10 Questions
What is the definition of rheology?
The study of the flow properties of fluids (liquids and semi-solids)
What is deformation?
Change in size or dimension of an object or substance under stress
What is the definition of viscosity?
The ability of a fluid to resist flowing
What is the difference between reversible and irreversible deformation?
Reversible deformation is elastic, while irreversible deformation is plastic
What is the measure of resistance to flow of liquids at a given temperature under active stress?
Dynamic viscosity
In the centimetre-gram-second (cgs) system, what are the units of kinematic viscosity?
cm2s-1
Which type of flow system is characterized by liquids whose flow characteristics are in consonance with Newton’s law of flow?
Newtonian
What is the ratio of the solution viscosity to solvent viscosity known as?
Relative viscosity
Whose law of flow states that for simple fluids, the rate of flow is directly proportional to the applied stress?
Isaac Newton
What is the measure of the ratio between dynamic viscosity and the density of fluid?
Kinematic viscosity
Test your knowledge on the rheology and viscosity of liquids, with a focus on the basic concepts of deformation and flow of materials in the context of pharmacy. The quiz draws information from various sources including 'Physical Pharmacy' by A. Martins and 'Textbook of Pharmaceutics' by M.E. Aulton.
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