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Area 3 > Rice milling > Flashcards

Rice milling Flashcards

1
Q

The hydrothermal treatment of paddy
before milling is called ___.
a. parboiling
b. drying
c. water treatment
d. None of the above

A

water treatment

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2
Q

The extent by which the bran layer of
the brown rice is removed as a result of
whitening.
a. Milling degree
b. Degree of whitening
c. Milling recovery
d. All of the above

A

Milling degree

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3
Q

A machine that converts paddy to
milled rice.
a. Paddy husker
b. Rice whitener
c. Rice mill

A

Rice mill

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4
Q

A kind of rice mill that employs only
one whitening machine.
a. “Kiskisan” rice mill
b. Single-pass rice mill
c. Rubber-roll rice mill
d. None of the above

A

Single-pass rice mill

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5
Q

The ratio of the weight of milled rice to
the weight of paddy multiplied by one
hundred.
a. Percentage head rice recovery
b. Percentage milling recovery
c. Percentage milling capacity
d. None of the above

A

Percentage milling recovery

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6
Q

The maximum percentage of milling
recovery from rice mills.
a. 69%
b. 75%
c. 80%
d. None of the above

A

69%

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7
Q

Broken rice is a quality deterioration
index during ___.
a. drying
b. threshing
c. milling
d. None of the above

A

milling

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8
Q

A fraction of grain with its length
equal to or greater than an average of
three-fourths.
a. Large broken grain
b. Small broken grain
c. Head grain
d. None of the above

A

Head grain

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9
Q

The minimum hulling efficiency
requirement for rice mill, based on
standard performance criterion.
a. 90%
b. 80%
c. 70%
d. None of the above

A

90%

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10
Q

If five tons of paddy is milled in 6
hours produces 3950 kg of brown rice
and 3250 kg of milled rice, what is the
milling recovery?
a. 60%
b. 65%
c. 70%

A

65%

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11
Q

Referring to Item 10 above, what is
the hulling coefficient of the huller?
a. 0.79
b. 0.89
c. 0.99

A

0.79

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12
Q

A multi-pass rice mill is characterized
by ___.
a. having two or three separate
hullers in the system
b. having a series of two or three
whitening machines
c. having the paddy loaded in the rice mill
several times
d. None of the above

A

having a series of two or three
whitening machines

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13
Q

A rice mill huller that has high milling
recovery.
a. Steel huller
b. Rubber huller
c. Stone disk
d. All of the above

A

Rubber huller

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14
Q

An example of a rice huller.
a. Steel-fluted huller
b. Rubber-roll
c. Disk
d. Centrifugal
e. All of the above

A

All of the above

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15
Q

The measure of the machine’s ability
to remove hulls with minimum breakage.
a. Coefficient of hulling
b. Coefficient of breakage
c. Coefficient of wholeness
d. All of the above

A

Coefficient of wholeness

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16
Q

A dehulled paddy but with bran layer
remaining intact.
a. Rough rice
b. Milled rice
c. Brown rice
d. All of the above

A

Brown rice

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17
Q

If the end-product in milling is brown
rice, the grain has just passed through a
___.
a. paddy cleaner
b. Rubber-roll huller
c. whitener
d. sifter
e. None of the above

A

Rubber-roll huller

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18
Q

The recommended peripheral speed
of a rubber roller for hulling operation.
a. 10 m/s
b. 14 m/s
c. 18 m/s
d. None of the above

A

18 m/s

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19
Q

The percentage speed difference
between rubber rollers.
a. 15%
b. 20%
c. 25%
d. None of the above

A

25%

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20
Q

The speed of the fixed rubber roll in a
rubber-roll huller is slower by ___
compared with that of the adjustable
roller.
a. 20 %
b. 25 %
c. 30 %
d. None of the above

A

25 %

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21
Q

The husking ratio of a rubber-roll
huller is about ___.
a. 60-70 %
b. 80-90 %
c. 95-98 %
d. None of the above

A

80-90 %

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22
Q

If the rubber-roll huller wears out,
the peripheral speed of the roller will
___.
a. decrease
b. increase
c. be the same
d. None of the above

A

decrease

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23
Q

In a disk huller, the stationary disk is
located at the ___.
a. top of the huller
b. bottom of the huller
c. side of the huller
d. None of the above

