Tag: commercial applications

Questions Related to commercial applications

What is the ratio of CH$ _4$ in a biogas?

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  1. 1:2

  2. 1:3

  3. 2:1

  4. 3:1

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Correct Option: D
Explanation:

CH$ _4$ is methane, which is the major component of biogas. Ratio is 3:1. 

75% of biogas is methane which is an inflammable fuel. Biogas is characterized based on its chemical composition and the physical characteristics which result from it. It is primarily a mixture of methane (CH$ _4$) and inert carbonic gas (CO$ _2$). However the name “biogas” gathers a large variety of gases resulting from specific treatment processes, starting from various organic waste - industries, animal or domestic origin waste, etc 
Thus, the correct answer is option D.

Biogas contains

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  1. Traces of CH$ _4$

  2. 30-40% of CH$ _4$

  3. 50-70% of CH$ _4$

  4. 80% of C$ _2$H$ _6$

Show answer
Correct Option: C
Explanation:
Biogas is a mixture of methane and carbon dioxide produced by bacterial degradation of organic matter and used as a fuel.
Biogas is comprised primarily of methane and carbon dioxide. 
It contains methane (50-70%), carbon dioxide (30-50%), and very small amounts of hydrogen and hydrogen sulphide. 
Biogas typically refers to a (biofuel) gas produced by the anaerobic digestion or fermentation of organic matter including manure, sewage sludge, municipal solid waste, biodegradable waste or any other biodegradable feedstock, under anaerobic conditions. 
Thus, the correct answer is option C.

Bioenergy is the energy obtained from

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  1. Forest products

  2. Coal

  3. Petroleum

  4. All of the above

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Correct Option: D

Advantage of energy plantations is

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  1. Running nuclear plants

  2. To reduce pressure on fossil fuel

  3. To decrease soil erosion and pollution

  4. Both B and C

Show answer
Correct Option: D
Explanation:

Energy plantation is the method in which there is the cultivation of certain species of the plants which can be used as the source of energy. They can be used as an alternative to the fossil fuels. This reduces the pressure on the fossil fuels. 

Due to the plantation, there is the decrease in the problems like soil erosion. The pollution caused due to the decrease in the number of trees is also reduced.
Thus, the correct answer is option D. 

Asia's largest wind farm using wind waves for generating power is at

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  1. Kyota (Japan)

  2. Lamba (Gujrat)

  3. Kazakistan

  4. Pokhran (India)

Show answer
Correct Option: B
Explanation:

The Wind is an inexhaustible source of energy. Asia's largest windmill or wind farm complex is established at Lamba village in the Jamnagar district of Gujrat. It had successfully generated 1500+ kWh in its pilot stage of 3 months. Thus the correct answer is option B.

Solar cell can be used for sufficient amount of

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  1. Storing water

  2. Storing light

  3. Storing sun rays as energy source

  4. None of the above

Show answer
Correct Option: C
Explanation:

The device which can trap the solar energy and convert the solar energy into an electrical form of energy is called as the solar cell. Solar cells are generally used for the storage of the radiations from the sun in the form of energy resource. These cells are used in the solar panels for the generation of electricity for the street lights. 

Thus, the correct answer is option C. 

Thermal pollution in water bodies is caused due to discharge of

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  1. Waste from agricultural fields

  2. Hot water from power plants

  3. Hot chemicals from industries

  4. Waste from mines

Show answer
Correct Option: B
Explanation:

Thermal pollution is caused by change in water temperature which leads to degradation of water quality. It is caused due to use of water as a coolant by power plants and industrial manufacturers. When such water is returned to the natural environment at a higher temperature, it decreases oxygen supply and affects ecosystem composition.

So, the correct answer is option B.

The land of wind mills using wind waves as a source of power is

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  1. Netherland

  2. India

  3. Japan

  4. Hong Kong

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Correct Option: A
Explanation:

Netherland is referred as the land of the windmills. There are many windmills installed in the regions called as wind farms. There are large turbines which are used for the conversion of the wind energy to produce electricity. About 3400 MW energy was produced in this region with the help of windmills.

Thus, the correct answer is option A. 

Geothermal energy is produced in India from hot springs by a 5 KW geothermal power plant at

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  1. Manikaran (HP)

  2. Puga (Ladhakh)

  3. Gulfs of Kutch

  4. Ankleshwar

Show answer
Correct Option: A
Explanation:
Geothermal energy is energy from the shallow ground hot water and hot rock found some miles or deeper to the extremely high temperatures of molten rock called magma. Geothermal activity in the Parbati Valley is due to the hot springs at Manikaran, a village situated on the banks of Parbati river in Himachal Pradesh. Thus the correct answer is option A.

Power and manure both are provided by ________

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  1. Thermal plant

  2. Nuclear plant

  3. Biogas plant

  4. Hydroelectric plant

Show answer
Correct Option: C
Explanation:

In a biogas plant, household wastes and biowastes can be disposed of usefully and in a healthy manner to obtain biogas a renewable source of energy, which is used as a fuel because it reacts with oxygen and  releases energy, which is clean in nature. Also the residue of the plant can be used as a manure.