- 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/Explanation
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.
- An ideal source of energy should have
(a) higher calorific value
(b) easy transportability
(c) easy accessibility
(d) All of these
Answer/Explanation
Answer: d
Explanation:
(d) These are the characterises of ideal source of energy.
- 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/Explanation
Answer: a
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.
- 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/Explanation
Answer: b
Explanation:
(b) absence of air
- 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/Explanation
Answer: d
Explanation:
(d) all of these.
- 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/Explanation
Answer: c
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.
7.The material used for interconnection the solar cells in the solar panel is
(a) silicon
(b) silver
(c) aluminium
(d) copper
Answer/Explanation
Answer: b
Explanation:
(b) Silver is the best conductor of electricity.
8. Hydropower plant are located in the
(a) desert area
(b) plane area
(c) hilly terrains
(d) none-of above
Answer/Explanation
Answer: c
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.
- 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/Explanation
Answer: c
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.
- 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/Explanation
Answer: b
Explanation:
(b) In the absence of oxygen, anaerobic micro-organism decomposed the compound of cow- dung sturry to generate biogas.
- Wind is caused due to
(a) uneven heating of earth’s surface
(b) rotation of earth
(c) local conditions
(d) All of these
Answer/Explanation
Answer: d
Explanation:
(d) All are the factors that responsible for the blowing of wind.
- 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/Explanation
Answer: d
Explanation:
(d) All the points given are the disadvantage age of using solar energy.
- 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/Explanation
Sources of Energy Questions and Answer: bExplanation:
(b) The box type solar cooker have a range 100-140°C.
- 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/Explanation
Answer: c
Explanation:
(c) Reflectors (mirror) are used to focus the sun rays along with heat radiation inside the box to achieve high temperature.
- Solar cells are made of
(a) germanium
(b) silicon
(c) silver
(d) aluminium
Answer/Explanation
Answer: b
Explanation:
(b) special grade silicon is used for making solar cells.
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