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Kinjal ray
Kinjal ray
@kinjal-ray
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Joined: Nov 6, 2020
Last seen: Sep 30, 2021
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Answer to: A fuel is a good one if its ___________ value is high.

A fuel is a good one if its Butane value is high.

5 years ago
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Sources of Energy
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Answer to: Mirrors used for solar cooker are ___________.

Mirrors used for solar cooker are convex.

5 years ago
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Sources of Energy
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Answer to: Assertion: Non-conventional sources of energy are the major source of energy for generating electricity in power plants. Reason: Coal and petroleum are non-conventional energy sources.

(d) The statement of the Assertion is false but the Reason is true.

5 years ago
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Sources of Energy
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Answer to: Assertion: Coke is a better fuel than coal. Reason: Burning of coke cause air pollution.

(c) Assertion is true but the Reason is false.

5 years ago
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Sources of Energy
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Answer to: Assertion: Wind energy farms cannot be established every where. Reason: The wind energy farms can be established only at those places where wind blows for most part of the year.

(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

5 years ago
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Sources of Energy
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Answer to: Assertion: The major constituent of biogas is methane. Reason: Biogas is produced by the aerobic degradation by animal wastes like cow ding in the presence of water.

(c) Assertion is true but the Reason is false.

5 years ago
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Sources of Energy
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Answer to: Assertion: Fuel has to be burnt to obtain heat energy. Reason: The minimum temperature to which a fuel must be heated so that it may catch fire and start burning is known as ignition temperature.

(b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.

5 years ago
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Sources of Energy
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Answer to: Spent slurry (Bio-waste after obtaining biogas) is used as

(b) manure

5 years ago
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Sources of Energy
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Answer to: One major problem in harnessing nuclear energy is (a) converting nuclear energy into electrical energy. (b) sustaining the reaction.

(d) disposing off spent fuel easily.

5 years ago
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Sources of Energy
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Answer to: A device in which electricity is produced by the process of controlled nuclear fission reaction is called (a) nuclear chain reaction (b) hydel power plant (c) nuclear reactor (d) thermal power plant

(c) nuclear reactor

5 years ago
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Sources of Energy
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Answer to: Ocean thermal energy is produced due to (a) pressure difference at different levels in the ocean. (b) temperature difference at different levels in the ocean. (c) energy stored by waves in the ocean. (d) tides rising out of the ocean.

(b) temperature difference at different levels in the ocean.

5 years ago
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Sources of Energy
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Answer to: Which element is used in solar cells? (a) Carbon (b) Silicon (c) Phosphorous (d) Sulphur

(b) Silicon

5 years ago
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Sources of Energy
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Answer to: Which of the following gases is the main constituent of natural gas?

(a) Methane

5 years ago
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Sources of Energy
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Answer to: Which of the following is the ultimate source of energy? (a) Water (b) Sun (c) Fossil fuels (d) Uranium

(b) Sun is the ultimate source of energy.

5 years ago
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Sources of Energy
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Answer to: Solar energy can be directly converted to electrical energy by which of the following devices?

(c) solar cell

5 years ago
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Sources of Energy
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Answer to: Biogas is formed in the (a) presence of air only (b) presence of water only (c) absence of air only (d) presence of water and absence of air

(d) presence of water and absence of air

5 years ago
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Sources of Energy
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Answer to: Unit of calorific value of a substance is (a) Kcal (b) Joules (c) J kg (d) J/kg

Unit of calorific value of a substance is J/kg.

5 years ago
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Sources of Energy
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Answer to: The variety of coal which has the highest carbon content (a) Anthracite (b) Peat (c) Bituminous (d) Lignite

(a) Anthracite

5 years ago
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Sources of Energy
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Answer to: A good fuel should possess (a) high ignition temperature (b) moderate ignition temperature (c) high calorific value (d) both high calorific value and moderate ignition temperature

(d) both high calorific value and moderate ignition temperature

5 years ago
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Sources of Energy
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Answer to: Choose the correct statement (a) Sun can be taken as an inexhaustible source of energy (b) There is infinite storage of fossil fuel inside the earth (c) Hydro and wind energy plants are non-polluting (d) Waste from a nuclear power plant ca...

(c) Hydro and wind energy plants are non-polluting Explanation: In rainy season, wind velocity is higher. So the blades of windmill moves with gre...

5 years ago
Forum
Sources of Energy
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