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PART III-A > BELONIO > Flashcards

BELONIO Flashcards

1
Q

Amount of moisture in the grains
expressed as a percentage of the
total weight of the samples.

a. Moisture content dry basis
b. Moisture content wet basis
c. Moisture content
d. All of the above

A

b. Moisture content wet basis

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2
Q

Amount of moisture in the grains
expressed as a percentage of the
weight of dry matter.

a. Moisture content dry basis
b. Moisture content wet basis
c. Moisture content
d. None of the above

A

a. Moisture content dry basis

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3
Q

Moisture meter that determines
the moisture content of the product
based on the ability of the current to
pass through the material.

a. Capacitance-type moisture
meter
b. Resistance-type meter
c. Infrared moisture meter
d. All of the above

A

a. Capacitance-type moisture
meter

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4
Q

When the amount of water in a
product is determined based on its dry
matter content, the moisture content is
expressed in ____.

a. wet basis
b. dry basis
c. semi wet basis
d. None of the above

A

b. dry basis

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5
Q

A product has 25% moisture
content expressed in dry basis. What
is the percentage moisture content of
the product in wet basis?

a. 20%
b. 22%
c. 26%
d. None of the abov

A

a. 20%
MCwb = 25%/(100% + 25%)
MCwb = 20%

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6
Q

Method of measuring the moisture
content of the product by direct
extraction of water.

a. Primary method
b. Secondary method
c. Tertiary method
d. None of the above

A

a. Primary method

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7
Q

Which of the following is
considered primary method in
determining moisture content?

a. Oven method
b. Distillation method
c. Infrared method
d. All of the above
e. None of the above

A

d. All of the above

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8
Q

If a product has 12% moisture
content expressed in wet basis, the
equivalent percentage moisture
content in dry basis is ____.

a. 13.6%
b. 16.3%
c. 13.4%
d. None of the above

A

a. 13.6%
MCdb = 12%/(100% - 12%)
MCdb = 13.63%

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9
Q
A
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10
Q

Expression of moisture content
commonly used in commercial scale.

a. Moisture content wet basis
b. Moisture content dry basis
c. Moisture content
d. All of the above

A

a. Moisture content wet basis

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11
Q

Which of the following is
considered secondary method in
determining moisture content?

a. Electrical-resistance method
b. Electrical-capacitance method
c. Chemical method
d. Hygrometric method
e. All of the above
f. None of the above

A

e. All of the above

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12
Q

Moisture found on the surface of
the material.

a. Unbound water (Free moisture)
b. Bound water
c. Chemically bound
d. All of the above

A

a. Unbound water (Free moisture)

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13
Q

Important index to determine
whether the paddy is ready for
harvesting, storage or milling.

a. Color
b. Moisture content
c. Hardness
d. None of the above

A

b. Moisture content

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14
Q

Moisture inside the tissue of a
material that can only be removed by
heating or reducing the vapor pressure
within the material.

a. Chemically-bound moisture
b. Bound moisture
c. Unbound
d. All of the above

A

b. Bound moisture

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15
Q

Difficult-to-remove moisture from
the product that requires other method
than heating in order to remove it.

a. Chemically-bound moisture
b. Bound moisture
c. Free moisture
d. All of the above

A

a. Chemically-bound moisture

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16
Q

Plot or graph representing the
equilibrium moisture content of grains
at different relative humidity but with
constant temperature.

a. Isothermal graph
b. Sorption isotherms
c. Isothermal humidity
d. None of the above

A

b. Sorption isotherms

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17
Q

Device usually used in calibrating
resistance- and capacitor-type
moisture meters.

a. Oven
b. Distillation
c. Infrared
d. All of the abov

A

a. Oven

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18
Q

Device used by the industry in
determining moisture content of
grains.

a. Oven
b. Electrical resistance- and
capacitance-type meter
c. Infrared moisture meter
d. All of the above

A

b. Electrical resistance- and
capacitance-type meter

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19
Q

If 20 kg of water is to be
removed from 110kg paddy, what is
the percentage moisture content of
the paddy in wet basis?

a. 14.5%
b. 16.9%
c. 18.18%
d. None of the above

A

c. 18.18%
MCw = 1 - [(110kg - 20kg)/110kg]
MCw = 18.18%

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20
Q

What is the percentage moisture
content of the paddy in Item 18 when
expressed in dry basis?

