Coconut Coir Decorticator PAES 250-251:2011

Question 1

fibrous covering of a coconut fruit comprising of 30% fiber and 70% parenchymatous cells

Answer 1

coconut husk

Question 2

slender and elongated fibrous materials extracted from coconut husk

Answer 2

coconut coir

Question 3

fine and powder-like particles parenchymatous cells that are extracted from the coconut husk

Answer 3

coconut peat

Question 4

machine to crush matured coconut husk through impact or beating action to separate coco fiber and coconut peat from the husk

Answer 4

coconut coir decorticator

Question 5

ratio of the weight of the input coconut husk partially and totally undecorticated coconut husk to the total weight of the input coconut husk to the decorticator, expressed in percent

Answer 5

decorticating efficiency

Question 6

refers to the physical and morphological (e.g. tensile strength, maturity, color, fiber length and cleanliness) properties of fibers extracted

Answer 6

coir quality

Question 7

weight of coconut husk fed into the decorticator expressed in kilogram per hou

Answer 7

input capacity

Question 8

Operation of the decorticator shall require the manual feeding of coconut husk to the hopper.

Answer 8

Manual feeding

Question 9

Operation of the decorticator require mechanical means of feeding the coconut husk to the hopper (e.g. conveyor).

Answer 9

Mechanical feeding

Question 10

Coconut coir decorticator without transport mechanism (e.g. pneumatic tires).

Answer 10

Stationary type

Question 11

Blades are arranged symmetrically around a shaft or to an open cylinder.

Answer 11

Radial arrangement

Question 12

Each set of blades are arranged spirally along the axis of the shaft.

Answer 12

Spiral arrangement

Question 13

The body of the blades or decorticating mechanism shall be made of mild steel and the tips shall be hardened by heat treatment or by welding using high carbon steel or tool steel welding rod (see Fig. 4a). The pitch of blades shall have at most _____ inclination.

Answer 13

5°

Question 14

Cover for the decorticating blades shall be made of at least _____MS plate and/or BI plate or its equivalent material to provide safety for operator during decorticating process. Clamps should be used for easy opening of the cover and to secure it in place during operation.

Answer 14

2.5 mm

Question 15

Lower concave grills spacing for coconut peat outlet shall range from ____ to ____.

Answer 15

12 mm to 25 mm.

Question 16

highest grade of coir -fiber is of good cleaning with little or no pulp present in the bristle -color ranges from light brown to almost dark brown -length of fiber or bristle shall not be less than 5 in. -texture maybe described as medium harsh -no crumpled or tangled fiber

Answer 16

CH-1 (Coir Good)

Question 17

-bristle is of fair cleaning -fiber is stuck together and considerable pulps are present -strips shall not exceed 1 mm in width on the average -texture is harsh -length shall be not less than 5 in. -color ranges from dull brown to dark brown approaching black -no crumpled or tangled fiber

Answer 17

CH-2 (Coir Fair)

Question 18

-mixture of bristle and mattress fiber -generally, crumpled and tangled -of good and fair cleaning -color ranges from light brown to dull brown -texture is medium harsh -free from coir peat and hard, unfibered portion of the hus

Answer 18

CH-3 (Coir Mixed)

Question 19

mostly short crumpled fiber with average length of not less the 2 ½ in. -generally used for mattress -shall be free from coir peat and hard, undefibered husk

Answer 19

CH-4 (Coir Mattress)

Question 20

-fibers less than 2 ½ in. long -fibers with partially defibered portion of husk mixed with proportionate weight of coir peat -predominant coir peat is not included in the grade

Answer 20

CH-W (Coir Waste)

Question 21

Peripheral speed of the blades should be ____.

Answer 21

25 m/s.

Question 22

The test materials shall be coconut husk of ____months maturity. The amount of test
materials to be supplied shall be at least ___ of input capacity of coconut coir decorticator,
the condition of the test material shall be specified either as wet or dry.

Answer 22

10 to 12

75%