ME Reviewer 2 600 Problems PDF

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What is the sample for compressive strength determination of a structural concrete? Answer: concrete cylinder sample What is the test to determine the consistency of concrete? Ans: Slump test What is the length required for RSB sample for quality test? Ans: 1 m/10,000 kg/size/shipment How many sampl...

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What is the sample for compressive strength determination of a structural concrete? Answer: concrete cylinder sample What is the test to determine the consistency of concrete? Ans: Slump test What is the length required for RSB sample for quality test? Ans: 1.0 m/10,000 kg/size/shipment How many samples should be taken for every 75 cu.m fresh concrete? Ans: 1 set consist of 3-pcs sample What is the required size of test specimen for G.I. sheets? Ans: 3 pcs-60 mm in 1 sht/100 sheets What kind of paint that has a reflectance or beads? Ans: Reflectorized Paint What is that construction material that has a property of being a dark brown to black cementitious material in which the predominating substance is bitumen? Ans: asphalt For how long or how many hours shall a bituminous prime coat be left undisturbed? Ans: 24 hours What is the rate of application of bituminous tack coat? Ans: 0.2 to 0.7 L/sq.m 10. What is the penetration grade of blown asphalt? Ans: 0 to 30 penetration grade 11. What kind of sample is taken for flexural test? Ans: Concrete beam sample 12. What are the tests needed for the 2.650 cu.m Item 201 (Aggregate Base Course)? Ans: CBR, abrasion, GPCD 13. How many grading tests are required for a 3,200 cu.m selected borrow topping (Item 104)? Ans: 3 grading tests 14. As a materials Engineer, what will you recommend if you find out that the materials to be used as Item 200 if finer than the required materials? Ans: blend Item 200 with coarser materials 15. What is the standard specification for LL and PI of Item 201? Ans: maximum of 25% and maximum of 6% respectively 16. What is the CBR requirement for Item 201? Ans: 80% maximum 17. What asphalt is used for sealing weaken plane joint of concrete pavement? Ans: Blown Asphalt 18. What is Item 311 of the DPWH Specification (Blue Book)? Ans: Portland Cement Concrete Pavement

19. What is the machine used for abrasion test? Ans: Los Angeles Abrasion Machine

20. How to determine the degree of compaction of Items 104, 200, & 201? Ans: by Field Density Test 21. What is the formula in obtaining the value of PI? Ans: Liquid Limit minus Plastic Limit 22. What are the other terms for sieve analysis? Ans: Grading Test, Particle Size Distribution Test, Mechanical Analysis 23. What is the degree of compaction of the soil if the wet density is 2,200 kg/m3, with an actual moisture content of 10.2% and a maximum dry density of 1,960 kg/m3? Ans: 101.23% 24. How many concrete cores shall be taken for one (1) kilometer concrete pavement? Ans: 5 holes/km/lane 25. What is the moisture content of the soil having an original weight of 162.5 grams and an oven – dried weight of 138.2 grams? Ans: 17.58% 26. If the group index of a soil is high, what indication does it mean? Ans: the soil is clayey 27. As a Materials Engineer, how can you determine that the sample placed in the oven is already oven – dried? Ans: if the sample reaches its constant weight 28. In oven drying a sample for test, what temperature shall be maintained? o

Ans: 110 ± 5 C 29. Why is it that cooling an oven dried sample before weighing is advisable? Ans: because it can affect its weight 30. What is the difference between hygroscopic moisture content from natural moisture content? Ans: hygroscopic moisture content is the moisture content of an air- dried sample while natural moisture content is the moisture content of the original sample from the field. 31. For how many bags of cement does a 10 kgs. sample represents? Ans: 2000 bags 32. For 15, 000 kgs RSB, how many samples shall be submitted for Quality Test? Ans: 2 pcs – 1 m sample 33. An admixture is being introduced to the fresh concrete mixture for heavily reinforced concrete structure using a pumpcrete to pump out the fresh concrete mix, what admixture should it be? Ans: Superplasticizer 34. What is the use of blown asphalt? Ans: as joint filler and water proofing 35. What asphalt is commonly known as hot asphalt or penetration grade asphalt? Ans: Asphalt Cement 36. How many days does the sample for Immersion – Compression Test be soaked in water? Ans: 4 days @ 50 oC 37. If ductility test is for asphalt, _____ is for cement? Consistency

Ans: Magnesium Oxide, Insoluble Residue, Loss on Ignition 38. Paint is composed of _____

