1. The power generated in a windmill ?

can be increased by planting tall trees close to the tower

depends on wind velocity

is more in rainy season since damp air would mean more air mass hitting the blades

depends on the height of the tower

Answer: is more in rainy season since damp air would mean more air mass hitting the blades

Explanation:

About 75% methane is present in beer gas


2. Ocean thermal energy is due to ?

tides arising out in the ocean

pressure difference at different levels in the ocean

temperature difference at different levels in the ocean

energy stored by waves in the ocean

Answer: temperature difference at different levels in the ocean

Explanation:

Energy of warm surface water used to vaporise the low boiling point liquid ammonia. This vapours at high pressure is used to strin the turbines to generate electricity. Deep ocean cold water again condenses the used vapour into liquid.


3. Geothermal energy is ?

energy obtained from solar thermal electric plants

molten lava on the surface of earth

energy of molten mars exists in the farm of magma inside the earth.

Heat energy in the interior of earth

Answer: molten lava on the surface of earth

Explanation:

The heat energy trapped in the certain region of earth’s crust is called geo thermal energy.


4. A solar panel is made by combining in an arrangement ?

solar chimney

solar cells

solar concentrator

solar cookers

Answer: solar concentrator

Explanation:

A large number of solar cells connected together in a particular arrangement to deliver useful electrical power is called solar cell panel.


5. Which of the following organism produces biogas from cow drug sherry in the biogas plant ?

fungi

prolozoa

aerobic bacteria

anaerobic bacteria

Answer: anaerobic bacteria

Explanation:

In the absence of oxygen, anaerobic micro-organism decomposed the compound of cow dung sturry to generate biogas.


6. Fossile fuels are ?

renewable source of energy

Neither (a) nor (c)

non-renewable source of energy

both (a) and (c)

Answer: non-renewable source of energy

Explanation:

Fossile fuels were formed over million of years ago and there are only limited reserve. So they are non-renewable source of energy.


7. Ocean thermal energy is produced due to ?

tides rising out of the ocean.

energy stored by waves in the ocean.

pressure difference at different levels in the ocean.

temperature difference at different levels in the ocean.

Answer: temperature difference at different levels in the ocean.

Explanation:


8. The variety of coal which has the highest carbon content ?

Lignite

Bituminous

Peat

Anthracite

Answer:

Explanation:


9. The major problem in harnessing nuclear energy is how to ?

convert nuclear energy into electrical energy

dispose off spent fuel safely

sustain the reaction

split nuclei

Answer: dispose off spent fuel safely

Explanation:


10. One major problem in harnessing nuclear energy is ?

disposing off spent fuel easily.

splitting the nuclei.

sustaining the reaction.

converting nuclear energy into electrical energy.

Answer: disposing off spent fuel easily.

Explanation: