Lime stones are generally known as
Aqueous rocks
Sedimentary rocks
Stratified rocks
All the above
Correct Answer :
D. All the above
Related Questions
The most commonly used retarder in cement is
Gypsum
Calcium chloride
Calcium carbonate
None of the above
Pick up the correct statement from the following:
The plywoods do not split or crack due to changes in atmosphere
The commercial plywoods are available upto 150 cm wide and upto 300 cm long
The plywoods possess uniform tensile strength in all directions
All the above
In stone masonry, stones (stratified rocks) are so placed that the direction of pressure to the plane of bedding is
Right angles
45°
60°
Parallel
In paints, the pigment is responsible for
Durability
Colour
Smoothness
Glassy face
A bull nose brick is not used for
Rounding off sharp corners
Pillars
Decoration purpose
Arches
The coefficient of hardness of stones used in road work should be greater than
10
12
15
17
A good quality stone absorbs water less than
5 %
10 %
15 %
25 %
French polish is
Oil paint
Distemper
Spirit varnish
None to these
Refractory bricks are used for
Retaining walls
Columns
Piers
Combustion chambers
Which of the following bricks are used for lining of furnaces?
Over-burnt bricks
Under-burnt bricks
Refractory bricks
First class bricks
Glazing is used to make earthenware
Hard
Soft
Porous
Impervious
Galvanising means covering iron with a thin coat of
Tin
Zinc
Glaze
Coal tar
Quartzite is a
Metamorphic rock
Argillaceous rock
Calcareous rock
Siliceous rock
Bitumen completely dissolves in
Carbon bisulphide
Chloroform
Coal tar
All of these
Mastic asphalt is normally used for
Sound insulation
Water proofing
Fire proofing
None to these
The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as
Cementation process
Crucible process
Bessemer process
Open hearth process
Dextrin is
Animal glue
Starch glue
Albumin glue
Rubber based adhesive
Porcelain is used as:
Sanitary wares
Electric insulators
Storage vessels
Reactor chambers
The normal consistency of ordinary Portland cement is about
10 %
20 %
30 %
40 %
The minimum compressive strength of 1st class bricks should be
75 kg/cm2
90 kg/cm2
100 kg/cm2
120 kg/cm2
The constituent of cement which is responsible for all the undesirable properties of cement is
Di-calcium silicate
Tri-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Bituminous fells are used for
Covering A.C. sheets
Covering sloping roofs
D.P.C.
None to these
The main constituent of cement which is responsible for initial setting of cement is
Di-calcium silicate
Tri-calcium silicate
Tri-calcium aluminate
All of the above
The wedging is adopted for quarrying costly stratified rock such as
Laterite
Marble
Limestone
All the above
For testing compressive strength of cement, the size of cube used is
50 mm
70.6 mm
100 mm
150 mm
Which one of the following polymers is obtained from condensation polymerization?
Phenol formaldehyde
Carbamide
Melamine-formaldehyde
All of these
The age of a tree can be known by examining
Cambium layer
Annular rings
Medullary rays
Heart wood
Pick up the correct statement from the following:
Rusting is caused due to combined action of air, moisture and carbon dioxide
During rusting, first ferrous bicarbonates are formed
On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
All the above
Plastic asphalt is
Used as a water proofing layer over roof
A mixture of cement and asphalt
A natural asphalt
A refinery product
Based on its dry weight, a freshly felled tree may contain water
25 %
50 %
75 %
100 %