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MOCKBOARD EXAM > RURAL ELECTRIFICATION > Flashcards

RURAL ELECTRIFICATION Flashcards

1
Q

Power system that utilizes more than one energy sources such as solar, wind and biogas.

A. Multi-source system
B. Power grid
C. Hybrid
D. NOTA

A

C. Hybrid

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2
Q

Part of aerogenerators in wind farms that converts rotational movement to AC electricity.

A. Alternator
B. Dynamo
C. Inverter
D. NOTA

A

A. Alternator

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3
Q

The rotating part of micro-hydro power plant placed across water flow.

A. Guide vane
B. Turbine
C. Penstock
D. NOTA

A

B. Turbine

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4
Q

Expression of relationship among current, resistance and voltage or electromotive force.

A. Continuity equation
B. Ohm’s law
C. Electricity equation
D. NOTA

A

B. Ohm’s law

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5
Q

Ultimate source of all energy forms.

A. Sunshine
B. Earth
C. Sun
D. NOTA

A

C. Sun

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6
Q

The application of electricity in rural areas including the home, farm and farmstead.

A. Power application
B. Rural electrification
C. Power distribution
D. NOTA

A

B. Rural electrification

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7
Q

The current rating of American Wire Gage (AWG) No. 10 wire.

A.30 amp.
B. 20 amp.
C. 15 amp.
D. NOTA

A

A. 30 amp

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8
Q

The standard size of drop wire (post to building wire) for farmhouses and households.

A.2.3 sq. mm
B. 5.5 sq. mm
C. 10.4 sq. mm
D. NOTA

A

B. 5.5 sq. mm

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9
Q

How many square millimeters is AWG No. 10 wire?

A. 8.0
B. 2.6
C. 5.5
D. NOTA

A

C. 5.5

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10
Q

Energy harnessed from dead volcanoes.

A. Volcanic energy
B. Renewable energy
C. AOTA
D. NOTA

A

B. Renewable energy

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11
Q

Solar irradiance at the Earth surface.

A.100 watts/m2
B.1,000 watt/m2
C.10,000 watts/m2
D. NOTA

A

B.1,000 watt/m2

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12
Q

In the BiGSHOW acronym of renewable energy coverage, the “S” stands for

A. Sunshine
B. Solar
C. Strong wind
D. NOTA

A

B. Solar

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13
Q

Solar irradiance multiplied by its duration is called

A. Solar insulation
B. Solar insolation
C. Solar irradiation
D. NOTA

A

B. Solar insolation

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14
Q

In the Philippines and most of southeast Asia, the daily solar energy or insolation is about

A.15 kwh/m2
B. 10 kwh/m2
C. 5 kwh/m2
D. NOTA

A

C. 5 kwh/m2

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15
Q

The reciprocal of resistance.

A. Capacitance
B. Inductance
C. Conductance
D. NOTA

A

C. Conductance

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16
Q

If the unit of resistance is ohms, what is the unit of conductance?

A. Mhos
B. Hertz
C. Langleys
D. NOTA

A

A. Mhos

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17
Q

An electric pump has total resistance of 9.5 ohms. If its power source is from a 220-volt outlet, what should be the amperage of its safety fuse? Assume 27 % surge current.

A. 45 amp.
B. 40 amp.
C. 30 amp.
D. NOTA

A

C. 30 amp.

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18
Q

What is the power generated by a micro-hydropower plant having a gross head of 80 meters and reliable discharge of 50 liters/second. Assume typical efficiency.

A. 23.5 kw
B. 28.5 kw
C. 38.5 kw
D. NOTA

A

A. 23.5 kw

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19
Q

Give the estimated mechanical power output of a windmill having a rotor diameter of 8 meters if wind velocity is 3 m/s.

A. 0.136 kw
B. 0.246 kw
C. 0.316 kw
D. NOTA

A

A. 0.136 kw

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20
Q

What is the electrical energy consumption of a 10-kw coconut oil expeller plugged in a 220-volt source if it requires 3 hours to expel oil from 1,000 kg of grated copra?

A. 0.03 kwh/kg
B. 0.05 kwh/kg
C. 0.07 kwh/kg
D. NOTA

A

A. 0.03 kwh/kg

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21
Q

What is the peak solar power generation per charging channel of a solar battery charging station equipped with 12 units of 75 watt-peak 12-volt solar module? The system is divided into 3 charging channels, each channel has 4 modules connected in parallel. Assume 80% overall efficiency.