Ans: 35% vehicle, 50% pigment, 15% beads 39. What is the size of tamping rod used in tamping concrete sample? Ans: 16 mm Ø and 610 mm long with hemispherical tip 40. What is the temperature to be maintained when curing sample after its initial curing? Ans: 23o C ± 1.7o C 41. Concrete cylinders are cured and ready for test. Temperature between 63°F to 85°F are permitted for a period not to exceed _____ hours immediately prior to test if free moisture is maintained on the surface of the specimen at all times. Ans: three (3) 42. The molds of specimen not to be transported shall be removed after initial curing of _____ hours and should be cured to the standard curing temperature of 73.4 °F ± 3°F Ans: Twenty-four (24) 43. High plasticity index means _____ of a soil? Ans: high degree of compressibility 44. Sample to be used for liquid limit and plastic limit tests should pass to what sieve? Ans: No. 40 (0.425 mm) 45. What compaction rammer shall used if the specs given for Moisture – Density Relation Test (MDR) is T – 180? Ans: 4.54 kg with 457 mm drop 46. A bean mold measuring 6” x 6” x 20 is to be used for sampling concrete, how many blows/tamps per layer shall be applied? Ans: 60 blows/layer 47. If asphalt mix having a weight of 3,020g and an aggregate weighing 2,865.98g, what is the % asphalt by weight of mix? Ans: 5.10% 48. What is the material used for Bituminous Prime Coat? Ans: Cut-back asphalt 49. In Item 303, application of cover aggregates shall be evenly spread over the surface at the rate of approximately _____? Ans: 0.004 to 0.007 m3/m2 50. Applying the tolerance of 0.4% for asphalt content to your answer in prob. 47, what is the acceptable range of asphalt content? Ans: 4.7% to 5.5% 51. An embankment having a PI of 30%, LL of 40% and GI of 0, what is the degree of compaction for this kind of soil? Ans: 95% degree of compaction 52. The minimum cement factor for concrete Class “A” is 9 bags/cu.m, how about for concrete Class “B”? Ans: 8 bags/ cu.m 53. Quality control testing in a DPWH project is the responsibility of the_____? Ans: Contractor 54. As Materials Engineer, when is the right time to start sampling and testing aggregates? Ans: Once the source is identified 55. The minimum compressive strength for concrete Class “P” is 5,000 psi, what is the minimum compressive strength for concrete Class “C”? Ans: 3000 psi 56. The volume of concrete mixer per batch shall not exceed the mixer’s nominal capacity in cu.m as shown on the manufacturer’s standard plate

on the mixer, except that an overload up to _____ percent above the mixer’s nominal capacity may be permitted provided concrete test data for strength, segregation, and uniform consistency are satisfactory, and provided that no spillage of concrete takes place.

Answer: Ten (10) 57. Where do we take additional cores when the measurement of any core taken from pavement is deficient in thickness by more than 25 mm? Answer: at no less than 5 meter intervals parallel to the centerline in each direction from the affected location 58. Under what climatic condition do we use lower penetration grade or hard asphalt? Answer: hot climate (cold climate – higher penetration grade or soft asphalt) 59. What is the basis for the acceptance or rejection of any construction material? Answer: Materials test results/reports 60. Penetration test is for asphalt: cement is to _____? Answer: consistency 61. Slump test is a very important test in fresh concrete to determine _____? Answer: consistency of concrete 62. How many samples should be taken for an asphalt mix for each full day’s operation? Answer: at least one but not to exceed three samples 63. The thickness of asphalt core using a caliper is based on how many measurements? Answer: four (4) 64. The thickness of concrete core using a caliper is based on how many measurements? Answer: nine (9) 65. Failed samples do not necessarily mean that the structure it represents is defective, why? Answer: may be the sampling is incorrect 66. The specification calls for a 1: 2:4 concrete mix. In a one bagger mixer, which of the following amount of water is most likely required for the mix? Answer: 20 liters 67. The spot test on asphalt is used to determine ______. Answer: overheating during the process of manufacture 68. How many samples shall be submitted for test if 315 pails of flat wall enamel paint are to be used in the project? Answer: four (4) pails 69. Aggregate Sub – base course has a volume of 5, 000 cu.m and to be laid in a 15cm compacted depth. How many samples shall be submitted for CBR test and for sieve analysis? Answer: 2 samples for CBR and 17 samples for sieve analysis 70. How many samples shall be submitted for quality test if 60 tons of Bituminous Prime Coat is to be used in the project? Answer: Two (2) samples 71. How many compaction tests shall be conducted for Item 201 having a volume of 8,250 cu.m? Answer: Six (6) compaction tests 72. What composed of Materials Quality Control Monthly Reports? Answer: Summary of field tests and status of test 73. What is the required mixing of mortar for Item 505 (Stone Masonry)? Answer: 1 part cement and 2 parts sand by volume with sufficient water 74. What is the required mixing of mortar for Item 500 (Pipe Culverts and Storm Drains)?

