Materials Engineer

1. In soil Engineering the term “SOIL” includesa. clayb. 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. trueb. falsec. it depends on gradationd. it depends on water content

4. The highest moisture content in the plastic consistency of fine-grained soil is thea. liquid limitb. plastic limitc. shrinkage limit

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

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

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

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

9. Peat and muck area. fair subgrade soils b. stable soilsc. unstable soilsd. 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 earthb. rock buttressc. gabionsd. geotextile may be used

12. The CBR value is generally selected ata. 0.10b. 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 purpose isa. 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. 1.829b. 1.825c. 1.827d. 1.830

15. The dry density, g/ml isa. 1.310b. 1.306c. 1.300d. 1.309

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

17. A mixture of asphalt cement and water with emulsifying agent is called a. R. C. cutbackb. M. C. cutbackc. Asphalt emulsiond. Oxidized asphalt

18. The a) Marshall Stability Test b) Immersion-Compression Test c) Job-Mix formula compares the compressive 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 asphalt cement

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 ofa. asphalt contentb. aggregate gradationc. both a and b

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

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

27. A Bituminous Seal Coat is usually applied with aggregatea. trueb. 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. 2.65b. 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 is 4,137 g. and its weight in water is 2,237 g. Therefore, its bulk density is a. 2.42b. 1.72c. 2.28d. 2.69

30. The bulk specific gravity of a sample of bituminous pavement taken from a newly rolled section is 2.244. If the laboratory compacted specific gravity is 2.362 and the minimum compaction requirement is 95%, the pavement is a. satisfactorily rolledb. over compactedc. in need of more rolling

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

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

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

34. Admixtures are used toa. improve workabilityb. 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. waterc. both a and bd. coarse aggregate per unit volume of concrete.

37. Slump test could be used to detecta. increase in cement contentb. increase in waterc. increase in volumed. increase in aggregate

38. Greatest net water is required in a concrete mix witha. very coarseb. coarsec. fine d. very fine, fine aggregate

39. If the concrete beam specimen is raptured during test outside the middle third, but within 5% of the span length, the formula to be used in computing the stress isa. R = PL/bd2

b. R = 3Pa/bd2

c. R = Pla/bd2

40. Concrete mix should be in placia. 100 minb. 90 minc. 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. 25b. 56c. 60d. 100 times.

43. Concrete cylinder sample should be molded ina. 1b. 2c. 3d. 4 equal layers.

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

45. Paving concrete will need lessa. sandb. waterc. coarse aggregated. both a & b, than that of structural concrete.

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

47. For Bituminous Concrete Surface Course, if asphalt cement is used, the percentage based on the weight 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. 14b. 15c. 72 quality tests.

49. Coarse aggregate for Crushed Stone Aggregate Surface Course should have not less thana. 40b. 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 cmb. 15 cmc. 20 cm loose thickness.

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

52. To give Bituminous Plant Mix Base Course greater to resistance to watera. 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. Ab. 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 coatedb. 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. Ab. Bc. Cd. D

59. Steel bars for concrete reinforcement is tested for its a. tensileb. compressionc. bendingd. both a and c for properties.

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

61. Which plasticity index is most suitable for aggregate base course?a. 5 b. 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. 350b. 400c. 525 d. 300

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

64. a) Third point loading b) Three-edge bearing test c) Mid-span loading d) none of the above is the method used in determining the strength of concrete pipes.

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

66. If an asphalt pavement will be constructed over an old existing concrete pavementa. prime coatb. tack coat c. 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 asphalt emulsiona. true b. false

68. Coarse Aggregate for Bituminous Macadam Pavement should bea. crushed gravel or stone b. natural gravelc. both a and bd. none of the above

69/70. Tests for coarse aggregate includea. abrasion b. mortar strengthc. absorption d. all of the preceding

71/72. Tests for fine aggregate for concrete includea. gradation b. mortar strength c. abrasion d. all of the preceding

73. Unless otherwise specified in the special provision, the type of portland cement used in paving concrete shall bea. Type I b. Type IIc. Type IIId. Type IV

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

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

76/77. Under Excavation for Structure, Item 106, the backfilling operation shall be done in 20 cm loose layer and compacted to at least 95 Percent.

