Processing

Question 1

Simultaneous addition of sensible heat and water vapor resulting to increase in dry bulb temperature and humidity ratio of air

Answer 1

Heating and dehumidification

Question 2

Adiabatic process (no heat gain or heat
loss) and follows a constant wet-bulb temperature line; sensible heat in the air is converted to latent heat in the
added vapor

Answer 2

Evaporative cooling

Question 3

Angle of repose of corn cob and rice hull

Answer 3

Corn cub - 30° to 36°
Rice hull - 35° to 50°

Question 4

The greatest amount of moisture which can be held by dry air occurring at saturation

Answer 4

Water Vapor Saturation Partial Pressure

Question 5

Universal gas constant in solving specific volume

Answer 5

287.055 Pa-m³/kg-K

Question 6

Slope of the sides of the grain mass when poured to rest by gravity

Answer 6

Angle of repose

Question 7

Bulk density of paddy and corn

Answer 7

Paddy- 576 Kg/m³

Corn- 720 kg/m³

Question 8

Different angle of repose

Answer 8

Very free flowing - 30°-38°
Free flowing - 39° to 45°
Cohesive or non easy flowing - 46° and above

Question 9

Measure the moisture content of air measured by a thermometer whose bulb is covered with a wet wick

Answer 9

Wet bulb temperature

Question 10

Point where drying ceases to be constant

Answer 10

Critical moisture content

Question 11

Used where rests or tempering periods allow the moisture to equalize throughout the grain; gives higher
heated air utilization per exposure and lower actual drying time

Answer 11

Intermittent drying

Question 12

Most widely used sorting device used in conjunction with air blast that will satisfactory clean and sort granular products

Answer 12

Screening

Question 13

Finely ground sample is placed near a desiccant in a closed container

Answer 13

Drying with desiccant

Question 14

Addition or removal of heat without exchange in moisture content of air

Answer 14

Sensible cooling or heating

Question 15

Lowers both dry bulb temperature and humidity ratio of air both sensible and latent heat are removed from the air

Answer 15

Cooling and dehumidification

Question 16

Angle of friction of rise in different surface

Answer 16

Steel surface - 26° to 28°
Wood along the grain - 29° to 30°
Wooden across the grain - 31°

Question 17

The handling of crops as raw material for food seeds fiber and chemical production

Answer 17

Post-production

Question 18

Angle of friction of rise in different surface

Answer 18

Steel surface - 26 to 28°
Wood along the grain - 29 to 30°
Wooden across the grain - 31° above

Question 19

Concerned with the changes in sound transmitted through the material

Answer 19

Acoustic Property

Question 20

The handling of crops as raw material for food, seeds, fiber and chemical production

Answer 20

Postproduction

Question 21

Optimum moisture content of grain at harvest

Answer 21

21-24%

Question 22

Moisture content determination where the sample is allowed to equilibrate with the atmosphere with known relative humidity and temperature in the container

Answer 22

Hygrometric Method

Question 23

Refers to a sample of matter with definite and constant composition

Answer 23

Substance

Question 24

Deal with the characteristics of light reflected from or transmitted through an object as affected by the different constituents of the object

Answer 24

Optical properties

Question 25

Optimum moisture content for milling

Answer 25

11%

Question 26

Mass per unit volume, including the pore spaces; dependent on the grain moisture content foreign matter present and variety of grain sample

Answer 26

Bulk density

Question 27

Temperature measured by an ordinary thermometer at thermal equilibrium with air

Answer 27

Dry bulb temperature

Question 28

Impurities present in the body which can be separated through sieves and other cleaning devices

Answer 28

Dockage

Question 29

Mixture of dry air and low pressure water vapor

Answer 29

Moist air

Question 30

Describe the movement of heat into or out of a material and how much it it can contain

Answer 30

Thermal Properties

Question 31

Change in transmittance of electromagnetic radiation, ratio frequency, and electrical energy that can be measured as crops undergo changes during maturation

Question 32

Concerned with the strength or resistance of a particular crop when placed under stress

Answer 32

Mechanical properties

Question 33

Maximum angle at which the grain remains in equilibrium on an inclined surface dependent on moisture and type of surface

Answer 33

Angle of friction

Question 34

An optimal pre-milling treatment given to paddy to its milling to achieve maximum recovery of head rice and to minimize breakage

Answer 34

Parboiling

Question 35

Used to determine the state of the moist air when at least two psychrometric properties are known

Answer 35

Psychrometric chart

Question 36

Temperature at which water vapor condenses when moist air is cooled sufficiently

Answer 36

Dew point temperature

Question 37

Mass per unit volume, excluding the pore spaces, measured using water displacement method and is dependent on moisture content and variety of grain sample

Answer 37

Particle density

Question 38

Water is removed by adding a chemical that combines with water

Answer 38

Chemical method

Question 39

Post harvest losses in paddy in the philippines according to BPRE(1996)

Answer 39

Piling - 0.54
Harvesting - 1.81
Threshing/Cleaning - 2.17
Storage - 2.72
Milling - 3.10
Drying - 4.50

Question 40

Operation or series of operation in which various properties of the crop are intentionally altered through the process

Answer 40

Crop processing

Question 41

Separation of clean product into various quality fractions defined on the basis of size, shape, density, texture and color

Answer 41

Sorting

Question 42

Disagreeable change or departure from the food’s normal state and such change can be detected with the sense of smell, taste, touch or vision.

Answer 42

Food spoilage

Question 43

Shortcut formula for change in weight

Answer 43

W1(1-MC1)=W2(1-MC2)

W1-W2= change in weight