MCQ Questions for Class 10 Chapter 14 Science Sources of Energy with Answers

 

1. The working fluid in ocean thermal power plant is

A. Volatile liquid like ammonia
B. petrol
C. charcoal
D. liquified petroleum gas

ANSWER= A. Volatile liquid like ammonia Explanation: A. volatile liquid like ammonia

 

2. Geothermal energy is

A. Heat energy in the interior of earth
B. energy of molten mars exists in the farm of magma inside the earth.
C. molten lava on the surface of earth
D. energy obtained from solar thermal electric plants

ANSWER= C. molten lava on the surface of earth Explanation: C. The heat energy trapped in the certain region of earth’s crust is called geo thermal energy.

 

3. U-235 will undergo fission by

A. low energy neutrons only
B. high energy neutrons only
C. medium energy neutrons
D. low energy protons only

ANSWER= D. low energy protons only Explanation: D. Heavy nucleus such as uranuim-235, when bombarded with low energy neutrons split into lighter nuclear with the liberation of large amount of energy.

 

4. In a hydropower plant [NCERT Exemplar Problems]

A. Potential energy possessed by stored water is converted into electricity
B. Kinetic energy possessed by stored water is converted into potential energy
C. Electricity is extracted from water
D. Water is converted into steam to produce electricity.

ANSWER= A. Potential energy possessed by stored water is converted into electricity Explanation: A. The stored water behind the dam has a potential energy which charges into the kinetic energy of falling water. This kinetic energy is utilized to rotate the turbine to produce electricity.

 

5. Which is the ultimate source of energy? [NCERT Exemplar Problems]

A. Water
B. Sun
C. Uranium
D. Fossil fuels

ANSWER= B. Sun Explanation: B. Sun is the ultimate source of energy directly or indirectly, all the form of energy are desired from solar energy.

 

6. Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation? [NCERT Exemplar Problems]

A. Nuclear energy
B. Thermal energy
C. Solar energy
D. Geothermal energy

ANSWER= C. Solar energy Explanation: C. Solar energy leads to least environmental pollution in the process of its harnessing and utilisation.

 

7. Ocean thermal energy is due to [NCERT Exemplar Problems]

A. energy stored by waves in the ocean
B. temperature difference at different levels in the ocean
C. pressure difference at different levels in the ocean
D. tides arising out in the ocean

ANSWER= B. temperature difference at different levels in the ocean Explanation: B. Energy of warm surface water used to vaporise the low boiling point liquid ammonia. This vapours at high pressure is used to strin the turbines to generate electricity. Deep ocean cold water again condenses the used vapour into liquid.

 

8. The major problem in harnessing nuclear energy is how to [NCERT Exemplar Problems]

A. split nuclei?
B. sustain the reaction?
C. dispose off spent fuel safely?
D. convert nuclear energy into electrical energy?

ANSWER= C. dispose off spent fuel safely? Explanation: C. The waste product obtained from nuclear power plant is highly radioactive material and harmful for human beings and environment.

 

9. Which part of the solar cooker is responsible for green house effect? [NCERT Exemplar Problems]

A. Coating with black colour inside the box
B. Mirror
C. Glass sheet
D. Outer cover of the solar cooker

ANSWER= C. Glass sheet Explanation: C. Glass lid of solar cooker trapped the heat energy inside the box.

 

10. The power generated in a windmill [NCERT Exemplar Problems]

A. is more in rainy season since damp air would mean more air mass hitting the blades
B. depends on the height of the tower
C. depends on wind velocity
D. can be increased by planting tall trees close to the tower

ANSWER= A. is more in rainy season since damp air would mean more air mass hitting the blades Explanation: A. About 75% methane is present in bir-gas

 

11. Choose the correct statement [NCERT Exemplar Problems]

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 can be easily disposed off

ANSWER= C. Hydro and wind energy plants are non-polluting Explanation: C. In rainy season, wind velocity is higher. So the blades of windmill moves with greater speed.

 

12. 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

ANSWER= D. both high calorific value and moderate ignition temperature

 

13. The variety of coal which has the highest car-bon content

A. Anthracite
B. Peat
C. Bituminous
D. Lignite

ANSWER= A. Anthracite

 

14. Unit of calorific value of a substance is

A. Kcal
B. Joules
C. J kg
D. J/kg

ANSWER= D. J/kg

 

15. 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

ANSWER= D. presence of water and absence of air

 

16. Solar energy can be directly converted to elec-trical energy by which of the following de-vices?

A. solar cooker
B. solar heater
C. solar cell
D. solar geyser

ANSWER= C. solar cell

 

17. Energy can neither be created nor destroyed but still everybody discuss about the energy crisis because

A. Energy transform into different form continuously.
B. Usable form of energy is dissipated to the surroundings in less usable forms.
C. Energy is consumed and cannot be used again.
D. All of these

ANSWER= D. All of these Explanation: D. Energy can neither be created nor be destroyed but usable form is dissipated to surrounding in less usable farm which can’t be used again.

