Q. 1 |
Choose appropriate option for following multiple choice based questions. |
20 |
1 |
Heat flow achieved by transfer of momentum of individual atoms occurs is called as |
|
a |
Convection |
|
b |
Conduction |
|
C |
Radiation |
|
d |
Reflection |
|
2 |
This is a irreversible type of mixing …… |
|
a |
Positive mixing |
|
b |
Negative mixing |
|
C |
Neutral mixing |
|
d |
Static mixing |
|
3 |
Impellers are the devices which supply energy for …… |
|
A |
Solid-solid mixing |
|
b |
Solid-liquid mixing |
|
C |
Liquid-liquid mixing |
|
D |
Liquid evaporation |
|
4 |
Which one of the properties is responsible for the use of mercury in manometers? |
|
a |
Low surface tension |
|
b |
High vapour pressure |
|
C |
Low specific gravity |
|
d |
Low vapour pressure |
|
5 |
__________ method is used for purification and separation of chemicals of low vapour pressure |
|
a |
Molecular distillation |
|
b |
Simple distillation |
|
C |
Equilibrium distillation |
|
d |
Flash distillation |
|
6 |
Containers made for storage of injections are made from one of the following type of glasses. |
|
a |
Borosilicate |
|
b |
General purpose |
|
C |
Lime soda |
|
d |
Neutral |
|
7 |
Wet corrosion is also called as ____________ |
|
a |
Chemical cell |
|
b |
Electro chemical cell |
|
C |
Oxidation reaction |
|
d |
Liquid metal corrosion |
|
8 |
The mixing of liquids at molecular level can be termed as : |
|
a |
Bulk transport |
|
b |
Turbulent mixing |
|
C |
Laminar mixing |
|
d |
Molecular diffusion |
|
9 |
Turbulent mixing is a mechanism of …… mixing. |
|
a |
Solid-solid mixing |
|
b |
Solid-liquid mixing |
|
C |
Liquid-liquid mixing |
|
d |
solids only |
|
10 |
Which thermoplastic material is used for fabrication of tanks and pipes? |
|
a |
Flexible materials |
|
b |
Metallic surface |
|
C |
Plastic cement |
|
d |
Rigid material |
|
11 |
Water attack test is performed on glass in order to find the limits of one of the following. |
|
a |
Acid liberated |
|
b |
Alkali liberated |
|
C |
Conductivity |
|
d |
Metal ions |
|
12 |
Which metal makes the steel corrosion resistant? |
|
a |
Chromium and nickel |
|
b |
Copper and selenium |
|
C |
Tantalum and molybdenum |
|
d |
Titanium and niobium |
|
13 |
Dry corrosion is also called as _________ |
|
a |
Chemical corrosion |
|
b |
Electrochemical corrosion |
|
C |
Wet corrosion |
|
d |
Oxidation corrosion |
|
14 |
Which one of the screens is attached to the size reduction equipment? |
|
a |
Bar screens |
|
b |
Clothes sieve |
|
C |
Herringbone screen |
|
d |
Woven wire screen |
|
15 |
The term used to describe the materials that remain on the given screening surface? |
|
a |
Medium size material |
|
b |
Minus material |
|
C |
Neutral material |
|
d |
Plus material |
|
16 |
Which of following metals could provide cathodic protection to Fe? |
|
a |
Al & Cu |
|
b |
Al & Zn |
|
C |
Zn & Cu |
|
d |
Al & Ni |
|
17 |
The ability of a metal surface to withstand repeated cycles of corrosion is known as: |
|
a |
Cavitation erosion |
|
b |
Corrosion fatigue |
|
C |
Erosion |
|
d |
Stress of corrosion cracking |
|
18 |
Mean free path is associated with one of the following type of distillation. |
|
a |
Fractional distillation |
|
b |
Flash distillation |
|
C |
Simple distillation |
|
d |
Molecular distillation |
|
19 |
Which type of Head is measured during pitot tube? |
|
a |
Kinetic velocity head |
|
b |
Pressure head |
|
C |
Static velocity head |
|
d |
Total head |
|
20 |
One of the following is not applicable for centrifugal effect : |
|
a |
Centrifugal effect is ratio of centrifugal force to gravitational force. |
|
b |
Centrifugal effect diameter of rotation. |
|
c |
Centrifugal effect |
|
d |
Centrifugal effect is a force which is equal to gravitational force. |
|
21 |
Which of the following is a filtration centrifuge |
|
A |
Non-perforated basket centrifuge |
|
b |
Perforated basket centrifuge |
|
C |
Automatic batch centrifuge |
|
D |
Tubular bowl centrifuge |
|
22 |
One of the following blender cannot be used for mixing of free flowing solids : |
|
A |
V cone blender |
|
b |
Double cone blender |
|
C |
Cube blender |
|
D |
Propeller |
|
23 |
Clarification is a process where amount of solids to be separated from liquid is less than |
|
A |
1% |
|
b |
5% |
|
C |
10% |
|
D |
15% |
|
24 |
Which of the following equation contains the term, “Specifice surface area”? |
|
a |
Darcy’s equation |
|
b |
Poiseuille’s equation |
|
c |
Kozeny-Carman equation |
|
d |
Stock equation |
|
25 |
One of the following equation gives the rate of filteration |
|
a |
Darcy’s equation |
|
b |
Stoke’s equation |
|
c |
Vant - Hoff equation |
|
d |
Einstein equation |
|
26 |
.The sequence of arrangement of plates and frames in filter press can be given by dots as one of the following |
|
a |
1.2.3.1.2.3.1.2 |
|
b |
3.2.1.3.2.1.3.2 |
|
c |
1.2.3.2.1.3.2.1 |
|
d |
1.2.3.2.1.2.3.2 |
|
27 |
A mixture formed by components which do not have a tendency to mix spontaneously are termed as : |
|
a |
Positive mixtures |
|
b |
Static mixtures |
|
c |
Negative mixtures |
|
d |
Neutral mixtures |
|
28 |
Centrifugal effect is …… |
|
a |
C = F /G |
|
b |
F=G/C |
|
c |
G=F/C |
|
d |
C=FG |
|
29 |
Which centrifuge causes considerable breakage of crystals during discharge |
|
a |
Non-perforated basket centrifuge |
|
b |
Supercentrifuge |
|
c |
Semicontinuous horizontal centrifuge |
|
d |
Tubular bowl centrifuge |
|
30 |
One of the following is not a mechanism of filtration |
|
a |
Straining |
|
b |
Impingement |
|
c |
Attrition |
|
d |
Entanglement |
|
31 |
.In one of the following equation, filtration is considered similar to flow of a liquid through capillaries under pressure |
|
a |
Poiseullie’s equation |
|
b |
Stoke’s equation |
|
c |
Darcy’s equation |
|
d |
Kozeny-carman equation |
|
32 |
One of the following is not a mechanism of filtration |
|
a |
Straining |
|
b |
Impingement |
|
c |
Attrition |
|
d |
Entanglement |
|
33 |
In which region critical temperature dropped is observed? |
|
a |
Nucleate boiling region |
|
b |
Film boiling region |
|
c |
Heat loss through radiation |
|
d |
When heat flux is minimum |
|
34 |
Which of the following statements is TRUE regarding Evaporators |
|
a |
deposits rate is inversely proportional to the vapour pressure of the liquid |
|
b |
Rate of evaporation is inversely proportional to the vapour pressure of the liquid |
|
c |
Films and deposits increase the rate of evaporation |
|
d |
Type of product required decides the apparatus for evaporation |
|
35 |
Centrifugation method is used as rapid emperical test parameter for evaluation of... |
|
a |
Suspension and Emulsion |
|
b |
Syrup |
|
c |
Granules |
|
d |
Capsules |
|
36 |
Which of the two general types of centrifuge devices are for solid-liquid separations? |
|
a |
Sedimentation centrifuges, filtering centrifuges |
|
b |
Sedimentation centrifuges, decantation centrifuges |
|
c |
Filtering centrifuges, sintering centrifuges |
|
d |
Sedimentation centrifuges, two way centrifuges |
|
37 |
Screen that sharply separates the feed mixture is called? |
|
a |
Actual screen |
|
b |
Ideal screen |
|
c |
Real screen |
|
d |
Virtual screen |
|
38 |
.One of the following centrifuge causes considerable breakage of crystals during discharge : |
|
a |
(a) Non-perforated basket c-entrifuge |
|
b |
(b) perforated basket centrifuge |
|
c |
(c) Semicontinuous horizontal centrifuge |
|
d |
d) Tubular bowl centrifuge( |
|
39 |
.One of the following is not a separation technique : |
|
a |
a) Filtration |
|
b |
((b) Centrifugation |
|
c |
(c) Clarification |
|
d |
(d) Pulverization |
|
40 |
In which condition drum dryers are used? |
|
a |
When the material is too thick for spray dryer |
|
b |
When the material is too thin for spray dryer |
|
c |
When the material is not biodegradable |
|
d |
When large crystal size is to be obtained |
|
41 |
Which one of the following types of products is having an EMC of practically zero? |
|
a |
Non-porous & insoluble |
|
b |
Non-porous & soluble |
|
c |
Porous & insoluble |
|
d |
Porous & soluble |
