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PAES > PAES 201:2015 - 202:2015 > Flashcards

PAES 201:2015 - 202:2015 Flashcards

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1
Q

mechanical grain dryer wherein the grain in fixed amount is held in the drying chamber in
batches until the grain reaches the desired moisture content

A

batch type

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2
Q

batch type dryer wherein a fixed amount of grain is held stationary in a horizontal grain
holding bin

A

flat bed type

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3
Q

batch type dryer equipped to circulate and/or mixed fixed amount of grain during the drying
operation

A

recirculating type

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4
Q

organic materials used as renewable source of energy including but not limited to agricultural
crops, feed and fiber crop residues, aquatic plants, forestry and wood residues, agricultural
wastes, processing by-products and other non-fossil organic materials.

A

biomass

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5
Q

pieces of grains smaller than three-fourths (3/4) of the average length of the whole kernel

A

broken grains

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6
Q

dryer in which the material being dried moves through the drying chamber in a substantially
continuous stream and is discharged without being recirculated and where the drying and
tempering processes are accomplished in another holding bin or column

A

continuous flow dryer

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7
Q

grains which show signs of fissures or fractures or splinters

A

cracked grain

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8
Q

ear corn
corn on cob
unshelled fruit of the corn plant where husk has been removed

A

dehusked corn

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9
Q

dryer in which the products of combustion come into direct contact with the product being
dried

A

dryer, direct-fired

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10
Q

dryer in which the products of combustion do not come in contact with the products being
dried

A

dryer, indirect-fired

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11
Q

heat utilization efficiency
ratio of the total heat utilized to vaporize moisture in the material, to the amount of heat
added to the drying air expressed in percent

A

drying efficiency

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12
Q

device used to accumulate dust ( i.e. consist of aspiration fan, cyclone, etc.)

A

dust collection system

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13
Q

air moving device that is used to force heated air through the mass of grains at the desired air
flow rate and pressure

A

fan

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14
Q

device for reducing excess moisture from the grain, with or without introduction of heat

A

grain dryer

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15
Q

grain or a piece of a grain with the length equal to or greater than three-fourths (3/4) of the
average length of the whole kernel

A

head rice

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16
Q

ratio of the amount of heat added in the air to the heat available in the fuel

A

heating system efficiency

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17
Q

difference between the maximum and the minimum grain moisture content randomly
sampled after drying

A

moisture gradient

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18
Q

chamber maintained under pressure for uniform distribution of the heated air through the
grain mass

A

plenum

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19
Q

any device that is used to avoid human accident related to drying operation and/or damage to
the parts and components of the dryer during the operation and automatically shuts-off the
operation of the dryer in case of malfunction

A

safety device

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20
Q

“maize”
corn grain
corn kernels, mainly of either dent or flint varieties of the plant Zea mays

A

shelled corn

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21
Q

chamber wherein the grains are temporarily held after drying chamber or to the storage bin

A

tempering bin

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22
Q

Classification
Heated-air mechanical grain dryers shall be classified as follows:

A
  1. System of Operation
    A. Batch type
    - Flat Bed
    - Recirculating
    B. Continuous Flow
  2. Heating System
    A. Method of Heat Introduction
    - Direct
    - Indirect
    B. Fuel Source
    - Renewable
    - Non-renewable
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23
Q

The dryer shall be provided with ??? to measure the actual air temperature entering the grain mass and a pressure gauge to measure the working static pressure in the
plenum

24
Q

The noise emitted by the heated-air mechanical grain dryer shall not exceed ???