Answer: 1 part cement and 2 parts sand by volume with sufficient water

75. Before the project starts, the materials Engineer or the technician must have a program on how many samples for each item of work should be tested based on the minimum testing requirements. What program or report is this? Answer: Quality Control Program 76. If sample splitter is not available for use in reducing samples for test, what is the alternative way of reducing sample for testing size? Answer: apply quartering method and get two opposite sides as sample 77. The road will not be opened to traffic until test specimens molded and cured have attained the minimum strength requirements. If such tests are not conducted prior to the specified age the pavement shall not be operated to traffic until _____ days after the concrete was placed. Answer: Fourteen (14) 78. As the work progresses, the Materials Engineer should know how many sample has been submitted and tested and how many samples are to be submitted, in other words the ME must refer to what report so that he/she may be updated on the balance and on file quality test of the construction materials being used in the project? Answer: Status of Test 79. It is the minimum moisture content at which the soil can be molded without breaking or crumbling up to 1/8” (3.2 mm). Answer: Plastic Limit 80. The _____ is expressed as the moisture content corresponding to 25 blows. Answer: Liquid Limit 81. The concrete has been tested for consistency by the use of a slump cone with base and tamping rod. After the test, the height of concrete measured is 178 mm. what is the slump of the concrete? Answer: 127 mm 82. What is the rate of revolution per minute of an abrasion Machine used for testing the mass percent of wear? Answer: 30 – 33 rpm 83. If the design of concrete mix has the following corrected batch weights: cement = 40 kgs, fine aggregates = 65 kgs, coarse aggregate = 115 kgs, and water = 15 liters. What is your actual batch weights for 1 cu.m Class “A” concrete? Answer: 360 bags of cement; 585 kgs of fine aggregates; 1035 kgs coarse aggregates; 130 liters water 84. After the soil has been tested in an Abrasion Machine, the mass % of wear computed is equal to 21%. If this material is for Item 201, does it pass the DPWH specs? Answer: Yes, because the specs is 50% maximum 85. Quality Control Assurance Report should be submitted every _____? Answer: week 86. One of the duties of Materials Engineer is to see to it that all the construction materials be tested: Answer: before it is incorporated into work 87. What is the maximum depth or roadway embankment per horizontal layer in loose measurement? Answer: 200 mm loose measurement 88. Why is it that 6 samples are needed for quality test of concrete masonry? Answer: 3 samples for compressive strength and 3 samples for absorption 89. Sample submitted for test should have a tag bearing the name of the project, the quantity represented, kind of sample, original source, who sampled and who submitted it, the date sampled and date submitted and etc. What is the common name of that tag for you as Materials Engineer? Answer: Sample Card

90. If course aggregate like embankment is to be placed in layers, how many layers should a 40 cm thick Aggregate Base Course is placed? Answer: Three (3)

91. The ME should always be alert of his schedule with regards to the number of days of a quality test that takes place. Since not all construction materials can be tested just for a day or even a week so, what is the lead time should he consider for a quality test of a cement sample? Answer: One (1) month 92. CBR Sample for test has been compacted but it should be soaked for how many days before testing? Answer: Four (4) 93. If sieve analysis and plasticity test are used for Soil Classification, what test that its result be used in field density test? Answer: Compaction Test or Moisture Density Relation Test 94. Heavy rains occur the night before prior to your scheduled field density test, are you going to pursue your schedule? Why? Answer: No, because the moisture content is high and can affect the result 95. Checking the gradation of composite aggregates and asphalt content of asphalt mix can be done by what test? Answer: Extraction Test 96. What is the device used in testing for liquid limit test? Answer: liquid limit device with grooving tool 97. What apparatus is used in plastic limit test? Answer: glass plate 98. How long does a vibrator be inserted in a concrete mix? Answer: not to exceed 15 seconds at 50 – 60 cm interval 99. Along the slope of high embankment _____ is provided as an erosion control measures and also to improve the stability of the slope. Answer: Berm 100. In soil and sub – surface explorations for flood control design of foundation condition, a soil sample was taken for field and laboratory tests. The test required for soil was taken, except Answer: specific gravity, abrasion, water content, Atterberg Limits, gradation, compaction, relative density 101. Structure crossing above such covered underground drainage conduit shall be laid at least _____ above the top of the conduit. Answer: 1.0 m, 0.5 m, 1.5 m, 2.0 m 102. Class of stones for riprap ranging from 30 kgs to a maximum of 70 kgs with at least 50% of the stones weighing more than 50 kgs. Answer: Class B 103. Class of stones for riprap ranging from 15 kgs to a maximum of 25 kgs with at least 50% of the stones weighing more than 20 kgs. Answer: Class A 104. Class of stones for riprap ranging from 60 kgs to a maximum of 100 kgs with at least 50% of the stones weighing more than 80 kgs. Answer: Class C 105. Class of stones for riprap ranging from 100 kgs to a maximum of 200 kgs with at least 50% of the stones weighing more than 1500 kgs. Answer: Class D 106. The maximum size of stone for stone masonry. Answer: 150 mm 107. The maximum size of aggregate for item 300. Answer: 1 inch 108. Required maximum liquid limit for Item 300. Answer: 35%

