ENGINEERING MATERIALS QUIZ

0.45 to 0.55%

0.20 to 0.45%

0.55 to 1.0%

0.05 to 0.20%

Cooling is done slowly and steadily

Internal stresses are relieved

All of these

Steels are heated to 500 to 700°C

Whiteheart cast iron

None of these

Blackheart cast iron

Both (A) and (B)

Wholly pearlite

Wholly austenite

Pearlite and ferrite

Pearlite and cementite

Bessemer converter

Blast furnace

Cupola

Open hearth furnace

Induce stresses

Refine grain structure

Improve mechanical properties

Reduce segregation in casting

0.005

0.008

0.002

0.01

MgO

Steel

SiO2

Al2O3

Monel metal

Constantan

Nichrome

Delta metal

Recrystallization

Heat treatment

Allotropic change

Precipitation