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

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

80. A a) sandy clay b) 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 passing a. 0.425 mm (#40) b. 2.00 mm (#10)c. 0.075 mm (#200) sieve.

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

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

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

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. compactionb. stabilizationc. both a and b d. neither a nor b.

88. Water content of soils is generally based on the a. total weight of soilb. total volume of soilc. weight of solids d. none of the preceding

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

90. Disturbed samples may be used fora. sieve testb. 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. true b. falsec. it depends on the water content

92. a) Water content b) void ratio c) degree of saturation d) porosity determines the relative amount of water in the voids.

93 a) Rock asphalt b) 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 mixtures a. trueb. falsec. it depends on the type of bituminous material

95. The apparatus used in determining the consistency of liquid asphalt is thea. flowmeterb. viscometer c. penetrometerd. pycnometer

96. a) Solid b) liquid c) Blown d) hot asphalt is preferable for bituminous prime coat.

97. a) Distillation b) 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 asphalt c) asphalt mixes d) 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 aggregates c. 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 content of the Maximum Stability, Maximum density and a. Maximum flowb. Maximum air voidsc. 4% air voids d. 4% flow

101. a) VMA b) 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 its maximum measured specific gravity is the a. weight of the voidsb. weight of the asphaltc. volume of the voids d. volume of the aggregates

103. a) Asphalt cement b) 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 is a. prime coat

b 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 is

a. 40 – 50b. 85 – 100 c. 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 to

a. 2.65b. 2.56c. 2.76 d. 2.70

107. A job-mix formula provides for close control ofa. aggregate gradationb. asphalt contentc. both of them d. neither of them

108. The desired property of fresh concrete isa. strengthb. durabilityc. workability d. 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 with a) 0.75 b) 0.35 c) 0.50 d) 0.45 water-cement ratio will develop the lowest strength.

111. The most important single factor which affects the quality of concrete isa. cement contentb. aggregate gradationc. water-cement ratio d. aggregate quality

112. Paving concrete will need lessa. sandb. 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. 60b. 61c. 62d. 63

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

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

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

117. A minimum cement factor of a. 7.5b. 8.5 c. 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. concrete b. cementc. aird. 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 water b. fine aggregatec. coarse aggregated. both a and b.

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

121. The coarser the fine aggregate, the higher the fineness modulus a. yes b. noc. depends on grading test

122. The more the concrete is exposed, the greater the range of movement isa. true b. falsec. it depends upon the type of cement

123. The samples of RSB to be submitted for test should be at leasta. 20 cmb. 40 cmc. 100 cm

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

125. a) 15,000 kg b) 10,000 kg c) 5,000kg of 12.5mm diameter steel bar for concrete reinforcement is the maximum quantity that a sample can represent.

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

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

128. The apparatus used in determining the consistency of liquid asphalt is the a. flowmeterb. viscometer c. penetrometerd. pycnometer

129. a) Solid b) liquid c) blown d) hot asphalt is preferable for bituminous prime coat.

130. a) Distillation b) 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 asphalt c)Asphalt mixes d) Asphalt emulsion are usually tested for extraction.

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

133. a) Distillation b) Viscosity c) Flash point d) Softening point indicated the safe working temperature of the asphalt.

134. The optimum asphalt content obtained in a Marshall Stability Test is the average of the asphalt content of the Maximum stability, maximum density and

a. maximum flowb. maximum air voidsc. 4% air voids d. 45 flow

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

136 . a) Asphalt cement b) 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 than a. 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 excedinga. 50 %b. 40 % c. 45 %d. 60 % when tested by AASHTO T- 96.

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

140. At least one (1) set of 3 concrete cylinder samples shall be taken froma. 50b. 75 c. 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. 3 c. 4 d. 1 percent of material passing the 0.075mm sieve by washing.

142. The degree of compaction required for embankment is at leasta. 100b. 90c. 95 d. 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 placed b. 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 not exceding

a. 150 mmb. 200 mm c. 100 mmd. 250 mm loose requirement, before the next layer is placed.

