Hardness of steel depends on_________________?

A. Amount of carbon it contains
B. The shape and distribution of the car-bides in iron
C. Method of fabrication
D. Contents of alloying elements

Steel contains____________________?

A. 80% or more iron
B. 50% or more iron
C. Alloying elements like chromium, tungsten nickel and copper
D. Elements like phosphorus, sulphur and silicon in varying quantities

Annealing of white cast iron results in production of_________________?

A. Malleable iron
B. Nodular iron
C. Spheroidal iron
D. Grey iron

White cast iron contains carbon in the form of__________________?

A. Free carbon
B. Graphite
C. Cementite
D. White carbon

An important property of high silicon (12 – 18%) cast iron is the high__________________?

A. tenacity
B. brittleness
C. plasticity
D. corrosion resistance

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

Sulphur in pig iron tends to make it___________________?

A. Hard’
B. Soft
C. Ductile
D. Tough

Iron is ____________________?

A. Paramagnetic
B. Ferromagnetic
C. Ferroelectric
D. Dielectric

In malleable iron, carbon is present in the form of___________________?

A. cementite
B. free carbon
C. flakes
D. spheroids

The following types of materials are usually the most ductile__________________?

A. Face-centred cubic lattice
B. Body-centred cubic lattice
C. Hexagonal close-packed lattice
D. All of the above