Related Questions

Which of the following is a neutral flux used in the pyrometallurgy of metal extraction?
A Quartz
B Flourspar
C Dolomite
D Manganese ore
Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore?
A Silica
B Lime
C Alumina
D Fluorite
Which of the following is an undesirable property of slag produced during the pyrometallurgical method of metal extraction from its ore?
A High fusibility & fluidity
B High thermal conductivity
C Low density
D High chemical activity
__________ flux is used for the extraction of metal from its self fluxing ores.
A No
B Acid
C Basic
D Neutral
With increase in temperature, the rate of extraction in leaching (solid-liquid extraction system)
A Increases
B Decreases
C Remains unaffected
D Increases Linearly
In case of an under-reinforced beam, the depth of actual neutral axis is __________ that of the critical neutral axis.
A Same as
B Less than
C Greater than
D None of these
Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight
A 1.5
B 3
C 5
D 7
Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.
A 2
B 3
C 0.8
D 6
Extraction of pencillin employs a __________ extraction coloumn.
A Centrifugal
B Packed
C Plate
D None of these
If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called
A Balanced beam
B Under reinforced beam
C Over reinforced beam
D None of the above

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