Hydroelectric Power Station

Q.

A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (g = 10 ms^–2)

1. 5000 kg

2. 6500 kg

3. 5240 kg

4. 5012 kg

Q.

Fuel used in thermal power plants is

1. water

2. uranium

3. biomass

4. fossil fuels

Q.

What is the function of

(a). armature.

(b). slip rings.

(c). brushes in ac generator.

Q.

Hydroelectric power plants are generally located in:

1. Hilly areas

2. Flat areas

3. Deltas

4. Deserts

Q.

The cost of fuel transportation is minimum in:

1. Thermal power plant

2. Nuclear power plant

3. Hydro-electric power plant

4. None of the above

Q.

Both power and manure is provided by

1. Nuclear plants

2. Thermal plants

3. Biogas plants

4. Hydroelectric plant

Q.

Which of the following power plant has the longest physical life?

1. Hydro electric plant

2. Thermal power plant

3. Nuclear power plant

4. None of the above

Q.

The power of a d.c. motor can be increased:

1. By increasing number of turns in its coil

2. By laminating its soft iron core

3. By increasing the strength of current flowing through it

4. All of these

Q.

Which of the following statement is true regarding hydropower plants?

1. Electricity is extracted from the water.

2. The potential energy possessed by the stored water is converted into electricity.

3. Water is converted into steam to produce electricity.

4. Kinetic energy possessed by the stored water is converted into potential energy.

Q.

Which of the following represents the correct order of energy change in Hydroelectric power stations?

1. Heat energy→Chemical energy→Mechanical energy→Electrical energy

2. Potential energy→Kinetic energy→Mechanical energy→Electrical energy

3. Potential energy→Mechanical energy→Kinetic energy→Electrical energy

4. Heat energy→Kinetic energy→Mechanical energy→Electrical energy

Q.

In India, Hydroelectric power contributes approximately ______ percent of the total electricity produced. a) 44% b) 22% c) 55% d) 3%

Q. Name the device used to increase the voltage at generating station.

Q.

In a waterwheel which form of energy is transformed into work ?

Q.

At a particular power station, the following energy change takes place:
Potential energy -> Kinetic energy -> Mechanical energy -> Electrical energy
What type of power station it is?

1. Thermal power station

2. Nuclear power station

3. Hydroelectric power station

4. Wind power station

Q.

Which of the following resources are exhaustible?

1. fossil fuels

2. wind energy

3. nuclear energy

4. hydro energy

Q.

How can the speed of rotation of the coil in an electric motor can be increased?

Q. Distinguish between :
Thermal energy and Hydro electricity.

Q. Which of the following resources are inexhaustible?

1. Fossil fuels
2. Wind energy
3. Hydro energy
4. Nuclear energy

Q. Which industry provides jobs to the maximum number of people?

1. Iron industry
2. Textile industry
3. Sugar industry
4. Tea processing industry

Q.

If one builds a turbine in a fast flowing stream of river without building dam. What energy conversion will happen for power generation?

1. potential energy to electrical energy

2. heat energy to electrical energy

3. kinetic energy to electrical energy

4. wind energy to electrical energy

Q.

Which power plant use coal to generate electricity?

1. Nuclear Power Plant

2. Thermal Power Plant

3. Hydro Power plant

4. Biogas Power Plant

Q. Which is the largest hydroelectric power project of India?

1. Sardar Sarovar
2. Koyna
3. Nathpa Jhakri
4. Bhakra Nangal
   

Q. Which is the highest hydroelectric dam in India?

1. Koyana Dam
2. Sardar Sarovar Dam
3. Tehri Dam
4. Bhakra- Nangal Dam

Q. We use floating generators in the sea to harness ____.

1. wind energy
2. wave energy
3. tidal energy
4. hydel energy

Q. We use floating generators in the sea to harness ____.

1. wind energy
2. wave energy
3. tidal energy
4. hydel energy

Q.

Question 12
Choose the correct statement.

(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 sources of energy
(d) Waste from a nuclear power plant can be easily disposed off

Q. To convert AC generator to DC generator, ring type commutator must be used.

1. split
2. slip
3. rectangular

Q. Which is the world's leading producer of hydroelectric power?

1. Canada
2. China
3. Russia
4. India

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. What kind of energy conversion takes place in hydropower plants?

1. Kinetic - Potential - Electrical
2. Chemical - Potential - Kinetic
3. Potential - Kinetic - Electrical
4. Kinetic - Chemical - Electrical