Related Questions

__________ is used as a flux in the smelting of copper ore like chalcopyrite.
A Coke breeze
B Lime powder
C Silica/quartz
D Dolomite
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
A liquation
B leaching
C levigation
D magnetic separation
Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
A Cresylic acid
B Xanthaies
C Pine oil
D All of the above
Ore concentration by froth floatation utilises the __________ of ore particles.
A Density difference
B Wetting characteristics
C Terminal velocities
D None of these
Leaching of uranium ore and gold ore is done in
A Centrifugal extractor
B Pachuka tanks
C Bollman extractor
D None of these
Which is the main reducing agent during production of iron from iron ore in a blast furnace?
A C
B CO
C CO2
D H2
The main ore of uranium is
A pitchblende
B monazite sand
C cassiterite
D chalcopyrite
The main ore of thorium is
A pitchblende
B monazite
C limonite
D galena
Which of the following is the main ore for aluminium?
A Calcite
B Bauxite
C Magnesite
D Limonite
When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as ________ double cover butt joint.
A Single riveted
B Double riveted
C Multi riveted
D None of these

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