A. paramagnetic
B. ferromagnetic
C. ferroelectric
D. dielectric
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 - 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 - Paramagnetic alpha iron changes to gamma iron at_______________?
A. 770°C
B. 910°C
C. 1440°C
D. 1539°C
E. none of the above - 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
- The crystal of alpha iron is ____________________?
A. body centred cubic
B. face centred cubic
C. hexagonal close packed
D. cubic structure
E. orthorhombic crystal - For the allotropic forms of iron, the points of arrest are __________________?
A. the points where no further change oc-curs
B. constant for all metals
C. the points where there is no further flow of metal
D. the points of discontinuity
E. the points where major changes take place - 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
E. none of the above is true - 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
E. iron scrap - 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 - Melting point of iron is__________________?
A. 1539°C
B. 1601°C
C. 1489°C
D. 1712°C
E. 1131°C