A. 2.4 kWp
B. 240 Wp
C. 260 Wp
D. NOTA

A

B. 240 Wp

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22
Q

An industrial heater has 8 pieces heating plates of 6 ohms each. Plates are arranged in series. If the heater power source is from a 220-volt outlet, how much current will flow?

A. 3.5 amp.
B. 4.6 amp.
C. 5.2 amp.
D. NOTA

A

B. 4.6 amp.

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23
Q

How much should be budgeted annually for the electrical consumption of a 20-kw coconut oil expeller drawing 92 amperes current and having an electrical consumption of 0.04 kwh/kg copra? It expels 250 kg of copra per hour and operates 16 h/day at 264 days/year. Electricity costs PHP5/kwh. Use 10% cost safety factor.

A. PHP132,560
B. PHP 232,320
C. PHP100,160
D. NOTA

A

B. PHP 232,320

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24
Q

What is the peak amperage of a solar battery charging station equipped with 16 units of 75 watt-peak 4.16-ampere solar module? The system is divided into 4 charging channels, each channel has 4 modules connected in parallel.

A. 32.2 A
B. 25.4 A
C. 16.6 A
D. NOTA

A

C. 16.6 A

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25
Q

What is the system voltage of a solar pumping system equipped with 2 units of 75 watt-peak solar modules? Each solar module has 4.16 amperes maximum, open circuit voltage of 21 volts maximum and nominal voltage of 12 volts. Modules are connected in series.

A. 48 Volts
B.36 Volts
C. 24 Volts
D. NOTA

A

C. 24 Volts

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26
Q

Estimate the hydraulic power output of a multi-bladed windmill when windspeed is 3 m/s. It has 0.3 rotor power coefficient, 90% transmission efficiency, 90% pump volumetric efficiency and 6 meters rotor diameter. Air density is 1.2 kg/m3.

A. 38.8 watts
B. 26.4 watts
C. 65.7 watts
D. NOTA

A

A. 38.8 watts (IN RED UNDERLINED)

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27
Q

If a 10-meter-high multi-bladed windmill for vegetable farm has a minimum running windspeed of 1.5 m/s, what is the minimum windspeed for the rotor to start turning?

A. 3.1 m/s
B. 2.7 m/s
C. 1.9 m/s
D. NOTA

A

B. 2.7 m/s

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28
Q

A horizontal-axis windmill for poultry farm water pumping has a rotor diameter of 8 meters and registers a running torque of 920 Newton-meters. What is the torque needed to start its rotor turning?

A. 2,852 Nm
B. 1,908 Nm
C. 2,628 Nm
D. NOTA

A

A. 2,852 Nm

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29
Q

How many 75 watt-peak solar modules are needed for a solar powered incubator having a power rating of 144 watts, system voltage of 48 volts and amperage of 6 amperes? All solar modules used have 12 volts nominal voltage and 4.6 amperes peak amperage.

A. 4 Modules
B. 8 Modules
C. 12 Modules
D. NOTA

A

B. 8 Modules

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30
Q

What should be the tilt angle from the horizontal of the glass solar collector of a hybrid biomass-solar dryer located somewhere in Surigao, Philippines, having a longitude of 125 degrees and latitude of 9 degrees? Since Philippines is in northern hemisphere, the solar collector faces south or opposite hemisphere for maximum energy collection.

A. 10 degrees
B. 9 degrees
C. 12 degrees
D. NOTA

A

A. 10 degrees

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31
Q

Geothermal, biodiesel and windfarm renewable energy projects are evaluated for financial feasibility but only a maximum of 2 projects can be implemented. Each of them requires PHP900,000,000 investment. The financial internal rate of return (IRR) are 28.2%, 9.8% and 9.6% for geothermal, biodiesel and wind project, respectively. Annual money discount and inflation rate is 10.2%. Which project shall not be implemented?

A. Biodiesel project
B. Windfarm project
C. AOTA
D. NOTA

A

C. AOTA

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32
Q

In agricultural engineering, what is meant by FMR?

A. Farmhouse maintenance and repair
B. Farmstead main road
C. Farm-to-market road
D. None of the above

A

C. Farm-to-market road

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33
Q

What is the normal freeboard percentage for water tanks and open channels?

A. 2-3%
B. 40-50%
C. 10-20%
D. NOTA

A

C. 10-20%

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34
Q

Which shape of concrete canal needs more reinforcing bars at the lower part of its wall?

