Free Agricultural/Bioengineering Renewable Energy Questions and Answers — Questions and Answers

Question 1: Energy Resources are categorized into ____ based on usefulness.

primary and secondary resources
primary, secondary and tertiary resources
primary, intermediate and secondary resources (Correct answer)
primary, secondary, intermediate and tertiary resources

Correct answer: primary, intermediate and secondary resources

Energy resources are commonly categorized based on their state of processing and origin. Primary resources are found directly in nature (e.g., crude oil, coal, solar radiation). Secondary resources are derived from primary resources through conversion processes (e.g., electricity, gasoline). The term 'intermediate resources' can refer to energy forms that have undergone some initial processing but are not yet final energy carriers, serving as inputs for further transformation within the energy supply chain.

Question 2: What category of resource is not one of the ones listed below?

Sunlight
Coal
Crude Oil
Hydrogen Energy (Correct answer)

Correct answer: Hydrogen Energy

Sunlight, coal, and crude oil are all classified as primary energy resources because they are found naturally in the environment and can be directly harvested or extracted. Hydrogen, however, is not a primary energy source; it does not occur freely in significant quantities on Earth. Instead, hydrogen must be produced from other compounds (like water or natural gas) using energy, making it an energy carrier or a secondary energy resource rather than a naturally occurring primary resource.

Question 3: The energy gained from a raw energy source divided by the energy required to access the source is known as the ____ ratio.

fuel ratio
joule ratio
consumption ratio
energy yield ratio (Correct answer)

Correct answer: energy yield ratio

The energy yield ratio, also known as Energy Return On Energy Invested (EROEI), quantifies the amount of usable energy gained from a source relative to the energy expended to obtain it. A higher ratio indicates a more efficient and sustainable energy source. This metric is crucial for evaluating the net energy contribution and economic viability of different energy production methods.

Question 4: Energy Resources are those that have been in use for a long time.

fuel cells
primary energy sources
conventional energy sources (Correct answer)
non-conventional energy sources

Correct answer: conventional energy sources

Conventional energy sources are those that have been widely used for a long time and are well-established in global energy infrastructure. These typically include fossil fuels like coal, oil, and natural gas, as well as large-scale hydropower and nuclear energy. They are characterized by their historical prevalence and significant contribution to the world's energy supply.

Question 5: Which of the following claims about solar energy is true?

It is a non-renewable source of energy
It is a renewable and conventional source of energy
It is a non-renewable and non-conventional source of energy
It is a renewable and non-conventional source of energy (Correct answer)

Correct answer: It is a renewable and non-conventional source of energy

Solar energy is classified as a renewable source because it harnesses energy from the sun, which is inexhaustible on a human timescale. It is also considered non-conventional because, despite its potential, it has not been a primary, widespread energy source for as long as fossil fuels and large-scale hydropower, and its widespread adoption is a more recent development. This distinguishes it from traditional, conventional sources.

Question 6: Plants that produce renewable energy need _______ than conventional generators.

more uranium
more fuel
less maintenance (Correct answer)
higher operating cost

Correct answer: less maintenance

Plants that produce renewable energy, such as solar or wind farms, often require less maintenance compared to conventional generators like fossil fuel power plants. They typically have fewer moving parts or simpler operational processes, leading to reduced wear and tear and lower ongoing operational costs. This advantage contributes to their long-term economic viability and sustainability.

Question 7: The majority of renewable energy sources come from _______ .

polluting
highly efficient
universally available
location-specific (Correct answer)

Correct answer: location-specific

The majority of renewable energy sources are inherently location-specific, meaning their availability and efficiency depend heavily on geographical factors. For instance, solar power requires ample sunlight, wind power needs consistent strong winds, and hydropower relies on suitable water bodies and elevation changes. This characteristic necessitates careful site selection and can limit their universal applicability without extensive transmission infrastructure.

Question 8: The rise in global energy demand is caused by ______ .

natural calamities
inflation
deforestation
increasing population and Industrialization (Correct answer)

Correct answer: increasing population and Industrialization

The rise in global energy demand is primarily driven by increasing population and rapid industrialization worldwide. A larger population requires more energy for residential use, transportation, and food production, while industrial growth fuels demand for manufacturing, infrastructure development, and economic expansion. These factors collectively place immense pressure on existing energy supplies and drive the search for new sources.

Question 9: Which of the following describes how hydropower is disadvantageous?

