The steel used for the manufacture of rails, is
Bessemer steel
Mild steel
Cast steel
Stainless steel
Correct Answer :
A. Bessemer steel
Related Questions
The plastics prepared from Vinyl resin are
Odourless
Non-toxic
Transparent
All of these
Lime putty
Is made from hydraulic lime
Is made by adding lime to water
Can be used only upto three days
All of above
Snowcrete is one of the patent forms of
Distempers
Water proof cement paints
Enamel paints
Cellulose paints
Galvanising means covering iron with a thin coat of
Tin
Zinc
Glaze
Coal tar
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
A bull nose brick is not used for
Rounding off sharp corners
Pillars
Decoration purpose
Arches
Bitumen felt is used for
Water proofing
Damp proofing
Both (A) and (B)
Neither (A) nor (B)
Pick up the synthetic resin from the following:
Urea resin
Phenolic resin
Resorcinol resin
All of these
Pick up the correct statement from the following:
The plastic bottles are made by the process of blowing
The application of thermo-setting resins on sheets of paper, is called laminating process
The plastic articles made by placing raw material in the desired moulds, is known as moulding process
All the above
Which of the following timbers is suitable for making sports goods?
Mulberry
Mahogany
Sal
Deodar
Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth?
Lime stone and alumina
Silica and alkalies
Alumina and iron
Alkalies and magnesium
Mastic asphalt is normally used for
Sound insulation
Water proofing
Fire proofing
None to these
The filler used in plastic bitumen, is
Shale powder
Talc powder
Asbestos powder
Plastic powder
The commonly used raw material in the manufacture of cement, is
Slate
Sand stone
Lime stone
Basalt
If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called
Bessemer pig
Grey or foundry pig
White or forge pig
Mottled pig
Duco paints are
Plastic paints
Cellulose paints
Emulsion paints
Oil paints
For sanitary pipes and chemical stonewares,
Salt glazing is used
Lead glazing is used
Opaque glazing is used
None of these
Permanent magnets are made of high carbon steel and
15% of cobalt
20% of cobalt
35% of cobalt
45% of cobalt
Spalling hammer is used for
Driving wooden headed chisels
Rough dressing of stones
Carving of stones
Breaking small projection of stones
The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to
Grey cast iron
White cast iron
Mottled cast iron
Toughed cast iron
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
Minimum of 40% of iron, is available in
Magnetite
Red haematite
Limonite
Black band
Oil varnish generally consists of
Synthetic resin and spirit
Oil, wax and resin
Resin, oil and turpentine
Spirit, oil and wax
Slump test for concrete is carried out, to determine
Strength
Durability
Workability
Water content
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
Bitumen paints offer
Pleasing surface
Hard surface
Smooth surface
Protective surface
The rocks in which argil (or clay) predominates, are called
Siliceous rocks
Argillaceous rocks
Calcareous rocks
Igneous rocks
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
If the iron ore contains clay as an impurity, the flux added during calcination, is
Clay
Lime stone
Argillaceous iron ore
All the above
Calcination of iron ores is done
To remove moisture
To remove carbonic acid
By roasting in heaps
All the above