The iron ore mostly used for the production of pig iron is
Hematite
Siderite
Limonite
Magnetite
Which amongst the following is not the iron ore used in the production of pig iron?
Hematite
Magnetite
Sphalerite
Siderite
The product from blast furnace is called
Cast iron
Wrought iron
Pig iron
Steel
Pig iron may be basic or acidic depending upon its
Sulphur
Phosphorus
Silicon
Slag content
The lime stone is added in blast furnace to flux
Carbon
Sulphur
Silicon oxide
Magnesium oxide
The slag from the blast furnace consists of
Calcium and ferrous silicates
Aluminium and ferrous silicates
Calcium and aluminium
Calcium, aluminium and ferrous silicates
The cupola is used to make
Pig iron
Cast iron
Wrought iron
Steel
The percentage of carbon in cast iron usually varies between
0.1 to 0.2%
0.5 to 1.0%
1.0 to 1.5%
2.5 to 3.5%
Cast iron is
Tough
Wear resistant
Ductile
Resilient
Presence of sulphur imparts the following characteristic/ characteristics to cast iron_______
Hardness and brittleness
Malleability
Softness and easy mach inability
Fluidity
Silicon in cast iron________
Makes the castings unsound
Promotes the formation graphite
Aids fusibility and fluidity
Makes the iron soft and easily mach-in-able
For wire drawing operation, the work material should be
Ductile
Tough
Malleable
Resilient
Pick up the material with highest ductility
Lead
Gold
Copper
Tin
Malleability of a material helps it
To be cold worked
To withstand deformation under shear
To withstand compression stresses
To undergo permanent deformation under compression
Hardness of a material represents its resistance to
Machining
Wear
Scratching
Local penetration
Any of the above
Identify the hardest metal_______
Iron
Platinum
Tungsten
Diamond
Iron has the unique characteristic of being
Dielectric
Paramagnetic
Ferromagnetic
Ferro electric