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
Correct Answer :
D. All the above
Related Questions
Bituminous fells are used for
Covering A.C. sheets
Covering sloping roofs
D.P.C.
None to these
For the manufacture of stainless steel, steel is mixed with
Chromium
Nickel
Tungsten
None of these
The main ingredient of a good quality brick earth, is
Magnesia
Lime
Silica
Alumina
Priming consists of
One part of white lead, 8 parts of chalk and four parts of twice boiled linseed oil
8 parts of white lead, one part of chalk and four parts of twice boiled linseed oil
One part of white lead, 8 parts of chalk and one part of linseed oil
None to these
Pick up the incorrect statement from the following:
Plastics are chemical resistant
Plastics are durable
Plastics are ductile
Plastics are excellent electric insulators
The internal size of mould used in brick preparation is
Equal to the size of a fully burnt brick
Smaller than the size of a fully burnt brick
Greater than the size of a fully burnt brick
None of the above
The practical limit of moisture content achieved in air drying of timber is
5 %
15 %
25 %
35 %
Minimum of 40% of iron, is available in
Magnetite
Red haematite
Limonite
Black band
Cast steel is manufactured by
Cementation process
Crucible process
Bessemer process
Open hearth process
Upto a maximum of 72% of iron, is available in
Magnetite
Limonite
Siderite
Iron pyrites
The main constituent of fly-ash, is
Aluminium oxide
Silica
Ferrous oxide
All of these
Good quality sand is never obtained from
River
Lake
Sea
Gravel powder
Rapid hardening cement attains early strength due to
Larger proportion of lime grounded finer than normal cement
Lesser proportion of lime grounded coarser than normal cement
Lesser proportion of lime grounded finer than normal cement
Excess percentage of gypsum
With storage, strength of cement
Increases
Decreases
Remains the same
None to these
Bullet proof glass is made of thick glass sheet sandwiched by a layer of
Steel
Stainless steel
High test plastic
Chromium plate
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
The lime which contains high percentage of calcium oxide, is generally called
Fat lime
Rich lime
White lime
None of these
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%
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
Early attainment of strength in rapid hardening cement is mainly due to
Gypsum
Finer grinding
Tri-calcium silicate
Tri-calcium aluminate
The plastics made from cellulose resin
Are as clear as glass
Are tough and strong
Possess excellent electrical properties
All the above
The harmonious mixing of the clay ingredients, is known as
Weathering
Blending
Tempering
None of these
The colour of statuary marble used for sculptor's work, is
Red
Blue
White
Green
The stones obtained by blasting are used as
Ballast in railways
Aggregates for concrete
Road metal
All the above
A heavy stone is suitable for
Arches
Rubble masonry
Roads
Retaining walls
For a 50 kg cement bag water required, is
16.5 litres
18.5 litres
20.5 litres
22.5 litres
Cement is said to be of good quality if
Its colour is not greenish grey
One feels cool by thrusting one's hand in the cement bag
A handful of cement thrown into a bucket of water does not float
None of these
Mastic asphalt is generally used for
Damp proof course
Water proof layer
Partition walls
Both (A) and (B)
Forge pig may be converted to wrought iron by
Rolling
Pudding
Shingling
Refining
To retard the initial setting time of cement, the compound responsible, is
Tri-calcium silicate
Gypsum
Di-calcium silicate
Tri-calcium aluminate