PNS/BAFS PAES 251&252:2021 - Corn Mill

Question 1

combination of corn grits other than corn grits nos. 10 to 18 (e.g. corn grits no. 20, corn grits no. 24) floured corn and bran

Answer 1

by-product

Question 2

grits with particle size from 0.708 mm to 0.841 mm which passed through US Sieve No. 20 but are retained in US Sieve No. 25

Answer 2

corn grits no. 20

Question 3

grits with particle size of 0.707 mm and smaller which passed through US Sieve No. 25

Answer 3

corn grits no. 24

Question 4

fine powder by-product of corn milling process

Answer 4

floured corn

fines

Question 5

embryo of the kernel removed during the degermination process

Answer 5

germ

Question 6

outer covering of the corn kernel removed during the milling process

Answer 6

pericarp

hull

Question 7

attachment of the kernel to the cob; the entryway of nutrients, water, etc. to the kernel

Answer 7

tip cap

Question 8

attachment of the kernel to the cob; the entryway of nutrients, water, etc. to the kernel

Answer 8

tip cap

Question 9

combination of germ, tip cap, pericarp, and corn grits

Answer 9

bran

Question 10

whole grain of shelled corn

Answer 10

corn kernel

Question 11

milled corn grains where the outer covering (pericarp), germ (embryo), and tip cap have been removed leaving only the endosperm that passed through different sieve sizes

Answer 11

corn grits

Question 12

machine that removes the pericarp, crushes the kernel, polishes the grits, and sorts the grits into different sizes

Answer 12

corn mill

Question 13

used to remove the germ, tip cap, and pericarp from the corn kernel

Answer 13

degermer

Question 14

ratio of the weight of degermed corn kernels to the initial weight of the degermer output sample, expressed in percent (%

Answer 14

degermer efficiency

Question 15

process of separating germ, pericarp, and tip cap from the endosperm and reducing it into grits without soaking the corn kernels before milling

Answer 15

dry milling

Question 16

part of the corn mill used to grind the degermed corn kernels into corn grits

Answer 16

grinding assembly

Question 17

part of the corn mill permitting smaller particles to fall through the openings by
means of oscillating or rotating screen, wire mesh, or perforated metal sheet

Answer 17

grit size separation assembly

sifter

Question 18

grits with particle size from 1.69mm to 2.00mm which passed through US Sieve No. 10 but are retained in US Sieve No. 12

Answer 18

corn grits no. 10

Question 19

grits with particle size from 1.42mm to 1.68mm which passed through US Sieve No. 12 but are retained in US Sieve No. 14

Answer 19

corn grits no. 12

Question 20

grits with particle size from 1.20mm to 1.41mm which passed through US Sieve No. 14 but are retained in US Sieve No. 16

Answer 20

corn grits no. 14

Question 21

grits with particle size from 1.01mm to 1.19mm which passed through US Sieve No. 16 but are retained in US Sieve No. 18

Answer 21

corn grits no. 16

Question 22

grits with particle size from 0.842mm to 1.00mm which passed through US Sieve No. 18 but are retained in US Sieve No. 20

Answer 22

corn grits no. 18

Question 23

ratio of the total weight of main products to the total weight of corn kernel input, expressed in percent (%)

Answer 23

main product recovery

Question 24

quantity of corn kernels that the corn mill can process to produce corn grits of desired size per unit of time, expressed in kilograms per hour (kg/h)

Answer 24

milling capacity

Question 25

A grinder consists of a fluted steel shaft operating inside a perforated steel screen, which also carries a projecting strip of steel whose distance from the shaft can be varied.

Answer 25

Steel huller

Question 26

A grinder consists of rotating metal blades that reduce the size of degermed corn kernels as a result of impact.

Answer 26

Rotary blade/hammer mill-type

Question 27

Degermed corn kernels are ground using pair/s of rollers made of steel that rotate in different directions.

Answer 27

Steel roller

Question 28

A grinder that uses a pair of flat disks with series of grooves on the disk face. One disk rotates while the other disk remains stationary.

Answer 28

Attrition-type

Question 29

Corn grits are sorted into different sizes by passing through sieves of different mesh sizes by reciprocating motion.

Answer 29

Oscillating

Question 30

Corn grits are sorted into different sizes by passing through rotating sieves of different mesh sizes.

Answer 30

Rotary

Question 31

What should be used in the manufacture of the different components of corn mill?

Answer 31

steel bars | metal sheet or plate

Question 32

Maximum allowable noise level for Corn Mill?

Answer 32

100 dB (A)

Question 33

Main product recovery for corn mill

Answer 33

55%

Question 34

Maximum losses for corn mill

Answer 34

5%

Question 35

Degermer efficiency

Answer 35

80%

Question 36

Warranty for corn mill

Answer 36

one year