Sources of energy

Which of the following is a non-renewable source of energy?

• Wood

• sun

• fossil fuels

• wind

Which environmental hazard is not controlled by the combustion of fossil fuels?

• Acid rain

• Green house effect

• Destruction of wild life habitat

• Air pollution

Choose the incorrect statement regarding wind power

• its temperature increases

• larger amount of potential energy is converted into kinetic energy

• the electricity content of water increases with height

• more water molecules dissociates into ions.

Which of the following is employed for harnessing the potential energy of surface water stored in a reservoir?

• Thermal power plant

• Nuclear power plant

• Tidal power plant

• Hydroelectric power plant

Solar energy the universal source of energy. It is converted into chemical energy by

• photovoltaic cells

• solar cooker

• solar concentrators

• green plants

While filling LPG in cylinders, a substance X is added to make the detection of leakage of LPG from the cylinder easy. The substance X is

• ethanol

• ethanethiol ( ethyl mercaptain)

• methanethiol

• methanol

What sector of the Indian economy consumes most of nation's petroleum?

• residential

• commercial

• industrial

• transportation

Global warming focuses on an increase in the level of which gas in the atmosphere?

• ozone

• sulfur dioxide

• carbon dioxide

• nitrous oxide

Choose the incorrect statement regarding wind power

• It is expected to harness wind power to minimum in open space

• The potential energy content of wind blowing at high attitudes is the source of wind power

• Wind hitting at the blades of a windmill causes them to rotate. The rotation thus achieved can be utilized further.

• One possible method of utilizing the energy of rotational motion of the blades of a windmill is to run the turbine of an electric generator

Ocean thermal energy is due to

• energy stored by waves in the ocean

• temperature difference at different levels in the ocean.

• pressure difference at different levels in the ocean

• tides arising out in the ocean.