Unit-V_K Section

Which of the following sources of energy is NOT (ultimately) solar based?

• Wind

• Biomass

• Tides

• Coal

• Hydroelectricity

Which combination of renewable energy sources would be most effective for a coastal city prone to high winds and significant tidal activity?

• Geothermal and solar

• Wind and tidal

• Biomass and hydroelectric

• Solar and geothermal

Fuel cells generate electricity using which process?

• Combustion of hydrogen

• Electrochemical reaction between hydrogen and oxygen

• Conversion of mechanical energy to electrical energy

• Thermal expansion of gases

When the Earth's temperature gradient is utilized to produce electricity, it is known as _______________________ energy.

The efficiency of a solar thermal plant is significantly affected by ___________________, which reduces the amount of heat transferred to the working fluid.

• Reflection losses

• Heat losses

• Optical losses

• Mechanical losses

Which process is primarily used in biomass energy systems to produce biogas?

• Combustion

• Fermentation

• Anaerobic digestion

• Gasification

Second-generation biofuels are derived from which type of biomass feedstock?

• Edible crops

• Non-edible plant material such as lignocellulose

• Microalgae

• Genetically modified crops

In a fuel cell, the process occurring at the anode is called _________________

The environmental impact of large hydroelectric dams is primarily due to ________.

• Air pollution

• Methane emissions from reservoirs

• Noise pollution

• Excessive use of fossil fuels

Which material is commonly used in the manufacturing of solar photovoltaic cells?

• Aluminum

• Copper

• Silicon

• Zinc