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The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or
24 bar diameters
30 bar diameters
18 bar diameters
36 bar diameters
12 bar diameters
If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept
3.0 M
4.0 m
None of these.
3.5 m
4.5 m
Thickened part of a flat slab over its supporting column, is technically known as
column head
None of these.
drop panel
Capital
The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as
Magnel-Blaton system
C.L. standard system
Lee-McCall system.
Freyssinet system
The minimum clear cover for R.C.C. columns shall be
smaller of 25 mm or diameter
smaller of 40 mm or diameter
greater of 25 mm or diameter
greater of 40 mm or diameter
A per IS : 1343, total shrinkage for a pretensioned beam, is
3.5 x 10-5
3.0 x 10-5
3.0 x 10-2
3.0 x 10-3
3.0 x 10-4
In a cantilever retaining wall without a heel slab
All the above.
base slab is made 10 cm thicker than the stem
thickness of the stem is kept same throughout
width of the base slab is kept 0.7 time the total height of the wall
Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by
Rankine-Marcus formula.
Marcus formula
Rankine formula
Rankine Grashoff formula
Grashoff formula
If the permissible compressive stress for a concrete in bending is C kg/m2, the modular ratio is
2800/C2
2800/3C
2300/2C
2800/C
If permissible working stresses in steel and concrete are respectively 1400 kg/cm2 and 80 kg/cm2 and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is
37 cm
39 cm
40 cm
38 cm
A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is
30
35
40
50
45
For a number of columns constructed in a rcjw, the type of foundation provided, is
raft
strap
footing
a combination of the above.
strip
For stairs spanning horizontally, the minimum waist provided is
6 cm
10 cm
8 cm
12 cm.
4 cm
The design of a retaining wall assumes that the retained earth
is dry
All the above.
is free from moisture
is not cohesives
consists of granular particles
The maximum diameter of a bar used in a ribbed slab, is
24 mm
22 mm
12 mm
6 mm
20 mm
If W is weight of a retaining wall and P is the horizontal earth pressure, the factor of safety against sliding, is
1.25
1.5
1.0
2.5
2.0
A foundation rests on
foundation soil
subgrade
base of the foundation
both (b) and (c)
A flat slab is supported
All the above
on beams and columns
on beams
on columns monolithicaily built with slab
on columns
On an absolutely rigid foundation base, the pressure will
be zero at the centre of the foundation.
be more at the edges of the foundation
be uniform
not be uniform
As the percentage of steel increases
None of these.
depth of neutral axis decreases
lever arm decreases
depth of neutral axis increases
lever arm increases
1
2
5
10
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