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WorksheetsEduQuiz - Thi trắc nghiệm
Total questions: 109
Worksheet time: 1hrs 5mins
What is renewable energy (NLTT)?
It is a type of energy with a continuous source that can be reused indefinitely according to current standards.
It is a type of energy with a continuous source that cannot be reused indefinitely.
It is a type of energy with an intermittent source.
It is a type of energy that exists in limited quantities and can be depleted due to human use.
What are the most common forms of renewable energy (NLTT) today?
Solar, wind, hydro energy.
Geothermal energy, tidal energy.
Biomass energy, biogas.
All of the above.
What is the role of renewable energy?
Mineral resources are estimated to be depleted in about 80-100 years. Renewable energy is a substitute energy source. This is a source of energy that we can reserve for future generations as it will never run out.
It does not pollute the environment, helps reduce CO2 emissions that cause greenhouse effects.
Saves budget to mitigate damage caused by environmental pollution, brings many ecological benefits. Promotes sustainable economic development, provides many jobs for workers. Helps countries be self-sufficient in energy sources, avoids energy crises, reduces radioactive production and the spread of nuclear weapons, prevents conflicts that lead to wars.
All three other answers are correct.
Currently, the consumption rate is approximately?
60%.
50%.
35%.
About 16%.
Why is the development of renewable energy sources (NLTT) in our country still limited?
Unstable.
Unstable; Low energy density; Complex extraction techniques requiring advanced technology.
Why are renewable energy sources in our country still limited?
Unstable.
Unstable; Low energy density; Complex extraction techniques requiring advanced technology.
High operating and maintenance costs.
All three answers above.
Which countries consume more than 10 million TOE of renewable energy (excluding hydropower, statistics as of 2017)?
China; USA; Germany; Japan; Brazil; India; UK; Sweden; France; Canada.
China; USA; Germany; Japan; Brazil; India; UK; Sweden; France; Italy.
China; USA; Germany; Japan; Brazil; India; UK; Australia; France; Canada.
China; USA; Germany; Japan; Brazil; India; UK; Sweden; Italy; Canada.
What is the electricity output of Vietnam as of 2017 (excluding hydropower with a capacity greater than 30MW)?
2.55 billion kWh.
1.5 billion kWh.
0.55 billion kWh.
3 billion kWh.
The development of renewable energy in general, each type of renewable energy in particular, as well as the development of electricity from renewable energy sources of each country completely depends on?
The geographical area of each country.
The capital of each country.
The ability to develop human resources for renewable energy.
Depends on the potential and advantages of each available energy resource in the country, including all types of renewable energy and the ability to access energy supplies from outside of each country.
Calculate the relative wind speed at a height of 60m with the data: Wind speed at a height of 10m (v10=3 m/s), Hellman coefficient (=0.1)?
3.1 m/s
5.6 m/s
4.5 m/s
3.6 m/s
Calculate the relative wind speed at a height of 80m with the data: Wind speed at a height of 10m (v10=3 m/s), Hellman coefficient (=0.1)?
3.1 m/s
5.6 m/s
4.5 m/s
3.7 m/s
Calculate the relative wind speed at a height of 80m with the data: Wind speed at a height of 10m (v10=3 m/s), Hellman coefficient (=0.1)?
3.1 m/s
5.6 m/s
4.5 m/s
3.7 m/s
Calculate the relative wind speed at a height of 60m with the data: Wind speed at a height of 10m (v10=5 m/s), Hellman coefficient (=0.2)?
3.1 m/s
5.6 m/s
4.5 m/s
Calculate the relative wind speed at a height of 70m with the data: Wind speed at a height of 10m (v10=4 m/s), Hellman coefficient (=0.1)?
3.1 m/s
5.6 m/s
4.5 m/s
4.9 m/s
Calculate the theoretical power of the wind turbine according to the Betz law with the data: Air density (=1.225 kg/m3), wind speed (v=6 m/s), blade length (R=25m)?
300 kW
400 kW
359 kW
260 kW
Calculate the theoretical power of the wind turbine according to the Betz law with the data: Air density (=1.225 kg/m3), wind speed (v=13 m/s), blade length (R=25m)?
