Q9: What are the advantages of constructing dams for hydroelectric power station? Solar energy is energy derived from a Helium b Sun c Coal d Wave 7. Moreover, they are exhaustible in nature and are predicted to be finished off in the foreseeable future. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number. Thermal power plants: i Use coal, petroleum and natural gas to produce thermal electricity. Answer: Fossil fuels, which have been traditionally used by human beings as an energy sources, are non-renewable sources of energy. Methane is the major component of bio gas.
No negative marking for incorrect choice. It does not produce huge amount of smoke on burning. Hydro power plant: Refer to figure 14. T Text book o Advantages of Solar cookers: i Eco friendly ii Renewable iii Used in rural areas. Answer: Geothermal hot spots are scattered. Eventually small tears can begin accumulating in the surrounding tendons, which may cause inflammation and pain. Fossil fuels; like coal and petroleum are the main sources of energy for us.
T Text book o Advantages: i Eco friendly ii Renewable o Disadvantages: i Wind speed not uniform always. Which of the following is not the characteristics of a good fuel is: a Less calorific value b Easy to store and transport c Less residue after burning d All of the above 4. Answer: A good source of energy fulfils the following criteria: I It produces a lot of heat per unit mass. All the best — Happy Studying. Q10: Why do we prefer thermal power plants near coal or oil fields? Characteristics of a good fuel: iv High calorific value v Less smoke vi Less residue after burning vii Easy availability viii Inexpensive ix Easy to store and transport? Q6: Which of the following gases is a major constituent of biogas : Carbon monoxide, hydrogen, methane, carbon dioxide? These fossil fuels are non renewable sources of energy and cause environmental problems due to pollution. Hence, we should look for alternate sources of energy.
Answer: A good fuel produces a huge amount of heat on burning, does not produce a lot of smoke, and is easily available. Therefore, we have to conserve the energy sources. This can become significantly worse as the tendon repairs and scar tissue forms around the area creating a lack of blood flow. Answer: Natural gas can be used for heating and cooking food because it is a clean source of energy. Q3: State one limitation in harnessing geothermal energy.
Question 2: What is a good fuel? Q12: What kind of mirror concave, convex of plane should be best suited for use in a solar cooker? Renewable sources of energy; like solar energy, hydel energy, wind energy, etc. Geo-thermal energy-energy derived from: a Hot spots under the earth b Cold spots above the earth c Hot spots above the earth d Cold spots under the earth 9. So a panel of solar cells is used. Disadvantages of Hydro power plant i Highly expensive to construct. These sources of energy are limited and cannot replenish on their own. It reflects and concentrates solar energy from a large area to smaller one. Maximum temperature of 1000C only can be achieved in a solar cooker o Other solar devices- Solar water heater, Solar furnace 4 Geo thermal energy: i Energy harnessed from the heat of the sun is called Geo thermal energy.
Question 4: What are the disadvantages of fossil fuels? Over time, things like typing, reaching for something across your desk for a phone, or even regular bench pressing, or pushups can be deleterious to the health of your elbows. Disadvantages: Uniform tidal action is not seen B Wave energy: i Kinetic energy of the waves of sea are used to rotate turbines. Answer: The disadvantages of fossil fuels are as follows: a Burning of coal and petroleum produces a lot of pollutants causing air pollution. Answer: Due to geological changes molten rock forms in deeper hot region of the earth's crust are pushed upwards which gets collected at some depth below the earth surface. Ans: four important fiber crops of India are: Cotton, Jute, Hemp and Natural silk. Non conventional sources: 1 Bio mass: o It is the source of the conventionally used fuels that are used in our country.
Q11: What is the use of residual slurry in a biogas plant? Question 3: If you could use any source of energy for heating your food, which one would you use and why? Question 5: Why are we looking at alternate sources of energy? What are the four important fiber crops of India? Although it is highly inflammable, it is easy to use, transport, and it produces a huge amount of heat on burning. Q1: What are the important limitations of wind energy? Tidal energy is harnessed by constructing a dam across narrow opening to the sea. Which of the following is not the conventional sources of energy a Fossil fuels b Biomass c Solar energy d Vegetable wastes 6. Answer: Few suitable places for building tidal energy farms. The sea-level changes during the day. Describe any one of them.
T Text book 2 Wind energy: o It can be converted into mechanical and electrical energy. Healthy Elbow Elbow Pain Causes The most common cause of elbow pain I see on a daily basis is from overuse or repetitive motion from desk jobs. Q8: Why the Geothermal energy is classified as a renewable sources of energy? Answer: Transmission of electricity is more efficient than transporting coal or petroleum over a distance. Nuclear energy is also a better option but it carries the risk of leakage of radioactive radiations which has the potential to cause great and long-term damage. . Fission of radioactive substances is known as a Nuclear blast b Nuclear energy c Nucleolus energy d Source energy 8.
A typical solar cell using high quality silicon or silver develops a voltage of 0. Q2: What are hot spots? Thermal power plants uses …………. Answer: Methane around 75% Q7: Why are solar cookers covered with glass plate? We are not responsible for any type of mistake in data. Fossil fuels: were formed millions of years ago, when plants and animal remains got buried under the earth and were subjected to high temperature and pressure conditions. They are being consumed at a large rate. T Text book i It is the most conventional renewable energy source obtained from water falling from a great height.