A. Parabolic
B. Rectangular
C. Circular
D. NOTA

A

B. Rectangular

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35
Q

For class A mix, give the bags of 40-kg cement needed per cubic meter of concrete.

A. 9
B. 7
C. 5
D. NOTA

A

A. 9

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36
Q

What is the proper mix class for solid concrete open channel bed and walls?

A. Class AA
B. Class A
C. Class B
D. NOTA

A

B. Class A

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37
Q

What concrete canal cross-sectional shape has its sides serving as soil retaining wall?

A. Semi-circular
B. Trapezoidal
C. Rectangular
D. NOTA

A

C. Rectangular

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38
Q

In class AA, A, B and C concrete mixes, how many cubic meters of gravel is required to produce 1 cubic meter of concrete?

A. 1.0
B. 0.8
C. 0.6
D. NOTA

A

A. 1.0

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39
Q

The equivalent amount paid by the World Bank for carbon emission reduction projects.

A. Carbon credit value
B. Emission value
C. Carbon trading value
D. NOTA

A

A. Carbon credit value

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40
Q

The acronym of the Inter-Governmental Panel for Climate Change.

A. IGPCC
B. IPCC
C. Any of the above
D. NOTA

A

B. IPCC

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41
Q

Best type of biogas plant for large animal farms having effluents with low volatile solids.

A. Fixed dome
B. Floating type
C. Covered lagoon
D. NOTA

A

C. Covered lagoon

42
Q

Plastic sheet for constructing balloon and bed lining in covered lagoon biogas plants.

A. Acetate
B. Polyvinyl Chloride (PVC)
C. High density polyethylene (HDPE)
D. None of the above

A

C. High density polyethylene (HDPE)

43
Q

By how many times is methane destructive to the environment than carbon dioxide?

A. 2 times
B. 10 times
C. 21 times
D. NOTA

A

C. 21 times

44
Q

Energy system consisting of the digester, gasholder, mixing tank and sludge tank.

A. Biogas work
B. Biogas plant
C. Fermenter
D. NOTA

A

B. Biogas plant

45
Q

Flammable gas derived from anaerobic fermentation of any organic matter especially animal manure or manure-biomass mixture.

A. Methane
B. LPG
C. Biogas
D. NOTA

A

C. Biogas

46
Q

The estimated proportion of methane in biogas for digesters using 1:1 water-manure ratio.

A. 25%
B. 60%
C. 35%
D. NOTA

A

B. 60%

47
Q

The estimated proportion of carbon dioxide in biogas for digesters using 1:1 water-manure ratio.

A. 10%
B. 20%
C. 40%
D. NOTA

A

C. 40%

48
Q

The non-flammable component of biogas occupying significant volume.

A. Water vapor
B. Carbon dioxide
C. Hydrogen
D. NOTA

A

B. Carbon dioxide

49
Q

Water and manure mixture.

A. Slurry
B. Scum
C. Sewerage
D. NOTA

A

A. Slurry

50
Q

Color of biogas flame during daytime in outdoor areas.

A. Colorless
B. Red
C. Yellow
D. NOTA

A

A. Colorless

51
Q

Estimated biogas produced per kg cow manure for 25-day hydraulic retention time.

A. 0.03 m3/kg
B. 0.05 m3/kg
C. 0.06 m3/kg
D. NOTA

A

A. 0.03 m3/kg

52
Q

Recommended manure-water ratio by volume for economical biogas production.

A. 1:0.5
B. 1:1
C. 1:1.5
D. NOTA

A

B. 1:1

53
Q

The metal-corrosive component of biogas in small amount which smells like a rotten egg.

A. Hydrogen sulfide
B. Acid
C. Nitrogen
D. NOTA

A

A. Hydrogen sulfide

54
Q

Determine the biogas consumption per day of a household using a 4-inch gas burner at 4 hours duration per day. The gas consumption of the burner is constant at 0.283 m3/hour.

A. 1.1 m3
B. 1.3 m3
C. 2.2 m3
D. NOTA

A

A. 1.1 m3

55
Q

Determine the biogas production per day of an animal farm having 10,000 heads of porkers of mixed ages. Use a retention period of 35 days. The mean daily manure production of porkers is 2.2 kg/head while the specific gas production for 35-day hydraulic retention time in the digester is 0.065 m3/kg.

A. 1,430 m3
B. 1,340 m3
C. 1,043 m3
D. NOTA

A

A. 1,430 m3

56
Q

How many heads of breeding buffalo are needed as source of manure to generate 1,000 m3 of biogas a day if the retention period is 25 days. The mean daily manure production of breeding buffalo is 13.5 kg/head while its specific gas production for 25-day manure retention period is half of that of chicken dung.