|
42 |
Dry spots are formed during one of the following period? |
|
a |
First Falling period |
|
b |
Constant Rate period |
|
c |
Initial Adjustment period |
|
d |
Second falling period |
|
43 |
Which product is not dried by a spray dryer? |
|
a |
Bacterial & viral cultures |
|
b |
Fruit juice |
|
c |
Lactose |
|
d |
Serum |
|
44 |
What happens to drying rate during constant rate of drying period? |
|
a |
Decrease in the rate of drying |
|
b |
Increase in the rate of drying |
|
c |
Drying rate is constant |
|
d |
Drying rate is negligible |
|
45 |
What is the use of a high-pressure nozzle in a spray dryer? |
|
a |
Atomization |
|
b |
Increasing contact time |
|
c |
Decreasing contact time |
|
d |
Agitation |
|
46 |
.One of the following is not true for filtration. |
|
a |
(A) Rate of filtration surface area of filter medium. |
|
b |
(B) Rate of filtration pressure drop across filter medium. |
|
c |
(C) Rate of filtration temperature of slurry. |
|
d |
(D) Rate of filtration viscosity of slurry |
|
47 |
.One of the following is not a mechanism of filtration |
|
a |
(A) Straining |
|
b |
(B) Impingement |
|
c |
(C) Attrition |
|
d |
(D) Entanglement |
|
48 |
Economy of multiple effect evaporator is given by the formula |
|
a |
N units of vapour produced / 1 unit of steam supplied |
|
b |
1 unit of steam supplied / N units of vapour produced |
|
c |
N units of vapour produced / N unit of steam supplied |
|
d |
N unit of steam supplied / N units of vapour produced |
|
49 |
Process of evaporation can be fastened by |
|
a |
Decreasing the boiling point of liquid feed |
|
b |
Increasing the boiling point of liquid feed |
|
c |
Decreasing the surface area of evaporator |
|
d |
Decrease the time of exposure of the liquid feed to heat |
|
50 |
Hot spots are formed during one of the following drying periods? |
|
a |
Constant rate period |
|
b |
Initial readjustment period |
|
c |
First falling period |
|
d |
Second falling period |
|
51 |
In a spray dryer, the particle size is closely controlled by one of the following part of the dryer. |
|
a |
Fluid bed dryer |
|
b |
Atomizer |
|
c |
Cyclone separator |
|
d |
Drying chamber |
|
52 |
Centrifugation is helpful in separation of the following : |
|
a |
(a) Separation of dispersions with particle size > 5. |
|
b |
(b) Separation of dispersions undergoing brounian moti. |
|
c |
(c) Separation of dispersions with less differences in densities of phases. |
|
d |
(d) All of the above. |
|
53 |
. In ribbon blender, the mechanism of mixing is ……. ( |
|
a |
a) Diffusion mixing |
|
b |
(b) Turbulent mixing |
|
c |
(c) Shear |
|
d |
(d) laminar mixing |
|
54 |
Short path distillation is used for distilling_________ |
|
a |
Vitamin A & E |
|
b |
Volatile oils |
|
c |
Liquids whose boiling points are very close |
|
d |
Alcohol |
|
55 |
A person prefers to sit by a fire during the cold winter months. Which of the following heat transfer types gives him with the most heat? |
|
a |
Radiation will provide quick warmth |
|
b |
Convection and radiation together |
|
c |
If he/she is near the fire, convection sounds good |
|
d |
Conduction from the fire |
|
56 |
Which law is used to determine the rate of heat conduction through a metal wall? |
|
a |
Fouriers law |
|
b |
Newtons law |
|
c |
Stefan-Boltzmann law |
|
d |
Kirchoffs Law |
|
57 |
How many liquids are used in differential manometer? |
|
a |
Four |
|
b |
One |
|
c |
Three |
|
d |
Two |
|
58 |
Which of the following gives direct reading of the flow of fluids |
|
a |
Orifice meter |
|
b |
Pitot tube |
|
c |
Rotameter |
|
d |
Venturi meter |
|
59 |
Which factor is considered important from economic point of view while purchasing an evaporator? |
|
a |
Recovery of solvent |
|
b |
Foam formation |
|
c |
Concentration of liquid concentrate |
|
d |
Vapour pressure |
|
60 |
What differentiates forced circulation evaporator from climbing film evaporator? |
|
a |
Inclusion of pump |
|
b |
Insertion of deflector |
|
c |
Flowing of steam outside the tubes |
|
d |
