Pegmatite is a/an
Intrusive igneous rock
Extrusive igneous rock
Sedimentary rock
Metamorphic rock
Correct Answer :
A. Intrusive igneous rock
Related Questions
The steel used for the manufacture of rails, is
Bessemer steel
Mild steel
Cast steel
Stainless steel
The frog of the brick in a brick masonry is generally kept on
Bottom face
Top face
Shorter side
Longer side
Mastic asphalt is
Water proof
Fire proof
Elastic
All the above
Which of the following sedimentary rocks changes into quartzite by metamorphic action?
Sand stone
Lime stone
Shale
Gypsum
The sequence of refractory materials according to increasing melting points is:
Dolomite, Magnesia, Bauxite, Chromites
Bauxite, Chromites, Dolomite, Magnesia
Magnesia, Bauxite, Dolomite, Chromites
None of these
Seasoning of timber is essential to remove
Knots from timber
Sap from timber
Twisted fibre from timber
Roughness of timber
For the manufacture of Portland cement, the proportions of raw materials used, are
Lime 63% ; silica 22% ; other ingredients 15%
Lime 22% ; silica 63% ; other ingredients 15%
Silica 40% ; lime 40% ; other ingredients 20%
Silica 70% ; lime 20% ; other ingredients 10%
Which of the following is the purest form of iron?
Cast iron
Wrought iron
Mild steel
High carbon steel
Based on its dry weight, a freshly felled tree may contain water
25 %
50 %
75 %
100 %
Glazing is used to make earthenware
Hard
Soft
Porous
Impervious
Pick up the correct statement from the following:
The free quartz suddenly expands at a temperature lower than 600°C
The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2
The sand stone with silicates resist a fire in a better way
All the above
Sea sand used in structures causes
Dampness
Efflorescence
Disintegration
All of these
The timber having maximum resistance against white ants, is obtained from
Chir
Shishum
Sal
Teak
Pick up the correct statement from the following:
The heating of a material to redness in contact with air, is known as calcination
The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting
The product that remains after calcination of limestone, is called lime
All the above
Seasoning of timber is done
To make it water proof
To paint its surface
To increase its temperature
To remove water
Calcination of iron ores is done
To remove moisture
To remove carbonic acid
By roasting in heaps
All the above
Refractory bricks are used for
Retaining walls
Columns
Piers
Combustion chambers
The most valuable timber may be obtained from
Chir
Shishum
Sal
Teak
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
Distemper is
A paint consisting of powdered chalk, pigments and water
A water proofing agent
A paint consisting of coloured cement and water
A drying agent
Pick up the correct statement from the following:
The low voltage porcelain is prepared by wet process
The high voltage porcelain is prepared by dry process
The low voltage porcelain is prepared by dry process
None of the above
In a mortar, the binding material is
Cement
Sand
Surkhi
Cinder
French polish is
Oil paint
Distemper
Spirit varnish
None to these
Percentage of silica in a good brick earth lies between
5 to 10 %
20 to 30 %
50 to 60 %
70 to 80 %
First class timber has an average life of
Less than one year
1 to 5 years
5 to 10 years
More than 10 years
Pick up the compound responsible for early strength of cement from the following:
Tetra-calcium alumino-ferrite
Tri-calcium silicate
Tri-calcium aluminate
Di-calcium silicate
The compound of Portland cement which reacts immediately with water and also sets first is
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called
Plutonic rocks
Hypabyssal rocks
Volcanic rocks
Igneous rocks
Plywood has the advantage of
Greater tensile strength in longer direction
Greater tensile strength in shorter direction
Same tensile strength in all directions
None of the above
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