A. Electrolytic reduction
B. Calcium reduction
C. Magnesium reduction
D. Thermal dissociation
Related Mcqs:
- Titanium is added to molten aluminium alloys before casting for the purpose of_____________________?
A. Grain refinement
B. Increasing corrosion resistance
C. Reducing porosity
D. Improving fluidity - Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of__________________?
A. 1 : 1
B. 1 : 2
C. 2 : 1
D. 1 : 4 - Out of the following, the joint produced by ______________ has the lowest strength?
A. Soldering
B. Welding
C. Brazing
D. Riveting - 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 - ______________________ iron is produced by the annealing of white cast iron?
A. Malleable
B. Nodular
C. Ductile
D. Grey - The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their__________________?
A. Equivalent weight
B. (Equivalent weight)2
C. Molecular weight
D. (Molecular weight)2 - Steel & cast iron pipes are produced by ______________ casting ?
A. Slush
B. Die
C. Investment
D. True centrifugal - While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about _____________ °C ?
A. 1800
B. 2000
C. 2400
D. 3000 - Common salt is produced from sea water in India generally by the ________________ method?
A. Freeze drying
B. Solar evaporation
C. Electrolytic
D. None of these - Steel produced from phosphatic iron is _______________ in nature?
A. Malleable
B. Ductile
C. Brittle
D. Tough