2.54 MW
400 kW
359 kW
2.64 MW
Calculate the theoretical power of the wind turbine according to the Betz law with the data: Air density (=1.225 kg/m3), wind speed (v=13 m/s), blade length (R=30m)?
2.54 MW
2.65 kW
756 kW
887 kW
Calculate the theoretical power of the wind turbine according to the Betz law with the data: Air density (=1.225 kg/m3), wind speed (v=8 m/s), blade length (R=30m)?
2.54 MW
2.65 kW
3.52 kW
3.80 MW
Calculate the theoretical power of the wind turbine according to the Betz law with the data: Air density (=1.225 kg/m3), wind speed (v=10 m/s), blade length (R=35m)?
2.54 MW
2.65 kW
3.52 kW
2.36 MW
Concept of energy
What is the concept of wind energy?
It is the potential energy of low pressure wind at the equator.
It mainly depends on the direction of the sun's movement relative to the moon.
It is the kinetic energy of moving air due to temperature differences.
It cannot be converted into electrical energy.
What are the main types of winds on Earth?
East Wind, West Wind, South Wind, North Wind
Polar East Wind, Trade Wind, Temperate West Wind
Lao Wind, Equatorial Low Wind, Polar East Wind
Southeast Wind, North Wind, Temperate West Wind
In the Northern Hemisphere, due to the rotation of the Earth, winds blow to the:
Left
Right
Indeterminate, depends on the season
Indeterminate, depends on the temperature
What is the Trade Wind?
A stable airflow blowing from the equator to the poles.
A stable airflow blowing from the subtropical high-pressure area towards the equator.
A stable airflow blowing from the sea to the land along the equatorial low.
A stable airflow blowing from the land to the sea along the equatorial low.
Which of the following ground wind systems is the most stable?
East Wind
Trade Wind
Lao Wind
Temperate West Wind
What is the direction of land-sea winds?
Sea Wind blows at night into the land, land wind blows during the day out to sea.
Sea Wind blows during the day into the land, land wind blows at night out to sea.
Sea wind and land wind circulate hourly throughout the day.
None of the above options are correct.
What is the concept of the Foehn phenomenon?
A cool wind blowing in bursts from the sea to the land in spring.
A hot dry wind blowing from the mountains.
What is the concept of the Foehn phenomenon?
Cool wind blowing in bursts from the sea to the land in spring
Hot dry wind blowing in bursts from the mountains to the valleys
Lao wind blowing into Vietnam
Westerly winds blowing into Vietnam
What is the concept of the Foehn phenomenon?
Cool wind blowing in bursts from the sea to the land in spring
Hot dry wind blowing in bursts from the mountains to the valleys
Lao wind blowing into Vietnam
Westerly winds blowing into Vietnam
How many levels of wind are there in the Beaufort scale?
11
12
13
10
In the Beaufort scale, what does level 3 correspond to?
Light breeze, leaves are moving, wind speed: 1.6-3.3 m/s
Weak wind, leaves rustle and small branches start to sway, wind speed: 3.4-5.4 m/s
Strong wind, people are reluctant to go outside, wind speed: 10-12 m/s
All statements are correct
In the Beaufort scale, what does level 4 correspond to?
Wind speed: 2.3-7.9 m/s
Wind speed: 5.5-7.9 m/s
Wind speed: 10-12 m/s
Wind speed: 5.5-12.1 m/s
What is the concept of the Hellman Exponential Coefficient in the formula for relative wind speed?
Exponent coefficient predicting wind enhancement in summer
Exponent coefficient predicting the friction layer of the atmosphere depending on terrain
Exponent coefficient predicting wind reduction in winter
Exponent coefficient predicting the friction layer of trade winds
What is the concept of the Hellman Exponential Coefficient in the formula for relative wind speed?
Exponent coefficient predicting wind enhancement in summer
Exponent coefficient predicting the friction layer of the atmosphere depending on terrain
Exponent coefficient predicting wind reduction in winter
Exponent coefficient predicting the friction layer of trade winds
Assuming under certain conditions, an ideal PV cell produces 3 W while the output voltage is 0.5 V. Calculate the output power of the solar module consisting of 3 strings of cells connected in parallel (each string contains 10 series-connected PV cells).
