For a good building stone, its specific gravity should the greater than
1.5
1.7
2.2
2.7
Correct Answer :
D. 2.7
Related Questions
The most fire resistant paints are:
Enamel paints
Aluminium paints
Asbestos paints
Cement paints
The percentage of alumina and silica in good fire clay vary respectively is
25, 75
30, 70
35, 65
All of these
The age of a tree can be known by examining
Cambium layer
Annular rings
Medullary rays
Heart wood
The kiln which may work throughout the year, is
Clamp
Bull's kiln
Hoffman's kiln
None of these
Glazing of clay products, is done
To improve their appearance
To protect them from atmospheric effect
To protect them from corrosive action
All the above
Wrought iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than
7 MPa
11.5 MPa
16 MPa
21 MPa
Pick up the correct statement from the following:
Bull's trench kiln a trench excavated in ground
Hoffman's kiln is constructed over ground
Tunnel Kiln is constructed as a tunnel
All the above
Pick up the correct statement from the following:
Acid test is done to find out the weathering quality of stones
Attrition test is done to find out the rate of wear of stones which are used in road construction
Crushing test is done to find out the compressive strength of the stone
All the above
The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is
1
2
3
4
The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner are known as
Knots
Rindgalls
Burls
None of these
The rocks formed by gradual deposition, are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Plywood is made from
Common timber
Bamboo fibre
Teak wood only
Asbestos sheets
Duco is one of the patent forms of
Emulsion paints
Plastic paints
Bituminous paints
Cellulose paints
The term frog means
An apparatus to lift the stone
A depression on a face of brick
Vertical joint in a brick work
Soaking brick in water
The commonly used base for iron and steel work, is
Red lead
Zinc white
White lead
Titanium white
Bulking of sand is caused due to
Surface moisture
Air voids
Viscosity
Clay contents
Pick up the correct statement from the following:
The percentage of absorption for firebricks varies from 5 to 10
The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
All the above
Bessemer process is used for the manufacture of
Pig iron
Cast iron
Wrought iron
Steel
Sandstone is a (i) Sedimentary rock (ii) Aqueous rock (iii) Siliceous rock The correct answer is
Only (i)
Both (i) and (ii)
Both (i) and (iii)
All (i), (ii) and (iii)
Formula for quick lime, is
CaCO3
Ca(OH)2
CO3CO2
None to these
To give a brilliant finish, the type of varnish used, is
Water varnish
Spirit varnish
Turpentine varnish
Oil varnish
Turpentine oil is used in paints as
Thinner
Vehicle
Base
Drier
Second class bricks
Are of dark brown colour
Produce a metallic sound when struck
Are well burnt
Are under burnt
Which of the following timbers is suitable for making sports goods?
Mulberry
Mahogany
Sal
Deodar
Stones used for the construction of retaining walls must be
Soft
Hard
Light
Heavy
Quick lime is (i) Slow in setting (ii) Rapid in slacking (iii) Good in strength The correct answer is
Only (i)
Only (ii)
Both (i) and (ii)
Both (ii) and (iii)
The plywood
Has good strength along the panel only
Can be spilt in the plane of the panel
Has greater impact resistance to blows than ordinary wood
Cannot be bent more easily than ordinary wood of same thickness
Pug mill is used for
Preparation of clay
Moulding of clay
Drying of bricks
Burning of bricks
The most important constituent of varnish, is
Drier
Solvent
Resin
All the above