Tag: solar energy and its applications

Questions Related to solar energy and its applications

Which of the following is not a solid fuel?

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. Coke

  2. Coal

  3. Charcoal

  4. Kerosene

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Correct Option: D
Explanation:

Kerosene is a hydrocarbon liquid which is highly combustible. Also known as lamp oil it is used as fuel in industry as well as households.

What substance is obtained as a residue when wood is burned in a limited supply of air?

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. water

  2. carbon dioxide

  3. methane

  4. charcoal

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Correct Option: D
Explanation:

Method used for the formation of charcoal is thermal pyrolysis.It is a processes involved in charring of wood.

The efficiency of traditional chulhas is:

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. $8 - 10$%

  2. $12-14$ %

  3. $20-22$ %

  4. $25-27$ %

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Correct Option: A
Explanation:

The traditional chulha provides a low thermal efficiency. The efficiency of the traditional chulhas is usually around $8-10$%

Select the odd one out (kerosene, petrol, diesel, water)

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. water

  2. kerosene

  3. petrol

  4. diesel

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Correct Option: A
Explanation:

All are fuels except water

Firewood is a conventional source of energy. This statement is:

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. True

  2. False

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Correct Option: A
Explanation:

Firewood is a conventional source which is non-renewable.

Conventional resources are:

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. Renewable

  2. Non-renewable

  3. Inexhaustible

  4. Clean

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Correct Option: B
Explanation:

Conventional resources are non-renewable resources. They cannot be replenished in foreseeable future.

The term Black gold is used for:

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. coal

  2. petroleum

  3. graphite

  4. charcoal

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Correct Option: B
Explanation:

Oil and petroleum are referred to as black gold. When extracted, it is black in colour, however, its market value is very high like gold.


From below, which are the examples of conventional energy?

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. Coal

  2. Wood

  3. Wind

  4. Solar

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Correct Option: A,B
Explanation:

Conventional sources : wood, coal, fossil fuels.

Non-conventional sources: wind, thermal, solar, tidal.

Heating value of coal is approximately -

biology energy management fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. 1000-2000 kcal/kg

  2. 2000-4000 kcal/kg

  3. 5000-6500 kcal/kg

  4. 9000-10,500 kcal/kg.

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Correct Option: C
Explanation:

Heating value of coal is approximately $5000-6500 $  $kcal/kg$

Which of the following is NOT a fossil fuel?

evs solar energy fuels and fossil fuels solar energy and its applications electric energy generation and environment

  1. Wood

  2. Coal

  3. Petroleum

  4. Natural gas

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Correct Option: A
Explanation:

Fuels formed due to the decomposition of dead animals and organic matter mainly in an anaerobic condition millions of years ago are fossil fuels. Coal, natural gas and petroleum are fossil fuels.