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

146. To give Bituminous Concrete Surface Course greater resistance to watera. 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 field density of at least

a. 100 b. 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 retained on a 2.00mm (No. 10) sieve is

a. 45b. 50 c. 40d. 55 percent by Los Angeles Abrasion Test determined by AASHTO T-96.

149. In manufacture of culvert pipes, the class of concrete used isa. 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 the weight of aggregate should be

a. 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 not more than

a. 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 coatedb. tack coatedc. prime coated

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

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

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

156. Aggregate base course with a volume of 112,000 m3 will have a minimum number ofa. 74b. 75 c. 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 to traffic 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 m3

a. cement = 37950 x 9.1 = 345,345 bagsb QT of cement = 345,345/2000 = 173c. VFA = 37950 x 0.54 = 20493 ; QFA = 20493/1500 = 14 ; GFA = 20493/75 = 274

VCA = 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 to open PCCP to traffic not later than

a. 14 days after pouring b. 21 days after pouringc. 7 days after pouringd. 28 days after pouring

159. For 850 m3 of concrete paved in one daya. 3 b. 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. 6b. 5c. 3 d. 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 not more than

a. 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 liter b. 1.0 to 1.5 literc. 1.5 to 2.0 liter per square meter.

163. Steel bars for concrete reinforcement is tested for itsa. tensileb. compressionc. bendingd. both a and c properties.

164. For 250 gallons of Red Lead Painta. 1b. 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. 1b. 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. 50b. 20c. 16 quality tests.

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

169. Concrete Hollow Blocks are tested for its a. compressionb. absorption and dimensionc. tensiled. both a and b.

170. Item 306 is calleda. Bituminous Surface Treatmentb. 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 bituminous material (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 mix surface 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. disintegrationb. upheavalc. distortion d. bleeding

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

175 Item ---------- consist of furnishing and placing one or more courses of graded aggregates and one or more application of bituminous material followed by a seal coat with cover aggregates constructed 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 a correspondinga. Job mix formula b. 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 coat b. prime coatc. seal coat d. mortar coat

178. The amount of emulsified asphalt to be added in a Bituminous Plant-Mix Surface Course, Cold Laid (Item 308) shall be ------------ mass percent, total dry aggregate basis:

a. 4 to 8b. 5 to 10 NOTE: If MC is used the proportion of bituminous material on the basis ofc. 6 to 10 total 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. penetrationb. solubilityc. ductility d. viscosity

180. Another name for hot asphalt is -----------a. bituminous asphaltb. asphalt cement c. 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 kerosene c. asphalt cement and gasolined. asphalt cement and emulsifier

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

183. The softness and hardness of an asphaltic material can be determined by -------- test.a. softening pointb. loss on heatingc. penetration d. distillation

184. The temperature of bituminous hot mix delivered in the project site should not be less than its ------- temperature.a. mixing b. compaction c. moldingd. spreading

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

185. The apparatus used in determining the grade of asphalt cement is:a. hydrometerb. penetromanometerc. petronmeterd. penetrometer

186. In an Immersion-Compression test, molding of specimen is done into ------- layer/s.a. 1b. 2 c. 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. petroleneb. asphaltenec. bitumen d. resin

188. ------------- test indicates the temperature in which an asphalt cement may be heated without the danger of catching fire. It is used as criterion in eliminating fire hazards.

a. softening pointb. flash point c. laser pointd. heating point

189. An asphalt pavement needs sufficient -------- to avoid flushing or bleeding.a. compactionb. air voids c. binderd. mineral filler

190. A job – mix formula provides for close control of:a. asphalt contentb. 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 – 800b. MC – 250c. MC – 70 NOTE: For MC, the higher the grade the thickerd. 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 cementb. cutback asphaltc. mineral fillerd. blown asphalt

194. The type of asphaltic material that is usually classified by its viscosity is:a. liquid asphalt b. 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. cationic c. pozzolanicd. ultrasonic

