Processing Flashcards

1
Q

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

A

Heating and dehumidification

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2
Q

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

A

Evaporative cooling

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3
Q

Angle of repose of corn cob and rice hull

A

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

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4
Q

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

A

Water Vapor Saturation Partial Pressure

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5
Q

Universal gas constant in solving specific volume

A

287.055 Pa-m³/kg-K

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6
Q

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

A

Angle of repose

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7
Q

Bulk density of paddy and corn

A

Paddy- 576 Kg/m³

Corn- 720 kg/m³

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8
Q

Different angle of repose

A

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

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9
Q

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

A

Wet bulb temperature

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10
Q

Point where drying ceases to be constant

A

Critical moisture content

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11
Q

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

A

Intermittent drying

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12
Q

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

A

Screening

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13
Q

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

A

Drying with desiccant

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14
Q

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

A

Sensible cooling or heating

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15
Q

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

A

Cooling and dehumidification

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16
Q

Angle of friction of rise in different surface

A

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

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17
Q

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

A

Post-production

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18
Q

Angle of friction of rise in different surface

A

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

19
Q

Concerned with the changes in sound transmitted through the material

A

Acoustic Property

20
Q

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

A

Postproduction

21
Q

Optimum moisture content of grain at harvest

22
Q

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

A

Hygrometric Method

23
Q

Refers to a sample of matter with definite and constant composition

24
Q

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

A

Optical properties

25
Optimum moisture content for milling
11%
26
Mass per unit volume, including the pore spaces; dependent on the grain moisture content foreign matter present and variety of grain sample
Bulk density
27
Temperature measured by an ordinary thermometer at thermal equilibrium with air
Dry bulb temperature
28
Impurities present in the body which can be separated through sieves and other cleaning devices
Dockage
29
Mixture of dry air and low pressure water vapor
Moist air
30
Describe the movement of heat into or out of a material and how much it it can contain
Thermal Properties
31
Change in transmittance of electromagnetic radiation, ratio frequency, and electrical energy that can be measured as crops undergo changes during maturation
32
Concerned with the strength or resistance of a particular crop when placed under stress
Mechanical properties
33
Maximum angle at which the grain remains in equilibrium on an inclined surface dependent on moisture and type of surface
Angle of friction
34
An optimal pre-milling treatment given to paddy to its milling to achieve maximum recovery of head rice and to minimize breakage
Parboiling
35
Used to determine the state of the moist air when at least two psychrometric properties are known
Psychrometric chart
36
Temperature at which water vapor condenses when moist air is cooled sufficiently
Dew point temperature
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
Particle density
38
Water is removed by adding a chemical that combines with water
Chemical method
39
Post harvest losses in paddy in the philippines according to BPRE(1996)
Piling - 0.54 Harvesting - 1.81 Threshing/Cleaning - 2.17 Storage - 2.72 Milling - 3.10 Drying - 4.50
40
Operation or series of operation in which various properties of the crop are intentionally altered through the process
Crop processing
41
Separation of clean product into various quality fractions defined on the basis of size, shape, density, texture and color
Sorting
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.
Food spoilage
43
Shortcut formula for change in weight
W1(1-MC1)=W2(1-MC2) W1-W2= change in weight