According to ISI, bitumen is classified into
2 grades
4 grades
8 grades
10 grades
Correct Answer :
D. 10 grades
Related Questions
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
The minimum percentage of silica, alumina and ferric oxide in lime for white washing, is
20
15
5
0
Dorry's testing machine is used for
Crushing test of stone
Hardness test of stone
Impact test of stone
Water absorption test
Fibre boards can be
Distempered
Painted
Painted and distempered
Used for furniture
Geologically, marble is known as
Sedimentary rock
Igneous rock
Metamorphic rock
Stratified rock
If water required for 1 bag of cement is 30 litres, the water cement ratio is:
0.40
0.50
0.60
None of these
Spirit varnish generally consists of
Oil, wax and resin
Alcohol, wax and turpentine
Pigment and synthetic resin
Spirit and shellac
A badly mixed cement concrete results in
Segregation
Bleeding
Honey combing
None of these
The softest rock is
Marble
Diamond
Talc
Quartz
Bitumen felt
Is used as water proofing material
Is used as damp proofing material
Is made from bitumen and hessian fibres
All the above
A bull nose brick is not used for
Rounding off sharp corners
Pillars
Decoration purpose
Arches
Knots in timber are
Defects caused by crushing fibres
Splits radiating from the centre
Speckled strains
Signs of branches cut off
Asphalt is obtained from
Petroleum distillation
Bitumen distillation
Plastic distillation
None of these
The rocks formed from molten magma, are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Ultimate strength to cement is provided by
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Plastic asphalt is
Used as a water proofing layer over roof
A mixture of cement and asphalt
A natural asphalt
A refinery product
Pick up the plutonic rock from the following:
Granite
Dolerite
Basalt
All the above
The wedging is adopted for quarrying costly stratified rock such as
Laterite
Marble
Limestone
All the above
Slate is formed by metamorphic action on
Shale
Lime stone
Sand stone
Granite
Which of the following is a mineral?
Basalt
Granite
Quartz
Syenite
Stones used for ornamental work must be
Soft
Hard
Light
Heavy
Jumper is a tool used for
Testing of stones
Quarrying of stones
Dressing of stones
None of the above
Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as
Quick setting cement
Rapid hardening cement
White cement
Low heat Portland cement
Pick up the correct statement from the following:
Solder material is an alloy which melts at a temperature above 400°C
Brazing is done at temperature above 600°C to 1100°C
Brazing joint is stronger than the solder joint
All the above
The main constituent which imparts hydraulicity to hydraulic lime is
Calcium oxide
Silica
Clay
Water
The lime which contains high percentage of calcium oxide, is generally called
Fat lime
Rich lime
White lime
None of these
A mortar joint in masonry which is normal to the face of wall is known as
Bed joint
Wall joint
Cross joint
Bonded joint
Veneering means
Carving out designs on timber planks
Chemically treating timber planks
Thick layer of superior wood glued to inferior wood
Thin layer of superior wood glued to inferior wood
The steel used in R.C.C. work is
Stainless steel
Mild steel
High carbon steel
Wrought iron
The rocks which are formed due to pouring of magma at the earth's surface are called
Plutonic rocks
Hypabyssal rocks
Volcanic rocks
Igneous rocks