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
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
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
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
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
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
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
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
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
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
a. Sizing
b. Spatulation
c. Trituration
d. Tumbling
Answer: Sizing