A. Smelting
B. Dressing
C. Roasting
D. Dressing
Related Mcqs:
- In “Imperial Smelting Process” for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following _______________________?
A. Jet of water at high pressure
B. Blast of air
C. Mixture of water and air
D. Rain of molten lead - Carbon is present in the form of _______________________ in grey cast iron ?
A. Spheroids
B. Nodular aggregates of graphite
C. Flakes
D. Cementite - Isotropic materials have the same _______________________ in all directions?
A. Induced stresses
B. Density
C. Elastic properties
D. Thermal properties - Viscoelastic behaviour is observed in _______________________ materials?
A. Non-crystalline organic polymeric
B. Ceramic
C. All crystalline
D. All amorphous - The passage between the nozzle and the _______________________ is called ‘sprue’ in case of injection moulding?
A. Runner
B. Cylinder
C. Mold
D. None of these - Optical activity is a/an _______________________ property ?
A. Additive
B. Constitutive
C. Both A. & B.
D. Neither A. nor B. - Which of the following is an ore dressing operation ?
A. Classification
B. Smelting
C. Roasting
D. None of these - The mechanism involved in the removal of metal in drilling operation is by_________________?
A. Compression
B. Extrusion
C. Shearing
D. Both B & C - Often earing defects are found during deep drawing operation, because the __________________?
A. Surface finish of the sheet is poor
B. Sheet material has been given substantial spring back
C. Starting sheet has planer anisotropy due to its texture
D. Starting sheet has normal anisotropy due to its texture - Heat transfer by ______________ is almost absent in case of fluidised bed drying operation?
A. Radiation
B. Conduction
C. Convection
D. Both B. & C.
