Which of the following is a renewable energy source?
A Oil
B Natural gas
C Solar energy
D Diesel
Solar energy is a renewable resource as it is continuously replenished by sunlight, unlike finite resources like oil and natural gas.
What is the function of a wind turbine rotor?
A To convert mechanical energy into electrical energy
B To capture wind energy and rotate the blades
C To store energy in batteries
D To stabilize the turbine during storms
The rotor of a wind turbine captures the kinetic energy of wind and transfers it to the generator for conversion into electricity.
Which of the following systems is considered a distributed generation system?
A Large hydropower plants
B Rooftop solar panels
C Fossil fuel power plants
D Nuclear power plants
Distributed generation refers to small-scale energy production close to the point of use, such as rooftop solar systems.
What does an energy audit aim to achieve?
A To install new renewable energy systems
B To analyze and improve energy efficiency
C To calculate total carbon emissions
D To determine fossil fuel consumption rates
An energy audit identifies areas of energy wastage and provides recommendations to optimize energy usage and reduce costs.
Which renewable energy source depends on water flow?
A Wind energy
B Geothermal energy
C Hydropower
D Biomass energy
Hydropower systems utilize the flow of water in rivers or dams to rotate turbines and generate electricity.
What is a significant environmental benefit of using renewable energy?
A Lower installation costs
B No greenhouse gas emissions during operation
C Increased dependence on fossil fuels
D Higher energy production costs
Renewable energy systems, such as solar and wind, produce little to no greenhouse gases, helping mitigate climate change.
What does “net metering” allow users to do?
A Store energy for future use
B Sell excess renewable energy back to the grid
C Generate energy from fossil fuels
D Reduce grid energy efficiency
Net metering enables users to supply surplus electricity generated from renewable sources to the grid and receive credits.
Which renewable energy source uses anaerobic digestion to produce biogas?
A Solar energy
B Biomass energy
C Geothermal energy
D Wind energy
Biomass systems use anaerobic digestion to break down organic materials, producing biogas for electricity or heating.
Which system is ideal for generating electricity in remote areas without grid access?
A Off-grid solar systems
B Grid-connected wind farms
C Large hydropower plants
D Geothermal power plants
Off-grid solar systems are self-sufficient and provide electricity in remote locations without needing a central grid.
What is the purpose of a battery management system (BMS)?
A To generate electricity from renewable sources
B To optimize the performance and safety of batteries
C To increase battery size
D To convert AC to DC electricity
A BMS monitors battery voltage, temperature, and state of charge, ensuring safe and efficient energy storage.
Which renewable energy system captures thermal energy from the Earth’s interior?
A Solar energy
B Wind energy
C Geothermal energy
D Wave energy
Geothermal energy systems extract heat from beneath the Earth’s surface and use it for heating or power generation.
What does “energy efficiency” refer to?
A The total amount of energy produced
B The ratio of useful energy output to energy input
C The ability to store surplus energy
D The reduction in fossil fuel consumption
Energy efficiency measures how effectively energy is used, reducing waste and improving system performance.
What is the primary role of an inverter in a solar power system?
A To store energy
B To convert DC electricity into AC electricity
C To generate heat
D To regulate the flow of electricity
An inverter changes the direct current (DC) generated by solar panels into alternating current (AC) for household use.
Which energy source powers tidal energy systems?
A Wind currents
B Gravitational forces of the moon and sun
C Solar radiation
D Ocean thermal energy
Tidal energy systems harness the gravitational pull of the moon and sun to drive the movement of water and generate electricity.
What is the main component of a photovoltaic (PV) cell?
A Copper
B Silicon
C Aluminum
D Glass
Silicon is the primary material used in PV cells due to its excellent semiconducting properties for converting sunlight into electricity.
What does a smart grid integrate?
A Fossil fuel power plants
B Renewable energy sources with digital technology
C Manual grid monitoring systems
D Off-grid energy solutions
Smart grids use advanced digital systems to integrate renewable energy sources efficiently, balancing supply and demand.
What is the typical lifespan of modern solar panels?
A 5-10 years
B 10-15 years
C 25-30 years
D 50-60 years
Solar panels generally last 25-30 years, during which they maintain most of their efficiency before gradually degrading.
Which renewable energy source is suitable for flat, open landscapes?
A Hydropower
B Geothermal energy
C Wind energy
D Biomass energy
Wind energy systems perform well in open, flat areas where wind speeds are higher and more consistent.
What does “feed-in tariff” encourage?
A Fossil fuel usage
B Producing renewable energy by offering financial incentives
C Reducing energy efficiency
D Limiting renewable energy production
Feed-in tariffs reward renewable energy producers by guaranteeing payments for the electricity they generate and supply to the grid.
What is the purpose of energy storage in renewable systems?
A To reduce energy production
B To store surplus energy for later use
C To increase system inefficiency
D To generate energy from fossil fuels
Energy storage systems, such as batteries, store excess electricity generated during peak production for use during low-demand periods.