This set of Basic Energy Engineering Questions and Answers focuses on “Energy from Biomass”.
1. Which is an organic matter produced by plants in direct or indirect forms?
a) Solar energy
b) Biomass
c) Wind energy
d) Bio-fuel
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Explanation: Biomass is an organic matte produced by plants in direct or indirect forms. Energy from biomass has got very large potential which can substitute the conventional energy sources. Biomass with conversion systems can be used for variety of applications including power generation.
2. What type of energy is biomass energy?
a) Conventional energy
b) Non renewable
c) Commercial energy
d) Sustainable energy
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Explanation: Biogas is renewable energy source. Biomass energy from plants and plant derived materials. Wood is still the largest biomass energy resource today, but other sources of biomass can also be used.
3. The use of biomass energy has the potential to greatly reduce greenhouse gas emissions.
a) True
b) False
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Explanation: The use of biomass energy has the potential to greatly reduce greenhouse gas emissions. Burning biomass releases about the same amount of carbon dioxide as burning fossil fuels. However, fossil fuels release carbon dioxide captured by photosynthesis millions of years ago an essentially “new” greenhouse gas.
4. __________ is made by combining alcohol with vegetable oil, animal fat or recycled cooking grease.
a) Biodiesel
b) Biomass
c) Bioelectricity
d) Syngas
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Explanation: Biodiesel is made by combining alcohol with vegetable oil, animal fat or recycled cooking grease. It can be used as an additive to reduce vehicle emissions or in its pure form as a renewable alternative fuel for diesel engines.
5. What type of fire system is used in Bio power?
a) Hand firing
b) Mechanical stoke firing
c) Direct firing
d) Indirect firing
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Explanation: Most of the bio power plants are direct fired systems. They burn bio energy feed stocks directly to produce steam. This steam drives a turbine, which in turns a generator that converts the power into electricity.
6. Mixing biomass with fossil fuels in conventional power plants is referred to as ___________
a) Agitation
b) Infuse
c) Co-firing
d) Interbreed
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Explanation: Co-firing refers to mixing biomass with fossil fuels in conventional power plants. Coal fired power plants can use co-firing systems to significantly reduce emissions, especially sulfur dioxide emissions.
7. Which gas can be chemically converted into other fuels or products, burned in a conventional boiler, or used instead of natural gas in gas turbine?
a) Freon
b) Natural gas
c) Syngas
d) Noble gas
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Explanation: The synthesis gas or Syngas can be chemically converted into other fuels or products, burned in a conventional boiler, or used instead of natural gas in gas turbine. Gas turbines are very much like jet engines, only they turn electric generators instead of propelling a jet.
8. What does natural decay of biomass produces?
a) Ozone
b) Methane
c) Ethane
d) Hydrogen
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Explanation: The natural decay of biomass produces methane, which can be captures and used for power production. In landfills, wells can be drilled to release the methane from decaying organic matter. Then pipes from each well’s carry the methane to a central point, where it is filtered and cleaned before burning.
9. What is used to decompose organic matter in absence of oxygen in closed reactors?
a) Slugs
b) Fungi
c) Natural consortia
d) Methane
View Answer
Explanation: Methane can also be produced from biomass through a process called anaerobic digestion. Natural consortia of bacteria are used to decompose organic matter in the absence of oxygen in closed reactors.
10. What is Ethanol called?
a) Phenol
b) Alcohol
c) Amino acid
d) Butanol
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Explanation: Ethanol is also called as an alcohol. In biomass, it is made by fermenting any biomass high in carbohydrates through a process similar to beer brewing. Ethanol is also made from starches and sugars.
11. Which type of bio products include Antifreeze, plastics, glues, artificial sweeteners, and gel for toothpaste?
a) Bio products made from sugars
b) Bio products made by waste products
c) Bio products made from decomposition
d) Bio products made from catalytic cracking
View Answer
Explanation: Bio products that can be made from sugars include antifreeze, plastics, glues, artificial sweeteners, and gel for toothpaste. Bio products that can be made from carbon monoxide and hydrogen of Syngas include plastics and acids, which can be used to make photographic films, textiles, and synthetic fabrics.
12. What is BTU used to measure?
a) Heat content
b) Area
c) Density
d) Volume
View Answer
Explanation: The British thermal unit (Btu or BTU) is a traditional unit of heat; it is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. Its counterpart in the metric system is the calorie, which is defined as the amount of heat required to raise the temperature of one gram of water by one degree Celsius.
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