25
Provision shall be made for dust control. Its dust emission shall be within the acceptable limits set by the ???
Department of Environment and Natural Resources.
26
The construction shall be rigid and durable without major breakdown of the following major components: burner, fan, bin and conveying equipment within ??? after the date of acceptance of the unit by the end-user.
1 year???
27
Warranty shall be provided to parts and services within ??? after the date of acceptance of the unit by the end-user except on fast moving and easy to wear parts such as fan belts. General requirements of the warranty shall be in accordance with PNS/PAES 138:2004 – Agricultural Machinery – Guidelines on After Sales Service.
one (1) year
28
volume of air in cubic meters delivered to the mass of grains per second
airflow rate
29
ratio of the heat supplied by the burner, to the heat released by the fuel
burner efficiency
30
ratio of the heat released by the fuel, to the theoretical heat available from the fuel
combustion efficiency
31
grains which are heat damaged, weather damaged, ground damaged, moldy, diseased, insect bored, sprouted or distinctly damaged by insects, water, fungi and/or any other means as seen by the naked eye
damaged grains
32
average temperature of the air to be used for drying the grain, measured at a number of points as close as practicable to its entry to the grain bed
drying air temperature
33
amount of water removed per unit of time, expressed in kilogram per hour
drying rate
34
ratio of the total heat utilized for drying, to the heat available in the fuel expressed in percent
drying system efficiency
35
all matters other than rice/corn grains such as sand, gravel, dirt, pebbles, stones, lumps of earth, clay, mud, chaff, straw, weed seeds and other crop seeds
foreign matter
36
total amount of fuel consumed divided by the total drying time
fuel consumption
37
load capacity continuous flow dryer: weight of grain that could be contained in the dryer batch type dryer: weight of grain required to fill the dryer at the input moisture content
grain holding capacity
38
total amount of heat utilized to vaporize moisture in the material, expressed in kJ/kg of H2O
heat utilization
39
kernels, whole or broken, which are light green and chalky with soft texture
immature grains
40
drying rate average percentage point moisture content removed from the grain per drying time
moisture reduction rate
41
source of energy which includes petroleum-based fuels such as kerosene, gasoline, diesel oil and bunker fuel oil
non-renewable energy source
42
percentage of grains free of foreign matter
purity
43
source of energy that includes non-petroleum based fuels such as biomass and solar energy
renewable energy source
44
ratio of the weight of grains that fell out from the machine during the drying operation, to the weight of the total grain input to the dryer, expressed in percent
scattered grains
45
pressure in the plenum chamber to maintain uniform distribution of air flow through the grain mass, expressed in Pascal
static pressure
46
air movement through the drying chamber wherein air is moved through the product at a pressure lower that the atmospheric condition, expressed in Pascal
suction system
47
temporarily holding the grain between the drying passes, allowing the moisture content in the center of the grain and that on the surface of the grain to equalize
tempering
48
Indication of damage Samples of grain used for the test shall be subjected to laboratory analysis by test milling and presence of cracked grains before and after drying. Milling test of the samples obtained during drying test shall be conducted at least ??? after the drying test while air-dried samples shall be milled when its moisture content reaches ???
- 48 hours - 14%.
49
The grain to be used shall be homogeneous and the moisture content should be at least ???
22% for rice and corn.
50
Thermometers shall be mounted on or inside the dryer for temperature sensing. These shall be mounted at the following locations:
(1) near the dryer to sense ambient temperature (2) at the grain plenum interface, middle section of the total length of the plenum (3) after the plenum, and (4) immediately outside the dryer to sense exhaust air temperature.
51
For the measurement of airflow and static pressure, ??? or any other suitable apparatus shall be installed.
pitot tube and generic manometer
52
Performance test Duration of test – ??? shall be carried out with the same operational setting. The length of the test shall be such that one full capacity of grain has been dried to a final moisture content of approximately ???. Unloading and loading time of the samples in the dryer shall also be recorded
- Three test trials - 14% (for rice and corn)
53
Performance test In case of continuous flow type dryer, the dryer’s discharge mechanism shall be set as specified by the manufacturer and the grains shall undergo tempering process as the case maybe for at least ??? before reloading to the dryer for another pass. For a continuous drying operation, the minimum amount of test material to be used shall be ???.
- four (4) hours - equal to twice the rated capacity
54
Performance test Measurements – The following shall be measured at ??? or as necessary.
30-minute intervals
55
Air velocity Measurement of air velocity shall be made at the ???, whichever is applicable
air duct or at the heat exchanger
56
Samples for moisture determination shall be taken at the bottom, middle and top layer of the grain for batch type dryers and from the flow of grain from the discharge mechanism for the continuous flow dryer. At least ??? shall be taken from each layer. The samples gathered during testing shall be cooled down at ambient temperature before measuring the grain moisture content.
six (6) samples
57
PAES 201:2015 - 202: 2015
Heated Air Mechanical Grain Dryer

PAES (19 decks)

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