bd.none of the above

206.In bituminous mixture, aggregates account for 92 % to 95 % of the weight of the mixture, whileasphalt ( the binder of the aggregates ) accounts for ---------------a.3 – 5 % b.5 – 8 % NOTE: The proportion of bituminous material on the basis of totalc.5 – 10 % dry aggregate, shall be from 5.0 to 8.0 mass percent.d.7 – 10 %

207.In asphalt pavement, prior to acceptance, a sample of full depth, 150mm x 150mm or 100mmdiameter shall be taken by a saw or core drill for -------- testa.thickness determination b.densityc.stabilityd.a and b

208.In an asphalt pavement construction, after spreading bituminous mix, compaction will followwhere rolling shall begin at the sides and proceed longitudinally parallel toward the roadcenterline, each trip overlapping ------- of the roller width, gradually progressing to the crown of the roada.½b.1c.1 ½

d.2.0

209.The control of temperature during the mixing and compaction is of great significance in the ----of the resulting pavementa.strength b.skid resistancec.flexibilityd.all of the above

210.based on the minimum testing requirements for Item 309, Bituminous Plant Mix, General, onequality test for asphaltic material requires for every ------ tonnes or fraction thereof.a.40b.50c.60d.70

211.The test in emulsified asphalt which determines the resistance of the emulsion to break whenmixed with mineral aggregatesa.solubility b.sieve testc.cement mixingd.storage stability

212.What Item in the DPWH standards and specification is Bituminous Tack Coat?a.301b.302c.303d.304

213.In identifying project location intended for asphalt pavement, which of the following criteria isnot appropriate to recommend?a.drainage facilities is well-maintained b.location is not a typhoon belt areac.existing base course is stabled.flood-prone section

214.An asphalt cement can be a good bituminous binder material for Item:a.301 b.302c.308d.310

215.Which of the following bituminous material is best recommended for sealing weakened planeand construction joints of the PCCP.a.asphalt cement b.emulsified asphaltc.cutback asphaltd.joint filler asphalt

216.The primary quality control mechanism for the production of asphalt mixtures which will have ahigh degree of uniformity that will satisfy job requirements is called:a.marshall stability testb.job mix formulac.immersion – compression stability testd.a and b

217.When a completed asphalt pavement exhibits too much voids, it is usually caused by thefollowing except of:a.rolling the mixture below the temperature requirements b.too much coarse aggregatesc.too little binder d.too much fine aggregates

218.Test results from specimen taken from a recently rolled asphalt pavement showed that its totalasphalt content is 5.45 % by weight of mix. If the asphalt absorbed by the aggregate is 0.95 %,the effective asphalt content by weight of mix is:a.4.8 % Pba b.4.552 % NOTE: Pbe = ----- x Psc.5.10 % 100d.5.50 % Where: Pbe = effective asphalt content, percent by total weight of mixturePba = absorbed asphalt, percent by weight of aggregatePb = asphalt content, percent by total weight of mixturePs = aggregate content, percent by total weight of mixture

219.An asphalt mix prepared in the laboratory used 30 %, 50 %, 20 % by weight of coarse aggregate(CA), fine aggregate (FA) and mineral filler (MF), respectively. If the specific gravity of CA, FA, and MF are 2.50, 2.65 and 2.50, respectively, the overall specific gravity of compositeaggregates is:a.2.58 30 + 50 + 20 b.2.45 SG oa = ---------------------------------c.2.66 30/2.5 + 50/2.65 + 20/2.5d.2.77

220.If 95 % of the aggregates in question no. 45 is mixed with 5 % asphalt by weight of mix, thespecific gravity of the mix(if it is voidless) is:specific gravity of asphalt is 1.01.a.2.45 b.2.23 100c.2.39 Gmm = Gmb = -------------------------d.2.18

( voidless) 95/2.58 + 5/1.01

221.If the bituminous mix in No.46 has a 5 % air voids, the bulk specific gravity (Gmb) can becomputed as:a.2.51 Gmm - Gmb b.2.27 % Air Voids = ----------------- x 100c.2.39 Gmm

d. 2.41 2.39 - Gmb5/100 = ------------------2.39

222.If the dry stability of a bituminous mix is 3,950 lbs. And its wet stability is 2,830 lbs., the Indexof Retained Strength (IRS) is:a.50.20 % b.71.60 % Wet Stabilityc.73.20 % IRS = ----------------- x 100d.61.10 % Dry Stability

223.The voids in the mineral aggregate (VMA) is:a.the sum of the air voids and the volume of the mixb.the difference between the volume of the mix and the volume of aggregatec.the sum of the air voids and volume of aggregated.the difference between the volume of mix and volume of asphalt

224.The distance travelled by a standard penetration needle on a prepared sample of asphalt cementunder condition for normal penetration is 9.0 mm ( the penetration scale has 1/10 mmcalibration). Asphalt cement is classified as --------- penetration grade.a.60 – 70b.85 – 100c.120 – 150d.200 – 300