a. 16.4%
b. 19.9%
c. 22.2%
d. None of the above

A

c. 22.2%

MCd = 20kg/(110kg - 20kg)
MCd = 22.22%

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21
Q

Determine the amount of moisture
that can be removed from 9 tons of
paddy with 24% initial moisture
content dried to 14%.

a. 1.05 tons
b. 1.26 tons
c. 1.57 tons

A

a. 1.05 tons
Wf = [9 tons(1 - 0.24)/(1 - 0.14) = 7.95 tons
WL = Wi - Wf = 9 tons - 7.95 tons
WL = 1.05 tons

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22
Q
  1. What is the amount of moisture to
    be removed from a material with
    14.5% moisture content and 76 kg dry
    matter weight?
    a. 10.45 kg
    b. 12.89 kg
    c. 14.32 kg
    d. None of the above
A

b. 12.89 kg
Wmr = 0.145(Wmr + 76kg)
0.855 Wmr = 11.02 kg
Wmr = 11.02 kg/0.855
Wmr = 12.89 kg

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23
Q

What is the percentage
moisture content of paddy in Item
21 when expressed in dry basis?

a. 16.95%
b. 13.23%
c. 15.67%
d. None of the abov

A

a. 16.95%

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24
Q

What is the equilibrium
moisture content of paddy in dry
basis stored in bags at 27°C
storage temperature with 90%
humidity.

a. 19.78%
b. 20.66%
c. 21.56%
d. None of the above

A

b. 20.66%

25
Q

What is the moisture content of
paddy in Item 23 in wet basis?

a. 17.08%
b. 19.45%
c. 20.23%
d. None of the above

A

a. 17.08%

26
Q

A pyschrometer measures
the ____ of the air.
a. dry and wet bulb
temperature
b. dry bulb temperature and
relative humidity
c. wet bulb temperature and
relative humidity
d. None of the above

A

a. dry and wet bulb
temperature

27
Q

What is the relative
humidity of the air if the
psychrometer measures 40°C
for both the dry bulb and the
wet bulb temperatures?

a. 40%
b. 80%
c. 100%
d. All of the above

A

b. 80%

28
Q

If the point is moved
horizontally to the left of the
psychrometric chart, the
process is ____.

a. heating
b. cooling
c. drying
d. None of the above

A

c. drying

29
Q

Referring to the
psychrometric chart, the
humidity ratio is ____ during
heating process .

a. increasing
b. decreasing
c. constant
d. None of the above

A

d. None of the above

30
Q

In the psychrometric chart,
the relative humidity ____
during heating process.

a. increases
b. decreases
c. is constant
d. None of the above

A

a. increases

31
Q

Still referring to the
psychrometric chart, the enthalpy
of air ____ during heating
process.

a. increases
b. decreases
c. is constant
d. None of the above

A

b. decreases

32
Q

Wet bulb thermometer
measures the temperature of the
air at a condition that the air is
____.
a. unsaturated
b. fully saturated
c. dry
d. None of the above

A

b. fully saturated

33
Q

In the psychrometric chart, the
enthalpy of air is ____ during
adiabatic process.
a. increasing
b. decreasing
c. constant
d. None of the above

A

b. decreasing

34
Q

In the psychrometric chart, the
relative humidity of air is ____
during adiabatic process.

a. increasing
b. decreasing
c. constant
d. None of the above

A

a. increasing

35
Q

In the psychrometric chart,
the dry bulb temperature of air is
____ during adiabatic process.

a. increasing
b. decreasing
c. constant
d. None of the above

A

c. constant

36
Q

Air-moving device commonly
used for drying which produces
high pressure but low airflow.
a. Blower
b. Fan
c. Compressor
d. None of the above

A

a. Blower

37
Q

Air-moving device that produces
high airflow but low head.
a. Fan
b. Blower
c. Compressor
d. All of the above

A

a. Fan

38
Q

Measure of the power output of
a fan in relation to its power input.
a. Fan thermal efficiency
b. Fan performance index
c. Fan efficiency
d. All of the above

A

c. Fan efficiency

39
Q

Which of the following
operations employ an air-moving
device?
a. Drying
b. Material handling
c. Refrigerating
d. All of the above

