Pharmaceutical Mixing Quiz

What is the process in which two or more ingredients in separate or roughly mixed condition are treated so that each particle of any one ingredient is as nearly as possible adjacent to a particle of each of the other ingredients?

• Mixing

• Blending

• Segregation

• Dissolution

Which type of mixing occurs when neither mixing nor de-mixing takes place unless the system is acted upon by an external energy input?

• Turbulent mixing

• Neutral mixing

• Negative mixing

• Positive mixing

What is the primary mechanism responsible for mixing at the molecular level?

• Bulk transport

• Turbulent flow

• Laminar flow

• Molecular diffusion

Which type of impeller is most efficient when it runs at high speeds in liquids of relatively low viscosity?

• Air Jets

• Turbines

• Propellers

• Paddles

What is the primary effect of a propeller impeller in mixing?

• Radial flow

• Axial flow

• Tangential flow

• Intense turbulence

What type of impeller is employed for effectively mixing viscous liquids and semisolids?

• Air Jets

• Paddles

• Turbines

• Propellers

What is the primary purpose of air jet devices in mixing certain liquids?

• To create intense turbulence

• To lift liquids from the bottom to the top of the mixing vessel

• To confine the expanding bubbles

• To induce downward fluid flow

What is the primary flow pattern produced by air jet devices in mixing?

• Axial flow

• Radial flow

• Tangential flow

• Laminar flow

What is the primary mechanism for mixing fluids that involves the movement of a relatively large portion of the material being mixed from one location in a system to another location in a given system?

• Molecular diffusion

• Laminar mixing

• Turbulent mixing

• Bulk transport

What is the ratio of shear stress to the shear rate for non-Newtonian fluids?

• Dependent on flow rate

• Independent of flow rate

• Proportional to the applied stress

• A function of the shear stress