11) For M20 grade of concrete, the maximum shear stress shall not exceed
a) 1.6 N/mm2
b) 1.9 N/mm2
c) 2.8 N/mm2
d) 2.2 N/mm2
12) What is the anchorage value of a standard hook of a reinforcement bar of diameter D?
a) 4D
b) 8D
c) 12D
d) 16D
13) In the above case maximum shear for design is
(a) 0.5 (wd + wL)l
(b) 0.6 (wd + wL)l
(c) (0.5 wd 0.6 wL)l
(d) (0.6 wd + 0.5 wL)l
14) The bond strength between steel and concrete is due to
a) friction
b) adhesion
c) both friction and adhesion
d) None of these
15) IS 456–2000 recommends that the unsupported length of any column should not exceed ______
times the least lateral dimension of the column.
(a) 15
(b) 25
(c) 36
(d) 60
16) The ratio of the maximum and minimum percentage of longitudinal reinforcement that can be provided in a column is
a) 6
b) 7.5
c) 5
d) 8
17) In a public building width of stair should be at least
(a) 1000 mm
(b) 1200 mm
(c) 1500 mm
(d) 1800 mm
18) According to IS 465, the slenderness ratio for a short column should not exceed
a) 12
b) 18
c) 24
d) None of these
19) Which one of the following is the correct statement about R.C. retaining wall
(a) toe slab and heel slab are provided with reinforcements at top face
(b) toe slab and heel slab are provided with reinforcement at bottom face
(c) toe slab is provided with reinforcement at top face and heel slab at bottom face
(d) toe slab is provided at bottom face and heel slab at bottom face
20) When minimum eccentricity in columns does not exceed 0.05 times the lateral dimension, the axial load carrying capacity is reduced by
a) 8%
b) 11%
c) 14%
d) 20%