A. Copper
B. Zinc
C. Tin
D. Aluminium
Related Mcqs:
- Tin based white metals are used, where bearings are subjected to___________________?
A. High pressure & load
B. Low pressure & load
C. High temperature
D. Large surface wear - Strain hardening effect in metals subjected to cold working is due to the _______________ mechanism?
A. Slip
B. Fracture
C. Winning
D. Dislocation - Fire refining process is employed in case of___________________?
A. Tin
B. Copper
C. Zinc
D. Aluminium - The leaching solvent used in Baeyer’s process for the purification of bauxite is___________________?
A. Ammonium hydroxide
B. Sodium carbonate
C. Sodium hydroxide
D. Ammonium carbonate - One of the methods of purification of leach liquor is ion exchange, which involves_________________?
A. Exchange between two liquid phases
B. Exchange between a gaseous phase and a liquid phase
C. Exchange between a liquid phase and an organic resin phase
D. Exchange between a solid phase and a gas phase - Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to___________________?
A. Achieve very high purity of aluminium (99.9%)
B. Keep the electrolyte in liquid condition by the generation of heat
C. Electrolytically dissociate alumina
D. Both B. & C. - Which of the following metals reacts violently with water ?
A. Mercury
B. Sodium
C. Calcium
D. Magnesium - Which of the following metals cannot be hot worked at room temperature ?
A. Zinc
B. Nickel
C. Lead
D. Tin - Which of the following metals is the most prone to work hardening ?
A. Brass
B. Aluminium
C. Copper
D. Lead - In extrusion of metals, which of the following statement is true ?
A. Speed of the extruded material is same as that of ram speed
B. Redundant work is a function of the die angle
C. Relative motion between the billet surface and the container wall is always present
D. Hollow ram is used for indirect extrusion
