Lime concrete is generally used for
Wall foundations
Flooring at ground level
Both (A) and (B)
Neither (A) nor (B)
Correct Answer :
B. Flooring at ground level
Related Questions
The percentage of alumina and silica in good fire clay vary respectively is
25, 75
30, 70
35, 65
All of these
The usual percentages of clay and metal in cermet are:
50%, 50%
60%, 40%
70%, 30%
80%, 20%
Asbestos cement
Is brittle
Warps due to changes in humidity
Strength is lowered when saturated by water
All of the above
Crushing strength of a good building stone should be more than
50 MPa
100 MPa
150 MPa
200 MPa
The specific gravity of marble, is
2.50
2.60
2.66
2.72
The variety of pig iron used for manufacture of wrought iron, is
Bessemer pig
Grey or foundry pig
White forge pig
Mottled pig
To give a brilliant finish, the type of varnish used, is
Water varnish
Spirit varnish
Turpentine varnish
Oil varnish
Water paint is a
White wash
Colour wash
Whiting
All the above
Asbestos is
Corrugated sheet used for roofing
An incombustible fire proof material
An organic substance
All the above
The trunk of tree left after cutting all the branches is known as
Log
Batten
Plank
Baulk
Pick up the correct statement from the following:
Adding 5% to 6% of moisture content by weight, increases the volume of dry sand from 18% to 38%
The bulking of fine sand is more than that of coarse sand
If the percentage content of moisture exceeds 10%, increase in bulk of sand starts increasing
All the above
For one cubic metre of brick masonry, number of bricks required, is
400
425
450
500
Pozzolana (or surkhi) is used in lime
To impart hydraulicity
To prevent shrinkage
To decrease the cost of construction
To decrease the setting time
Stones used for rubble masonry must be
Soft
Hard
Light
Heavy
Index number expressing the relative sizes of both coarse and fine aggregates, is called
Proportioning of aggregates
Fineness modulus
Grading of aggregates
None of these
Cross cut saw is used for
Cutting soft stones
Cutting hard stones
Cutting large blocks of stones
Dressing stones
The commonly used thinner in oil paints, is
Naphtha
Turpentine
Both (a) and (b)
None the these
The main constituent of fly-ash, is
Aluminium oxide
Silica
Ferrous oxide
All of these
Advantage of a clamp compared to a kiln for burning bricks is that
It takes less time for burning
It gives more output of first class bricks
It has less initial cost
It is suitable when bricks are required in large numbers
French polish is
Oil paint
Distemper
Spirit varnish
None to these
Linseed oil is used in paints as
Thinner
Vehicle
Base
Drier
Rocks formed due to alteration of original structure due to heat and excessive pressure are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Calcination of iron ores is done
To remove moisture
To remove carbonic acid
By roasting in heaps
All the above
For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of
1 : 2
1 : 3
1 : 4
1 : 6
A good brick earth should contain:
About 20% to 30% of alumina
About 50% to 60% of silica
Not more than 5% of lime
All the above
Which of the following represents a metamorphic rock? (i) Slate (ii) Shale (iii) Quartzite The correct answer is
Only (iii)
Both (i) and (iii)
Both (ii) and (iii)
All (i), (ii) and (iii)
Asbestos
Is an excellent insulator for heat and electricity
Is fire-proof and acid proof
Has sp. gravity equal to 3.10
All the above
Sand stone is
Sedimentary rock
Metamorphic rock
Igneous rock
Volcanic rock
Galvanising means covering iron with a thin coat of
Tin
Zinc
Glaze
Coal tar
For melting one tonne of cast iron
700 m3 air is required
20 kg limestone is required
One quintal coke is required
All the above