 

18. An ideal source of energy should have

A. higher calorific value
B. easy transportability
C. easy accessibility
D. All of these

ANSWER= D. All of these Explanation: D. These are the characterises of ideal source of energy.

 

19. Fossile fuels are

A. non-renewable source of energy
B. renewable source of energy
C. both A. and B.
D. Neither A. nor B.

ANSWER= A. non-renewable source of energy A. non-renewable source of energy Explanation: A. Fossile fuels were formed over million of years ago and there are only limited reserve. So they are non-renewable source of energy.

 

20. Dead organisms are transformed into petroleum and natural gas in

A. presence of air
B. absence of air
C. presence of sunlight
D. none of the above

ANSWER= B. absence of air

 

21. Which of the following problem is associated with a burning of coal?

(а) Carbon-dioxide emission
B. acid rain
C. ash with toxic metal supurity
D. all of these.

ANSWER= D. all of these.

 

22. Select the important factor for the site selection of a thermal power plant.

A. Distance from the populated area
B. Availability of fuel
C. Availability’ of water
D. Cost of plant

ANSWER= C. Availability’ of water Explanation: C. Water is required to produce steam. Thermal power plants are setup near the coal field and transmission of electricity is easy than transporting fuel.

 

Ques23. Wave energy is caused due to

A. strong winds blowing across the sea
B. kinetic energy possessed by huge waves near the sea shore
C. potential energy possessed by the stored water
D. both A. and B.

ANSWER= D. both A. and B. Explanation: D. The waves are generated by a strong wind due to solar energy across the sea.

 

24. Hydropower plant are located in the

A. desert area
B. plane area
C. hilly terrains
D. none-of above

ANSWER= C. hilly terrains Explanation: C. Hydroelectric power plant are generally located in high hilly areas where dam can easily be buit and large reservoir for storage of water can be obtained.

 

25. Biogas is a better fuel than animal dung cake because

A. biogas has lower calorific value.
B. animal dung cake has high calorific value
C. biogas bums smoke and leaves no residue
D. biogas is used as a fuel for cooking only wheareas dung cake can be used for cooking, illuminant the lanterns.

ANSWER= C. biogas bums smoke and leaves no residue Explanation: C. Biogas has high calorific value and leave no residue, no smoke after burning and can be used for domestic purpose, running engins and in gas lanterns for illumination.

 

26. Which of the following organism produces biogas from cow drug sherry in the biogas plant?

A. aerobic bectria
B. anaerobic bectria
C. prolozoa
D. fungi

ANSWER= B. anaerobic bectria Explanation: B. In the absence of oxygen, anaerobic micro-organism decomposed the compound of cow- dung sturry to generate biogas.

 

27. Wind is caused due to

A. uneven heating of earth’s surface
B. rotation of earth
C. local conditions
D. All of these

ANSWER= D. All of these Explanation: D. All are the factors that responsible for the blowing of wind.

 

28. What are the disadvantage of solar energy

A. A large surface area is required collect the solar
B. Daily average of solar energy varies from 4 to 7 kwh/m2
C. Highly hazardous toxic material is used in the manufacturing of solar device.
D. All of the above are disadvantages.

ANSWER= D. All of the above are disadvantages. Explanation: D. All the points given are the disadvantage age of using solar energy.

 

29. The temperature inside the solar cooker ranges from

A. 500-100°C
B. 100-140°C
C. 150-200°C
D. 70-80°C

ANSWER= B. 100-140°C Explanation: B. The box type solar cooker have a range 100-140°C.

 

30. The use of reflector in the solar cooker is to

A. Decrease efficiency
B. create green house effect
C. increase efficiency
D. none of these

ANSWER= C. increase efficiency Explanation: C. Reflectors (mirror) are used to focus the sun rays along with heat radiation inside the box to achieve high temperature.

 

31. Solar cells are made of

A. germanium
B. silicon
C. silver
D. aluminium

ANSWER= B. silicon Explanation: B. special grade silicon is used for making solar cells.

 

32. The material used for interconnection the solar cells in the solar panel is

A. silicon
B. silver
C. aluminium
D. copper

ANSWER= B. silver Explanation: B. Silver is the best conductor of electricity.

 

33. A solar panel is made by combining in an arrangement

A. solar concentrator
B. solar cookers
C. solar cells
D. solar chimney

ANSWER= C. solar cells Explanation: C. A large number of solar cells connected together in a particular arrangement to deliver useful electrical power is called solar cell panel.

 

34. Tidal energy is a farm of energy obtained from the

A. motion of surface water in ponds
B. ocean in the form of tidal waves
C. tides occurs in the river water
D. motion of the wave in sea

ANSWER= B. ocean in the form of tidal waves Explanation: B. The energy produced by the surge of ocean water during high and low tides due to difference in sea level is called tidal energy.

 

35. Tidal energy is harnessed by constructing a dam across

A. narrow opening to the sea
B. wide opening to the sea
C. the river in hilly trains
D. the river in plane areas

ANSWER= A. narrow opening to the sea Explanation: A. Tidal energy is harnessed by constructing a dam near the shores across narrow opening it.

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