1. The maximum amount of dust which may be permitted in aggregates is
Correct : D. all the above
2. Bulking of sand is
Correct : D. swelling of sand when wetted
3. For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the
diameter of bar nor less than
Correct : D. 40 mm
4. Workability of concrete is measured by
Correct : B. slump test
5. The size of fine aggregates does not exceed
Correct : D. 4.75 mm
6. The main reason for providing number of reinforcing bars at a support in a simply supported beam
is to resist in that zone
Correct : C. bond stress
7. The entrained air in concrete
Correct : A. increases workability
8. According to IS: 4561978, the flexural strength of concrete is
Correct : C. directly proportional to square root of compressive strength
9. Slump test is done for
Correct : D. concrete
10. Di-calcium silicate (C2S)
Correct : B. generates less heat of hydration
11. The limits of percentage p of the longitudinal reinforcement in a column is given by
Correct : C. 0.8% to 6%
12. The risk of segregation is more for
Correct : D. all the above
13. Le-Chatelier's apparatus is used for testing
Correct : A. soundness of cement
14. Construction joints are generally provided in concrete
Correct : D. all the above
15. If a grading curve is horizontal between the portions of 20 mm I.S. Sieve and 4.75 mm I.S. Sieve,
the graded aggregates do not contain
Correct : D. all the above
16. Most common method of pre-stressing used for factory production is
Correct : A. long line method
17. C.R.R.I. charts are used to obtain a relationship between strength of concrete and
Correct : A. water cement ratio
18. For the design of retaining walls, the minimum factor of safety against overturning is taken as
Correct : B. 2.0
19. 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
Correct : D. 25 %
20. If aggregates completely pass through a sieve of size 75 mm and are retained on a sieve of size 60
mm, the particular aggregate will be flaky if its minimum dimension is less than
Correct : C. 40.5 mm
21. If the foundations of all the columns of a structure are designed on the total live and dead load
basis, then
Correct : C. the settlement of exterior columns will be more than interior columns
22. Saw dust can be rendered chemically inert by boiling it in water containing
Correct : A. ferrous sulphate
23. A concrete having a slump of 6.5 cm, is said to be
Correct : D. plastic
24. To obtain a very high strength concrete, use very fine grained
Correct : A. granite
25. Vicat apparatus is used for
Correct : B. consistency test
26. Which of the following losses of pre-stress occurs only in pre-tensioning and not in posttensioning?
Correct : A. elastic shortening of concrete
27. The type of aggregates of same nominal size, which contain less voids when compacted, are
Correct : A. rounded spherical
28. Pre-stress loss due to friction occurs
Correct : A. only in post-tensioned beams
29. Pick up the correct statement from the following:
Correct : D. all the above
30. In the method of voids for determination of the quantity of cement paste, it is assumed that
Correct : D. all the above
31. As compared to ordinary Portland cement, use of pozzolana cement
Correct : C. increases shrinkage
32. The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary
method of proportioning
Correct : D. 1 : 4 : 10
33. The strength and quality of concrete, depend upon:
Correct : D. all the above
34. The factor of safety for
Correct : B. steel is lower than that for concrete
35. The preliminary test is repeated if the difference of compressive strength of three test specimens,
exceeds
Correct : D. 15 kg/cm2
36. Setting time of cement increases by adding
Correct : A. gypsum
37. According to IS: 4561978, the maximum reinforcement in a column is
Correct : C. 6 %
38. According to the recommendations of IS : 456-1978, the expansion joints
Correct : D. all the above
39. The impurity of mixing water which affects the setting time and strength of concrete, is
Correct : C. sodium carbonates and bicarbonates
40. If the size of panel in a flat slab is 6 m × 6 m, then as per Indian Standard Code, the widths of
column strip and middle strip are
Correct : C. 3.0 m and 3.0 m
41. Pick up the incorrect statement from the following:
Correct : D. the mould is in the form of a frustum of hexagonal pyramid
42. The concrete mix which causes difficulty in obtaining a smooth finish, possess
Correct : C. hardness
43. While designing the pile as a column, the end conditions are nearly
Correct : C. one end fixed and other end hinged
44. The internal dimensions of a ware house are 15 m × 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
Correct : D. 3000 bags
45. Pick up the incorrect statement from the following. While performing preliminary test on concrete
Correct : D. concrete ingredients should be kept at a temperature of 37° ± 2°c
46. In a spherical dome the hoop stress due to a concentrated load at crown is
Correct : B. tensile everywhere
47. I.S. Sieve Nos. 10 mm and 4.75 mm are generally used for grading of
Correct : D. both (a) and (b)
48. Log Angles machine is used to test the aggregate for
Correct : C. abrasion resistance
49. The property of the ingredients to separate from each other while placing the concrete is called
Correct : A. segregation
50. Pick up the correct statement from the following:
Correct : D. all the above
51. The process of mixing, transporting, placing and compacting concrete using Ordinary Port land
Cement should not take more than
Correct : A. 30 minutes
52. The strength of concrete after one year as compared to 28 days strength is about
Correct : C. 20 to 25% more
53. Specified compressive strength of concrete is obtained from cube tests at the end of
Correct : D. 28 days
54. Pick up the incorrect statement from the following:
Correct : D. tricalcium silicate (c3s) has more resistance to sulphate attack
55. If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly
reinforced rectangular balanced section will be
Correct : B. 0.40 d
56. A construction joint is provided where
Correct : D. all the above
57. Sand generally contains salt if it is obtained from:
Correct : C. sea beds
58. According to IS: 4561978, minimum slenderness ratio for a short column is
Correct : A. less than 12
59. Water cement ratio is
Correct : D. both (a) and (b) of the above
60. For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of water
required per bag, is
Correct : C. 14 kg
61. is the span)
Correct : C. l/7
62. Pick up the incorrect statement from the following:
Correct : C. in single size aggregates, bulk density is maximum
63. To prevent segregation, the maximum height for placing concrete, is
Correct : A. 100 cm
64. For a simply supported beam of span 15 m, the minimum effective depth to satisfy the vertical
deflection limits should be
Correct : B. 750 mm
65. For compacting plain concrete road surface of thickness less than 20 cm, we use
Correct : B. screed vibrator
66. Expansion joints are provided if the length of concrete structures exceeds
Correct : D. 45 m
67. The permissible diagonal tensile stress in reinforced brick work is
Correct : A. about 0.1 n/mm²
68. Pick up the correct statement from the following:
Correct : D. all the above
69. Separation of water or water sand cement from a freshly concrete, is known
Correct : A. bleeding
70. The critical section for finding maximum bending moment for footing under masonry wall is
located
Correct : C. halfway between the middle and edge of the wall
71. On a grading curve, the gap grading is represented by
Correct : A. a horizontal line
72. High temperature
Correct : B. decreases the strength of concrete
73. Horizontal construction joints in concrete walls are generally provided at
Correct : D. all the above
74. Stress strain curve of high tensile steel
Correct : C. does not show definite yield point but yield point is defined by 0.2% proof stress
75. Addition of pozzolana to cement causes
Correct : D. all the above
76. Permissible compressive strength of M 200 concrete grade is
Correct : C. 200 kg/cm2
77. The minimum diameter of longitudinal bars in a column is
Correct : C. 12 mm
78. The high strength of rapid hardening cement at early stage, is due to its
Correct : C. increased lime cement
79. Sand requiring a high water cement ratio, belongs to
Correct : A. zone i
80. Minimum grade of concrete to be used in reinforced concrete as per IS: 4561978 is
Correct : A. m 15
81. While compacting the concrete by a mechanical vibrator, the slump should not exceed
Correct : B. 5.0 cm
82. Non-uniform compaction may cause the concrete
Correct : D. all the above
83. Modulus of rupture of concrete is a measure of
Correct : A. flexural tensile strength
84. M10 grade of concrete approximates
Correct : A. 1 : 3 : 6 mix
85. Higher workability of concrete is required if the structure is
Correct : D. thick and heavily reinforced
86. For a cantilever of effective depth of 0.5 m, the maximum span to satisfy vertical deflection limit is
Correct : A. 3.5 m
87. The bulk density of aggregates does not depend upon:
Correct : D. size and shape of the container
88. How long will it take for the concrete to achieve 100% of its strength?
Correct : D. 28 days
89. A higher modular ratio shows
Correct : B. lower compressive strength of concrete
90. For the construction of cement concrete floor, the maximum permissible size of aggregate, is
Correct : D. 10 mm
91. The specifications of a cement bag for storage, are
Correct : D. all the above
92. The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on
Correct : A. top face perpendicular to wall
93. Separation of coarse aggregates from mortar during transportation, is known
Correct : C. segregation
94. A flaky aggregate is said to be elongated if its length is
Correct : B. twice the mean size
95. You are asked to construct a massive dam, the type of cement you will use, is
Correct : C. low heat cement
96. An ideal ware house, is provided
Correct : D. all the above
97. Normally pre-stressing wires are arranged in the
Correct : B. lower part of the beam
98. Pick up the correct statement from the following:
Correct : D. all the above
99. The minimum percentage of chemical ingredient of cement is that of