Tag: biofuels

Questions Related to biofuels

The commonest source of bioenergy is

commercial applications bioenergy biofuels making biofuels technological and industrial development

  1. Gobar gas

  2. Charcoal

  3. Fuel wood

  4. Wood gas

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Correct Option: C

Energy plantation is

commercial applications bioenergy biofuels making biofuels technological and industrial development

  1. Growing starch/ sugar rich plants

  2. Growing latex rich plants

  3. Growing fuel wood trees

  4. Growing fruit plants

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Correct Option: C
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'.

Gasohol contains

commercial applications bioenergy biofuels making biofuels technological and industrial development

  1. $50-60\%$ alcohol

  2. $10-15\%$ alcohol

  3. $30-40\%$ alcohol

  4. $80-90\%$ alcohol

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Correct Option: B
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'.

Which one is not a petrocrop?

commercial applications bioenergy biofuels making biofuels technological and industrial development

  1. Euphorbia lathyrus

  2. Calotrophis Procera

  3. Jatropha

  4. Hardwickia binata

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Correct Option: D
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'.

Petroleum yielding plants belong to

commercial applications bioenergy biofuels making biofuels technological and industrial development

  1. Euphorbiaceae

  2. Apocynaceae

  3. Asclepiadaceae

  4. All of the above

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Correct Option: D

Fuel wood required per person per day is

commercial applications bioenergy biofuels making biofuels technological and industrial development

  1. $0.36$kg

  2. $30$kg

  3. $10$kg

  4. $1$kg

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Correct Option: A

Maximum alcohol production per hectare of crop is from

commercial applications bioenergy biofuels making biofuels technological and industrial development

  1. Potato

  2. Sugracane

  3. Sugarbeet

  4. Tapioca

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Correct Option: C
Explanation:

The amount of alcohol production per hectare of given crop is:

Potato - 396 gallons

Sugarcane - 662 gallons

Sugarbeet - 714 gallons

Tapioca - 410 gallons

Hence, maximum alcohol production is by sugarbeet.

So, the correct answer is 'Sugarbeet'.

Biodiesel is obtained from

commercial applications bioenergy biofuels making biofuels technological and industrial development

  1. Jatropha biloba

  2. Cedrus deodara

  3. Jatropha curcas

  4. None of these

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Correct Option: C

The plant which is not a component of energy cropping is

commercial applications bioenergy biofuels making biofuels technological and industrial development

  1. Sugarcane

  2. Sugarbeet

  3. Tapioca

  4. Euphorbia

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Correct Option: D
Explanation:
Energy cropping is the cultivation of those plants which can be harvested to produce ethanol or bioethanol that can be used as a biofuel. Energy crops include sugarcane, sugarbeet, cassava (Tapioca), wheat, maize etc. Euphorbia is not an energy crop. Instead, it is a petro-crop or petroleum plant because it produces latex that has long chain hydrocarbons. This latex can be converted into biofuels and used as a substitute for petrol and other fuels.
So, the correct answer is 'Euphorbia'.

Product obtained from which family can be alternative to liquid fuel?

commercial applications bioenergy biofuels making biofuels technological and industrial development

  1. Asclepiadaceae

  2. Leguminosae

  3. Solanaceae

  4. Liliaceae

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Correct Option: A