Thursday, May 6, 2010

Rheology

Multiple Choice Questions (MCQs) from Rheology in Pharmaceutics
1: The principle method for measuring viscosity is;

a)     Capillary viscometer
b)     Concentric cylinder viscometer
c)     Falling or rolling sphere viscometer
d)     All of the above
e)     Both a & b
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2: Materials whose consistency depends on the duration of shear as wheel as on the rate of shear, exhibit;

a)    Rheopexy
b)    Thixotropy
c)    Viscoelasticity
d)    Plasticity
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3: Fluids that do not abbey Newton’s law are described as;

a)    Time dependent non-Newtonian fluids
b)    Time independent non-Newtonian fluids
c)    Newtonian fluids
d)    Both a & b
e)    None of them
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4: Elastic deformation is described by;

a)    Hook’s law
b)    Newton’s law
c)    Empirical power law
d)    Stock’s law
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5: The ratio of relaxation time of a material to the time scale of a deformation is called;
a)    Reynolds number
b)    Weissenberg number
c)    Deborah number
d)    Mass number
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6: If neither the deformation strain, nor its derivative with time (rate) follows the applied stress then the material is:

a)    Elastic
b)    Solid
c)    Viscoelastic
d)    Fluid
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Answers to Multiple Choice Questions (MCQs) from Rheology in Pharmaceutics
1: The principle method for measuring viscosity is;
Answer: -   d) All of the above

2: Materials whose consistency depends on the duration of shear as wheel as on the rate of shear, exhibit;
Answer:-   b) Thixotropy

3: Fluids that do not abbey Newton’s law are described as;
Answer:-   d) Both a & b

4: Elastic deformation is described by;
Answer:-   a) Hook’s law

5: The ratio of relaxation time of a material to the time scale of a deformation is called;
Answer:-    c) Deborah number

6: If neither the deformation strain, nor its derivative with time (rate) follows the applied stress then the material is:
Answer:-   c) Viscoelastic

(These MCQs are helpful for the preparation of Pharmacy Exams)
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Further Reading:
TUTORIAL PHARMACY



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