109. Required plasticity index range on Item 300. Answer: 4% to 9%

110. Range of sand size. Answer: 2.0 mm to 0.050 mm Ø 111. The ratio of the volume of voids to volume of solids Answer: void ratio 112. The ratio of the weight of water to the weight of solids Answer: moisture content 113. Significance of grading test are, except Answer: Gives particle size distribution, measures permeability, capillarity, measures the potential cohesion of soil 114. Significance of plasticity index are, except Answer: indicates compressibility, permeability, indicates the clay fraction of a binder material, measures the shearing resistance of soil 115. Properties of concrete are, except Answer: workability, strength, durability, cracking 116. In roadway construction test on sub grade, the following will determine the economical thickness, except Answer: embankment, base, surfacing, sub-base 117. The relative consistency of a cohesive soil in natural state. Answer: Liquidity Index 118. In Atterberg limit, the following are determined, except Answer: shrinkage limit, liquid limit, plastic limit, group index 119. Minimum time for removal of forms and false works for centering under girders, beam, frames and arches. Answer: 14 days (minimum % of design strength – 80%) 120. Minimum time for removal of forms and false works for floor slabs. Answer: 14 days (minimum % of design strength – 70%) 121. Minimum time for removal of forms and false works for walls. Answer: 1 day (minimum % of design strength – 70%) 122. Minimum time for removal of forms and false works for columns. Answer: 2 days (minimum % of design strength – 70%) 123. Minimum time for removal of forms and false works for side of beams and all other vertical surfaces. Answer: 1 day (minimum % of design strength – 70%) 124. Amass of solid reinforced concrete cast around the head of a group of piles to ensure that act as a unit to support the imposed load Answer: Pile cap 125: An embankment shall be compacted layer by layer. Answer: 150 mm 126. Class of concrete deposited in water. Answer: Class Seal 127. Class of concrete used in all superstructures and heavily reinforced substructures. The important parts of the structure included are slabs, beams, girders, columns, arch ribs, box culverts, reinforced abutments, retaining walls, and reinforced footings. Answer: Class A 128. Class of concrete used in footings, pedestal, massive pier shafts, pipe bedding and gravity walls, unreinforced or w/ only a small amount of

reinforcement. Answer: Class B

129. Class of concrete used in thin reinforced sections, railings, pre-cast piles, cribbing, and for filler in steel grid floors. Answer: Class C 130. Class of concrete used in pre – stressed concrete structures and members. Answer: Class P 131. Height of dropping concrete to the point of deposit Answer: 1.50 m 132. Reflectorized Thermoplastic Pavement Markings Answer: Item 612 133. Permitted variation from the design thickness of layer for Item 300 Answer: + 15 mm and – 5 mm 134. Item 310 shall have a mass percent of air voids with range of _____ Answer: 3% to 5 % 135. Dowel bars for PCCP shall be _____ Answer: plain bars 136. Concrete beam sample when tested by Third – Point Method shall have a flexural strength of _____ when tested in 14 days. Answer: 3.80 MPa 137. When the required thickness of Item 200 is more than 150 mm, the aggregate sub – base shall spread and compacted in ____ `Answer: two or more layers 138. Item 202 shall have a minimum soaked CBR value of _____ Answer: 80% 139. Permitted variation from design thickness of layer for Item 201. Answer: ± 10 mm 140. Sieve designation standard (in mm) for 0.425 mm to alternate US standard Answer: No. 40 141. If slag is used as course aggregate for Item 311, the minimum density is _____ Answer: 1,120 kg/m3 142. Minimum price allowed of contract for deficiency in strength of concrete specimens for PCCP which 10% to less than 15% Answer: 70% 143. This joint is also called cold joint. It is constructed when there is an interruption of more than 30 minutes in the concreting operation Answer: Transverse Construction Joint 144. Minimum variation of the surface from the testing edge of the straight edge between contacts with the surface in Item 310 Answer: 6.0 mm 145. Portland Cement Treated Plant Mix Base Course after the completion of the final rolling, the surface will be treated with bituminous curing seal, how much is the rate of application? Answer: 0.5 L/m2 to 1.0 L/m2 146. In Item 201, the volume required in the project is 10,000 cu.m. The required number of CBR test is _____ Answer: four (4) 147. Slump test of concrete determines the following, except

Answer: workability, fluidity, consistency, job density 148. The significance of li...