1. For quality control of Portland cement, the test essentially done is
a) setting time
b) soundness
c) tensile strength
d) all the above.
2. If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,
a) 20%
b) 25%
c) 30%
d) 35%
3. Under normal conditions using an ordinary cement, the period of removal of the form work, is :
a) 7 days for beam soffits
b) 14 days for bottom slabs of spans 4.6 m and more
c) 21 days for bottom beams over 6 m spans
d) all the above.
4. Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor Wp / Wf is 0.95, the workability of concrete is
a) extremely low
b) very low
c) high
d) none of these.
5. For given water content, workability decreases if the concrete aggregates contain an excess of
a) thin particles
b) flat particles
c) elongated particles
d) all the above.
6. M10 grade of concrete approximates
a) 1 : 3 : 6 mix
b) 1 : 1 : 2 mix
c) 1 : 2 : 4 mix
d) none of these.
7. For ensuring quality of concrete, use
a) single sized aggegates
b) two sized aggregate
c) graded aggregates
d) coarse aggregates.
8. According to I.S. : 456, the number of grades of concrete mixes, is
a) 3
b) 4
c) 5
d) 7
9. The mixture of different ingredients of cement, is burnt at
a) 1000°C
b) 1200°C
c) 1400°C
d) 1600°C
10. The risk of segregation is more for
a) wetter mix
b) larger proportion of maximum size aggregate
c) coarser grading
d) all the above.
11. After casting, an ordinary cement concrete on drying
a) expands
b) mix
c) shrinks
d) none of these.
12. Hydration of cement is due to chemical action of water with
a) Tricalcium silicate and dicalcium silicate
b) Dicalcium silicate and tricalcium aluminate
c) Tricalcium aluminate and tricalcium alumino ferrite
d) All the above.
13. To obtain cement dry powder, lime stones and shales or their slurry, is burnt in a rotary kiln at a temperature between
a) 1100° and 1200°C
b) 1200° and 1300°C
c) 1300° and 1400°C
d) 1400° and 1500°C
14. Permissible compressive strength of M 300 concrete grade is
a) 100 kg/cm2
b) 150 kg/cm2
c) 200 kg/cm2
d) 300 kg/cm2
15. The standard sand now a days used in India, is obtained from
a) Jaipur (Rajasthan)
b) Jullundur (Punjab)
c) Hyderabad (Andhra Pradesh)
d) Ennore (Madras)
16. The maximum amount of dust which may be permitted in aggregates is
a) 5% of the total aggregates for low workability with a coarse grading
b) 10% of the total aggregates for low workability with a fine grading
c) 20% of the total aggregates for a mix having high workability with fine grading
d) all the above.
17. Proper proportioning of concrete, ensures
a) desired strength and workability
b) desired durability
c) water tightness of the structure
d) all the above.
18. The bulk density of aggregates does not depend upon :
a) size and shape of aggregates
b) specific gravity of aggregates
c) size and shape of the container
d) none of these.
19. Curing
a) reduces the shrinkage of concrete
b) reduces the shrinkage of concrete
c) prevents the loss of water by evaporation
d) all of the above.
20. While compacting the concrete by a mechanical vibrator, the slump should not exceed
a) 2.5 cm
b) 5.0 cm
c) 7.5 cm
d) 10 cm
21. Construction joints are provided
a) where B.M. and S.F. are small
b) where the member is supported by other member
c) at 18 m apart in huge structures
d) all the above.
22. An aggregate is said to be flaky if its least dimension is less than
a) 1/5th of mean dimension
b) 2/5th of mean dimension
c) 3/5th of mean dimension
d) none of these.
23. The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning
a) 1 : 1 : 2
b) 1 : 2 : 4
c) 1 : 3 : 6
d) 1 : 4 : 10
24. The increased cohesiveness of concrete, makes it
a) less liable to segregation
b) more liable to segregation
c) more liable to bleeding
d) none of these.
25. The ratio of the length to breadth of a wooden float, is
a) 4.5
b) 5.5
c) 6.5
d) 7.5
26. To ensure constant moisture content in aggregates
a) area of each aggregate pile should be large
b) height of each aggregate pile should not exceed 1.50 m
c) aggregate pile should be left for 24 hours before aggregates are used
d) all the above.
27. Workability improved by adding
a) air-entraining agent
b) foaming agent
c) oily-agent
d) all the above.
28. The commonly used material in the manufacture of cement is
a) sand stone
b) slate
c) lime stone
d) graphite.
29. If 20 kg of coarse aggregate is sieved through 80 mm, 40 mm, 20 mm, 10 mm, 4.75 mm, 2.36 mm, 1.18 mm, 600 micron, 300 micron and 150 micron standard sieves and the weights retained are 0 kg, 2 kg, 8 kg, 6 kg, 4 kg respectively, the fineness modulus of the aggregate, is
a) 7.30
b) 7.35
c) 7.40
d) none of these.
30. Curing a concrete for long period ensures better
a) volume stability
b) strength
c) water tightness and durability
d) all the above.
31. For the construction of cement concrete floor, the maximum permissible size of aggregate, is
a) 4 mm
b) 6 mm
c) 8 mm
d) 10 mm
32. The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known
a) grading
b) curing
c) batching
d) none of these.
33. Pick up the correct statement from the following:
a) Insufficient quantity of water makes the concrete mix harsh
b) Insufficient quantity of water makes the concrete unworkable
c) Excess quantity of water makes the concrete segregated
d) All the above.
34. The preliminary test is repeated if the difference of compressive strength of three test specimens, exceeds
a) 5 kg/cm2
b) 8 kg/cm2
c) 10 kg/cm2
d) 15 kg/cm2
35. Pick up the correct proportions of chemical ingredients of cement
a) Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3
b) Silica : Lime : Alumina : Iron oxide : 63 : 22 : 6 : 3
c) Alumina : Silica : Lime : Iron oxide : 63 : 22 : 6 : 3
d) Iron oxide : Alumina : Silica : Lime : 63 : 22 : 6 : 3
36. Transport of concrete by pumps, is done for a distance of
a) 100 m
b) 200 m
c) 400 m
d) none of these.
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37. IfX, Y and Z are the fineness modulli of coarse, fine and combined aggregates, the percentage (P) of fine aggregates to combined aggregates, is
a) 
b) 
c) 
d) 
38. Slump test is done for
a) clay
b) sand
c) lime
d) concrete.
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39. The high strength of rapid hardening cement at early stage, is due to its
a) finer grinding
b) burning at high temperature
c) increased lime cement
d) higher content of tricalcium.
40. Pick up the correct statement from the following:
a) The weight of ingredients of concrete mix, is taken in kilograms
b) Water and aggregates are measured in litres
c) The finished concrete is measured in cubic metres
d) All the above.
41. Concrete mainly consists of
a) cement
b) aggregates
c) admixture
d) all the above.
42. Vicat's apparatus is used for
a) fineness test
b) consistency test
c) setting time test
d) soundness test
43. M 150 grade of concrete approximates
a) 1 : 3 : 6 mix
b) 1 : 1 :2 mix
c) 1 : 2 : 4 mix
d) none of these.
44. Workability of concrete is measured by
a) Vicat apparatus test
b) Slump test
c) Minimum void method
d) Talbot Richard test.
45. The rock which is not calcareous, is :
a) lime stone
b) macl
c) laterite
d) none of these.
46. Internal friction between the ingredients of concrete, is decreased by using
a) less water
b) fine aggregates
c) more water and coarse aggregates
d) none of these.
47. For road pavements, the cement generally used, is
a) ordinary Portland cement
b) rapid hardening cement
c) low heat cement
d) none of these.
48. Construction joints are generally provided in concrete
a) roads
b) retaining walls
c) lining of canals
d) all the above.
49. Separation of coarse aggregates from mortar during transportation, is known
a) bleeding
b) creeping
c) segregation
d) none of these.
50. According to the recommendations of IS : 456-1978, the expansion joints
a) are provided where plane changes abruptly
b) are provided to ensure minimum resistance
c) are supported on separate columns
d) all the above.
51. Grading of sand causes great variation in
a) workability of concrete
b) strength of concrete
c) durability of concrete
d) all the above.
52. Shrinkage in concrete can be reduced by using
a) low water cement ratio
b) less cement in the concrete
c) proper concrete mix
d) all the above.
