HIGH PRIO (EXAM 1) Flashcards by Rhealene Cahigas

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

C. Hybrid

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

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

A. Alternator

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

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

B.Ohm’s law

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Ultimate source of all energy forms.

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

C. Sun

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The rotating part of microhydro power plant placed across water flow.

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

B. Turbine

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

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

A. 30 amp.

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How many square millimeters is AWG No. 10 wire?

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

C. 5.5

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

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

B. Rural electrification

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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

B. 5.5 sq. mm

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Energy harnessed from dead volcanoes.

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

B. Renewable energy

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Solar irradiance at the Earth surface.

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

B.1,000 watt/m2

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

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

B. Solar

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

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

A. Mhos

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Solar irradiance multiplied by its duration is called

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

B.Solar insolation

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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

C. 5 kwh/m2

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The reciprocal of resistance.

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

C. Conductance

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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

C. 30 amp.

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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. 23.5 kw

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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. 0.136 kw

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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. 0.03 kwh/kg

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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

B. 240 Wp

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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

B. 4.6 amp.

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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. 10 degrees

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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

C. 16.6 A

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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

B. PHP 232,320

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

C. 24 Volts

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. 38.8 watts

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

C. Farm-to-market road

What is the normal freeboard percentage for water tanks and open channels? A. 2-3% B. 40-50% C. 10-20% D. NOTA

C. 10-20%

Which shape of concrete canal needs more reinforcing bars at the lower part of its wall? A. Parabolic B. Rectangular C. Circular D. NOTA

B. Rectangular

What concrete canal cross-sectional shape has its sides serving as soil retaining wall? A. Semi-circular B. Trapezoidal C. Rectangular D. NOTA

C. Rectangular

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. 9

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

B. Class A

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. 1.0

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.Carbon credit value

The acronym of the Inter-Governmental Panel for Climate Change. A. IGPCC B. IPCC C. Any of the above D. NOTA

B. IPCC

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

C. High density polyethylene (HDPE)

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

C. Covered lagoon

Energy system consisting of the digester, gasholder, mixing tank and sludge tank. A. Biogas work B. Biogas plant C. Fermenter D. NOTA

B. Biogas plant

By how many times is methane destructive to the environment than carbon dioxide? A. 2 times B. 10 times C. 21 times D. NOTA

C. 21 times

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

C. Biogas

The estimated proportion of methane in biogas for digesters using 1:1 water-manure ratio. A. 25% B. 60% C. 35% D. NOTA

B. 60%

The estimated proportion of carbon dioxide in biogas for digesters using 1:1 water-manure ratio. A. 10% B. 20% C. 40% D. NOTA

C. 40%

Water and manure mixture. A. Slurry B. Scum C. Sewerage D. NOTA

A. Slurry

The non-flammable component of biogas occupying significant volume. A. Water vapor B. Carbon dioxide C. Hydrogen D. NOTA

B. Carbon dioxide

Color of biogas flame during daytime in outdoor areas. A. Colorless B. Red C. Yellow D. NOTA

A. Colorless

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. 0.03 m3/kg

Recommended manure-water ratio by volume for economical biogas production. A. 1:0.5 B. 1:1 C. 1:1.5 D. NOTA

B. 1:1

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. Hydrogen sulfide

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

B.Amp-hr

Modes of heat transfer where transmission occurs through substance from molecule to molecule A.Convection B.Conduction C.Radiation

B.Conduction

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

B.17,800 KJ/Kg

Refrigerant: 150.3 Btu/lb; somewhat toxic; flammable A.Methyl chloride B.Ammonia C.Methane D.NOTA

A. Methyl chloride

Tetraflouroethane is the chemical name of refrigerant A.R-115 B.R-134a C.R-118a D.R-22

B.R-134a

It embodies the first Agricultural Engineering Law in the Philippines A. RA 8559 B. RA 8435 C. RA 3927 D. RA 9184

C. RA 3927

Unit for magnetic flux A.Weber B.Tesla C.Kw-hr D.Candela

A.Weber

Unit for flux density A.Weber B.Tesla C.Kw-hr D.Candela

B.Tesla

Refrigerant: 89.4 Btu/lb; non toxic and flammable A.Freon 21 B.Freon 22 C.Freon 11 D.Freon 12

A.Freon 21

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

D. None of the above

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

C.Btu

Instrument simplest and reliable difference of fluid height in the tube A.Barometer B.Techometer C.Manometer D. AOTA

C.Manometer

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

B. implied contract

Oldest and widely used for large installation: 475.5 Btu/lb; Highly toxic and flammable A.Methyl chloride B.Ammonia C.Methane D.NOTA

B.Ammonia

It is a basic electrical element which prevents the current from changing instantly. A. Inductor B. Resistor C. Capacitor D. Insulator

A. Inductor

Unit for AC with capacitor A.KVA B.KVAR C.Amp (A) D.KVolt

B.KVAR

Agent conduct heat from refrigerated coils and release outside air A.Load B.Refrigerant C. R-115 D.Ammonia

B.Refrigerant

Main cause of air pollution as a result of combustion of fuel. A. Carbon monoxide B. Carbon dioxide C. Methane D. Fossil fuel

B. Carbon dioxide

Unit for alternating current (AC) A.KVA B.Amp-hr C.Amp (A) D.KVolt

C.Amp (A)

Unit for reactive power (Q) A.Amphere B.Volt-amp (VA) C.KVA D.Volt Amp-Reactive (VAR)

D.Volt Amp-Reactive (VAR)

Amount heat added or removed to cause change of state without changing temperature A.Btu B.Latent heat C.Sensible heat D.Heat

B.Latent heat

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

C.37,320 KJ/Kg

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.Slaughter house D. Farm Products packing house

B.Dams and spillways

When the resistance of a certain circuit is zero or almost zero, the circuit is called A. Series B. Shorted C. Grounded D. Open

B. Shorted

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

A.R-717

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. Sensible heat

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

B.14,000 KJ/Kg

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. Btu

The metal particles blown away from the welding arc. a. arc b. dig c. spatter d. spot

c. spatter

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

C. Farad (f)

Refrigerant: 141.4 Btu/lb; Very toxic but non flammable A. Sulfur dioxide B. Ammonia C. Methane D.NOTA

A. Sulfur dioxide

Unit for true power (P) A.W B.KW C.V D.KV

A.W

Unit for luminous flux A. Lumen B. Flux C. Candela D. Lux

A. Lumen

Unit for illuminance A. Lumen B. Flux C. Candela D. Lux

D. Lux

Refrigerant for air condition A. . Freon 21 B. Freon 22 C. Freon 11 D. Freon 12

B. Freon 22

Type of electric current where electricity flows in one direction only. A. alternating current B. direct current C. current source D. voltage source

B. direct current

Unit for admittance (Y) A. Farad B. Siemens C. Henry (H) D. Impedance

B. Siemens

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. Freon 12

Unit for luminous intensity A. Luminous flux B. Tesla C. Lumen D. Candela

D. Candela

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

B.R-134a

200 lux is equivalent to A. 15 Ft Candle B. 20 Ft Candle C. 25 Ft Candle D. 30 Ft Candle

B. 20 Ft Candle

HIGH PRIO (EXAM 1) Flashcards

(90 cards)