A. 504
B. 405
C. 540
D. NOTA

A

B. 405 (In red underlined)

57
Q

Determine the required digester volume of a biogas plant that will accommodate manure from a broiler farm having a capacity of 20,000 heads of mixed ages. Use 30-day retention period and 1:1 manure-water ratio. The mean daily manure production of broiler is 0.025 kg/head while its specific gas production for 30-day manure retention period is 0.062 m3/kg. Chicken dung density is 950 kg/m3.

A. 2.52 m3
B. 22.5 m3
C. 25.2 m3
D. None of the above

A

C. 25.2 m3

58
Q

Unit for battery

A. Corona
B. Amp-hr.
C. Amp (A)
D. Candela

A

B. Amp-hr.

59
Q

Modes of heat transfer where transmission occurs through substance from molecule to molecule

A. Convection
B. Conduction
C. Radiation

A

B. Conduction

60
Q

Heating value of coco shell

A.13,000 KJ/Kg
B.17,800 KJ/Kg
C.20,800 KJ/Kg
D.15,800 KJ/Kg

A

B.17,800 KJ/Kg

61
Q

Refrigerant: 150.3 Btu/lb; somewhat toxic; flammable

A. Methyl chloride
B. Ammonia
C. Methane
D. NOTA

A

A. Methyl chloride

62
Q

Tetraflouroethane is the chemical name of refrigerant

A.R-115
B.R-134a
C.R-118a
D.R-22

A

B.R-134a

63
Q

It embodies the first Agricultural Engineering Law in the Philippines

A. RA 8559
B. RA 8435
C. RA 3927
D. RA 9184

A

C. RA 3927

64
Q

A special electric motor required 1.962 kW and 9.5 amperes from a given voltage source of 220 V with 50 Hz frequency. What is the power factor of the motor.

A. 0.96
B. 0.84
C. 0.94
D. 0.8

A

C. 0.94

65
Q

Unit for magnetic flux

A. Weber
B. Tesla
C. kW-hr.
D. Candela

A

A. Weber

66
Q

Unit for flux density

A. Weber
B. Tesla
C. kW-hr.
D. Candela

A

B. Tesla

67
Q

Refrigerant: 89.4 Btu/lb; non toxic and flammable

A. Freon 21
B. Freon 22
C. Freon 11
D. Freon 12

A

A. Freon 21

68
Q

Which of the following is not useful information provided by Shear and Moment Diagram?

A. It shows the most likely section where a beam may fail in shear or bending.
B. Provides data for proper reinforcements of concrete.
C. Provides information on bending moment at any point.
D. None of the above

A

D. None of the above

69
Q

Amount of heat needed to increase or decrease 1 lb of water to 1 F

A. Sensible heat
B. Latent heat
C. Btu
D. Specific heat

A

C. Btu

70
Q

Agent conduct heat from refrigerated coils and release outside air

A. Load
B. Refrigerant
C. R-115
D. Ammonia

A

B. Refrigerant

71
Q

Oldest and widely used for large installation: 475.5 Btu/lb; Highly toxic and flammable

A. Methyl chloride
B. Ammonia
C. Methane
D. NOTA

A

B. Ammonia

72
Q

Contract in which the agreement of the parties is inferred from their conduct.

A. Valid contract
B. implied contract
C. quasi contract
D. joint contract

A

B. implied contract

73
Q

It is a basic electrical element which prevents the current from changing instantly.

A. Inductor
B. Resistor
C. Capacitor
D. Insulator

A

A. Inductor

74
Q

Instrument simplest and reliable difference of fluid height in the tube

A. Barometer
B. Techometer
C. Manometer
D. AOTA

A

C. Manometer

75
Q

Unit for alternating current (AC)

A.KVA
B. Amp-hr.
C. Amp (A)
D. kVolt

A

A.KVA

76
Q

Unit for AC with capacitor

A. KVA
B. KVAR
C. Amp (A)
D. KVolt

A

A. KVA

77
Q

Main cause of air pollution as a result of combustion of fuel.