Attaching a cyclone separator |
|
61 |
During size separation movement of particles can be enhanced by____________ |
|
a |
Agitation |
|
b |
Attrition |
|
c |
Gravitation |
|
d |
Mixing |
|
62 |
Stripping area in distillatory refers to________ |
|
a |
Evaporation of liquid |
|
b |
Condensation of liquid |
|
c |
Separation of components |
|
d |
Fusing of liquid |
|
63 |
Reynolds number depends on one of the following factor. |
|
a |
Roughness of the pipe |
|
b |
Surface area of the pipe |
|
c |
Viscosity of the liquid |
|
d |
Volume of the liquid |
|
64 |
Which of the following theory is used for the study of flow of fluids? |
|
a |
Bernoulis |
|
b |
Charle’s |
|
c |
Raymond’s |
|
d |
Stoke’s |
|
65 |
In horizontal tube evaporator steam is circulated through |
|
a |
Inside the evaporating tubes |
|
b |
Outside the evaporating tubes |
|
c |
Condensate inlet |
|
d |
Product outlet |
|
66 |
Scale formation in an evaporator can be avoided by |
|
a |
Inclusion of stirrer in evaporator |
|
b |
Applying vacuum to evaporator |
|
c |
Increasing temperature of liquid feed |
|
d |
Increasing surface area of evaporator |
|
67 |
Which are the modes observed in ball mill for size reduction? |
|
a |
Attrition and cutting |
|
b |
Compression and impact |
|
c |
Cutting and compression |
|
d |
Impact and attrition |
|
68 |
Size reduction can be obtained by one of the following method |
|
a |
Deflocculation |
|
b |
Flocculation |
|
c |
Mechanical |
|
d |
Agglutination |
|
69 |
The fixed plate in flat plate type heat exchanger is called as |
|
a |
Frame plate |
|
b |
Pressure plate |
|
c |
Plate pack |
|
d |
Carrying beam |
|
70 |
Which type of flow gives the most efficient rate of heat exchange? |
|
a |
Counter current flow |
|
b |
Co-current flow |
|
c |
Cross flow |
|
d |
Parallel flow |
|
71 |
Which condition of evaporation is used for the production of malt extract? |
|
a |
Reduced pressure |
|
b |
Atmospheric pressure |
|
c |
High pressure |
|
d |
Normal pressure |
|
72 |
Size reduction of materials has one of the following disadvantages. |
|
a |
High degradation |
|
b |
High dissolution |
|
c |
High flow of materials |
|
d |
high surface area |
|
73 |
One of the following mills can be considered as mechanical mortar and pestle : |
|
a |
Edge runner mill |
|
b |
End runner mill |
|
c |
Hammer mill |
|
d |
Ball mill |
|
74 |
Reynolds number may be defined as |
|
a |
The ratio of elastic forces to pressure forces |
|
b |
The ratio of gravity forces to inertial forces |
|
c |
The ratio of inertial forces to viscous forces |
|
d |
The ratio of viscous forces to inertial forces |
|
75 |
Identify characteristic of fluid? |
|
a |
Always expands and fills in the container |
|
b |
Cannot be subjected to shear forces |
|
c |
Cannot remain at rest under the action of any shear forces |
|
d |
Reynolds number may be defined as |
|
76 |
Size reduction of potent materials is necessary for one of the following quality control parameters in formulation of dosage forms. |
|
a |
Content uniformity |
|
b |
Friability |
|
c |
Hardness |
|
d |
Mixing |
|
77 |
Which theory states that the energy required for size reduction is directly proportional to the new surface area produced? |
|
a |
Griffith’s theory |
|
b |
Rittinger’s |
|
c |
Kick’s theory |
|
d |
Bond’s theory |
|
78 |
In a shell and tube heat exchanger, baffles are provided on the shell side to |
|
a |
Prevent stagnation of shell side fluid |
|
b |
Decreases rate of heat transfer |
|
c |
Decreases coefficient of friction |
|
d |
Increase the cross-sectional path |
|
79 |
Radiation heat transfer is characterized by |
|
a |
Movement of discrete packets of energy as electromagnetic waves |
|
b |
Due to bulk fluid motion, there is a transport of energy |
|
c |
There is the circulation of fluid by buoyancy effects |
|
d |
Thermal energy transfer as vibrational energy in the lattice structure of the material |
|
80 |
_____________ is used for separation of large and heavy particles |
|
a |
Bar screen |
|
b |
