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Sources of Energy Test - 17

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Sources of Energy Test - 17
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which one of the following is not a characteristic of a good fuel?
    Solution
    Characteristics of a good fuel are as follows:
    1. Cheap and easily available.
    2. Easy to store and transport.
    3. Low ash content.
    4. Should not produce any harmful substances.
    5. High calorific value.
    6. Moderate ignition temperature. 
  • Question 2
    1 / -0
    All are solid fuels except:
    Solution
    Solid fuels include peat, coal, coke, wood, biomass. Liquid fuels include petroleum, alcohol. Gaseous fuel includes natural gas.
  • Question 3
    1 / -0
    Gas obtained from animal dung and human excreta is called:
    Solution
    Biogas is produced from decomposition of any biodegradable waste such as sewage, kitchen wastes, animal wastes, etc.
  • Question 4
    1 / -0
    The minimum speed of wind necessary for the satisfactory working of a wind generator to produce electricity is about:
    Solution
    Speed of the wind is an important element in rotating the turbines in the wind mills for the generation of electricity. Wind mills cannot be set up everywhere, it can be only set up in highly windy areas or with the minimum wind speed of 15 km/hr.
  • Question 5
    1 / -0
    The disposal of waste produced in a nuclear power plant is difficult because they are:
    Solution
    Waste formed as a byproduct of nuclear reactions is a nuclear waste. Nuclear wastes are highly radioactive in nature.
  • Question 6
    1 / -0
    The energy generated and stored inside the Earth’s crust is __________.
    Solution
    The energy generated and stored inside the Earth’s crust is known as geothermal energy.
    Due to geological changes, molten rocks formed in the deeper hot regions of the earth’s crust are pushed upward and trapped in certain regions called hot spots. When underground water comes in contact with the hot spot, steam is generated. Sometimes hot water from that region finds outlets at the surface. Such outlets are known as hot springs. The steam trapped in rocks is routed through a pipe to a turbine and used to generate electricity.
  • Question 7
    1 / -0
    The energy possessed by the fast moving air or storm is called:
    Solution
    The energy possessed by the fast moving air or storm is called the wind energy. This energy is used in driving a wind mill.
  • Question 8
    1 / -0
    What is a group of solar cells called?
    Solution
    Group of solar cells is called solar panel, all the cells in the panel are connected in a series combination. that produces high potential difference across the terminal. 
    Hence Option is D.
  • Question 9
    1 / -0
    Mixing up of air with materials, injurious to health, is termed as:
    Solution
    Air pollution is the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials. For example- Car emissions, chemicals from factories causes air pollution.
  • Question 10
    1 / -0
    Which of the following devices does not make use of solar energy directly?
    Solution
    Other than dry cells, i.e., the battery cells, all three devices have been invented to generate, store or directly utilize solar energy. whereas, Dry cells generate energy from a chemical reaction. 
    Hence, Option D
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