53. Ordinary concrete is not used for concrete grade
a) M 100
b) M 150
c) M 200
d) M 400
54. 1.S. Sieve Nos. 10 mm and 4.75 mm are geneally used for grading of
a) coarse aggregates
b) fine aggregates
c) neither (a) nor (b)
d) both (a) and (b)
55. Pick up the correct statement from the following:
a) The free water is the amount of water added while mixing and the amount of water held on the surface of the aggregates prior to mixing
b) The total water is the free water and the amount actually absorbed by the aggregates
c) Neither (a) nor (b)
d) Both (a) and (b).
56. Addition of pozzolana to ordinary port land cement, causes
a) decrease in early strength
b) decrease in early strength
c) increase in shrinkage
d) all the above.
57. Too wet concrete may cause
a) weakness of concrete
b) excessive laitance
c) segregation
d) all the above.
58. Addition of pozzolana to cement causes
a) reduction in permeability
b) loss of heat of hydration
c) reduction in bleeding
d) all the above.
59. Hardening of cement occurs at
a) rapid rate during the first few days and afterwards it continues to increase at a decreased rate
b) slow rate during the first few days and afterwards it continues to increase at a rapid rate
c) uniform rate throughout its age
d) none of these.
60. Pick up the correct statement from the following:
a) Lime in excess, causes the cement to expand and disintegrate
b) Silica in excess, causes the cement to set slowly
c) Magnesium oxide in excess, remains in free state and makes the cement unsound
d) All the above.
61. Batching error means inaccuracy in the quantity of
a) aggregates
b) cement
c) water
d) all the above.
62. Pick up the correct statement from the following i.
a) Higher workability indicates unexpected increase in the moisture content
b) Higher workability indicates deficiency of sand
c) If the concrete mix is dry, the slump is zero
d) All the above.
63. You are asked to construct a massive dam, the type of cement you will use, is
a) ordinary Portland cement
b) rapid hardening cement
c) low heat cement
d) blast furnace slag cement
64. The produce impermeable concrete
a) thorough mixing of concrete is required
b) proper compaction of concrete is required
c) proper curing of concrete is required
d) all the above.
65. Water required per bag of cement, is
a) 7 kg
b) 14 kg
c) 21 kg
d) 35 kg
66. Pick up the incorrect statement from the following:
a) The bottom and top ends of slump mould are parallel to each other
b) The axis of the mould is perpendicular to the end faces
c) The mould is in the form of a frustum of hexagonal pyramid
d) None of these.
67. ISI has specified full strength of concrete after
a) 7 days
b) 14 days
c) 21 days
d) none of these.
68. For construction of structures in sea water, the cement generally preferred to, is
a) Portland-pozzolana cement
b) quick setting cement
c) low heat Portland cement
d) none of these.
69. Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is
a) 30%
b) 40%
c) 50%
d) 60%
70. For batching 1:3:6 concrete mix by volume, the ingredients required per bag of 50 kg cement, are:
a) 70 litres of sand and 120 litres of aggregates
b) 70 kg of sand and 140 litres of aggregates
c) 105 litres of sand and 210 litres of aggregates
d) none of these.
71. The process of hardening the concrete by keeping its surface moist is known
a) placing
b) wetting
c) curing
d) none of these.
72. The grade of concrete not recommended by I.S. : 456, is
a) M 100
b) M 200
c) M 300
d) M 500
73. C.R.R.I. charts are used to obtain a relatioship between strength of concrete and
a) water cement ratio
b) workability
c) grading of aggregate
d) none of these.
74. Proper batching ensures
a) economy
b) durability
c) workability
d) 7 all the above.
75. Workability of concrete for a given water content is good if the aggregates, are
a) rounded aggregate
b) irregular aggregate
c) angular aggregate
d) flaky aggregates.
76. Pick up the correct statement from the following:
a) Bulking of sand is caused due to formation of a thin film of surface moisture
b) With 10% moisture content by weight, the bulking of sand is increased by 50%.
c) The volume of fully saturated sand, is equal to the volume of dry and loose sand
d) All the above.
77. For compacting plain concrete road surface of thickness less than 20 cm, we use
a) internal vibrator
b) screed vibrator
c) form vibrator
d) none of these.