197. The characteristics of a bituminous mix that indicates resistance to disintegration is called:a. stabilityb. flexibilityc. durability d. integrity

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

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

200. In item 310, bituminous Surface Course, Hot laid requires 70% minimum index of retained strength (IRS). In the immersion-compression test, the dry stability is about 900 psi. Based on the data, the wet stability should be at least ------- psi

a. 270b. 630 Wet stability c. 1286 NOTE: IRS = ----------------- X 100d. 1500 Dry stability

201. 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 95c. 95 % mass percent of the density of a laboratory specimen.d. 100 %

202. The rate of application of emulsified asphalt used as tack coat, should be within the range ofa. 0.2 – 0.5 liter/ m2b. 0.2 – 0.7 NOTE: The rate of application of either the Rapid Curing or the c. 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 asphaltb. cutback asphaltc. asphalt cement d. mastic asphalt

204. The optimum asphalt content obtained in a marshall stability test is the average of the asphalt content of maximum stability, maximum density and

a. minimum flow indexb. maximum VMAc. 4 % or designed air voids d. maximum VFA

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

206. In bituminous mixture, aggregates account for 92 % to 95 % of the weight of the mixture, while asphalt ( the binder of the aggregates ) accounts for ---------------

a. 3 – 5 %b. 5 – 8 % NOTE: The proportion of bituminous material on the basis of total c. 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 100mm diameter shall be taken by a saw or core drill for -------- test

a. thickness determinationb. densityc. stabilityd. a and b

208. In an asphalt pavement construction, after spreading bituminous mix, compaction will follow where rolling shall begin at the sides and proceed longitudinally parallel toward the road centerline, each trip overlapping ------- of the roller width, gradually progressing to the crown of the road

a. ½ b. 1c. 1 ½d. 2.0

209. The control of temperature during the mixing and compaction is of great significance in the ---- of the resulting pavement

a. strengthb. skid resistancec. flexibilityd. all of the above

210. based on the minimum testing requirements for Item 309, Bituminous Plant Mix, General, one quality test for asphaltic material requires for every ------ tonnes or fraction thereof.

a. 40 b. 50c. 60d. 70

211. The test in emulsified asphalt which determines the resistance of the emulsion to break when mixed with mineral aggregates

a. solubilityb. sieve testc. cement mixing d. storage stability

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

213. In identifying project location intended for asphalt pavement, which of the following criteria is not appropriate to recommend?

a. drainage facilities is well-maintainedb. 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. 301b. 302c. 308d. 310

215. Which of the following bituminous material is best recommended for sealing weakened plane and construction joints of the PCCP.

a. asphalt cementb. emulsified asphalt c. cutback asphaltd. joint filler asphalt

216. The primary quality control mechanism for the production of asphalt mixtures which will have a high degree of uniformity that will satisfy job requirements is called:

a. marshall stability testb. job mix formula c. immersion – compression stability testd. a and b

217. When a completed asphalt pavement exhibits too much voids, it is usually caused by the following except of:

a. rolling the mixture below the temperature requirementsb. too much coarse aggregatesc. too little binderd. too much fine aggregates

218. Test results from specimen taken from a recently rolled asphalt pavement showed that its total asphalt 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 mixture Pba = absorbed asphalt, percent by weight of aggregate Pb = asphalt content, percent by total weight of mixture Ps = 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 composite aggregates is:

a. 2.58 30 + 50 + 20b. 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, the specific gravity of the mix (if it is voidless) is: specific gravity of asphalt is 1.01.

a. 2.45b. 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 be computed as:

a. 2.51 Gmm - Gmbb. 2.27 % Air Voids = ----------------- x 100c. 2.39 Gmmd. 2.41 2.39 - Gmb

5/100 = ------------------ 2.39

222. If the dry stability of a bituminous mix is 3,950 lbs. And its wet stability is 2,830 lbs., the Index of 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 aggregate c. 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 cement under condition for normal penetration is 9.0 mm ( the penetration scale has 1/10 mm calibration). Asphalt cement is classified as --------- penetration grade.

a. 60 – 70b. 85 – 100 c. 120 – 150d. 200 - 300