Geologically, marble is known as
Sedimentary rock
Igneous rock
Metamorphic rock
Stratified rock
Correct Answer :
C. Metamorphic rock
Related Questions
Iron ore may contain
Carbon
Silicon
Phosphorus and manganese
All the above
The most common admixture which is used to accelerate the initial set of concrete is
Gypsum
Calcium chloride
Calcium carbonate
None of the above
The main constituent which imparts hydraulicity to hydraulic lime is
Calcium oxide
Silica
Clay
Water
Sapwood consists of
Innermost annular rings around the pith
Portion of timber between heartwood and cambium layer
Thin layers below the bark
Thin fibre which extends from the pith outwards and holds the annular rings together
Bitumen felt
Is used as water proofing material
Is used as damp proofing material
Is made from bitumen and hessian fibres
All the above
Gneiss is obtained from
Igneous rocks
Metamorphic rocks
Sedimentary rocks
Sedimentary metamorphic rocks
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
Which of the following gradients exerts maximum influence on properties of steel?
Iron
Carbon
Manganese
Sulphur
Chemically, marble is known as
Metamorphic rock
Argillaceous rock
Calcareous rock
Siliceous rock
Pick up the incorrect statement from the following:
Plastics are chemical resistant
Plastics are durable
Plastics are ductile
Plastics are excellent electric insulators
Second class bricks
Are of dark brown colour
Produce a metallic sound when struck
Are well burnt
Are under burnt
Seasoning is
A process of removing sap
Creosoting
Painting with sodium silicate
Coating with tar
Which one of the following is used for preparing porcelain?
Clay
Feldspar
Quartz
All of these
The lime which contains high percentage of calcium oxide, is generally called
Fat lime
Rich lime
White lime
None of these
Cast iron
Is obtained by purifying pig iron
Is manufactured in required shapes
May contain 2 to 5 per cent of carbon with other impurities
All the above
The commonly used drying oil for oil paints, is
Olive oil
Linseed oil
Kerosene oil
Acetate of lead
The method of addition polymerization is used for obtaining:
Polystyrene
Polypropylene
Polyvinylchloride
All of these
Softer variety of steel may be obtained by
Cementation process
Crucible process
Bessemer process
Open hearth process
As per IS specifications, the maximum final setting time for ordinary Portland cement should be
30 minutes
1 hour
6 hours
10 hours
The kiln which may work throughout the year, is
Clamp
Bull's kiln
Hoffman's kiln
None of these
The operation of removal of impurities or clay adhering to iron ores, is known as
Dressing
Calcination
Roasting
Smelting
A ferrous metal is
Cast iron
Wrought iron
Steel
All the above
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
Slate is formed by metamorphic action on
Shale
Lime stone
Sand stone
Granite
The practical limit of moisture content achieved in air drying of timber is
5 %
15 %
25 %
35 %
The most important tool in brick laying for lifting and spreading mortar and for forming joints is
Trowel
Square
Bolster
Scutch
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
Wrought iron contains carbon upto
0.25 %
1.0 %
1.5 %
2 %
Pick up the correct statement from the following:
Plastics have generally low melting point
The coefficient of thermal expansion of plastics is about three times than that of steel
The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67
All the above
Which one of the following is acid resistant asbestos?
Actinolite asbestos
Amosite asbestos
Anthophylite asbestos
All the above