(A).ELECTRICAL SYSTEMS: Energy efficient motors, energy efficient lighting and control, selection of luminaires, variable voltage variable frequency drives (adjustable speed drives), controls for HVAC (heating, ventilation and air conditioning), demand site management.(B).MECHANICAL SYSTEMS: Fuel cells- principle, thermodynamic aspects, selection of fuels & working of various types of fuel cells, Environmental friendly and Energy efficient compressors and pumps - take the quiz

What is the most energy-efficient type of motor?

Induction motor

Synchronous motor

Brushless DC motor

Stepper motor

Which of the following lighting technologies is the most energy-efficient?

Incandescent bulbs

Halogen bulbs

Compact fluorescent lamps (CFL)

High-intensity discharge (HID) lamps

What is the purpose of luminaires in lighting systems?

What is the main advantage of variable voltage variable frequency drives (VFDs)?

Increased motor efficiency

Reduced energy consumption

Improved motor speed control

Enhanced motor protection

Which of the following controls is commonly used for HVAC systems?

Thermostats

Humidistats

Pressure switches

Occupancy sensors

Which of the following is a principle behind fuel cells?

Electrolysis

Combustion

Oxidation-reduction reactions

Nuclear fission

What type of fuel is commonly used in fuel cells?

Hydrogen

Methane

Ethanol

Propane

How do environmentally friendly compressors contribute to energy efficiency?

By reducing noise pollution

By minimizing refrigerant leaks

By improving system performance

By reducing maintenance requirements

What is the purpose of pumps in mechanical systems?

Which of the following is an example of an energy-efficient compressor?

Reciprocating compressor

Centrifugal compressor

Scroll compressor

Diaphragm compressor

How does a fuel cell differ from a traditional combustion engine?

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

Direct methanol oxidation

Solid oxide electrolyte

Proton exchange through a polymer membrane

Molten carbonate electrolyte

Which type of fuel cell operates at the highest temperature?

Polymer electrolyte membrane (PEM) fuel cell

Solid oxide fuel cell (SOFC)

Alkaline fuel cell

Phosphoric acid fuel cell

What is the primary advantage of using fuel cells over traditional power generation methods?

Lower capital cost

Higher energy density

Reduced greenhouse gas emissions

Simpler maintenance requirements

Which of the following is an example of an environmentally friendly pump?

Centrifugal pump

Diaphragm pump

Magnetic drive pump

Reciprocating pump

What is the role of a compressor in a refrigeration system?

How does variable-speed control contribute to energy efficiency in HVAC systems?

By reducing noise levels

By improving indoor air quality

By optimizing fan and motor operation

By increasing system capacity

Which of the following is a common control strategy for demand site management?

Load shedding

Peak shaving

Demand response

Voltage regulation

What is the purpose of an air handling unit (AHU) in HVAC systems?

What is the primary function of a fuel cell stack?

To store hydrogen fuel

To convert fuel into electricity

To regulate fuel flow

To produce heat as a byproduct

How does a scroll compressor differ from a reciprocating compressor?

What is the role of a condenser in a refrigeration system?

Which of the following is a benefit of using variable-speed pumps in mechanical systems?

Reduced maintenance requirements

Enhanced system reliability

Energy savings through optimized flow control

Increased pump lifespan

How does a centrifugal compressor differ from a positive displacement compressor?

What is the primary advantage of using fuel cells for portable power applications?

Longer runtime per charge

Faster charging times

Zero emissions

Lower cost per unit of energy

Which of the following is an example of an energy-efficient lighting control system?

Occupancy sensors

Daylight harvesting systems

Dimmer switches

Photocells

What is the purpose of an expansion valve in a refrigeration system?

How does a fuel cell contribute to energy efficiency compared to traditional power plants?

By utilizing waste heat for cogeneration

By achieving higher electrical conversion efficiencies

By reducing transmission losses

By minimizing environmental impact

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