self evaluation

1.Stannite deposits constitute an important source for which of the following metal

a) Thorium

b) Titanium

c) Molybdenum

d) Tin

2. In mineral beneficiation

a) Mineral is separated

b) Particles containing mineral are separated

c)  Mineral is concentrate

d) Tailing are separated

3. The imperial smelting process for Zinc employs

a) Horizontal retort

b) Blast furnace

c) Rotary kiln

d) Laser beam

4. The Pidgeo is process for magnesium production uses

a) Carbon

b) Aluminum

c) Hydrogen

4) Ferro-silicon

5. The highest roasting rate is achieved in a

a) Hearth roaster

b) Blast roaster

c) Flash roaster

4) Shaft roaster