They cause harmful emissions
They cause deforestation and affect wildlife (Correct answer)
They are not suitable for long-distance electricity transmission
They are an unstable source of energy

Correct answer: They cause deforestation and affect wildlife

A significant disadvantage of hydropower is its potential to cause deforestation and negatively affect wildlife. The construction of large dams for hydropower often requires flooding vast areas, leading to the destruction of forests and natural habitats. This can displace or endanger numerous species, alter river ecosystems, and impact local biodiversity.

Question 10: Which of the following claims concerning traditional energy sources is accurate?

They are available in limited quantity (Correct answer)
They cause minimum pollution
There are sufficient reserves of Coal, Petroleum and Natural gas for the next 300 years
Coal is the most used conventional energy source in the world

Correct answer: They are available in limited quantity

Traditional energy sources, predominantly fossil fuels like coal, petroleum, and natural gas, are available in limited quantities because they are non-renewable. These resources formed over millions of years and are being consumed at a much faster rate than they can be replenished. Their finite nature is a major concern for long-term energy security and sustainability.

Question 11: Which of the following pollutants are released when fossil fuels are burned?

Noble Gases
Oxides of Carbon, Nitrogen, and Sulphur (Correct answer)
Oxides of Carbon, Uranium, and Radium
Calcium Halides and Oxides of Nitrogen

Correct answer: Oxides of Carbon, Nitrogen, and Sulphur

When fossil fuels are burned, they release a range of pollutants into the atmosphere, primarily oxides of carbon (like CO2 and CO), nitrogen (NOx), and sulphur (SOx). These gases contribute to air pollution, acid rain, and the greenhouse effect, leading to climate change. Their emission is a major environmental concern associated with conventional energy production.

Question 12: The chemical, pharmaceutical, and paint industries all employ _____, a petrochemical, as a raw material.

Protactinium
Coal (Correct answer)
Uranium
Plutonium

Correct answer: Coal

While coal is primarily known as a fuel for electricity generation, it is also a crucial raw material in various industries, including chemical, pharmaceutical, and paint manufacturing. Through processes like gasification and liquefaction, coal can be converted into a wide array of chemicals, making it a versatile petrochemical feedstock. This highlights its importance beyond just energy production.

Question 13: Power plants using renewable energy have

fuel storage tanks
negligible production capacity
low energy availability
negligible fuel cost (Correct answer)

Correct answer: negligible fuel cost

Power plants using renewable energy sources, such as solar, wind, or hydro, have negligible fuel costs because their "fuel" (sunlight, wind, water flow) is naturally occurring and free. Unlike fossil fuel plants that incur significant expenses for purchasing and transporting coal, oil, or gas, renewable plants primarily have upfront capital costs and ongoing maintenance, leading to lower operational expenses over their lifespan.

Question 14: Since the past 150 years, which of the following has contributed to global warming?

Emissions of aerosols
Emissions of sulphur
Ice age greenhouse gas emission
Anthropogenic greenhouse gas emissions (Correct answer)

Correct answer: Anthropogenic greenhouse gas emissions

Since the past 150 years, the primary contributor to global warming has been anthropogenic greenhouse gas emissions. Human activities, particularly the burning of fossil fuels for energy, industrial processes, and deforestation, have released unprecedented amounts of gases like carbon dioxide, methane, and nitrous oxide into the atmosphere. These gases trap heat, leading to a significant increase in global temperatures.

Question 15: What among the following is to blame for global warming?

Melting metals
Burning of biomass
Burning of fossil fuels (Correct answer)
Releasing CFCs into the atmosphere

Correct answer: Burning of fossil fuels

The burning of fossil fuels (coal, oil, and natural gas) is the leading cause of global warming. This process releases large quantities of carbon dioxide and other greenhouse gases into the atmosphere, which trap heat and lead to an increase in Earth's average temperature. While other factors contribute, fossil fuel combustion is the dominant driver of current climate change.

Question 16: What is the primary issue with wind power?

Compact and does not require large area of land
Requires large area of land (Correct answer)
It is a renewable source of energy
Generates energy from wind

Correct answer: Requires large area of land

A primary issue with wind power is that it requires a large area of land for the installation of wind turbines, especially for utility-scale projects. To generate significant amounts of electricity, numerous turbines must be spaced out to capture wind effectively, leading to substantial land use. This can sometimes conflict with other land uses, such as agriculture or conservation, and raise concerns about visual impact.

Free Agricultural/Bioengineering Renewable Energy Questions and Answers

Energy Resources are categorized into ____ based on usefulness.