Tag: sources of water

Questions Related to sources of water

Per capita daily consumption of energy is lowest in

evs sources of water conservation of natural and energy resources energy conservation and sources reduce, recycle, reuse importance of the conservation of natural resources

  1. USA

  2. UK

  3. India

  4. Russia

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Correct Option: C

To meet energy crisis what other sources can be exploited?

evs sources of water conservation of natural and energy resources energy conservation and sources reduce, recycle, reuse importance of the conservation of natural resources

  1. Wind

  2. Water

  3. Nuclear

  4. All of the above

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Correct Option: D
Explanation:

The wind, water, and nuclear energy are renewable forms of energy resources. These reserves once consumed can be replenished again. When there is an energy crisis, due to the reduction in the number of energy reserves, there will be an increase in the use of renewable resources. These energy resources can be exploited for the production of energy when there are no other resources available. 

Thus, the correct answer is option D. 

Greatest problem in the water conservation is to reduce the amount of

evs sources of water conservation of natural and energy resources energy conservation and sources reduce, recycle, reuse importance of the conservation of natural resources

  1. Ground water

  2. Precipitation

  3. Evaporation

  4. Run off water

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Correct Option: C
Explanation:

Evaporation from water reservoirs in hot arid climates causes a loss of 10 vertical feet a year. This water loss can be controlled by construction of reservoirs with greater water depth and concentration of water into single reservoir. Also wind blowing across the surface of water reservoir causes additional evaporation. A windbreak helps to conserve water. Thus the correct answer is option C.

The best way to conserve energy is 

evs sources of water conservation of natural and energy resources energy conservation and sources importance of the conservation of natural resources

  1. Install exhaust fan at a high elevation

  2. Use of fluorescent bulbs

  3. Turn off light when not in use

  4. All of the above

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Correct Option: D
Explanation:

Conservation of energy is of great concern nowadays. Light is also a form of energy which should not be wasted. The best way to conserve the light energy are as follows.

(i) Turn off the lights when not in use.
(ii) De-dust lighting fixtures to maintain illumination.
(iii) LED Lamps should be used instead of conventional incandescent bulbs. For example, a 16w LED bulb can be as bright as 150w halogen lamp. LED lamp consumes 1/3rd of CFL energy and 1/30th energy of incandescent bulbs. 
(iv) Conventional regulators should be replaced with electronic regulators for ceiling fans.
(v) Install exhaust fans at a higher elevation than ceiling fans. In diary/poultry industry usage of multi fan axial fans leads to low energy consumption with low noise levels etc.
Thus, the correct option is D.

Identify the energy saving light bulb.

evs sources of water conservation of natural and energy resources energy conservation and sources importance of the conservation of natural resources

  1. Incandescent bulb

  2. Compact fluorescent light bulb

  3. Light emitting diode bulb

  4. Both B and C

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Correct Option: D
Explanation:

CFL (Compact fluorescent light bulbs) and LED (Light emitting diode bulb) are used in place of incandescent bulb because they use about 1/7$^{th}$ of the power used by the incandescent bulb. Hence, they are highly efficient in saving electricity.

Thus, the correct answer is option D.

Solar energy is the .......... source of energy.

evs sources of water conservation of natural and energy resources energy conservation and sources importance of the conservation of natural resources

  1. Conventional

  2. Non conventional

  3. Man made

  4. None of the above

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Correct Option: B
Explanation:

Energy generated by using wind, tides, solar, geothermal heat, and biomass is known as non-conventional energy. Solar energy is an inexhaustible non-conventional resource. There are three methods of harnessing solar energy- direct heating (e.g., solar cookers), thermoelectric conversion or solar thermal power plants, for example, steam generation and photovoltaic conversion.

Thus, the correct answer is option B.

Switch on the power when TV is not in use leads to the energy loss of

evs sources of water conservation of natural and energy resources energy conservation and sources importance of the conservation of natural resources

  1. 5 watts

  2. 10 watts

  3. 1 watts

  4. 50 watts

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Correct Option: B
Explanation:

The energy management is very important for the conservation of energy. It involves monitoring the consumption of energy, finding ways to save (control) energy and taking initiatives to conserve energy by replacing the inefficient equipments and controlling routine waste. The power should not be switched on when TV and any other audio or video device is not in use for a long time. It is because even in the switch off condition energy is consumed by the electric appliances and this is called standby power. 10 watts of energy is consumed by the TV even if, the power is on but TV is not in use. So, the correct option is B.

Kulh is 

evs sources of water water resources and conservation receding water table water conservation and irrigation

  1. Dam

  2. Irrigation canal

  3. Crop field

  4. None of the above

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Correct Option: B

Kulh carries water from .......... to village.

evs sources of water water resources and conservation receding water table water conservation and irrigation

  1. Glaciers

  2. River

  3. Sea

  4. Water tank

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Correct Option: A

What is the percentage of earth surface which is covered by oceans and seas?

evs sources of water water resources and conservation receding water table water conservation and irrigation

  1. 50%

  2. 75%

  3. 88%

  4. 97%

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Correct Option: D
Explanation:

97% of earth surface is covered by ocean and seas.