A. 770°C
B. 910°C
C. 1440°C
D. 1539°C
E. none of the above
Related Mcqs:
- The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is _______________?
A. 770°C
B. 910°C
C. 1050°C
D. below recrystallisation temperature
E. above recrystallization temperature - The crystal structure of gamma iron is_________________?
A. body centred cubic
B. face centred cubic
C. hexagonal close packed
D. cubic structure
E. orthorhombic crystal - 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
E. none of the above - The crystal of alpha iron is ____________________?
A. body centred cubic
B. face centred cubic
C. hexagonal close packed
D. cubic structure
E. orthorhombic crystal - Ferromagnetic alpha iron exists in temperature range of________________?
A. below 723°C
B. 770 – 910°C
C. 910-1440°C
D. 1400-1539°C
E. above 1539°C - 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
E. surface finish - Which of the following is mostly used used as blast furnace fuel for extracting pig iron from iron ores?
A. Brown coal
B. Anthracite coal
C. Hard coke
D. Woodchar coalSubmitted by: Faheem Zaman Dhaunroo
- Hard coke is produced by carborisation of coal at_______________?
A. atmospheric temperature
B. 500-600°C
C. 70O-850°C
D. 95O-1100°C
E. 120O-1500°C - 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
E. none of the above - Melting point of iron is__________________?
A. 1539°C
B. 1601°C
C. 1489°C
D. 1712°C
E. 1131°C