A

d. All of the above

40
Q

Air-moving device suitable for
grain cleaning.
a. Axial fan
b. Propeller fan
c. Cross-flow fan
d. All of the above

A

c. Cross-flow fan

41
Q

If the diameter of the blower is
increased, the pressure will
consequently ____.

a. increase
b. decrease
c. be the same
d. None of the above

A

b. decrease

42
Q

A Class 1 air-moving device
operating at pressure equal to or more
than 1 psi.
a. Blower
b. Fan
c. Exhauster
d. All of the above

A

b. Fan

43
Q

A Class 2 air-moving device
operating at pressure less than 1 psi.

a. Blower
b. Fan
c. Compressor
d. All of the above

A

b. Fan

44
Q

Air-moving device in which the air
flow is at the same axis with the shaft
of the device.
a. Propeller fan
b. Axial-flow fan
c. Tube-axial fan
d. Vane-axial fan
e. All of the above
f. None of the above

A

e. All of the above

45
Q

Air-moving device commonly
used for 6-ton flatbed paddy dryers.
a. Forward-curved centrifugal blower
b. Propeller fan
c. Vane-axial fan
d. None of the above

A

c. Vane-axial fan

46
Q

Air-moving device commonly
used for pneumatic conveyor
systems.

a. Backward-curved-centrifugal
blower
b. Propeller fan
c. Vane-axial fan
d. None of the above

A

a. Backward-curved-centrifugal
blower

47
Q

Air-moving device commonly
used for tunnel-ventilated poultry
farms.
a. Radial-centrifugal blower
b. Propeller fan
c. Vane-axial fan
d. None of the above

A

c. Vane-axial fan

48
Q

Axial-flow-type fan with set of
guide vanes located before or after
the wheel and is capable to deliver
higher pressure than that of the tubeaxial fan.

a. Propeller fan
b. Axial-flow fan
c. Tube-axial fan
d. Vane-axial fan
e. None of the above

A

d. Vane-axial fan

49
Q

Axial-type fan with enlarged hubs
and warped blades for better
efficiency in order to operate against
higher pressure than that of the
propeller fan.

a. Propeller fan
b. Axial-flow fan
c. Tube-axial fan
d. Vane-axial fan
e. None of the above

A

b. Axial-flow fan

50
Q

Axial-type fan that delivers large
volume of air at low head and has few
narrow blades.

a. Propeller fan
b. Axial-flow fan
c. Tube-axial fan
d. Vane-axial fan
e. None of the above

A

a. Propeller fan

51
Q

If the width of the blade of an
axial-type fan is increased, the airflow
will relatively ____.

a. increase
b. decrease
c. remain the same
d. None of the above

A

b. decrease

52
Q

If the diameter of the blade of an
axial-type fan is increased, the airflow
will relatively ____.

a. increase
b. decrease
c. remain the same
d. None of the above

A

a. increase

53
Q

Axial-type fan with wider axial-flow
wheel capable of delivering higher
pressure than that of the axial-flow fan
and is driven either by belt or by
direct-drive system.

a. Propeller fan
b. Axial-flow fan
c. Tube-axial fan
d. Vane-axial fan
e. None of the above

A

c. Tube-axial fan

54
Q

Air-moving device in which airflow
enters the axis of the shaft of the
rotating blades and leaves in
perpendicular manner.

a. Propeller fan
b. Axial-flow fan
c. Tube-axial fan
d. Centrifugal blower
e. None of the above

A

d. Centrifugal blower

55
Q

If the width of the impeller of a
centrifugal-type blower is increased,
the airflow will relatively ____.

a. increase
b. decrease
c. remain the same
d. None of the above

A

a. increase

56
Q

If the diameter of the impeller of
the centrifugal-type blower is
increased, the pressure will relatively
____.
a. increase
b. decrease
c. remain the same
d. None of the above

A

a. increase

57
Q

Low-pressure high-airflow
centrifugal-type blower that delivers
uniform airflow along its length.

a. Axial-type fan
b. Centrifugal blower
c. Cross-flow centrifugal blower
d. All of the above
e. None of the above

A

c. Cross-flow centrifugal blower

58
Q
A

PART III-A (6 decks)

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