78. Pick up the correct statement from the following:
a) Construction joints are necessarily planned for their locations
b) Expansion joints are provided to accommodate thermal expansion
c) Construction joints are provided to control shrinkage cracks
d) All the above.
79. Pick up the correct statement from the following:
a) Segregation is necessary for a workable concrete
b) Consistency does not affect the workability of concrete
c) If the slump increases, workability decreases
d) None of these.
80. Specified compressive strengh of concrete is obtained from cube tests at the end of
a) 3 days
b) 7 days
c) 21 days
d) 28 days
81. An aggregate is said to be flaky, if its least dimension is less than
a) 2/3 mean dimension
b) 3/4 mean dimension
c) 3/5 mean dimension
d) none of these.
82. Pick up the incorrect statement from the following:
a) A rich mix of concrete possesses higher strength than that a lean mix of desired workability with excessive equantity of water
b) The strength of concrete decreases as the water cement ratio increases
c) If the water cement ratio is less than 0.45, the concrete is not workable and causes honey-combed structure
d) None of these.
83. The percentage of the aggregate of F.M. 2.6 to be combined with coarse aggregate of F.M. 6.8 for obtaining the aggregates of F.M. 5.4, is
a) 30%
b) 40%
c) 50%
d) 60%.
84. The final operation of finishing floors, is known as
a) screeding
b) floating
c) trowelling
d) all the above.
85. The internal dimensions of a ware house are 15 m x 5.6 m, and the maximum height of piles is 2.70 m, the maximum number of bags to be stored in two piles, are
a) 1500 bags
b) 2000 bags
c) 2500 bags
d) 3000 bags
86. For an ordinary Portland cement
a) residual does not exceed 10% when sieved through IS Sieve No. 9
b) soundness varies from 5 to 10 mm
c) soundness varies from 5 to 10 mm
d) all the above.
87. The maximum thickness of concrete floor of a cement warehouse, is
a) 10 cm
b) 15 cm
c) 20 cm
d) 25 cm
88. A construction joint is provided where
a) bending moment is small
b) shear force is small
c) the member is supported by other member
d) all the above.
89. The compaction of concrete, improves
a) density
b) strength
c) durability
d) all the above.
90. Pick up the correct statement from the following:
a) Water cement paste hardens due to hydration
b) During hardening cement binds the aggregates together
c) Cement provides strength, durability and water tightness to the concrete
d) All the above.
91. The light weight aggregates are obtained from
a) sedimentary rocks
b) metamorphic rocks
c) igneous rocks
d) volcanic source.
92. If the depth of moist sand in a cylinder is 15 cm and the depth of the sand when fully inundated with water is 12 cm, the bulking of the moist sand, is
a) 10%
b) 12%
c) 15%
d) 25%.
93. Pick up the correct statement from the following:
a) According to the petrological characteristics, concrete aggregates are classified as heavy weight, normal weight and light weight
b) According to the shape of the particles, concrete aggregates are classified as rounded irregular, angular and flaky
c) According to the surface texture of the particles, the concrete aggregates are classified as glassy, smooth, granular, rough, crystalline, honey combed and porous
d) All the above.
94. Segregation is responsible for
a) honey-combed concrete
b) porous layers in concrete
c) surface scaling in concrete
d) all the above.
95. Addition of pozzolana to cement
a) decreases workability
b) increases strength
c) increases heat of hydration
d) none of these.
96. The datum temperature for maturity by Plowman, is
a) 23°C
b) 0°
c) - 5.6°C
d) - 11.7°C
97. Pick up the incorrect statement from the following:
a) The degree of grinding of cement, is called fineness
b) The process of changing cement paste into hard mass, is known as setting of cement
c) The phenomenon by virtue of which cement does not allow transmission of sound, is known as soundness of cement
d) None of these.
98. Permissible compressive strength of M 150 concrete grade is
a) 100 kg/cm2
b) 150 kg/cm2
c) 200 kg/cm2
d) 300 kg/cm2
99. Slump test of concrete is a measure ofits
a) consistency
b) compressive strength
c) tensile strength
d) impact value.
100. Pozzolana cement is used with confidence for construction of
a) dams
b) massive foundations
c) abutments
d) all the above.