100 W
80 W
70 W
90 W
Assuming under certain conditions, an ideal PV cell produces 3 W while the output voltage is 0.5 V. Calculate the output voltage of the solar module consisting of 3 strings of cells connected in parallel (each string contains 10 series-connected PV cells).
50 V
24 V
12 V
5 V
Assuming under certain conditions, an ideal PV cell produces 3 W while the output voltage is 0.5 V. Calculate the output current of the solar module consisting of 3 strings of cells connected in parallel (each string contains 10 series-connected PV cells).
15 A
20 A
25 A
18 A
Assuming under certain conditions, an ideal PV cell produces 3 W while the output voltage is 0.5 V. Calculate the output voltage of the solar module consisting of 5 strings of cells connected in parallel (each string contains 20 series-connected PV cells).
15 V
24 V
12 V
10 V
Assuming under certain conditions, an ideal PV cell produces 3 W while the output voltage is 0.5 V. Calculate the output power of the solar module consisting of 5 strings of cells connected in parallel (each string contains 20 series-connected PV cells).
100 W
200 W
Assuming under certain conditions, an ideal PV cell produces 3 W while the output voltage is 0.5 V. Calculate the output power of the solar module consisting of 5 parallel connected cell strings (each string has 20 series connected PV cells).
100 W
200 W
330 W
300 W
Assuming under certain conditions, an ideal PV cell produces 3 W while the output voltage is 0.5 V. Calculate the output current of the solar module consisting of 5 parallel connected cell strings (each string has 20 series connected PV cells).
1.5 A
25 A
40 A
30 A
Assuming under certain conditions, an ideal PV cell produces 3 W while the output voltage is 0.5 V. Calculate the output voltage of the solar module consisting of 6 parallel connected cell strings (each string has 15 series connected PV cells).
15 V
12.5 V
5.5 V
7.5 V
Assuming under certain conditions, an ideal PV cell produces 3 W while the output voltage is 0.5 V. Calculate the output power of the solar module consisting of 6 parallel connected cell strings (each string has 15 series connected PV cells).
100 W
200 W
330 W
270 W
Assuming under certain conditions, an ideal PV cell produces 3 W while the output voltage is 0.5 V. Calculate the output current of the solar module consisting of 6 parallel connected cell strings (each string has 15 series connected PV cells).
1.5 A
25 A
40 A
36 A
A solar panel string generates a voltage of 50 V and a current of 20 A. Calculate the power generated by this string of panels.
1000 kW
2.5 kW
25 W
1000 W
A solar power system has an efficiency of converting radiation to DC current of 10%. Assuming structural losses are negligible. Calculate the area of the roof needed.
A solar power system has an efficiency of converting radiation to DC current of 10%. Assuming structural losses are negligible, calculate the roof area needed to install 2 kW of DC power under peak radiation conditions of 1000 W/m2:
10 m2
35 m2
30 m2
20 m2
A solar power system has an efficiency of converting radiation to DC current of 12%. Assuming structural losses are negligible, calculate the roof area needed to install 3 kW of DC power under peak radiation conditions of 1000 W/m2:
10 m2
35 m2
30 m2
25 m2
A solar power system has an efficiency of converting radiation to DC current of 12%. Assuming structural losses are negligible, calculate the roof area needed to install 6 kW of DC power under peak radiation conditions of 1000 W/m2:
10 m2
35 m2
60 m2
50 m2
In the electromagnetic spectrum, which range concentrates most of the solar energy?
Wavelength range 0.38-0.78 μm
Wavelength range 106-108 μm
Wavelength range 10-102 μm
Wavelength range 1-10 μm
The beam of light that travels straight from the Sun is called:
Scattering
Direct radiation
Total radiation
Real radiation
The solar constant represents the relative intensity of direct radiation on a unit area of the Earth's surface and has a value of approximately:
2000 W/m2
2500 W/m2
1635 W/m2
1353 W/m2
What is the air mass coefficient (AM-air mass)?
It is the ratio of the mass of air in the stratosphere to the mass of air on the Earth's surface
It is the ratio of the mass of air in the atmosphere to the mass of air on the Earth's surface
What is the ratio of the mass of air in the atmosphere to the mass of air on the surface of the Earth?
It is a fixed coefficient that does not depend on the position of the sun relative to the Earth.