Bolting cloth sieves |
|
c |
Punched plate screen |
|
d |
Woven wire screens |
|
DESCRIPTIVE QUESTIONS
1. |
Explain the principle and working of spray dryer |
2. |
Explain in detail rate of drying curve |
3. |
Elaborate on different types of corrosion. |
4. |
Describe the principle, construction and working of fluidized bed dryer |
5. |
Explain Measurement of equilibrium moisture content |
6. |
What is corrosion? Explain different theories of corrosion. |
7. |
Describe various types of iron/ferrous as a material of construction |
8. |
Illustrate with diagram principle, construction and working of freeze dryer |
9. |
Explain the energy losses that occur when fluid flows through a pipe with relevant equations |
10. |
What is Reynolds number? Describe its importance |
11. |
Describe the mechanism of size reduction with suitable examples of equipment |
12. |
Describe four factors that influence the selection of milling equipment for size reduction |
13. |
Describe the specifications of standard sieves as per IP |
14. |
Describe the boiling point composition curve and working of fractional distillation |
15. |
Explain corrosion reaction between single metal and two metals. |
16. |
Explain with the help of a diagram the construction and working of ball mill |
17. |
Derive Bernoulli's equation stating the assumptions |
18. |
Comment on principle, construction and working of forced circulation evaporator |
19. |
Express shortly the mechanism of radiation and working of flat plate heat exchanger |
20. |
Write a note on distillation under reduced pressure (large scale operation) |
21. |
Describe the principle, construction and working of wiped film molecular still |
22. |
Explain principle construction, working and uses of rotary drum filter. |
23. |
Describe principle construction, working and uses of Non-perforated basket centrifuge |
24. |
Elaborate with diagram principle construction, working and uses Sigma blade? Add note on propellers and turbines |
25. |
State and explain laws governing size reduction |
26. |
Compare and contrast the advantages and disadvantages of Pitot tube and Rotameter |
27. |
Outline the principle, construction and working of horizontal tube evaporator |
28. |
Memorize the concept of heat transfer by convection and working of shell and tube heat exchanger |
29. |
Give the basic principle, theory and application of molecular distillation |
30. |
Explain the operation of bubble cap plate in fractional distillation |
31. |
Explain principle construction, working and uses of filter leaf. |
32. |
Describe principle construction, working and uses of perforated basket centrifuge |
33. |
Explain factors affecting mixing and add a note on liquid mixing mechanisms |
34. |
Explain various grades of powders official in pharmacopoeia |
35. |
Describe Reynolds classical experiment elucidating different types of flow patterns. |
36. |
Comment on principle, construction and working of climbing film evaporator |
37. |
Recall the mechanism of heat conduction and explain the working of concentric tube heat exchanger |
38. |
Define and explain the concept of volatility and relative volatility |
39. |
Write a note fractional distillation |
40. |
Explain theories of filtration |
41. |
Define centrifugation and explain application of it. |
42. |
Explain Mechanism of solid mixing. Give principle construction, working and uses of Sigma blade mixer |
43. |
Explain corrosion reaction between single metal and two metals. |
44. |
Give different preventive measures to control the corrosion. |
45. |
Write in detail about factors influencing corrosion. |
46. |
Write in detail different modes of heat transfer |
47. |
Explain the mechanism of drying process in detail |
48. |
Elaborate on design and working of simple distillation along with handling precautions |
49. |
Define drying. Give its applications and classification of dryers with examples |
50. |
Give a detailed note on factors affecting evaporation |
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