Related Questions

When carbon in the cast iron is principally in the form of graphite, the cast iron will be of
A Brown colour
B Yellow colour
C White colour
D Grey colour
Nodular cast iron is produced by adding ________ to the molten cast iron.
A Nickel
B Chromium
C Copper
D Magnesium
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
White cast iron as compared to grey cast iron is
A More durable
B Very brittle
C Very hard
D All of the above
An important property of malleable cast iron in comparison to grey cast iron is the high
A Compressive strength
B Ductility
C Carbon content
D Hardness
__________ of grey cast iron produces white cast iron.
A Tempering
B Rapid heating
C Rapid cooling
D Slow cooling
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
Which of the following impurity in cast iron makes it hard and brittle?
A Silicon
B Sulphur
C Manganese
D Phosphorus
With increase in carbide/graphite ratio in cast iron, its
A Hardness & brittleness increases
B Ductility decreases
C Both A & B
D Neither A nor B
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

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