A. high maehinability
B. low melting point
C. high tensile strength
D. good fluidity
E. all of the above
Related Mcqs:
- In nodular iron, graphite is in the form of_____________________?
A. cementite
B. free carbon
C. flakes
D. spheroids
E. nodular aggregates of graphite - 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 - The critical activity has____________________?
A. maximum float
B. minimum float
C. zero float,
D. average float
E. none of these - With increase in load, radiant super heater has____________________?
A. drooping characteristic
B. lihear characterisstic
C. rising characteristic
D. flat characteristic
E. none of the above - 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
- Points of arrest for iron correspond to__________________?
A. stages at which allotropic forms change
B. stages at which further heating does not increase temperature for some time
C. stages at which properties do not change with increase in temperature
D. there is nothing like points of arrest
E. none of the above - Wrought iron is________________?
A. hard
B. high in strength
C. highly resistant to corrosion
D. heat treated to change its properties
E. least resistant to corrosion
