Sources of energy Worksheet-2

Sources of energy Worksheet-2

 

  1. An example of renewable source of energy is :

A. Coal               B. Petroleum     C. Sun                 D. Natural gas

 

  1. What percentage of solar energy that strikes the periphery of the Earth is trapped by Earth?

A. 75%                B. 47%                C. 15%                D. 100%

 

  1. The fraction of sunlight which consists of infra­red radiation is :

A. 1/2                  B. 1/3                  C. 1/4                  D. 2/3

 

  1. The heat in the sunlight is due to :

A. ultra-violet radiation              B. infra-red radiation

C. visible radiation                       D. entire solar radiation

 

  1. Efficiency of modern solar cells is :

A. 100%             B. 90%               C. 60%               D. 25%.

 

  1. The production of solar cookers on a commercial scale in India began in :

A. 1950               B. 1970               C. 1962               D. 1980

 

  1. A good fuel is one which possesses :

A. high ignition temperature

B. high calorific value

C. moderate ignition temperature

D. high calorific value and moderate ignition temperature

 

  1. Which of the following variety of coal contains the highest percentage of carbon?

A. Lignite                                        B. Bituminous

C. Anthracite                                 D. Peat

 

  1. The main constituent of natural gas is :

A. butane           B. methane        C. hydrogen      D. oxygen

 

  1. LPG consists mainly of :

A. methane                                    B. ethane

C. butane                                        D. liquid hydrogen.

 

Answer Key:

  1. C
  2. B
  3. A
  4. B
  5. D
  6. C
  7. D
  8. C
  9. B
  10. C