It is the ratio of the mass of the atmosphere in the direction of radiation to the mass of the atmosphere in the vertical direction.
What is the concept of solar hour angle?
It is the angle of the sun's position moving east or west of the local meridian due to the Earth's rotation around its axis, taken as 10º for 1 hour.
It is the angle of the sun's position moving east or west of the local meridian due to the Earth's rotation around its axis, taken as 5º for 1 hour.
It is the angle of the sun's position moving east or west of the local meridian due to the Earth's rotation around its axis, taken as -5º for 1 hour.
It is the angle of the sun's position moving east or west of the local meridian due to the Earth's rotation around its axis, taken as 15º for 1 hour.
What is the azimuth angle of the surface?
-90º to 90º
-270º to 270º
0º to 180º
-180º to 180º
When solar panels are oriented towards true south, they receive the maximum radiation when the azimuth angle is:
90º
270º
0º
180º
What is the technical potential for solar energy generation in Vietnam according to the latest 2018 study by the Institute of Energy (IE)?
2677.5 GW
166 GW
385.8 GW
1677.5 GW
What is the potential for solar energy generation in Vietnam according to the latest 2018 study by the Institute of Energy (IE)?
2677.5 GW
166 GW
385.8 GW
1677.5 GW
What is the theoretical solar radiation in Vietnam according to the latest 2018 study by the Institute of Energy (IE)?
Minimum locality: 3.46 kWh/m2/day; maximum locality: 6.77 kWh/m2/day
Minimum locality: 1.46 kWh/m2/day; maximum locality: 5.77 kWh/m2/day
Minimum locality: 3.46 kWh/m2/day; maximum locality: 4.77 kWh/m2/day
Minimum locality: 2.46 kWh/m2/day; maximum locality: 5.77 kWh/m2/day
What is the economic potential for solar energy generation (low scenario) in Vietnam according to the latest 2018 study by the Institute of Energy (IE)?
2677.5 GW
1667 GW
385.8 GW
166 GW
What is the economic potential for solar energy generation (high scenario) in Vietnam according to the latest 2018 study by the Institute of Energy (IE)?
2677.5 GW
166 GW
1667.8 GW
385.8 GW
What is the potential for solar energy in Vietnam according to the provinces ranked from highest to lowest?
Ninh Thuan, Quang Ngai, Thai Nguyen, Son La
Ninh Thuan, Dak Lak, Hanoi, Quang Tri
Ninh Thuan, Quang Tri, Quang Ngai, Thai Nguyen
Ninh Thuan, Quang Ngai, Quang Tri, Thai Nguyen
How does a solar energy stove operate?
Converts solar energy into mechanical energy
Converts solar energy into electrical energy
Converts thermal energy into electrical energy
Converts solar energy into thermal energy
What is understood by rooftop solar power projects?
Solar power projects installed on roofs or attached to buildings not connected to the power grid.
What is understood by rooftop solar power projects?
Solar power projects installed on roofs or attached to buildings not connected to the grid.
Solar power projects installed on roofs or attached to buildings indirectly connected to the grid via batteries.
Solar power projects installed only on residential roofs directly connected to the buyer's grid.
Solar power projects installed on roofs or attached to buildings directly connected to the buyer's grid.
What is understood by solar power projects?
Electricity production from thermal collectors converting thermal energy into electrical energy.
Electricity production from solar water heaters.
Electricity production from direct solar radiation on the surface of photovoltaic panels.
Electricity production from solar panels converting solar energy into electrical energy.
What is the unit of power output of a solar panel?
kWp.
W.
Wh.
Wp.
Which quantity among the following always has a value of 0?
Open circuit voltage (Voc).
Short circuit voltage (Isc).
Short circuit current (Isc).
Open circuit current (Ioc).
What is the concept of biomass energy?
Biogas energy and energy from bagasse.
Energy from bagasse, straw, sawdust, organic waste, energy wood.
Renewable fossil energy.
Energy including plants, animal waste, or any organic matter used as energy.
How is biogas produced?
Fermentation of organic matter with air from bagasse, organic waste.
Synthesis of gas.
