Rice milling Flashcards by Lhy Buquiron

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

water treatment

How well did you know this?

Not at all

Perfectly

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

Milling degree

How well did you know this?

Not at all

Perfectly

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

Rice mill

How well did you know this?

Not at all

Perfectly

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

Single-pass rice mill

How well did you know this?

Not at all

Perfectly

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

Percentage milling recovery

How well did you know this?

Not at all

Perfectly

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

69%

How well did you know this?

Not at all

Perfectly

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

milling

How well did you know this?

Not at all

Perfectly

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

Head grain

How well did you know this?

Not at all

Perfectly

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

90%

How well did you know this?

Not at all

Perfectly

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%

65%

How well did you know this?

Not at all

Perfectly

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

0.79

How well did you know this?

Not at all

Perfectly

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

having a series of two or three
whitening machines

How well did you know this?

Not at all

Perfectly

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

Rubber huller

How well did you know this?

Not at all

Perfectly

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

All of the above

How well did you know this?

Not at all

Perfectly

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

Coefficient of wholeness

How well did you know this?

Not at all

Perfectly

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

Brown rice

How well did you know this?

Not at all

Perfectly

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

Rubber-roll huller

How well did you know this?

Not at all

Perfectly

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

18 m/s

How well did you know this?

Not at all

Perfectly

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

25%

How well did you know this?

Not at all

Perfectly

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

25 %

How well did you know this?

Not at all

Perfectly

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

80-90 %

How well did you know this?

Not at all

Perfectly

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

decrease

How well did you know this?

Not at all

Perfectly

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

top of the huller

How well did you know this?

Not at all

Perfectly

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

1⁄2 of the thickness of the paddy grain

How well did you know this?

Not at all

Perfectly

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

Whitener

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

Frictional-type whitene

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

a. 13 m/s

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

Polisher

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

1000 rpm

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

2 to 3 mm

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

Polisher

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

Grader

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

Paddy separator

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

40-60 kg. brown rice per hour

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

100 mm long x 220 mm diameter

42. 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

150 mm long x 220 mm diameter

42. 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

254 mm long x 254 mm diameter

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

0.9 to 1.2 tons per hour

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

1.2 to 1.9 tons per hour

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

2.2 to 3.8 tons per hour

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

2.5 hp

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

4.0 hp

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

6.0 hp

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

850 to 900 bags

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

950 to 1000 bags

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

1500 to 2000 bags

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

450 to 600 kg paddy per hour

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

700 to 1000 kg paddy per hour

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

1600 to 2100 kg paddy per hour

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

3.0 hp

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

3.5 hp

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

5.5 hp

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

brown rice

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

rough rice

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

brown rice

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

rough Rice

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

huller

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

lesser is the milling recovery

Typically, the husk from the multiple- pass rice mill is collected at ___. a. silo b. bin c. bag house d. None of the above

bag house

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

huller

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

higher than

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

does not require a whitener and a polisher

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

oscillation

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

upward and forward motions