Download RTMNU B.Pharma 3rd Semester 2015 Winter Pharmaceutics 3 (Unit Operations) Question Paper

NTK/KW/15/6981

Faculty of Pharmacy

B.Pharm. Third Semester (C.B.S.) Examination

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PHARMACEUTICAL-III

(UNIT OPERATIONS)

Paper-I (3T1)

Time : Three Hours] [Full Marks: 80

N.B. :— (1) Question No. 1 is compulsory.

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(2) Solve any FOUR questions from the remaining.

(3) Draw neat labeled diagram wherever necessary.

(4) Use of electronic calculator is permitted.

1. Solve any FIVE : 5×4=20
   1. Define filter aid, giving examples. Give methods of using filter aids.
   2. Give types of mixtures. Mention various mixers used for liquid and semisolid mixing.

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   3. Draw a well labelled diagram of a Bag filter.
   4. Give Fick's law of diffusion. Mention the factors affecting mass transfer.
   5. Give construction and working of ball mill. What is the optimum speed of a ball mill ? Why ?
   6. Define centrifugation. What do you understand by centrifugal effect ?
   7. Explain various factors affecting rate of filtration.

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2. (a) Give objectives and theories of size reduction. Draw a well labelled diagram of a fluid energy mill.
   (b) Define the term size separation giving significance. Mention various grades of powders and sieve number as per. I.P.
3. (a) Explain various factors influencing mixing. Classify mixers for solid mixing.
   (b) Give various mechanisms of filtration. Differentiate between Surface filtration and Depth filtration.

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4. (a) Give applications of centrifugation. Discuss principle, construction and working of supercentrifuge.
   (b) Define Turbulent and Laminar flow. Explain Fick's law of diffusion, mentioning factors affecting rate of mass transfer.
5. (a) Mention various conveyors used in pharmaceutical Industry. Give construction principle and working of a Pneumatic conveyor.
   (b) Draw a well labelled diagram of an Alpine airjet sieve. Give its principle, construction and working along with advantages and disadvantages.
6. (a) Describe in detail Bernoulli's theorem. Add a note on flowmeters.
   

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   (b) Draw a well labelled diagram of a perforated basket centrifuge giving principle, construction and working.
7. Write short notes on (any three) :
   1. Planetary mixer
   2. Rotary drum filter
   3. Sieve Analysis
   4. Factors affecting size Reduction.

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