Electrostatic separation of minerals from each other is based on their differences in the following property ?

Related Mcqs:

1. Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother ?

   A. Cresylic acid
   B. Xanthaies
   C. Pine oil
   D. All A, B. & C.

2. Mho’s scale of hardness, which consists of 10 standard minerals is used for the measurement of _______________ hardness?

   A. Scratch
   B. Indentation
   C. Dynamic
   D. Rebound

3. At the point of boundary layer separation in fluid flow, the _____________________?

   A. Shear stress is maximum
   B. Velocity gradient is flat
   C. Density variation is maximum
   D. Shear stress is zero

4. The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?

   A. Lead
   B. Copper
   C. Aluminium
   D. Wrought iron

5. 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

6. The swift cup test evaluates the following property of a sheet metal ?

   A. Stretchability
   B. Drawability
   C. Bendability
   D. None of these

7. Property responsible for the talcum powder to cling to the skin is the__________________?

   A. Capillary action
   B. Adhesion
   C. Cohesion
   D. Surface tension

8. A material is capable of resisting softening at high temperature, because of its property termed as____________________?

   A. Hot temper
   B. Hot hardness
   C. Fatigue
   D. Creep

9. _________________ property of a material is determined by the Herbert Pendulum device?

   A. Hardness
   B. Tensile
   C. Toughness
   D. Compressive

10. The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the________________________?

    A. Resilience
    B. Toughness
    C. Ductility
    D. Impact strength