Question 1

The (emissivity) of a black body is:

Accepted Answer

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

Question 2

Mechanism of mixing in sigma blade mixer:

Accepted Answer

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

Question 3

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

Accepted Answer

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

Question 4

Mechanism not used in solid-solid Mixing:

Accepted Answer

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

Question 5

__________ 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.

Accepted Answer

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

Question 6

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

Accepted Answer

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

Question 7

Degree of mixing is also known as:

Accepted Answer

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

Question 8

Size reduction is also known as:

Accepted Answer

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

Question 9

Mechanism of mixing in silverson mixer is:

Accepted Answer

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

Question 10

In Azeotropic distillation __________ remains low:

Accepted Answer

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

Question 11

Fluid Energy Mill works on the principle of:

Accepted Answer

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

Question 12

Rate of evaporation is______:

Accepted Answer

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

The hammer mill operates on the principle of:

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

Fibrous drugs are milled by using:

Accepted Answer

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

Question 16

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

Accepted Answer

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

Question 17

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

Accepted Answer

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 18

The working of Fluid energy mill is based on principle of

Accepted Answer

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

Question 19

Mean free path is associated with which type of distillation?

Accepted Answer

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

Question 20

Unit of the rate of heat transfer is

Accepted Answer

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

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