Rice Combine

Question 1

rotary device which produces a draught of air across the chaffer and cleaning sieve(s) to blow
away the materials or impurities lighter than grains

Answer 1

blower

cleaning fan

Question 2

concave-shaped, stationary element adjacent to the threshing cylinder or threshing rotor,
fitted primarily to enhance threshing

Answer 2

concave
NOTE In the case of a concave that is permeable to grain flow, either in whole or in part, it has the important
secondary function of primary separation.

Question 3

auxiliary conveyor to assist in feeding the crop to the threshing cylinder

Answer 3

crop elevator

Question 4

ratio of the actual field capacity and theoretical field capacity, expressed in percent

Answer 4

field efficiency

Question 5

device which carries the grains from grain auger to grain tank or bin

Answer 5

grain elevator

Question 6

loss classified according to source, including all field losses attributable to the machine

Answer 6

grain loss

Question 7

pan for collecting the clean grains after being passed through cleaning sieve(s) for conveying
to grain auger

Answer 7

grain pan

Question 8

tank used to hold the threshed grain

Answer 8

grain tank

bin

Question 9

portion of the combine comprising the mechanism for gathering, and cutting, stripping or
picking the crop

Answer 9

header

feed table

Question 10

grains that have fallen to the ground due to the machine’s cutting operation

Answer 10

header loss

Question 11

all matters other than grains such as paddy stalks and leaves, and weeds

Answer 11

impurities

Question 12

revolving slats or arms with battens arranged parallel to the cutter bar to hold the crop being
cut by the knife and to push and guide it to a conveyor platform or feeder conveyor auger

Answer 12

reel

Question 13

mobile grain-harvesting machine (see Figure 1) for cutting, picking, stripping or picking up
crop, threshing, separating, cleaning and conveying grain into a grain hopper and depositing
harvest residue onto the ground

Answer 13

rice combine

Question 14

oscillating structure which supports the cleaning sieve(s) and which may also support the
chaffer and the chaffer extension

Answer 14

shaker shoe

shoe

Question 15

assembly of two or more racks which agitates the straw and separates the remaining grains
from straw

Answer 15

straw walker

Question 16

element placed on the rear side of the cylinder and above to rear ward of concave or concave
grate extension or transition grate to assist the deflection of straw on straw walker

Answer 16

stripper beater

rear beater

Question 17

balanced rotating assembly, comprising rasp bars, beater bars or spikes on its periphery and
their supports, for threshing the crop, which, in conjunction with a stationary element
adjacent to it, is fitted primarily to enhance threshing, where the crop being threshed is
contained between rotating and stationary elements for less than 360°

Answer 17

threshing cylinder

threshing drum

Question 18

computed rate of being able to reap palay in a given area per unit of time

Answer 18

theoretical field capacity

Question 19

Field efficiency (%), minimum

Answer 19

75

Question 20

Header loss (%), maximum

Answer 20

0.5

Question 21

Separation loss, (%), maximum

Answer 21

1.3

Question 22

Blower loss, (%), maximum

Answer 22

1.2

Question 23

Unthreshed loss, (%), maximum

Answer 23

0.2

Question 24

Scaterring loss, (%), maximum

Answer 24

0.3

Question 25

Total machine loss (%), maximum

Answer 25

3.5

Question 26

Purity (%), minimum

with sifter and fan

Answer 26

97.0

Question 27

Purity (%), minimum

without sifter and fan

Answer 27

95

Question 28

Purity (%), minimum

without cleaning devices

Answer 28

80

Question 29

Mechanically damaged grain (%), maximum

Answer 29

2.0

Question 30

Net cracked grain (%), maximum

Answer 30

5.0

Question 31

Noise level, db(A), maximum

Answer 31

95.0*

Question 32

The reel shall be adjustable horizontally and vertically to suit different crop
conditions such as height and density. The recommended reel speed should be ______% to ______%
faster than the ground speed.

Answer 32

25 %

50 %

Question 33

The recommended peripheral speed of the threshing drum

Answer 33

20 m/s to 30 m/s.

Question 34

Warranty against defective materials and workmanship shall be provided for parts and
services except for normal wear and tear of consumable maintenance parts such as belts
within _________ from the purchase of the rice combine.

Answer 34

six months