Related Questions

__________ iron is produced, when molten pig iron is allowed to cool gradually.
A White cast
B Grey cast
C Wrought
D None of these
Dephosphorisation of molten pig iron is favoured by
A oxidising and basic slag
B reducing and basic slag
C high activity co-efficient of phosphorous in metal
D oxidising and neutral slag
Pig iron is produced by blast furnaces in India using mostly the iron ore named
A Hematite
B Magnetite
C Siderite
D Chalcopyrite
Nodular cast iron is produced by adding ________ to the molten cast iron.
A Nickel
B Chromium
C Copper
D Magnesium
Chilled cast iron has
A No graphite
B A very high percentage of graphite
C A low percentage of graphite
D Graphite as its basic constituent of composition
Chilled iron castings are
A Easily machinable
B Soft on surface
C Highly wear resistant
D None of these
The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth's early life and solidified into hard rock's called
A granite
B basalt
C igneous rocks
D sedimentary rocks
The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.
A 0.2
B 2
C 4
D 8
If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called
A Bessemer pig
B Grey or foundry pig
C White or forge pig
D Mottled pig
They treated me - I were a chilled
A when
B like
C as
D as if

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