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PART III-A > BELONIO > Flashcards

BELONIO Flashcards

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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

25
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. 17.08%
26
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. dry and wet bulb temperature
27
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
b. 80%
28
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
c. drying
29
Referring to the psychrometric chart, the humidity ratio is ____ during heating process . a. increasing b. decreasing c. constant d. None of the above
d. None of the above
30
In the psychrometric chart, the relative humidity ____ during heating process. a. increases b. decreases c. is constant d. None of the above
a. increases
31
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
b. decreases
32
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
b. fully saturated
33
In the psychrometric chart, the enthalpy of air is ____ during adiabatic process. a. increasing b. decreasing c. constant d. None of the above
b. decreasing
34
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. increasing
35
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
c. constant
36
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. Blower
37
Air-moving device that produces high airflow but low head. a. Fan b. Blower c. Compressor d. All of the above
a. Fan
38
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
c. Fan efficiency
39
Which of the following operations employ an air-moving device? a. Drying b. Material handling c. Refrigerating d. All of the above
d. All of the above
40
Air-moving device suitable for grain cleaning. a. Axial fan b. Propeller fan c. Cross-flow fan d. All of the above
c. Cross-flow fan
41
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
b. decrease
42
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
b. Fan
43
A Class 2 air-moving device operating at pressure less than 1 psi. a. Blower b. Fan c. Compressor d. All of the above
b. Fan
44
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
e. All of the above
45
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
c. Vane-axial fan
46
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. Backward-curved-centrifugal blower
47
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
c. Vane-axial fan
48
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
d. Vane-axial fan
49
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
b. Axial-flow fan
50
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. Propeller fan
51
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
b. decrease
52
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. increase
53
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
c. Tube-axial fan
54
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
d. Centrifugal blower
55
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. increase
56
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. increase
57
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
c. Cross-flow centrifugal blower
58

PART III-A (6 decks)

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