Hydroelectric Power Plants

Q.

What is hydro energy? Explain the principle of generating electricity from hydro energy. How much hydro electric power is generated in India?

Q. What are the drawbacks of hydroelectric power plant?

1. It takes a lot of time to build dams.
2. Villages and towns submerge due to backwater storage.
3. Shortage of water down the river.
4. Waste is difficult to dispose.

Q. Match the following characteristics of hydroelectric power plant corresponding to their causes.

1. No harmful gases
2. Generate electricity as per demand
3. Tourist attraction
4. Generate electricity for many years

Q. The earth's gravitational force plays a key role in a ____ power plant.

1. geothermal
2. nuclear
3. thermal
4. hydroelectric

Q. Sort the process flow of electricity generation using a hydroelectric power plant in the correct order:

1. Water is let to flow down the dam
2. Electricity is produced
3. Construction of a dam
4. The turbines rotate due to the water
5. Storing sufficient water

1. $5-3-4-2-1$
2. $3-4-5-1-2$
3. $1-4-5-2-3$
4. $3-5-1-4-2$

Q. Which of the following is not among the advantages of hydropower generation?

1. It produces electricity with minimal pollution.
2. It does not reduce quality of water.
3. It causes rehabilitation of people.
4. It is renewable source of energy.

Q.

Which of these are the disadvantages of hydropower generation?

1. dams can be constructed only in limited areas

2. large areas of land get submerged within water when dams are erected

3. submerged vegetation rots under anaerobic conditions and produce methane, a green house gas

4. all of these

Q.

What energy conversion takes place in hydro power plants?

1. potential - kinetic- electrical

2. kinetic to potential to electric

3. potential to chemical to electric

4. all of these

Q.

In a hydroelectric power plant, more electrical power can be generated if water falls from a greater height because:

1. larger amount of potential energy is converted into kinetic energy

2. the electricity content of water increases with heigh

3. more water molecules dissociate into ions

4. its temperature increases

Q.

State two merits of hydroelectricity?

Q.

If a turbine is used in a fast flowing stream of river without any water storage facility. What energy conversion would take place for power generation?

1. heat energy to electrical energy

2. wind energy to electrical energy

3. potential energy to electrical energy

4. kinetic energy to electrical energy

Q. Which of the following are the disadvantages of hydel power generation?

1. Clean electricity with minimal pollution.
2. Comparatively less maintenance cost.
3. Rehabilitation of people.
4. Renewable source of energy.

Q. Which power plant works on the basis of gravity of earth?

1. Wind forms
2. Nuclear energy
3. Hydropower
4. Geothermal