Concrete Technology and Design- Part 01
Question No. 01
The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is
(A)Not needed
(B)Provided equally on inner and front faces
(C)Provided more on inner face than on front face
(D)Provided more on front face than on inner face
Answer: Option D
Question No. 02
Bulking of sand is maximum if moisture content is about
(A)2 %
(B)4 %
(C)6 %
(D)10 %
Answer: Option B
Question No. 03
Diagonal tension in a beam
(A)Is maximum at neutral axis
(B)Decreases below the neutral axis and increases above the neutral axis
(C)Increases below the neutral axis and decreases above the neutral axis
(D)Remains same
Answer: Option C
Question No. 04
According to IS: 4561978, the column or the strut is the member whose effective length is greater
than
(A)The least lateral dimension
(B)2 times the least lateral dimension
(C)3 times the least lateral dimension
(D)4 times the least lateral dimension
Answer: Option C
Question No. 05
When shear stress exceeds the permissible limit in a slab, then it is reduced by
(A)Increasing the depth
(B)Providing shear reinforcement
(C)Using high strength steel
(D)Using thinner bars but more in number
Answer: Option A
Question No. 06
The diameter of ties in a column should be
(A)More than or equal to one fourth of diameter of main bar
(B)More than or equal to 5 mm
(C)More than 5 mm but less than one-fourth of diameter of main bar
(D)More than 5 mm and also more than one-fourth of diameter of main bar
Answer: Option D
Question No. 07
In counterfort retaining walls, the main reinforcement in the stem at support is
(A)Not provided
(B)Provided only on inner face
(C)Provided only on front face
(D)Provided both on inner and front faces
Answer: Option B
Question No. 08
Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to
(A)Deflect downward
(B)Deflect upward
(C)Deflect downward or upward
(D)None of the above
Answer: Option A
Question No. 09
The purpose of reinforcement in pre-stressed concrete is
(A)To provide adequate bond stress
(B)To resist tensile stresses
(C)To impart initial compressive stress in concrete
(D)All of the above
Answer: Option C
Question No. 10
Select the correct statement
(A)Elastic modulus of high tensile steel is nearly the same as that of mild steel
(B)Elastic modulus of high tensile steel is more than that of mild steel
(C)Carbon percentage in high carbon steel is less than that in mild steel
(D)High tensile steel is cheaper than mild steel
Answer: Option A
Question No. 11
To minimise the effect of differential settlement, the area of a footing should be designed for
(A)Dead load only
(B)Dead load + live load
(C)Dead load + fraction of live load
(D)Live load + fraction of dead load
Answer: Option C
Question No. 12
Due to circumferential action of the spiral in a spirally reinforced column
(A)Capacity of column is decreased
(B)Ductility of column reduces
(C)Capacity of column is decreased but ductility of column increases
(D)Both the capacity of column and ductility of column increase
Answer: Option D
Question No. 13
For concreting of heavily reinforced sections without vibration, the workability of concrete
expressed as compacting factor should be
(A)0.75 - 0.80
(B)0.80 - 0.85
(C)0.85 - 0.92
(D)Above 0.92
Answer: Option D
Question No. 14
Workability of concrete is directly proportional to
(A)Aggregate cement ratio
(B)Time of transit
(C)Grading of the aggregate
(D)All of above
Answer: Option C
Question No. 15
Which of the following statements is incorrect?
(A)Minimum cross sectional area of longitudinal reinforcement in a column is 0.8%
(B)Spacing of longitudinal bars measured along the periphery of column should not exceed 300
mm
(C)Reinforcing bars in a column should not be less than 12 mm in diameter
(D)The number of longitudinal bars provided in a circular column should not be less than four
Answer: Option D
Question No. 16
Critical section for shear in case of flat slabs is at a distance of
(A)Effective depth of slab from periphery of column/drop panel
(B)d/2 from periphery of column/capital/ drop panel
(C)At the drop panel of slab
(D)At the periphery of column
Answer: Option B
Question No. 17
For road pavements, the cement generally used, is
(A)Ordinary Portland cement
(B)Rapid hardening cement
(C)Low heat cement
(D)Blast furnace slag cement
Answer: Option B
Question No. 18
Pick up the incorrect statement from the following:
(A)Space between the exterior walls of a warehouse and bag piles should be 30 cm
(B)Cement bags should preferably be piled on wooden planks
(C)Width and height of the pile should not exceed 3 m and 2.70 m respectively
(D)None of these
Answer: Option D
Question No. 19
For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus
correction factor to the moments obtained by Grashoff Rankine's theory
(A)Is always less than 1
(B)Is always greater than 1
(C)Can be more than 1
(D)Can be less than 1
Answer: Option A
Question No. 20
Addition of pozzolana to ordinary port land cement, causes
(A)Decrease in early strength
(B)Reduction in chemical action with sulphates
(C)Increase in shrinkage
(D)All the above
Answer: Option D
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