A

top of the huller

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24
Q

The recommended clearance for a
disk huller in order to achieve high
brown-rice recovery with less breakage.
a. 1⁄4 of the length of the paddy grain
b. 1⁄2 of the thickness of the paddy grain
c. 3⁄4 of the length of the paddy grain
d. None of the above

A

1⁄2 of the thickness of the paddy grain

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25
Q

A machine used to remove the bran
from brown rice.
a. Polisher
b. Husker
c. Whitener
d. All of the above

A

Whitener

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26
Q
A
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27
Q

A type of whitener consisting of a
flutted-roller rotating inside a hexagonal
chamber with slot-type perforations.
a. Abrasive-type whitener
b. Frictional-type whitener
c. All of the above
d. None of the above

A

Frictional-type whitene

28
Q

The manufacturers’ recommended
speed for the rotating cone in a vertical-
abrasive whitening cone must not exceed__.
a. 13 m/s
b. 14 m/s
c. 15 m/s
d. None of the above

29
Q

The auxillary device in a rice mill that
receives the fine bran particles from
milled rice and gives a glossy appearance
to the product.
a. Whitener
b. Grader
c. Polisher
d. All of the above

30
Q

The manufacturers’ recommended
speed for a horizontal-abrasive whitener is
___.
a. 800 rpm
b. 1000 rpm
c. 1200 rpm
d. All of the above

31
Q

The adjustment clearance for rubber
brakes in a vertical-abrasive whitening
cone is ___ from cone coating.
a. 1 to 2 mm
b. 2 to 3 mm
c. 3 to 4 mm
d. None of the above

32
Q

A machine that smoothens the
surfaces of milled rice after removing the
bran making it shiny.
a. Whitener
b. Polisher
c. Sifter
d. Grader
e. All of the above

33
Q
  1. A machine used to segregate various
    fractions/sizes of milled rice.
    a. Whitener
    b. Grader
    c. Whitener
    d. None of the above
34
Q

A machine that separates paddy from
brown rice.
a. Screen sifter
b. Paddy separator
c. Paddy husker
d. Rice whitener
e. None of the above

A

Paddy separator

35
Q

The capacity of a compartment-type
separator is ___.
a. 20-30 kg. brown rice per hour
b. 40-60 kg. brown rice per hour
c. 70-80 kg. brown rice per hour
d. None of the above

A

40-60 kg. brown rice per hour

36
Q

Roller dimension of No. 4 rubber-roll
huller.
a. 100 mm long x 220 mm diameter
b. 150 mm long x 220 mm diameter
c. 254 mm long x 254 mm diameter
d. None of the above

A

100 mm long x 220 mm diameter

37
Q
  1. Roller dimension of No. 4 rubber-roll
    huller.
    a. 100 mm long x 220 mm diameter
    b. 150 mm long x 220 mm diameter
    c. 254 mm long x 254 mm diameter
    d. None of the above
A

150 mm long x 220 mm diameter

38
Q
  1. Roller dimension of No. 10 rubber-roll
    huller.
    a. 100 mm long x 220 mm diameter
    b. 150 mm long x 220 mm diameter
    c. 254 mm long x 254 mm diameter
    d. None of the above
A

254 mm long x 254 mm diameter

39
Q

Throughput capacity of No. 4
rubber-roll huller.
a. 0.9 to 1.2 tons per hour
b. 1.2 to 1.9 tons per hour
c. 2.2 to 3.8 tons per hour
d. None of the above

A

0.9 to 1.2 tons per hour

40
Q

Throughput capacity of No.
6 rubber-roll huller.
a. 0.9 to 1.2 tons per hour
b. 1.2 to 1.9 tons per hour
c. 2.2 to 3.8 tons per hour
d. None of the above

A

1.2 to 1.9 tons per hour

41
Q

Throughput capacity of No. 10
rubber-roll huller.
a. 0.9 to 1.2 tons per hour
b. 1.2 to 1.9 tons per hour
c. 2.2 to 3.8 tons per hour
d. None of the above

A

2.2 to 3.8 tons per hour

42
Q

Horsepower requirement of No. 4
rubber-roll huller.
a. 2.5 hp
b. 4.0 hp
c. 6.0 hp
d. None of the above

43
Q

Horsepower requirement of No. 6
rubber-roll huller.
a. 2.5 hp
b. 4.0 hp
c. 6.0 hp
d. None of the above

