Question 1

Bond's work Index is the work required to reduce a unit weight from a theoretical infinite size to 80% passing ______µm.

Accepted Answer

A)  10
B)  100
C)  25
D)  None of these B

Question 2

Aerosol preparations have which phase of mixing?

Accepted Answer

A)  Solid-Liquid Mixing
B)  Liquid-Liquid Mixing
C)  Liquid-Gas Mixing
D)  None of these C

Question 3

Herringbone screen recommends use of which type of material for separation?

Accepted Answer

A)  Slurries
B)  Fibrous materials
C)  Amorphous & crystalline materials
D)  Only slurries with coarse particles C

Question 4

Ribbon blender is used to mix:

Accepted Answer

A)  Solid Mixing
B)  Liquid mixing-Liquid Mixing
C)  Solid-Solid Mixing
D)  Both (b)  or (c)

Question 5

When fluid is heated, the currents set up may cause mixing of fluid. Such heat transfer is known as:

Accepted Answer

A)  Forced Convection
B)  Natural Convection
C)  Conduction
D)  None of these

Question 6

The main principle of Sieve shaker is:

Accepted Answer

A)  Attrition
B)  Centrifugation
C)  Agitation
D)  Compression

Question 7

Which of the following is not a part of mixing vessel?

Accepted Answer

A)  Impeller
B)  Baffle
C)  Calendria
D)  Propellers

Question 8

Sonic sifter is a variant/modification of which of the following equipment?

Accepted Answer

A)  Sieve Shaker
B)  Cyclone separator
C)  Air separator
D)  Bag Filter

Question 9

Which is NOT a Mode of Size Reduction?

Accepted Answer

A)  Cutting
B)  Compression
C)  Vaporization
D)  Attrition

Question 10

Following factor does NOT influence film coefficient:

Accepted Answer

A)  Thermal conductivity of the liquid
B)  Specific heat of the film
C)  pH of the liquid
D)  Density of the liquid

Question 11

Calendria consists of no. of

Accepted Answer

A)  Baffles
B)  Jacket
C)  Tubular surfaces
D)  None of these

Question 12

A powder, all the particles of which pass through sieve no. 44 is called?

Accepted Answer

A)  Coarse powder
B)  Moderately fine powder
C)  Fine powder
D)  Very fine powder

Question 13

Ideally in mixing equipment, powder should be filled:

Accepted Answer

A)  Not more than 40%
B)  Not more than 50%
C)  Not more than 60%
D)  Not more than 70%

Question 14

In V-Cone Blender, if the speed is increased to high speed, what is observed?

Accepted Answer

A)  Segregation
B)  Sedimentation
C)  Separation
D)  None of these

Question 15

Solar water heaters, solar cookers, microwave ovens, microwave cookers, sonicator baths etc., are examples of which type transfer of heat mechanism?

Accepted Answer

A)  Conduction
B)  Radiation
C)  Convection
D)  None of these

Question 16

Dorrclone is a separator used for separating solid suspended in a liquid such as water, is a modification of which separator?

Accepted Answer

A)  Bag filter
B)  Cyclone separator
C)  Air separator
D)  None of these

Question 17

Source of heat in most of the evaporator:

Accepted Answer

A)  Coal
B)  Steam
C)  Hot water
D)  Oil bath

Question 18

The distilled water is collected in _________.

Accepted Answer

A)  Receiver
B)  Adapter
C)  Condenser
D)  Round Bottom Flask

Question 19

Following is the example of hammer mill used in Pharmaceutical Industry:

Accepted Answer

A)  Fitzpatrick comminuting machine (Fitz mill) 
B)  Hardinge Mill
C)  Centrifugal impact pulverizer
D)  None of these

Question 20

In mechanism of mixing, which is also known as Macromixing?

Accepted Answer

A)  Shear Mixing
B)  Diffusive mixing
C)  Both (a)  & (b) 
D)  Convective mixing

Exam 3: Distillation, Size Reduction and Mixing Equipment