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)
Correct Answer :
B. Within the middle third of the base
Related Questions
In flat roof of reinforced cement concrete, the recommended angle of slope, is
Zero
A few degrees
10°
200°
In which of the following pairs both trees yield soft wood?
Deodar and Shishum
Chir and sal
Sal and teak
Chir and deodar
Grillage foundation
Is used to transfer heavy structural loads from steel columns to a soil having low bearing capacity
Is light and economical
Does not require deep cutting as the required base area with required pressure intensity is obtained at a shallow depth
All the above
Which one of the following piles has a cast iron shoe even after removal of the hollow cylindrical steel casing?
Simplex pile
Pedestal pile
Vibro pile
Both (a) and (c) of the above
The process of making the back ground rough, before plastering, is
Dubbing
Hacking
Blistering
Peeling
The alignment of a cross joint along the plumb line is
Bed block
Perpend
Lintel
Vertical line
The type of arch generally constructed over a wooden lintel or over a flat arch for the purpose of carrying the load of the wall above is
Segmental arch
Pointed arch
Relieving arch
Flat arch
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
A pre-stressed concrete pile is
Easy to handle
Lighter in weight
Extremely durable
All the above
Pick up the correct statements from the following:
Cracks appear on the plastered surface in the form of hair cracks
In brick work, the efflorescence is removed by applying a solution of zinc sulphate and water
Excessive thermal variations in the backing or plaster causes the plaster to fall
All the above
The stone blocks approximately triangular in shape, used as steps, are known
Stone steps
Built up steps
Spandril steps
None of these
In ordinary residential and public buildings, the damp proof course is generally provided at
Ground level
Plinth level
Water table level
Midway ground level and water-table level
The bearing capacity of granite is generally
5 to 10 kg/cm2
15 to 20 kg/cm2
30 to 35 kg/cm2
40 to 45 kg/cm2
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
A roof which slopes in four directions, is called
Shed roof
Gable end roof
Hipped roof
Gambrel roof
The maximum permissible deflection of a timber beam supporting a roof, is
L/100
L/150
L/260
L/360
The X-ray rooms are plastered with
Plaster of Paris
Barium plaster
Martin's cement
Keen's cement
Crown is located at
Highest point on the extrados of the arch
Highest point on the intrados of the arch
Skew-back of the arch
None of these
The type of footing which is used to transmit heavy loads through steel columns is
Raft foundation
Grillage foundation
Well foundation
Isolated footing
The important test to be conducted on a stone used in docks and harbours is
Hardness test
Workability test
Weight test
Toughness test
For plastering the exposed brick walls, the cement sand mortar should be
1 : 2
1 : 3
1 : 4
1 : 6
Best type of piles for soft soil having little resistance to the flow of concrete, is
Simplex pile
Vibro pile
Raymond pile
Franki pile
For constructing a terrazzo floor, Pick up the incorrect statement from the following:
A base course is prepared as in cement concrete flooring
A 32 mm thick layer of cement concrete (1 : 2 : 4) is laid on the base course and the surface is made smooth by trowelling
Glass strips are driven into the layer according to the pattern required
After final grinding is over, oxalic acid mixed with water is spread over and rubbed hard with soft material
Pick up the incorrect statement from the following:
The function of foundation is to distribute the load of super structure over a large bearing area
No timbering is required for shallow trenches
Shallow foundations can be constructed on made-up soil
Black cotton soil is very good for foundation bed
The wedge shaped bricks forming an arch ring, are called
Soffits
Voussoirs
Haunches
Spandrils
Pick up the correct statement from the following:
In a king post truss, principal rafter and tie beams are jointed together with a bridle joint
Joint between the principal rafter and the king post is made by making tenon and mortise respectively
Joint between strut and king post, is generally of mortise and tenon type
All the above
Pick up the correct statement from the following:
The cost of square rooms is less
The expenditure on the foundation and roof for the double storeyed building is nearly half of that for the ground storeyed building
The cost of construction of a house may be minimised by restricting the height floors
All the above
For the construction of flyovers in sandy soils, the type of foundation provided, is
Strap footing
Raft footing
Combined footing
Pier footing
Suitable spacing of timber piles, is
50 cm
60 cm
80 cm
90 cm
An arch constructed with finely dressed stones, is known
Ashlar arch
Rubble arch
Gauged arch
Axed arch