Related Questions

Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.
A Manganese
B Phosphorous
C Magnesium
D Chromium
Nodular iron has
A High machinability
B Low melting point
C High tensile strength
D All of the above
In nodular iron, graphite is in the form of
A Cementite
B Free carbon
C Flakes
D Spheroids
__________ iron is produced, when molten pig iron is allowed to cool gradually.
A White cast
B Grey cast
C Wrought
D None of these
__________ iron is produced, when molten pig iron is chilled suddenly.
A White cast
B Grey cast
C Wrought
D None of these
When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.
A Cementite
B Free graphite
C Both A and B
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
Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?
A Silicon
B Sulphur
C Manganese
D Phosphorus
When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces
A White cast iron
B Nodular cast iron
C Malleable cast iron
D Alloy cast iron
White cast iron as compared to grey cast iron is
A More durable
B Very brittle
C Very hard
D All of the above

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