Questions
41. The live load to be considered for an accessible roof is-
Nil
75 kg/m^3
200 kg/m²
150 kg/m²
42. A column is considered long if the effective length of column to its least lateral dimension is more than-
10
15
12
20
43. Minimum number of reinforcing bars required in a circular column is-
4
6
5
8
44. In a single reinforced beam, the effective depth is measured from its compression edge to-
tensile edge
tensile reinforcement
neutral axis of the beam
longitudinal central axis
45. What is the live load for residential building?
20 lb/ft²
30 lb/ft²
40 Ib/ft²
60 lb/ft²
46. Cast iron is used for:
Structural work in beam
Small size tank
Columns work
Boundary walls
47. On the basis of intensity of earthquaks, Bangladesh has been divided into generalised seismic zones of
2
3
4
5
48. The minimum number of main steel bars provided in RCC.
rectangular column is 4
circular column is 8
octagonal column is 16
all the above
49. Thickness of base, in no case, should be more than-
10 cm
15 cm
20 cm
30 cm
50. What is the unit weight of brick work?
100 Ib/fr^3
120 Ib/ft^3
140 Ib/ft^3
160 Ib/ft^3
51. The transverse reinforcement provided at right angles to the main reinforcement in a slab-
Distributed load
Resist the temperature stress
Resist the shrinkage stress
All of the above
52. The spacing of transverse reinforcement of column is decided by the following considerations-
The least lateral dimension of the column
Sixteen times the diameter of the smallest longitudinal reniforcing rod is the column
Forty-eight times the diameter of transverse reinforcement
all the above
53. A Slab may be designed as one way if the ratio of its longer side to shorter side exceeds.
1.5
1.75
2.00
2.25
54. Why are steel reinforcing rods used in concrete beams-
To make it carry compression
To make it carry tension
To make it carry both compression and tension
None of these
55. A flat slab is supported on-
beams
columns
beams and columns
None of these
56. According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to-
the weight of the body
more than the weight of the body
less than the weight of the body
weight of the fluid displaced by the body
57. বাংলাদেশের প্রচলিত নির্মাণে স্বাভাবিক অবস্থায় Beam-এর bottom-এর Reinforcement-এর Clear cover কত?
3/4"
1.5"
1"
2"
58. The steel used for the manufacture of rails, is-
bessemer steel
cast steel
mild steel
stainless steel
59. Steel generally used in RCC work is-
Mild steel
Stainless steel
High carbon steel
High tension steel
60. A pretensioned concrete beam, 100 mm wide and 300 mm deep in prestressed by straight wire. Modulus of elasticity of steel and concrete are 210 N/mm² and 35 N/mm² respectively. Find modular ratio.
14
7
6
3