Quick lime (or caustic lime)
Is obtained by the calcination of pure lime stone
Has great affinity to moisture
Is amorphous
All the above
Correct Answer :
D. All the above
Related Questions
Plastic asphalt is
Used as a water proofing layer over roof
A mixture of cement and asphalt
A natural asphalt
A refinery product
A good brick earth should contain:
About 20% to 30% of alumina
About 50% to 60% of silica
Not more than 5% of lime
All the above
Gypsum consists of
H₂S and CO₂
CaSO4 and H₂O
Lime and H₂O
CO₂ and calcium
Mastic asphalt is
Water proof
Fire proof
Elastic
All the above
Pick up the plutonic rock from the following:
Granite
Dolerite
Basalt
All the above
Mastic asphalt is
Acid resisting material
Non-corrosive material
Corrosive material
Heating-resisting material
For preparing porcelains, the clay should be
Sufficiently pure
Of high degree of tenacity
Of good plasticity
All the above
Lacquer is
Oil paint
Distemper
Spirit varnish
None to these
The percentage of alumina in a good brick earth lies between
5 to 10 %
20 to 30 %
50 to 60 %
70 to 80 %
The property by virtue of which lime sets under water, is known as
Slacking
Setting
Hydraulicity
Calcining
The rock generally used for roofing, is
Granite
Basalt
Slate
Pumice
A prime coat is given to steel work with
An oxide of iron paint
A mixture of white lead and lead paint
A special paint
Cement paint
In arches, stratified stones are placed so that their planes are
Parallel
Perpendicular
Radial
None of these
The colour of statuary marble used for sculptor's work, is
Red
Blue
White
Green
Which of the following cements is suitable for use in massive concrete structures such as large dams?
Ordinary Portland cement
Low heat cement
Rapid hardening cement
Sulphate resisting cement
Duco is one of the patent forms of
Emulsion paints
Plastic paints
Bituminous paints
Cellulose paints
For the manufacture of stainless steel, steel is mixed with
Chromium
Nickel
Tungsten
None of these
The material generally not used as extender in paints, is
Powdered silica
Gypsum
Talc
Zinc white
The melting point of silica is:
1570°C
1630°C
1730°C
1850°C
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
Refractory bricks resist
High temperature
Chemical action
Dampness
All the above
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
The slenderness ratio for masonry walls should not be more than
10
20
30
40
Plastic
Is an organic substance
Consists of natural or synthetic binders
Finished products are rigid and stable at normal temperature
All the above
Refractory bricks are used for
Retaining walls
Columns
Piers
Combustion chambers
Quick lime is
Calcium carbonate
Calcium oxide
Calcium hydroxide
None of the above
The commonly used drying oil for oil paints, is
Olive oil
Linseed oil
Kerosene oil
Acetate of lead
The steel used in R.C.C. work is
Stainless steel
Mild steel
High carbon steel
Wrought iron
Le-Chatelier's device is used for determining the
Setting time of cement
Soundness of cement
Tensile strength of cement
Compressive strength of cement
The main constituent of cement which is responsible for initial setting of cement is
Di-calcium silicate
Tri-calcium silicate
Tri-calcium aluminate
All of the above