A. Carbon monoxide
B. Carbon dioxide
C. Methane
D. Fossil fuel

A

B. Carbon dioxide

78
Q

Unit for reactive power (Q)

A. Ampere
B. Volt-amp (VA)
C.KVA
D. Volt Amp-Reactive (VAR)

A

D. Volt Amp-Reactive (VAR)

79
Q

Amount heat added or removed to cause change of state without changing temperature

A. Btu
B. Latent heat
C. Sensible heat
D. Heat

A

B. Latent heat

80
Q

Standard gross heating value of gasoline

A.27,320 KJ/Kg
B.17,320 KJ/Kg
C.37,320 KJ/Kg
D.47,320 KJ/Kg

A

C.37,320 KJ/Kg (In red underlined)

81
Q

Inorganic refrigerant

A.R-717
B.R-134
C.R-115
D.R-118

A

A.R-717

82
Q

Agricultural Engineering permit is an ancillary permit supplementary to building permit to be signed and sealed by a registered Agricultural Engineer. The documents to be signed include the following except for:

A. Hatcheries
B. Dams and spillways
C. Slaughterhouse
D. Farm Products packing house

A

B. Dams and spillways

83
Q

When the resistance of a certain circuit is zero or almost zero, the circuit is called

A. Series
B. Shorted
C. Grounded
D. Open

A

B. Shorted

84
Q

An induction motor draws 7.6 A from a 220-V 60-Hz single-phase voltage supply. To improve the power factor of an induction motor from 0.787 to 1.0, the size of the parallel connected capacitor should be:

a. 54.4 microF
b. 56.2 microF
c. 56.4 microF
d. 46.4 microF

A

c. 56.4 microF

85
Q

Heating value of rice hull

A.13,000 KJ/Kg
B.14,000 KJ/Kg
C.15,000 KJ/Kg
D.16,000 KJ/Kg

A

B.14,000 KJ/Kg

86
Q

Amount of heat added or removed measured in change of temperature without changing state

A. Sensible heat
B. Btu
C. Latent heat
D. Specific heat

A

A. Sensible heat

87
Q

Amount of heat needed to increase/raise 1 lb of substance to 1 F.

A. Btu
B. Latent heat
C. Sensible heat
D. Specific heat

A

A. Btu

88
Q

Unit for capacitance (C)

A. Siemens
B. Ohm
C. Farad (f)
D. Impedance

A

C. Farad (f)

89
Q

The metal particles blown away from the welding arc.

a. arc
b. dig
c. spatter
d. spot

A

c. spatter

90
Q

Refrigerant: 141.4 Btu/lb; Very toxic but non-flammable

A. Sulfur dioxide
B. Ammonia
C. Methane
D. NOTA

A

A. Sulfur dioxide

91
Q

Unit for luminous flux

A. Lumen
B. Flux
C. Candela
D. Lux

A

A. Lumen

92
Q

Unit for illuminance

A. Lumen
B. Flux
C. Candela
D. Lux

A

D. Lux

93
Q

Unit for true power (P)

A. W
B. KW
C. V
D. KV

A

A. W

94
Q

Refrigerant for air condition

A. Freon 21
B. Freon 22
C. Freon 11
D. Freon 12

A

B. Freon 22

95
Q

Type of electric current where electricity flows in one direction only.

A. alternating current
B. direct current
C. current source
D. voltage source

A

B. direct current

96
Q

Unit for admittance (Y)

A. Farad
B. Siemens
C. Henry (H)
D. Impedance

A

B. Siemens

97
Q

Refrigerant: 51.1 Btu/hr-ft-F: Non-toxic: Non-flammable: Automobile: Household

A. Freon 12
B. Freon 21
C. Freon 22
D. Freon 11

A

A. Freon 12

98
Q

Engr. Salvanera and Engr. Opiña were asked by Dean Pabustan to design 6 pcs. of work benches for the AE REVIEW 2020. The engineers found out that they needed 12 pcs. of 2”x3”x12’ and 8 pcs. of 2”x2”x12’ for each work bench. How many board feet of lumber would they need for all the benches?

A. 324 Board Feet
B. 104 Board Feet
C. 3888 Board Feet
D. 624 Board Feet

A

D. 624 Board Feet

99
Q

Unit for luminous intensity

A. Luminous flux
B. Tesla
C. Lumen
D. Candela

A

D. Candela

100
Q

Refrigerant which has a zero-ozone depletion potential and a low greenhouse effect and considered to be leading refrigerant to replace R-12

A.R-115a
B.R-134a
C.R-118a
D.R-22a

A

B.R-134a

101
Q

200 lux is equivalent to

A. 15 Ft Candle
B. 20 Ft Candle
C. 25 Ft Candle
D. 30 Ft Candle

A

B. 20 Ft Candle

MOCKBOARD EXAM (1 decks)

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