101. Water cement ratio is
a) volume of water to that of cement
b) weight of water to that of cement
c) weight of concrete to that of water
d) both (a) and (b) of the above.
102. Efflorescence in cement is caused due to an excess of
a) alumina
b) iron oxide
c) silica
d) alkalis
103. If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed
a) 10 cm
b) 15 cm
c) 20 cm
d) 25 cm
104. The diameter of the Vicat plunger is 10 mm and its length varies from
a) 20 mm to 30 mm
b) 30 mm to 40 mm
c) 40 mm to 50 mm
d) none of these.
105. The shrinkage of concrete
a) is proportional to water content is the mix
b) is proportional to cement concrete
c) increases with age of concrete
d) all the above.
106. The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is
a) 1 : 2 : 4
b) 1 : 3 : 6
c) 1 : 1.5 : 3
d) 1 : 1 : 2
107. Separation of water or water sand cement from a freshly concrete, is known
a) bleeding
b) creeping
c) segregation
d) none of these.
108. Slump test of concrete is a meausre ofits
a) consistency
b) compressive strength
c) tensile strength
d) impact value.
109. According to Water-Cement Ratio Law, the strength of workable plastic concrete
a) depends upon the amount of water used in the mix
b) does not depend upon the quality of cement mixed with aggregates
c) does not depend upon the quanity of cement mixed with aggregates
d) all the above.
110. Pick up the incorrect statement from the following:
a) In properly graded aggregates, bulk density is more
b) In single size aggregates, bulk density is least
c) In single size aggregates, bulk density is maximum
d) None of these.
111. Saw dust can be rendered chemically inert by boiling it in water containing
a) ferrous sulphate
b) potassium chloride
c) ammonia
d) nitric acid
112. Pick up the correct statement from the following:
a) High percentage of C3S and low percentage of C2S cause rapid hardening
b) High percentage of C3S and low percentage of C2S make the cement less resistive to chemical attack
c) High percentage of C3S and low percentage of C2S contribute to slow hardening
d) All the above.
113. The factor which affects workability, is
a) water content and its temperature
b) shape and size of the aggregates
c) grading and surface textures of the aggregates
d) all the above.
114. The cement whose strength is a little lower than the ordinary cement during the first three months but attains afterwards the same strength, is known as
a) low-heat Portland cement
b) rapid hardening Portland cement
c) Portland blast slag cement
d) none of these.
115. Pick up the correct statement from the following:
a) Sand stones may be divided into calcareous, siliceous and ferrugineous sand stones
b) Concrete using sand stones, cracks due to excessive shrinkage
c) Very hard and close grained crystallined lime stones are suitable aggregates but provide low strength
d) All the above.
116. Pick up the correct statement from the following:
a) Water enables chemical reaction to take place with cement
b) Water lubricates the mixture of gravel, sand and cement
c) Only a small quantity of water is required for hydration of cement
d) All the above.
117. Pick up the incorrect statement applicable to the field test of good cement.
a) When one thrusts one's hand into a bag of cement, one should feel warm
b) The colour of the cement is bluish
c) A handful of cement thrown into a bucket of water should sink immediately
d) All the above.
118. Pick up the correct statement from the following:
a) Calcium chloride acts as a retarder
b) Calcium chloride acts as an accelerator
c) Gypsum (calcium sulphate) acts as a retarder
d) Both (c) and (b).
119. Joints in concrete structures, are provided
a) to reduce the tensile stresses likely to be developed due to evaporation of water
b) to minimise the change in the dimensions of the slab
c) to minimise the necessary cracking
d) all the above.
120. If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is
a) 15, 900 litres
b) 16, 900 litres
c) 17, 900 litres
d) 18, 900 litres
121. The condition not applicable to water cement ratio law, is
a) internal moisture conditions on hydration continue till complete strength is gained
b) concrete specimens may be tested at any temperature
c) concrete specimens need be of same age
d) none of these.
122. High temperature
a) increases the strength of concrete
b) decreases the strength of concrete
c) has no effect on the strength of concrete
d) none of these.
123. The bulk density of aggregates, is generally expressed as
a) tonnes/cubic metre
b) kg/cubic metre
c) kg/litre
d) none of these.
