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Mixing Pharmaceutical engineering MCQ with answers


Pharm Engg Chapterwise MCQ: UNIT-I MCQ * Flow of fluids * Size reduction * Size separation UNIT-II MCQ *Heat transfer *Distillation *Evaporation UNIT-III MCQ *Drying * Mixing UNIT-IV MCQ * Filtration * Centrifugation * UNIT-V MCQ Materials of construction * Corrosion


Which of the following produces randomization during the Mixing operation?
a. Dissimilar charges
b. Dissimilar forces
c. Dissimilar ions
d. Dissimilar particles

Answer: Dissimilar particles

Mixing must be done at a lower speed for semisolids, as some of them may exhibit one of the following rheological behaviour.
a. Dilatant flow
b. Plastic flow
c. Pseudoplastic flow
d. Thixotropy

Answer: Dilatant flow

Which of the following arrangements are involved in a static mixer?
a.  Shell and blade are stationary
b.  Shell and blade rotate
c.  Shell is stationary and blade rotates
d.  Shell rotates and blade is stationary

Answer: Shell is stationary and blade rotates

In which type of mixer, the trough is stationary?
a.  Barrel mixer
b. Double cone blender
c.  Ribbon mixer
d. Zigzag mixer

Answer: Ribbon mixer

When the paddle is used for the mixing of liquids, the flow pattern of fluid is.
a. axial and tangential
b. axial or tangential
c. radial and tangential
d. radial or tangential

Answer: radial and tangential

Which of the following forces aids the tumbling action for promoting inter-particle movement?
a.  Electrostatic force
b. Gravitational force
c.  Surface force
d. Van der Walls force

Answer: Gravitational force

Which one of the following rates (kinetic orders) is observed in the mixing of solids?
a. First order
b. Pseudo-first order
c. Second-order
d. Zero order

Answer: First order

Which type of particle-particle interactions is experienced on account of surface charges produced during mixing?
a. Attraction
b. Collisions
c. Diffusion
d. Repulsion

Answer: Repulsion

Which one of the following is NOT an example for inertial forces?
a. Electrostatic forces
b. London forces
c.  Surface forces
d. Van der Waals forces

Answer: Surface forces

In dispensing, which one of the following terms is NOT used for mixing?
a. Sizing
b. Spatulation
c. Trituration
d. Tumbling

Answer: Sizing

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