The most important constituent of varnish, is
Drier
Solvent
Resin
All the above
Correct Answer :
D. All the above
Related Questions
The most important constituent of an oil paint, is
Thinner
Vehicle
Pigment
All the above
Varnish is a transparent or semi-transparent solution of resinous substances in
Alcohol
Linseed
Turpentine
All the above
Chlorite, a green colour mineral is mainly derived from the decomposition of
Augite
Biotite
Hornblende
All of these
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
Pick up the incorrect statement from the following:
Hydraulic lime is generally obtained by burning kankar
Hydraulic lime sets slowly as compared to fat lime
Hydraulic lime is generally used in lime mortar
None of these
The normal consistency of ordinary Portland cement is about
10 %
20 %
30 %
40 %
Excess of alumina in brick earth makes the brick
Impermeable
Brittle and weak
To lose cohesion
To crack and warp on drying
For slaking of 10 kg of CaO, the theoretical amount of water is
2.2 kg
1.5 kg
3.2 kg
None of these
Based on its dry weight, a freshly felled tree may contain water
25 %
50 %
75 %
100 %
Quick setting cement is produced by adding
Less amount of gypsum in very fine powdered form
More amount of gypsum in very fine powdered form
Aluminium sulphate in very fine powdered form
Pozzolana in very fine powdered form
As per IS specifications, the maximum final setting time for ordinary Portland cement should be
30 minutes
1 hour
6 hours
10 hours
Duco paints are
Plastic paints
Cellulose paints
Emulsion paints
Oil paints
Blister steel
Is obtained by cementation process
Is full of fissures and cavities
Can be easily welded
All the above
Cross cut saw is used for
Cutting soft stones
Cutting hard stones
Cutting large blocks of stones
Dressing stones
Which of the following gradients exerts maximum influence on properties of steel?
Iron
Carbon
Manganese
Sulphur
The main function of alumina in brick earth is
To impart plasticity
To make the brick durable
To prevent shrinkage
To make the brick impermeable
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
The vehicle used in case of enamel paints is usually
Linseed oil
Water
Varnish
None of the above
The stretcher bond in brick masonry can be used only when the thickness of wall is
90 mm
180 mm
190 mm
280 mm
A ferrous metal is
Cast iron
Wrought iron
Steel
All the above
Pick up the correct statement from the following:
Steel produced by open hearth process is milder than that obtained by the Bessemer process
Engineers prefer open hearth steel for structural purpose as it is more homogenous
Basic Bessemer process is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel
All the above
Which of the following ingredients of the brick earth enables the brick to retain its shape?
Alumina
Silica
Iron
Magnesia
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
The timber having maximum resistance against white ants, is obtained from
Chir
Shishum
Sal
Teak
Dorry's testing machine is used for
Crushing test of stone
Hardness test of stone
Impact test of stone
Water absorption test
Fibre glass
Retains heat-longer
Has a higher strength to weight ratio
Is shock proof and fire retardant
All the above
Mastic asphalt is
Acid resisting material
Non-corrosive material
Corrosive material
Heating-resisting material
Quick lime
Generates heat when added to water
Reacts with carbon dioxide
May be used for white-washing
All the above
Elastomers can extend upto
Five times their original dimensions
Seven times their original dimensions
Ten times their original dimensions
Three times their original dimensions
Hydraulic lime is obtained by
Burning of lime stone
Burning of kankar
Adding water to quick lime
Calcination of pure clay