What is the principle behind fuel cells?

Electrochemical reaction

Combustion

Nuclear fission

Mechanical rotation

How do fuel cells contribute to environmental friendliness?

What is the working principle of a proton exchange membrane (PEM) fuel cell?

Protons pass through a membrane while electrons flow through an external circuit

Hydrogen and oxygen mix in a combustion chamber

Heat is generated by nuclear fission

Mechanical rotation of a turbine

Which type of fuel cell operates at high temperatures (700-1000°C) and uses a ceramic electrolyte?

Solid Oxide Fuel Cell (SOFC)

Proton Exchange Membrane (PEM) Fuel Cell

Direct Methanol Fuel Cell (DMFC)

Alkaline Fuel Cell (AFC)

What is the main advantage of using fuel cells for power generation compared to traditional combustion engines?

Which type of compressor is commonly used in energy-efficient applications due to its low maintenance requirements and high reliability?

Scroll compressor

Centrifugal compressor

Reciprocating compressor

Rotary vane compressor

How do compressors contribute to energy efficiency in mechanical systems?

Which type of pump is commonly used for high-pressure applications, such as water supply in tall buildings?

Centrifugal pump

Reciprocating pump

Diaphragm pump

Gear pump

What is the main advantage of using variable speed pumps in mechanical systems?

What is the role of fuel cells in achieving energy efficiency in mechanical systems?

Converting chemical energy into electrical energy

Utilizing waste heat for cogeneration

Reducing greenhouse gas emissions

Increasing friction losses

Generating mechanical rotation

Which type of fuel cell operates at low temperatures (80-100°C) and uses a polymer electrolyte membrane?

Proton Exchange Membrane (PEM) Fuel Cell

Solid Oxide Fuel Cell (SOFC)

Direct Methanol Fuel Cell (DMFC)

Alkaline Fuel Cell (AFC)

What is the main disadvantage of using fuel cells for power generation compared to traditional combustion engines?

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