Energy from Ocean: Tidal Power Quiz
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Questions and Answers

What type of energy is harnessed by tidal power plants?

  • Wind energy
  • Hydro energy (correct)
  • Solar energy
  • Geothermal energy
  • What is the primary focus of a single basin tidal power plant?

  • Harnessing the chemical energy of the ocean
  • Harnessing the energy generated by the rise and fall of ocean tides
  • Harnessing the kinetic energy of moving water currents (correct)
  • Harnessing the thermal energy of the ocean
  • What is the principle of operation of tidal stream generators?

  • Using tidal currents to rotate turbines (correct)
  • Using tidal currents to generate hydrogen
  • Using tidal currents to pump water
  • Using tidal currents to heat water
  • What is the advantage of tidal power generation compared to other forms of energy?

    <p>Less environmental impact</p> Signup and view all the answers

    How do tidal kite systems generate electricity?

    <p>By using tidal currents to move a kite in a figure-eight pattern</p> Signup and view all the answers

    What is the pattern of motion of the tidal kite in a tidal kite system?

    <p>Figure-eight pattern</p> Signup and view all the answers

    Where are tidal stream generators typically placed?

    <p>On the seabed in areas with strong tidal currents</p> Signup and view all the answers

    What is the purpose of the turbines in a tidal power plant?

    <p>To rotate and drive generators to produce electricity</p> Signup and view all the answers

    What is the characteristic of tidal currents that makes them useful for tidal power generation?

    <p>Predictable and consistent</p> Signup and view all the answers

    What type of energy is captured by tidal stream generators?

    <p>Kinetic energy</p> Signup and view all the answers

    What is a major advantage of two-basin tidal power plants?

    <p>High potential for energy generation due to the large tidal range</p> Signup and view all the answers

    What is the primary purpose of a tidal barrage in a tidal range power plant?

    <p>To control the flow of water between the sea and the estuary</p> Signup and view all the answers

    During which stage of the tidal cycle is the potential energy stored in the upper basin?

    <p>During high tide</p> Signup and view all the answers

    What determines the potential energy available for electricity generation in a tidal range power plant?

    <p>The tidal range</p> Signup and view all the answers

    What is the main advantage of a two-basin tidal power plant over a tidal range power plant?

    <p>It offers more flexibility in controlling water flow between basins</p> Signup and view all the answers

    What is the purpose of the sluice gates in a tidal range power plant?

    <p>To control the flow of water between the sea and the estuary</p> Signup and view all the answers

    What happens during the low tide stage of the tidal cycle in a tidal range power plant?

    <p>The water flows from the upper basin to the lower basin</p> Signup and view all the answers

    How often does the tidal cycle typically occur?

    <p>Twice a day</p> Signup and view all the answers

    What is the main advantage of tidal power plants in terms of energy generation?

    <p>They have a predictable energy output</p> Signup and view all the answers

    What is the purpose of the turbines in a tidal range power plant?

    <p>To generate electricity</p> Signup and view all the answers

    What is the main factor that affects the amount of water that can be stored and released in tidal power plants?

    <p>Basin size</p> Signup and view all the answers

    What is the primary advantage of tidal power plants?

    <p>Predictable and reliable electricity</p> Signup and view all the answers

    What is the principle of operation of OTEC systems?

    <p>Utilizing the temperature difference between the ocean's surface and deeper layers</p> Signup and view all the answers

    What is the primary function of the heat exchanger in an OTEC system?

    <p>To vaporize the working fluid</p> Signup and view all the answers

    What is the main difference between closed-cycle and open-cycle OTEC systems?

    <p>The type of working fluid used</p> Signup and view all the answers

    What is the primary advantage of OTEC systems over other forms of energy generation?

    <p>Low environmental impact</p> Signup and view all the answers

    What is the main challenge in the commercial deployment of OTEC systems?

    <p>All of the above</p> Signup and view all the answers

    What is the purpose of the cold seawater in an OTEC system?

    <p>To condense the vaporized fluid</p> Signup and view all the answers

    What is the primary benefit of OTEC systems in terms of power generation?

    <p>Continuous power generation</p> Signup and view all the answers

    What is the main advantage of hybrid OTEC systems?

    <p>Improved efficiency</p> Signup and view all the answers

    Which phase involves warm surface seawater vaporizing a low-boiling-point fluid in the Open Cycle OTEC system?

    <p>Vaporization</p> Signup and view all the answers

    In the Closed Cycle OTEC system, which component is responsible for condensing the working fluid back into a liquid?

    <p>Condenser</p> Signup and view all the answers

    What is a key difference between the Open and Closed Cycle OTEC systems?

    <p>The use of a separate working fluid</p> Signup and view all the answers

    What is the purpose of the Turbine in both Open and Closed Cycle OTEC systems?

    <p>To drive a generator and produce electricity</p> Signup and view all the answers

    Which OTEC system has a design that is simpler but is limited by the availability of warm seawater?

    <p>Open Cycle OTEC</p> Signup and view all the answers

    In the Closed Cycle OTEC system, what is the role of the warm seawater?

    <p>To drive a turbine</p> Signup and view all the answers

    What happens to the working fluid in the Open Cycle OTEC system after it drives the turbine?

    <p>It is discharged back into the ocean</p> Signup and view all the answers

    Which component helps in maintaining a continuous closed loop in the Closed Cycle OTEC system?

    <p>Condenser</p> Signup and view all the answers

    Where does the cold seawater from the deep layers flow in the Open Cycle OTEC system?

    <p>Condenser</p> Signup and view all the answers

    What is the primary function of the low-boiling-point fluid in OTEC systems?

    <p>To absorb heat and vaporize</p> Signup and view all the answers

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