xiv) Austenitic stainless steel is prepared in

(a) AOD Converter

(b) OBM converter

(c) Ladle furnace

(d) Open hearth furnace

xv) Mould oscillation is used in continuous casting of steel

(a) To heal cracks formed on the surface of the casting

(b) To obtain good mixing of liquid inside the mould

(c) To float out inclusions

(d) To avoid rhomboidity of steel

7) State true or false


a) The viscosity of slag increase with decreasing basicity of slag

b) The rail steel is produced in Bhilai steel plant

c) Complete solidification of the slag occur in the continuous casting mould

d) Fireclay bricks are not resistant to attack by iron oxide

e) Calcium is a weak alumina inclusion modifier

f) Inclusion engineering involves removal of inclusions from steels

g) It is desirable to have martensite in steel for toughness

h) Springback phenomenon is associated with the hot working of steel

i) In electric steelmaking foaming of slag is desirable

j) Rimming reaction in steel is due to evolution of hydrogen during solidification.