Tag: bioenergy

Quizzes (9) Questions (112)

Questions Related to bioenergy

Multiple choice zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

Match and find the correct combination.

(a) Fermenting malted cereals and fruit juice (i) Clots in Blood vessels
(b) Production of large holes in Swiss cheese (ii) Digestion of sludge by bacteria and fungi resulting in emission methane and other gases
(c) Myocardial infarction (iii) Production of ethanol
(d) Biogas (iv) Blood cholesterol lowering agent
(v) Production of large amount of CO$ _2$

  1. a-iii, b-v, c-iv, d-ii

  2. a-i, b-ii, c-iii, d-iv

  3. a-iii, b-v, c-i, d-ii

  4. a-v, b-iv, c-iii, d-ii
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

(a) Fermenting malted cereals produces ethanol (iii). (b) Swiss cheese production involves CO2 release (v). (c) Myocardial infarction is associated with blood clots (i). (d) Biogas involves sludge digestion (ii).

Multiple choice zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

Identify the correct pair of characters of a bacterium which is used in the production of methane.
(i)   Recyclers of inorganic nutrients
(ii)  Present in stomach of cattle
(iii) Obtain energy from sunlight
(iv) Aerobes

  1. ii, iii

  2. i, ii

  3. i, iv

  4. iii, iv
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Methanogens are anaerobic bacteria (not aerobes) that recycle inorganic nutrients and are found in the rumen of cattle to aid in cellulose digestion.

Multiple choice zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

The order of bacteria active in conversion of organic wastes into biogas is

  1. Hydrolytic $\rightarrow$ Acetogenic $\rightarrow$ Methanogenic
  2. Methanogenic $\rightarrow$ Acetogenic $\rightarrow$ Hydrolytic
  3. Methanogenic $\rightarrow$ Hydrolytic $\rightarrow$ Acetogenic
  4. Acetogenic $\rightarrow$ Methanogenic $\rightarrow$ Hydrolytic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The order of bacteria active in the conversion of organic wastes into biogas is hydrolytic, acetogenic, methanogenic. 

Hydrolytic- Insoluble organic polymers, such as carbohydrates, are broken down to soluble derivatives which are used by bacteria.

Acetogenic- Acidogenic bacteria then convert the sugars and amino acids into carbon dioxide, hydrogen, ammonia, and organic acids. These bacteria convert these resulting organic acids into acetic acid, along with additional ammonia, hydrogen, and carbon dioxide.

Methanogenic- The methanogens convert the product of acetogenic step to methane and carbon dioxide. The produced gas consisting of methane, carbon dioxide, and traces of other ‘contaminant’ gases is known as biogas.

So, the correct answer is 'Hydrolytic $\rightarrow$ Acetogenic $\rightarrow$ Methanogenic'.

Multiple choice zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

Biogases produced during sewage treatment are 

  1. ${H} _{2}S, \,{N} _{2}, \,{CH} _{4}$
  2. ${CH} _{4}, \,{H} _2{S}, \,{CO} _{2}$
  3. ${CH} _{4}, \,{O} _{2}, \,H _2S$
  4. $H _2S, \,CH _4, \,SO _2$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Biogases produced during sewage treatment are

1.Methane (CH$ _4$)
2.Hydrogen sulfide (H$ _2$S)
3.Carbon-dioxide (CO$ _2$).
So, the correct option is 'CH$ _4$, H$ _2$S, CO$ _2$'.

Multiple choice zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

Cytophaga and Cellulomonas are involved in

  1. Biogas production

  2. Spoilage of textiles

  3. Curing of tea and tobacco

  4. Cheese manufacture
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cytophaga is a genus of Gram-negative bacillus. Cellulomonas is a genus of Gram-positive bacillus. They have the ability to digest cellulose. They are called as cellulolytic bacteria. They are involved in biogas production. 

Thus, the correct answer is 'Biogas production.'

Multiple choice commercial applications bioenergy biofuels making biofuels technological and industrial development

Energy plantation is

  1. Growing starch/ sugar rich plants

  2. Growing latex rich plants

  3. Growing fuel wood trees

  4. Growing fruit plants
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Energy plantation is growing species of trees and shrubs which can be harvested in a short period of time and can be used for fuel. Plant material can be used as solid fuel by burning wood or they can be converted into other forms like methane by biological activities like decomposition. Also, fuel wood is renewable source of energy and doesn't release harmful pollutants in the atmosphere.
So, the correct answer is 'Growing fuel wood trees'.
Multiple choice commercial applications bioenergy biofuels making biofuels technological and industrial development

Gasohol contains

  1. $50-60\%$ alcohol
  2. $10-15\%$ alcohol
  3. $30-40\%$ alcohol
  4. $80-90\%$ alcohol
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Gasohol is a mixture of gasoline and alcohol (generally the composition of mixture is 9:1 for gasoline and alcohol i.e. 90% gasoline and 10% alcohol. It is used as fuel in engines. In many countries, gasohol is used as an alternative fuel in engines. The advantage of using gasohol is that there is less emission of pollutants because gasohol burns slowly and completely. However, alcohol based gasohol is expensive so it is not commonly used.
So, the correct answer is '10- 15% alcohol'.
Multiple choice commercial applications bioenergy biofuels making biofuels technological and industrial development

Which one is not a petrocrop?

  1. <p>Euphorbia lathyrus</p>

  2. <p>Calotrophis Procera
    </p>

  3. <p>Jatropha</p>

  4. <p>Hardwickia binata</p>
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Petro-crops are plants that produce latex, containing long chain hydrocarbons, which can be converted into biofuels and used as alternatives in place of petrol or other engine fuels. Euphorbia lathyrus and Calotrophis procera produce latex which is converted into biofuel that has similar composition of hydrocarbons like that of crude oil or other fuels. Jatropha seeds produce oil which is converted into biodiesel and used as an alternative for engine fuels. 
Hardwickia binata, commonly known as anjan, is a deciduous ornamental tree.
So, the correct answer is 'Hardwickia binata'.