124. The grade of concrete M 150 means that compressive strength of a 15 cm cube after 28 days, is
a) 100 kg/cm2
b) 150 kg/cm2
c) 200 kg/cm2
d) 300 kg/cm2
125. Allowable shear strength of concrete, depends upon
a) shear strength
b) tensile strength
c) compressive strength
d) none of these.
126. The most useless aggregate is one whose surface texture is
a) smooth
b) granular
c) glassy
d) honey combed and porous.
127. To obtain a very high strength concrete, use very fine grained
a) Granite
b) Magnetite
c) Barite
d) Volcanic scoria.
128. Concrete containing
a) silicious aggregates, has higher co-efficient of expansion
b) igneous aggregates, has intermediate coefficient of expansion
c) lime stones, has lowest co-efficient of expansion
d) All the above.
129. An ordinary Portland cement when tested for its fineness, should not leave any residue on I.S. seive No. 9, more than
a) 5%
b) 10%
c) 15%
d) 25%
130. The top diameter, bottom diameter and the height of a slump mould are :
a) 10 cm, 20 cm, 30 cm
b) 10 cm, 30 cm, 20 cm
c) 20 cm, 10 cm, 30 cm
d) 20 cm, 30 cm, 10 cm
131. Workability of concrete mix with low water cement ratio is determined by
a) tensile strength test
b) slump test
c) compaction factor test
d) none of these.
132. While designing an air entrained concrete
a) water cement ratio is reduced
b) proportion of aggregates is reduced
c) an allowance for the entrained air is made
d) all the above.
133. Pick up the incorrect statemnt from the following. For performing compressive strength test of cement
a) cement and standard sand mortar are used in the ratio of 1 : 3
b) A cube mould of 10 cm x 10 cm x 10 cm is used
c) The perpared moulds are kept in a atmosphere of 50% relative humidity
d) The temperature of water in the submerged tank for curing moulds, should be 27° ± 2°C.
134. For concreting tunnel linings, tran-portation of concrete is done by
a) pans
b) wheel borrows
c) containers
d) pumps
135. The operation of removing humps and hollows of uniform concrete surface, is known as
a) floating
b) screeding
c) trowelling
d) none of these.
136. The void ratio of
a) single size coarse aggregate is roughly 0.45.
b) graded coarse aggregate is roughly 0.040
c) fine aggregate is roughly 0.45
d) all the above.
137. The type of aggregates not suitable for high strength concrete and for pavements subjected to tension, is
a) rounded aggregate
b) irregular aggregate
c) angular aggregate
d) none of these.
138. For the construction of R.C.C. slabs, columns, beams, walls, etc. the grade of concrete mix used, is
a) 1 : 3 : 6
b) 1 : 4 : 8.
c) 1 : 2 : 4
d) 1 : 1 : 2
139. The type of aggregates of same nominal size, which contain less voids when compacted, are
a) rounded spherical
b) irregular
c) flaky
d) none of these.
140. For the construction of cement con-certe dams, the maximum permissible size of the aggregates, is
a) 40 mm
b) 50 mm
c) 60 mm
d) 70 mm
141. Permissible compressive strength of M 200 concrete grade is
a) 100 kg/cm2
b) 150 kg/cm2
c) 200 kg/cm2
d) 300 kg/cm2
142. For preparing a test-specimen, it is necessary
a) to mix cement and fine aggregate by dry hand
b) to mix coarse aggregates
c) to mix water to the cement, fine aggregates and coarse aggregates
d) all the above.
143. The aggregate containing moisture in pores and having its suface dry, is known as
a) moist aggregates
b) very dry aggregates
c) saturated surface dry aggregate
d) none of these.
144. The commercial name of white and coloured cement in India, is
a) colocrete
b) rainbow cement
c) silvicrete
d) all the above.
145. Pick up the correct statement from the following:
a) An increase in water content must be accompanied by an increase in cement content
b) Angular and rough aggregates reduce the workability of the concrete
c) Large size aggregates increase the workability due to lesser surface area
d) All the above.
146. To hydrate 500kg of cement full water needed, is
a) 100 kg
b) 110 kg
c) 120 kg
d) 130 kg