Biogas is created by:
Fermenting organic matter with air from sugarcane waste, organic waste
Synthesizing natural gas through anaerobic digestion
All of the other answers are correct
Anaerobic digestion of animal and plant waste
The main components of biogas are:
Hydrogen (H2), Oxygen (O2), methane (CH4) and some other gases
Saturated hydrocarbons with carbon atom numbers less than 4 in the molecule and other gases
All of the other answers are correct
Methane (CH4), carbon dioxide (CO2) and some other gases
The pathways to produce biogas all create:
Fatty acids and glycerin
Amino acids and peptides
All components in the other three opinions
Acetic acid, formic acid, H2 and CO2
The potential for electricity generation from sugarcane waste in Vietnam according to the description of the general diagram 7 is:
About 1000 MW
About 2000 MW
About 1500 MW
About 500 MW
The main difficulties in investing in a power plant from sugarcane waste are:
Complex technology, high investment costs
Not enough sugarcane waste in the off-season for sugar production
Sugarcane waste has low heat generation while it can be used as raw material for other industries
The electricity purchase price from the national electricity system is low
The greatest advantage for the policy of developing energy from rice husks is:
Cheap raw material costs, easy collection and the market is still new
Rice husks have low moisture content, making it very convenient to convert into thermal energy
Developing energy from rice husks means developing agriculture, promoting the strengths of a purely agricultural country to maintain its leading position in rice export turnover
Abundant raw material sources and significant support from policies
In the KT1 biogas digester system, the digester has the function of:
Only contains gas from waste and maintains stable pressure of the product gas
Only contains waste and is where the decomposition process occurs to create biogas
Only contains wastewater after decomposition to ensure stable temperature for the entire process
Contains waste and biogas generated during anaerobic decomposition
Bagasse is used for electricity generation when:
Excess after selling to paper mills
Low quality bagasse to be used as fertilizer
Moisture content of bagasse is just enough to be used in incinerators
The electricity purchase mechanism is suitable for the investment policy of the plant
This is the biomass energy production model from:
Indirect incineration/co-firing system
Gasification system
Organic gasification system
Direct incineration/co-firing system
The electricity purchase price for projects using solid waste connected to the grid for direct solid waste incineration projects is:
9.35 UScents/kWh
5.35 UScents/kWh
9.5 UScents/kWh
10.05 UScents/kWh
What is the potential of commercial biomass energy?
The potential of biomass energy can be exploited for commercial purposes
The potential of biomass energy can be exploited and used
The potential of biomass energy can be sustainably exploited and used according to the physical rules of biomass and does not take into account the limitations in the approach and collection.
The potential of biomass energy is technical
This is the model of biomass energy production from:
Indirect combustion/co-combustion system
Inorganic gasification system
Organic gasification system
Gasification system (BIGCC)
What is the appropriate pH for the production of CH4 during the fermentation process?
6.0
6.8
6.5
7.0
5.6
How is biomass used to generate energy?
Production of heat and steam; Electricity production; Production of biodiesel
Production of heat and steam; Electricity production; Production of biofuels
Electricity production; Production of biodiesel
Production of heat and steam; Electricity production; Production of liquid fuels
Is municipal solid waste (MSW) considered a type of biomass?
No
Depends on the classification of waste
Depends on the type of municipality (local, central)
Yes
What is the concept of biomass gasification?
Biogas filtration from biomass burning at low temperature without oxygen (O2)
Biogas filtration from biomass burning at high temperature with oxygen (O2)
Biogas filtration from biomass burning at low temperature with oxygen (O2)
Biogas filtration from biomass burning at high temperature without oxygen (O2)
The gasification of biomass in an independent gasification chamber follows the steps in the following order:
Drying, oxidation, pyrolysis, reduction
Oxidation
What is the order of biomass gasification in an independent gasification chamber?
Drying, Oxidation, Pyrolysis, Reduction
Oxidation, Drying, Pyrolysis, Reduction
Drying, Reduction, Pyrolysis, Oxidation
Drying, Pyrolysis, Oxidation, Reduction
Which of the following biomass sources does not belong to the category of waste biomass?
Paper Industry Residues
Agricultural Residues
Forest Residues
Animal wastes
What types of energy crops are included?
Energy grasses, energy wood, industrial crops, agricultural crops
Chicken grass, sedge grass, mangrove trees, coffee trees, pepper trees
Energy grasses, energy wood, industrial crops, agricultural crops, saltwater algae
Energy grasses, energy wood, industrial crops, agricultural crops, aquatic plants
What fuel does a co-firing thermal power plant use?
