Related Questions

The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by
A Electrolysis
B Electrolytic reduction
C Electrolytic oxidation
D None of these
If Carbon: Diamond then Corundum: .......?
A Garnet
B Pearl
C Ruby
D Sapphire
Carbon: Diamond:: corundum:?
A Garnet
B Pukhray
C Ruby
D Pearl
If carbon : Diamond then Corundum: ---?
A Garnet
B Pearl
C Ruby
D Sapphire
An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is
A Cutting speed
B Feed rate
C Shear angle
D Tool geometry
Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as
A Bessemer pig
B Grey or foundry pig
C White or forge pig
D Mottled pig
Department ores range form two to nine floors in height. If a store has more than three floors , it has a lift. If he statements above are true, which of the following must also be true?
A Second floors do not have lifts
B Fourth floors have lifts
C Only floors above third floor have lifts
D All floors may be reached by lifts
Which of the following ores contains maximum percentage of uranium?
A Rescolite
B Thorium
C Pitchblende
D Carnotite
Among the following iron ores, the highest percentage of iron content is found in–
A Haemetite
B Magnetite
C Limnonite
D None of these
Pig iron is manufactured from the ores by
A Dressing
B Calcination and roasting
C Smelting
D All the above

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