The raft slab is projected beyond the outer walls of the structure by
5 to 10 cm
15 to 20 cm
25 to 30 cm
30 to 45 cm
Correct Answer :
D. 30 to 45 cm
Related Questions
The art of bringing the floor to a true level surface by means of screeds, is called
Topping
Bedding
Screeding
None of these
The form Work including the props can be removed from beams, only after
3 day
7 days
14 days
21 days
Pick up the correct statement from the following:
Sand consists of coarse particles of silica formed due to the disintegration of rocks
The grains of sand are not affected by frost
Sand beds are permeable and do not allow water to rise up between pores due to capillary action
All the above
The piece of a brick cut with its one corner equivalent to half the length and half the width of a full brick, is known as
Queen closer
Bevelled closer
King closer
Half king closer
If a is the offset of concrete bed in cms, and d is the depth of concrete bed in cms, then
d = 0.445 a
d = 0.557 a
d = 0.775 a
None of these
Pick up the correct statement from the following:
Isolated footing is provided under column to transfer the load safely to soil bed
Column footings may have steps or projections in the concrete base
Heavily loaded column base must be provided steel reinforcement in both directions
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
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
A floor constructed with the 4 to 6 mm marble chips, is know
Reinforced marble floor
Terrazzo floor
Marble floor
Chip floor
In flat roof of reinforced cement concrete, the recommended angle of slope, is
Zero
A few degrees
10°
200°
Exposed portions of vertical surface at right angles to the door or window frame, are known as
Jambs
Lintels
Reveals
Soffits
The highest line of sloping roof, where two opposite slopes meet, is known as
Rafter
Ridge
Crown
Eave
The term string is used for
The underside of a stair
Outer projecting edge of a tread
A sloping member which supports the steps in a stair
A vertical member between two treads
The 19 cm × 9 cm side of a brick as seen in the wall face, is generally known as
Stretcher
Face
Front
Header
Pick up the correct statement from the following:
The pile driven in sand is called sand pile
The drilled hole filled with sand is called sand pile
The sand piles are used for bearing purposes
None of these
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
Engineering news formula for obtaining safe bearing capacity of pile for drop hammer, is,
Q = Wh/6 (S + 2.5)
Q = Wh/2.5 (S + 6)
Q = (W × 6)/h (S + 2.5)
Q = (W × 2.5)/6 (S + h)
Pile foundation is generally provided if soil is
Compressible
Water logged
Made up
All the above
The vertical sides of a door and window openings provided in a wall, are known as
Verticals
Reveals
Jambs
None of these
The process of working a flat for the finishing coat, is known
Dubbing out
Floating
Knitting
Blistering
The depth of excavation of foundations, is generally measured with a
Ranging rod
Steel tape
Levelling staff
Boning rod
Bearing capacity of soils cannot be improved by
Draining sub-soil water
Ramming crushed stone in soil
Driving sand piles
Watering surface of soil
The maximum permissible differential settlement, in case of foundations in clayey soil, is usually limited to
10 mm
20 mm
30 mm
40 mm
Assertion A : Shishum is used for decorative woodwork. Reason R : Shishum can be polished to an excellent finish. Select your answer according to the coding system given below:
Both A and R is true and R is the correct explanation of A
Both A and R is true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
The lower edge of the pitched roof, from where the rain water of the roof surface drops down, is known as
Hip
Gable
Ridge
Eaves
For brick construction, the lime-sand mortar, is
1 : 1
1 : 2
1 : 3
1 : 4
The minimum depth of foundation in clayey soils is
0.5 m
0.7 m
0.9 m
1.2 m
In grillage foundations a minimum 15 cm cover is provided on
Upper flange of top tier
Lower beam of lower tier
Ends of external beams
None to these
The maximum number of steps in a flight should generally be restricted to
10
12
15
No limit
A covering of concrete placed on the exposed top of an external wall, is known as
Cornice
Coping
Frieze
Lintel