Biomass and charcoal
Natural gas and charcoal
Coal and diesel
Coal and biomass
What are the two common types of biofuels?
Propanol and methanol
Biodiesel and Propanol
Methanol and Ethanol
Ethanol and biodiesel
What is the order of biogas production from the same weight of animal waste from most to least?
Dairy cows, beef cattle, pigs, chickens
Pigs, dairy cows, beef cattle, chickens
Pigs, beef cattle, dairy cows, chickens
Beef cattle, dairy cows, pigs, chickens
What is geothermal energy?
What is geothermal energy?
It is energy extracted from heat within the Earth's core.
This energy originates from the initial formation of the planet, from the radioactive decay of minerals, and from solar energy absorbed at the Earth's surface.
It is heat from within the earth.
It is heat from hot water. It is heat from hot rocks.
Which province was the first geothermal power plant project in Vietnam licensed?
Quang Tri.
Hoa Binh.
Quang Binh.
Lam Dong.
What main method does the current geothermal power plant use to generate electricity?
Using dry steam, flash steam, and binary cycle.
Using dry steam and hot geothermal water.
Using urban heat island effect.
Using water pumped down geothermal wells to create enough pressure to break rocks, releasing heat to produce hot water, steam to turn the turbine of the generator.
What are the applications of geothermal energy?
Electricity generation.
Direct use as thermal energy.
Geothermal heat pumps.
All three other answers are correct.
What are the applications of geothermal energy?
Electricity generation.
Direct use as thermal energy.
Geothermal heat pumps.
All three answers above.
What types of geothermal sources are there?
Geothermal basins, Earth's energy.
Brine, hot dry rocks.
Magma.
All three answers above.
What are the steps to implement a geothermal power project today?
What are the steps to implement a geothermal power project today?
Exploration and pre-survey - Drilling and testing wells - Developing a feasibility project - Implementing the construction site
Exploration and pre-survey - Drilling and testing wells - Implementing the construction site
Drilling and testing wells - Implementing the construction site
All of the above answers are incorrect.
What is the main purpose of geothermal energy in our country today?
Electricity generation, livestock farming, medical treatment.
Electricity generation, heating, tourism.
Electricity generation, air conditioning, hot water supply.
Bathing, swimming pools, tourism, making iodized salt, livestock farming, medical treatment, and bottling mineral water.
How is geothermal energy used to generate electricity?
Using high-temperature steam (>235°C) and some hot water from geothermal reservoirs. The steam will be directly led into the turbine through pipes to rotate the generator.
Using hot water at high pressure (>182°C) from geothermal reservoirs. This hot water at high temperature will naturally spout to the surface through wells due to its own pressure. During the process, the hot water is pumped into the generator, the pressure of the water decreases rapidly when it spouts near the ground. This pressure drop causes the hot water to completely evaporate and the steam generated will rotate the electricity turbine. The amount of hot water that does not evaporate will be pumped back down to the geothermal reservoir through the pumping well.
Using hot water with an average temperature ranging from 107-182°C from geothermal reservoirs, the geothermal fluid is led through one side of the heat exchanger to heat the secondary fluid in the adjacent pipe. The secondary fluid is usually an organic compound with a boiling point lower than that of water, such as Isob.
What are the typical applications of direct geothermal energy usage today?
Heating homes and greenhouses.
Used for aquaculture.
Industrial applications such as food drying, laundry, gold extraction, milk pasteurization, sauna.
What is the relatively stable temperature of the ground at 30cm on the surface of the Earth?
100-1600C.
10000C.
5000C.
50-1000C.
What are the basic components of a geothermal pump system?
Ground connection system.
Heat pump.
Heat transfer pipes.
How do geothermal power plants affect the environment?
Severe impact on the environment due to high CO2 emissions.
Emissions from geothermal power plants are equivalent to thermal power plants of the same capacity.
Significant impact on the environment due to high NO2 and H2S emissions.
Geothermal power plants meet strict environmental impact requirements and emit very little greenhouse gases. They only emit a very small amount of CO2, NO2, and H2S, only 1/50.
