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Science Olympiad Test: Sources of Energy-2 - Class 10 MCQ


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15 Questions MCQ Test Olympiad Preparation for Class 10 - Science Olympiad Test: Sources of Energy-2

Science Olympiad Test: Sources of Energy-2 for Class 10 2024 is part of Olympiad Preparation for Class 10 preparation. The Science Olympiad Test: Sources of Energy-2 questions and answers have been prepared according to the Class 10 exam syllabus.The Science Olympiad Test: Sources of Energy-2 MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Science Olympiad Test: Sources of Energy-2 below.
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Science Olympiad Test: Sources of Energy-2 - Question 1

 The electricity generated by a windmill depends on

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 1

We know that windmills are used to generate power from the winds. It converts wind energy to electrical energy. The power generated in a windmill depends on the velocity of the wind. If the velocity of the wind is higher, the windmill will generate more power. If the velocity of the wind is lower, the windmill will produce less power. In general, wind speed requires a minimum of 8 kph (2 m/s) to start rotating most small wind turbines. Hence, we can see that the power generated in a windmill depends on the velocity of the wind.

Science Olympiad Test: Sources of Energy-2 - Question 2

Wind power of a windmill is

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 2

Wind power, P = πr2 ρv3, where, v is the speed and pv is density of air.

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Science Olympiad Test: Sources of Energy-2 - Question 3

A solar photovoltaic cell is made of

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 3

Solar cell is made of silicon which is a good semiconductor.

Science Olympiad Test: Sources of Energy-2 - Question 4

Scientists consider ______ as the fuel of future

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 4

Suitable technologies are being developed to overcome difficulties in the way of using hydrogen as a fuel in near future.

Science Olympiad Test: Sources of Energy-2 - Question 5

Which one of these is secondary fuel

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 5

Coke LPG are secondary fuels whereas wood and petroleum are primary fuels.

Science Olympiad Test: Sources of Energy-2 - Question 6

Which one of these substances is obtained as one of the fractions during the fractional distillation of petroleum?

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 6

Petroleum on fractional distillation yields diesel, kerosene, petrol or gasoline, petroleum gas, asphalt, lubricating oil, paraffin wax.

Science Olympiad Test: Sources of Energy-2 - Question 7

Which is the largest component of biogas?

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 7
  • Biogas is formed by the decomposition of organic matter with the action of bacteria in the absence of oxygen.
  • The components in biogas is as follows: Methane 50-75%, Carbon dioxide 25-50%, Nitrogen 0-10%, Hydrogen 0-1%.

Hence, methane is the major component in biogas.

Science Olympiad Test: Sources of Energy-2 - Question 8

On which day the solar water heater cannot be used to get hot water?

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 8

Solar energy is the energy that we receive from the sun. Therefore, the heater will not get enough solar energy and the water will not heat. On a cloudy day, heat radiation coming from the sun do not reach the solar water heater. Hence, the solar water heater cannot be used to heat water on a cloudy day.

Science Olympiad Test: Sources of Energy-2 - Question 9

Which one of these is not renewable source of energy?

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 9
  • A renewable resource is a source of energy which can be used repeatedly and replaced naturally. Sun, tidal waves and wind are renewable resources for solar energy, tidal energy and wind energy respectively.
  • Non-renewable energy comes from sources that will run out or will not be replenished in our lifetime. Most non-renewable energy sources are fossil fuels: coal, petroleum, and natural gas.
Science Olympiad Test: Sources of Energy-2 - Question 10

Which one of the following is used as a fuel at nuclear power plant?

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 10

A nuclear fuel is the fuel that is used in a nuclear reactor to sustain a nuclear chain reaction. These fuels must be fissile and contain heavy radioactive nuclei such as uranium-235 and plutonium-239 to maintain a nuclear chain reaction.

Science Olympiad Test: Sources of Energy-2 - Question 11

Which one is the cleanest of all these fuels?

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 11

Natural gas gives off 50% of the CO2 released by coal and 25% less CO2 than oil for the same amount of energy produced.

Science Olympiad Test: Sources of Energy-2 - Question 12

Aviation fuels is a special grade

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 12

Kerosene has the highest calorific value of all and is thus used in a jet aeroplane as an aviation fuel.

Science Olympiad Test: Sources of Energy-2 - Question 13

A strong smelling which is added to LPG cylinders to help in the detection of gas leakage is

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 13

The heavier fraction of LPG is containing propane, butane, pentane etc. may be liquefied under pressure to produce liquefied petroleum gas.
So, LPG gas is basically propane and butane, and it is odorless in its natural state. The smell that you notice when there is a leak is actually the stench of an entirely different agent, called ethyl mercaptan (C2H6S)(C2H6S). This substance is added to the gas when it leaves the main storage terminals.
This substance is added in order to detect the leakage of LPG at the household level in order to save from fire accidents.
Hence, the strong-smelling substance added to LPG is ethyl mercaptan.

Science Olympiad Test: Sources of Energy-2 - Question 14

The process that forms the basis of hydrogen bomb is

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 14

The hydrogen bomb relies on fusion, the process of taking two separate atoms and putting them together to form a third atom.
Fusion is the process that powers the sun and the stars. It is the reaction in which two atoms of hydrogen combine together, or fuse, to form an atom of helium. In the process some of the mass of the hydrogen is converted into energy.

Science Olympiad Test: Sources of Energy-2 - Question 15

Hydrogen gas has high calorific value but it is not used as domestic fuel because

Detailed Solution for Science Olympiad Test: Sources of Energy-2 - Question 15

Hydrogen fuel is the most promising alternative fuel for the future. It has a high calorific value. and its only combustion product is water, so it is pollution free. It yields almost double the energy provided by jet fuels.
But it is not used as domestic fuel, due to several reasons:

  • Hydrogen is not easily available and cost of production is high Unlike other gases, hydrogen is not readily available in the atmosphere. It requires processes like electrolysis of water for its production. This is a very costly process and time-consuming
  • It is not easy to store: First of all, hydrogen is a gaseous fuel. Gases are less dense i.e. they occupy more volume. So, hydrogen requires a large fuel tank for storage.
  • Hydrogen is highly explosive: Using it as domestic fuel is very dangerous, because even a small spark can cause uncontrolled combustion leading to huge explosions.
  • It does not burn at a slow rate
  • Transport of hydrogen is very difficult.
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