Black cotton soil is unsuitable for foundations because its
Bearing capacity is low
Permeability is uncertain
Particles are cohesive
Property to undergo a volumetric change due to variation of moisture content
Correct Answer :
D. Property to undergo a volumetric change due to variation of moisture content
Related Questions
Two columns 50 cm × 50 cm and 60 cm × 60 cm carry 80 tonnes and 120 tonnes of loads respectively. The centre to centre distance between columns is 5.00 metres. The permissible bearing capacity of the soil is 20 t/m2. If the footing is not to project more than 25 cm beyond the outside of the smaller column, pick up the correct design parameters of the footing from the following:
Distance of C.G. of the loads from the smaller column = 3.00 m
The length of the foundation slab = 7.00 m
Area of footing slab = 11.00 m2
All the above
In case of foundations on sandy soil, maximum permissible differential settlement, is usually limited to
15 mm
25 mm
35 mm
45 mm
Cast iron piles
Are suitable for works under sea water
Resist shocks or vibrations
Are suitable for use as batter piles
Are useful for heavy vertical loads
The piece of a brick cut along the centre of width in such a way that its length is equal to that of full brick, is called
Half brick
Queen closer
King closer
Bevelled closer
For plastering the exposed brick walls, the cement sand mortar should be
1 : 2
1 : 3
1 : 4
1 : 6
For each storey of a building, the depth of exploration should be
1 metre
2 metres
3 metres
4 metres
Expansion joints in masonry walls are provided if length exceeds
10 m
20 m
30 m
40 m
The type of ashlar masonry in which stones are finely chisel dressed and thickness of joints does not exceed 3 mm, is
Chamfered ashlar masonry
Ashlar facing masonry
Random coursed ashlar masonry
Coursed ashlar masonry
A wooden block fixed on back side of a door frame on its post, is known as
Cleat
Stop
Horn
None of these
Pick up the incorrect statement from the following:
The width of the wall is constructed thicker at the base in a stepped fashion
A long vertical load transferring concrete structure is called a concrete pile
In pile which transfers the load to the soil by the friction between the pile and the surrounding soil is called friction pile
The pile which transfers the load to a hard rock bed at certain depth is called load bearing
The bearing capacity of a water logged soil, may be improved by
Grouting
Chemical action
Drainage
Compaction
To ensure that supporting area of an offset footing of a boundary wall is fully compressive, the C.G. of load must act
At the centre of the base
Within the middle third of the base
Within the middle fifth of the base
Neither (a), (b) nor (c)
As compared to English bond, double Flemish bond is
Stronger
More compact
Costly
None of the above
The predominant constituent which is responsible for strength in granite is
Quartz
Felspar
Mica
None of the above
The line of intersection of two surfaces of a sloping roof forming an internal angle less than 180°, is known as
Ridge
Hip
Valley
None of these
Dado is usually provided in
Dining halls
Bath rooms
Living rooms
Verandah
The nominal thickness of one brick wall in mm, is
90 mm
150 mm
190 mm
200 mm
A concrete structure is set on fire and the temperature raises to 1000°C. The strength of concrete as compared to original strength reduces to
10 %
15 %
20 %
25 %
The size of a floor tile commonly used, is
15 cm × 15 cm × 1.8 cm
20 cm × 20 cm × 2 cm
22.5 × 22.5 cm × 2.2 cm
All the above
The function of king post in a king post roof truss is
To support the frame work of the roof
To receive the ends of principal rafter
To prevent the walls from spreading outward
To prevent the tie beam from sagging at its centre
The construction joints in buildings are provided after
10 m
15 m
20 m
40 m
The range of spread from the wall base to outer edge of a brick work foundation does not exceed
1/2 horizontal to 1 vertical
2/3 horizontal to 1 vertical
1 horizontal to 1 vertical
2 horizontals to 1 vertical
Pick up the correct statement from the following:
The sand in the sand pile is well compacted
The sand is kept moist at the time of placing and tamping
Sand piles are generally used under column loads
All of the above
The inclined support at the ends of treads and rises of a stair, is known as
Baluster
Header
String
Beam
In clay soil
Swelling and shrinkage characteristics prevail
Consolidation continues even after several years of construction
Differential settlement is generally prevalent
All the above
The angular steps used for changing direction of the stairs, are called
Round steps
Angular steps
Winders
Radial steps
Pick up the correct statement from the following:
Inclined borings are made for taking samples under existing structures
Inclined borings are occasionally used instead of vertical holes
The spacing of inclined borings is kept such that one bore hole is vertically above the bottom of an adjacent bore hole
All the above
A floor constructed with 3 mm marble chips, is known
Mosaic floor
Terrazzo floor
Chips floor
Marble floor
The form work from the sides of beams can be removed only after
1 day
4 days
7 days
14 days
The depth of excavation of foundations, is generally measured with a
Ranging rod
Steel tape
Levelling staff
Boning rod