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
Correct Answer :
D. All the above
Related Questions
Pick up the hypabyssal rock from the following:
Granite
Dolerite
Basalt
All the above
Pick up the correct statement from the following:
Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
Cracked paints may be cured by removing paint and giving a fresh coat of paint
Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
All the above
Paints with white lead base are suitable for painting of
Wood work
Iron work
Both wood work and iron work
None of the above
During smelting process, the combination of fuel in the furnace
Forms carbon dioxide
Carbon dioxide with carbon forms carbon mono-oxide
Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2
All the above
Lacquer paints
Are generally applied on structural steel
Are less durable as compared to enamel paints
Consist of resin and nitro-cellulose
All the above
The portion of a brick cut to form angles other than right angles in plan, is known as
Queen closer
King closer
Closer
Squint brick
The cement becomes unsound by the presence of excess
Sulphur
Magnesia
Lime
All of these
Portland pozzolana cement possesses
Higher resistance to chemical attack
Lower heat of hydration
Lower shrinkage on drying
All the above
The fire clay contains pure
Lime
Oxide of iron
Hydrated aluminium silicate
Magnesium
For light and ornamental casting, the most unsuitable pig iron, is
Bessemer pig
Grey or foundry pig
White or forge pig
Mottled pig
Good quality cement contains higher percentage of
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Smith's test of stones is performed to find out
The presence of soluble matter of stone
The compressive strength of the stone
The hardness of the stone
The toughness of the stone
Bessemer process is used for the manufacture of
Pig iron
Cast iron
Wrought iron
Steel
The slump recommended for mass concrete is about
25 mm to 50 mm
50 mm to 100 mm
100 mm to 125 mm
125 mm to 150 mm
Lime stone is not a
Sedimentary rock
Stratified rock
Aqueous rock
Metamorphic rock
The age of a tree can be known by examining
Cambium layer
Annular rings
Medullary rays
Heart wood
Bitumen paints offer
Pleasing surface
Hard surface
Smooth surface
Protective surface
The rocks formed from molten magma, are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Pick up the correct statement from the following:
Corrugated sheet iron is made by passing plain sheets between grooved rollers
Strength and stiffness of corrugated sheets are considerably increased
Corrugated sheets are generally used on slanting roofs
All the above
The thermosetting plastic
Becomes rigid when moulded at suitable pressure and temperature
At 127°C to 177°C permanently set and further application of heat does not soften it
Chars at 343°C
All the above
If the ore impurities is
Clay, lime stone is used as flux
Lime stone, clay is used as flux
Quartz, lime stone and argillaceous iron ores are used as flux
All the above
A good quality stone absorbs water less than
5 %
10 %
15 %
25 %
Duco paints are
Plastic paints
Cellulose paints
Emulsion paints
Oil paints
Softer variety of steel may be obtained by
Cementation process
Crucible process
Bessemer process
Open hearth process
The coefficient of hardness of stones used in road work should be greater than
10
12
15
17
The commonly used thinner in oil paints, is
Naphtha
Turpentine
Both (a) and (b)
None the these
Shingle is
Decomposed laterite
Crushed granite
Water bound pebbles
Air weathered rock
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
The slenderness ratio for masonry walls should not be more than
10
20
30
40
The hardest rock is
Marble
Diamond
Talc
Quartz