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