Wrought iron is________________?

A. Hard
B. High in strength
C. Highly resistant to corrosion
D. Heat treated to change its properties

A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as_________________?

A. Allotropic change
B. Recrystallisation
C. Heat treatment
D. Precipitation

Pick up wrong statement about wrought iron ?

A. it contains carbon of the order of 0 to 0.25%
B. it melts at 1535°c
C. it is very soft and ductile
D. it can be easily forge welded

Cast iron has_________________?

A. High tensile strength
B. Its elastic limit close to the ultimate breaking strength
C. High ductility
D. All of the above

In mottled cast iron, carbon is available in__________________?

A. free form
B. combined form
C. nodular form
D. flat form

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

Carbon steel is_______________?

A. Made by adding carbon in steel
B. Refined from cast iron
C. An alloy of iron and carbon with varying quantities of phosphorus and sulphur
D. Extensively used for making cutting tools

‘Killed steels’ are those steels__________________?

A. Which are destroyed by burning
B. Which after their destruction are recycled to produce fresh steel
C. Which are deoxidised in the ladle with silicon and aluminium
D. In which carbon is completely burnt

The most effective inhibitor of grain growth, when added in small quantities is__________________?

A. Carbon
B. Vanadium
C. Manganese
D. Cobalt

Corrosion resistance of steel is increased by addition of________________?

A. Chromium and nickel
B. Sulphur, phosphorus, lead
C. Vanadium, aluminium
D. Tungsten, molybdenum, vanadium, chromium