SIZE ALTERATION

Question 1

Size Alteration of AB Materials

Answer 1

Size Reduction

Size Enlargement

Question 2

includes cutting, crushing and grinding, and milling

Answer 2

size reduction

Question 3

The performance of a machine for reducing the size of material is
characterized by the capacity, the power required per unit of material
reduced, the size and shape of the product before and after reduction,
and the range in size and shape of the resultant product.

Answer 3

Size Characteristics

Question 4

particles or units which can be accurately measured and easily seen with
minimum measurement approximately 1/8 & in. or more.

Answer 4

dimension range

Question 5

example for dimension range

Answer 5

Diced fruit and vegetables and chopped

forage

Question 6

particles with minimum dimension range of 0.125 to 0.0029 in. approximately.

Answer 6

sieve range

Question 7

examples of sieve range

Answer 7

ground feed and commercial fertilizers

Question 8

particles with minimum dimension less than 0.0029 in.

Answer 8

microscopic range

Question 9

Examples of microscopic range

Answer 9

chemical powders, dusts, and Portland cement

Question 10

Reduced materials may be placed in three groups or classes based upon
size.

Answer 10

dimension range
sieve range
microscopic range

Question 11

The simplest method and the one
most frequently used for placing granular
materials in class 2

Answer 11

Tyler Sieves

Question 12

has a
definite shaking motion and can be adjusted for
time of operation, can be used for carefully
controlled studies.

Answer 12

Ro-Tap

Question 13

A classification system devised by D. A. Abrams for concrete work is used
by the American Society of Agricultural Engineers for determining the performance of feed
grinders.

Answer 13

Fineness Modulus

Question 14

Although the fineness modulus gives an average size, it does not indicate
the distribution of the fines and coarses in any sample, and the average grain size is not
proportional to the modulus index. These objections can be overcome by using the
uniformity index which is demonstrated on the basis of the tabulated analysis.

Answer 14

Uniformity Index

Question 15

SZE CHARACTERISTICS

Answer 15

Tyler Sieves
Fineness Modulus
Uniformity Index
Energy Requirements

Question 16

The size of agricultural products is reduced by:

Answer 16

cutting
crushing
shearing

Question 17

It is separation or reduction which is produced by pushing or forcing
a thin, sharp knife through the material to be reduced.

Answer 17

cutting

Question 18

It is the reduction by applying a force to the unit to be reduced in
excess of its strength.

Answer 18

crushing

Question 19

is a combination of cutting and crushing.

Answer 19

shearing

Question 20

reducing devices

Answer 20

Hammer Mills
Burr Mills
Crushers
Roll Crushers
Jaw Crusher

Question 21

are processes that
purposely combine small particles into large permanent
masses in which the initial primary units are still identifiable.

Answer 21

size enlargement operations

Question 22

These processes are considered on the basis of the
principal mechanism used to bring the particles
together into agglomerates.

Answer 22

1. Compaction
2. Granulation
3. Encapsulation
4. Pelletizing or Tableting
5. Sintering or Heat Hardening
6. Agglomeration

Question 23

Two main categories of size enlargement

Answer 23

intantizing

extrusion

Question 24

Processes that aim to control the functional properties(Density
and Porosity) of the materials in order to to influence properties such as
reconstitutability, dispersibility, and solubility.

Answer 24

intantizing

Question 25

Processes with an objective of obtaining definite shapes or

defined forms.

Answer 25

extrusion

Question 26

Transforms a powder material into larger entities, to end up with an aggregate considerably
larger in size and with a porous structure.

Answer 26

granulation/tumbling agglomeration

Question 27

Powders are densified and compacted by the application of External Force in a confined space.
With most materials, the necessary condition to produce a strong compact is to reduce the
porosity to a minimum and increase the density at the maximum.

Answer 27

compaction/pressure method

Question 28

Bonding by treatment at high temperature

Answer 28

sintering/heat method

Question 29

Bonding by treatment at high temperature

Answer 29

sintering/heat method

Question 30

involves the incorporation of food ingredients, enzymes, cells or other materials in small
capsules.

Answer 30

encapsulation

Question 31

a method of agglomeration, or particle size enlargement, in which material fines are
processed into pellets or granules

Answer 31

pelletizing

Question 32

a method of agglomeration, or particle size enlargement, in which material fines are
processed into a tablet.

Answer 32

tableting

Question 33

Forces involve in Agglomeration and

Granulation

Answer 33

1. Solid and Liquid Bridges, Capillary Forces
2. Van der Waals’ forces
3. Electrostatic forces
   4.