Tag: commercial applications

Questions Related to commercial applications

What are the advantage of gobar gas over conventional utilization?

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. More efficient source of energy

  2. Used as good fertilizer

  3. Reduces the chances of spreading of pathogens

  4. All of the above

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Correct Option: D

Best economic method to harvest the solar energy is

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. Solar cell

  2. Energy plantation

  3. Cultivation of sugar cane then energy obtain by burning it

  4. Solar cooker

Show answer
Correct Option: B
Explanation:

The economics of terrestrial growth of vegetation for its energy content is far more favourable than other more technically sophisticated methods of large-scale solar energy conversion. The most traditional is to use the ability of plants to convert the suns energy into fuel molecules; this is cheap, deployable at scale, and provides the energy in easily storable form, but its not very efficient and so needs a lot of land.

Gobar gas contains mainly

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. CH$ _{4}$ + CO$ _{2}$

  2. CH$ _{4}$ + O$ _{2}$

  3. CO$ _{2}$ + H$ _{2}$

  4. CO$ _{2}$ + SO$ _{2}$

Show answer
Correct Option: A
Explanation:

Biogas (gobar gas) is primarily methane (CH$ _4$) and carbon dioxide (CO$ _2$) and may have small amounts of hydrogen sulphide (H$ _2$S), moisture and siloxanes.

Thus, the correct answer is option A.

Biogas consists of

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. Carbon monoxide, methane and hydrogen.

  2. Carbon dioxide, methane and hydrogen.

  3. Carbon monoxide, ethane and hydrogen.

  4. Carbon dioxide, ethane and hydrogen.

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Correct Option: B
Explanation:

Biogas consists mostly of methane (CH$ _4$), carbon dioxide (CO$ _2$) and a mix of trace gases including nitrogen, hydrogen sulfide (H$ _2$S), hydrogen and others. Methane is the main constituent (63%) of the biogas. The other major constituent is CO$ _2$ (30%).

Thus, the correct answer is option B.

There is a high accumulation of garbage in the past recent days in Bangalore. What would you suggest to the government as to how could the garbage be converted into cooking gas by decomposing. Which organism is involved in the process of conversion?

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. Klebsiella

  2. Yeast

  3. Methanogen

  4. Clostridium

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Correct Option: C
Explanation:
Methanogens convert organic products to methane and carbon dioxide. The methanogenic archaea populations play an indispensable role in anaerobic wastewater treatments. It is used as part of the process to treat biodegradable waste and sewage sludge. As part of an integrated waste management system, anaerobic digestion reduces the emission of landfill gas into the atmosphere. 
Therefore, the correct answer is option C.

Bio-gas can be converted into _______.

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. Fuel

  2. Electricity

  3. Fertilizer

  4. Both A and B

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Correct Option: D
Explanation:

Material recovery is possible from industrial waste. Organic waste can be used for energy production with various processes such as bio-gas production.

Common energy source in villages is

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. Electricity

  2. Coal

  3. Biogas

  4. Wood and animal dung

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Correct Option: D
Explanation:
Energy is the most important constituents of the living part of the human being.
Now we can generate energy in different ways like hydropower, wind energy, biogas, and many more but today also in villages the trend is being used for producing energy by using wood and animal dung.
So, the correct answer is 'Wood and animal dung'

An inexhaustible non-conventional universal source of energy is

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  1. Wind energy

  2. Solar energy

  3. Hydrothermal energy

  4. Tidal energy

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Correct Option: B
Explanation:

Solar energy is considered to be the non-conventional because it is not derived from the conventional fossil fuels. It is inexhaustible as it will not be used up completely. It will not take much time in regeneration. It is universal as most of the places on earth that sustain a large population get the sunlight. Wind energy is also non-conventional and inexhaustible but it is not available to every area. It can be harnessed in areas that witness a low pressure, like equatorial and tropical areas. Similarly, the tidal energy is available to the coastal areas. Hydrothermal resources are available everywhere but need a heavy economic investment for their usage.

Hence, the correct answer is 'Solar energy'.

Photovoltaic cells are semiconductors of

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  1. Silicon

  2. Gallium arsinide

  3. Cadmium telluride

  4. All of the above

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Correct Option: D
Explanation:

Photovoltaic cells are used in trapping solar energy. These are made of semiconductors that can lose the electrons when exposed to the sunlight to generate the electric current. The semiconductor material used can be silicon, gallium arsenide, cadmium telluride. Silicon is the most preferred because of its uniform crystalline structure. Cadmium Telluride provides a low-cost alternative that is also highly absorptive of solar energy. Gallium arsenide is used for its resistance to the harmful effects of the radiations. It is generally used for space photovoltaic cells.

Hence, the correct answer is 'All of the above'

Solar energy can be trapped through

commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

  1. Direct heating

  2. Thermoelectric conversion

  3. Photovoltaic conversion

  4. All of the above

Show answer
Correct Option: D
Explanation:

Solar energy can be trapped through the following:

A. Direct heating of the solar energy uses pumps and fans to circulate the heat gathered by the solar collectors. It is widely used in water heating system.
B. Thermoelectric conversion converts the solar energy directly to the electrical energy by creating a voltage effect due to the difference in the temperature.
C. Photovoltaic conversion produces electricity through solar energy by maintaining an electron flow. The release of electrons when exposed to sunlight creates an electric current along the path of the electron movement.
Hence, the correct answer is 'All of the above'