44
Q

Horsepower requirement of No. 10
rubber-roll huller.
a. 2.5 hp
b. 4.0 hp
c. 6.0 hp
d. None of the above

45
Q

How many bags (50 kg) of paddy
processed before a pair of No. 6 rubber-
roll huller is to be replaced?

a. 850 to 900 bags
b. 950 to 1000 bags
c. 1500 to 2000 bags
d. None of the above

A

850 to 900 bags

46
Q

How many bags (50 kg) of paddy
processed before a pair of No. 8 rubber-
roll huller is to be replaced?

a. 850 to 900 bags
b. 950 to 1000 bags
c. 1500 to 2000 bags
d. None of the above

A

950 to 1000 bags

47
Q

How many bags (50 kg) of paddy
processed before a pair of No. 10 rubber-
roll huller is to be replaced?

a. 850 to 900 bags
b. 950 to 1000 bags
c. 1500 to 2000 bags
d. None of the above

A

1500 to 2000 bags

48
Q

Capacity of 750-mm disc huller.
a. 450 to 600 kg paddy per hour
b. 700 to 1000 kg paddy per hour
c. 1600 to 2100 kg paddy per hour
d. None of the above

A

450 to 600 kg paddy per hour

49
Q

Capacity of 1000-mm disc huller.
a. 450 to 600 kg paddy per hour
b. 700 to 1000 kg paddy per hour
c. 1600 to 2100 kg paddy per hour
d. None of the above

A

700 to 1000 kg paddy per hour

50
Q

Capacity of 1400-mm disc huller.
a. 450 to 600 kg paddy per hour
b. 700 to 1000 kg paddy per hour
c. 1600 to 2100 kg paddy per hour
d. None of the above

A

1600 to 2100 kg paddy per hour

51
Q

Horsepower requirement of the 750-
mm disc huller.
a. 3.0 hp
b. 3.5 hp
c. 5.5 hp
d. None of the above

52
Q

Horsepower requirement of the 1000-
mm disc huller.
a. 3.0 hp
b. 3.5 hp
c. 5.5 hp
d. None of the above

53
Q

Horsepower requirement of the 1400-
mm disc huller.
a. 3.0 hp
b. 3.5 hp
c. 5.5 hp
d. None of the above

54
Q

In a tray-type paddy separator, ___
moves upward of the tray.
a. brown rice
b. rough rice
c. milled rice
d. All of the above

A

brown rice

55
Q

In a tray-type paddy separator, ___
moves downward of the tray.
a. brown rice
b. rough rice
c. milled rice
d. All of the above

A

rough rice

56
Q

In a compartment-type paddy
separator, ___ moves downward of the
compartment.
a. brown rice
b. rough Rice
c. milled rice
d. None of the above

A

brown rice

57
Q

In a compartment-type paddy
separator, ___ moves upward of the
compartment.
a. brown rice
b. rough Rice
c. milled rice
d. None of the above

A

rough Rice

58
Q

In a multiple-pass rice mill, rough rice
obtained from the separator directly goes
to the ___.
a. whitener
b. huller
c. polisher
d. None of the above

59
Q

The more the paddy passes the
husker, the ___.
a. higher is the milling recovery
b. lesser is the milling recovery
c. same is the milling

A

lesser is the milling recovery

60
Q

Typically, the husk from the multiple-
pass rice mill is collected at ___.

a. silo
b. bin
c. bag house
d. None of the above

61
Q

The husk aspirator is located after
the ___.
a. precleaner
b. huller
c. paddy separator
d. whitener
e. polisher
f. None of the above

62
Q

Milling recovery of the multiple-pass
rice mill is ___ single-pass rice mill.
a. lesser than
b. higher than
c. the same with
d. None of the above

A

higher than

63
Q

Brown rice milling machine ___.
a. requires a whitener
b. requires a polisher
c. does not require a whitener and a
polisher
d. All of the above

A

does not require a whitener and a
polisher

64
Q

The compartment-type paddy
separator separates paddy and brown
rice through ___ of the compartment
assembly.
a. vibration
b. oscillation
c. upward-forward motion
d. None of the above

A

oscillation

65
Q

The tray-type paddy separator
separates brown rice from paddy
through ___ of the trays.
a. vibration
b. oscillation
c. upward and forward motions
d. None of the above

A

upward and forward motions

Area 3 (10 decks)

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