Deck 1: Principles and Mechanisms in Milling, Distillation, and Mixing Processes

Question 1

The working of Fluid energy mill is based on principle of

A)Impact
B)Attrition
C)Cutting
D)Both a & b

Answer 1

Both a & b

Question 2

Size reduction is also known as:

A)Comminution
B)Pulverization
C)Diminution
D)All of the above

Answer 2

Comminution

Question 3

The bell crank lever arrangement is major part of which of the following………:

A)Cyclone separator
B)Edge runner Mill
C)End runner Mill
D)Bag filter

Answer 3

Bag filter

Question 4

The hammer mill operates on the principle of:

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

Question 5

Ball Mill operates at the speed of?

A)Low speed
B)High speed
C)Optimum speed
D)All of the above

Question 6

Fluid Energy Mill works on the principle of:

A)Impact & Attrition
B)Rotor & Stator
C)Compression
D)Attrition

Question 7

Fibrous drugs are milled by using:

A)Cutter Mill
B)Hammer Mill
C)Fluid Energy Mill
D)Ball Mill

Question 8

Mills are not suitable for Friable (heat sensitive) materials?

A)Cutter Mill
B)Hammer mill
C)Colloidal Mill
D)All of the above

Question 9

In Azeotropic distillation __________ remains low:

A)Heat
B)Volatility
C)Relativity Volatility
D)None of these

Question 10

In Vacuum Distillation, Substance boils at a/an:

A)Exact temperature
B)temperature slightly above its boiling point
C)temperature below its boiling point
D)High Pressure

Question 11

In the fractionating column of fraction distillation, as we go higher in the column the…..?

A)Temperature becomes lower
B)Temperature becomes higher
C)minimum absorption occurs
D)Sublimation risk increases

Question 12

Rate of evaporation is______:

A)directly proportional to temperature of liquid
B)inversely proportional to temperature of liquid
C)independent of temperature of liquid
D)directly proportional to humidity of surrounding air

Question 13

Which of the following factors do not affect the rate of evaporation?

A)Temperature of liquid
B)Humidity of surrounding air
C)Depth of liquid
D)Surface of liquid

Question 14

Which of the following is a characteristic of a horizontal tube evaporator?

A)Agitation is provided only by bubbles leaving the evaporator as vapor
B)The tube bundle is arranged vertically, with the solution inside the tubes condensing outside
C)To handle viscous solution a pump is used to force liquid upwards
D)Also called short vertical tube evaporator

Question 15

The (emissivity) of a black body is:

A)1
B)1.5
C)2
D)None

Question 16

Mean free path is associated with which type of distillation?

A)Steam
B)Evaporative
C)Azeotropic
D)Fractional

Question 17

Which one of the following rate is observed in mixing of solids?

A)First order law
B)zero order law
C)Second order law
D)none

Question 18

Unit of the rate of heat transfer is

A)Joule
B)Newton
C)Pascal
D)Watt

Question 19

Which type of mixture is easily formed?

A)Positive
B)Negative
C)Neutral
D)Ampholytic

Question 20

Mechanism not used in solid-solid Mixing:

A)Connective
B)Shear Mixing
C)Diffusion
D)Tumbling

Question 21

Mechanism of mixing in sigma blade mixer:

A)Connective
B)Tumbling
C)Shearing
D)Diffusion

Question 22

Mechanism of mixing in silverson mixer is:

A)Connective
B)laminar
C)Random
D)Turbulent

Question 23

Degree of mixing is also known as:

A)Degree of Homogeneity
B)Extent of mixing
C)Ordered Mixing
D)Random Mixing

Question 24

__________ states that the rate of heat flow through a uniform material is proportional to the area and temperature and inversely proportional to the length of the path of flow.

A)Newton's law
B)Kick's law
C)Fourier's law
D)Chatelier's law