Gamma iron exits at following temperature___________________?

A. Room temperature
B. Near melting point
C. Between 1400°c and 1539°c
D. Between 910°c and 1400°c

Pure iron is the structure of_______________?

A. Ferrite
B. Pearlite
C. Anstenite
D. Ferrite and cementite

The molecules in a solid move______________?

A. In a random manner
B. In a haphazard way
C. In circular motion
D. Back and forth like tiny pendulums

Cast iron is characterised by minimum of following %age of carbon_________________?

A. 0.2%
B. 0.8%
C. 1.3%
D. 2%

Paramagnetic alpha iron changes to gamma iron at_______________?

A. 770°c
B. 910°c
C. 1440°c
D. 1539°c

The metallic structure of mild steel is_________________?

A. Body centred cubic
B. Face centred cubic
C. Hexagonal close packed
D. Cubic structure

The crystal structure of gamma iron is_________________?

A. Body centred cubic
B. Face centred cubic
C. Hexagonal close packed
D. Cubic structure

The percentage of carbon in pig iron varies from___________________?

A. 0.1 to 1.2%
B. 1.5 to 2.5%
C. 2.5 to 4%
D. 4 to 4.5%

Pig iron is the name given to________________?

A. Raw material for blast furnace
B. Product of blast furnace made by reduction of iron ore
C. Iron containing huge quantities of carbon
D. Iron in molten form in the ladles

In nodular iron, graphite is in the form of_____________________?

A. Cementite
B. Free carbon
C. Flakes
D. Spheroids