Electricity and Hydricity

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Questions and Answers

What percentage of fuel energy is converted into motion in even the most efficient automobiles?

  • 40 to 45 percent
  • 30 to 35 percent (correct)
  • 60 to 65 percent
  • 50 to 55 percent

What is the estimated fuel efficiency of fuel-cell hybrids?

  • 60 to 65 percent (correct)
  • 70 to 75 percent
  • 40 to 45 percent
  • 50 to 55 percent

What would be a major benefit of a low-loss grid?

  • Reduced energy production
  • Increased energy storage
  • Increased energy transmission losses
  • Reduced need for new generation construction (correct)

What would be required to replace a modest percentage of petroleum-based transportation fuels with hydrogen?

<p>A large amount of electricity and hydrogen (C)</p> Signup and view all the answers

What would a SuperGrid enable power plants to do?

<p>Tap into excess nighttime capacity to meet peak electricity needs (B)</p> Signup and view all the answers

What is a potential benefit of combining hydrogen fuel cells with the SuperGrid?

<p>Increased tolerance for rapid swings in demand (A)</p> Signup and view all the answers

What feature of the SuperGrid would allow it to reduce fuel costs for electric- and hydrogen-powered hybrid vehicles?

<p>Its ability to store electricity in chemical form (D)</p> Signup and view all the answers

What is the equivalent amount of energy stored in every 70 kilometers of SuperCable?

<p>32 gigawatt-hours of electricity (B)</p> Signup and view all the answers

What type of vehicles have been demonstrated by BMW, Mazda, and others?

<p>Hybrid vehicles that have two fuel tanks and engines that burn hydrogen and gasoline (D)</p> Signup and view all the answers

What is the purpose of the Raccoon Mountain reservoir in Tennessee?

<p>To generate electricity through hydroelectric dam (A)</p> Signup and view all the answers

What is the primary benefit of using the SuperGrid as an energy store?

<p>Reducing fuel costs for electric- and hydrogen-powered hybrid vehicles (A)</p> Signup and view all the answers

What is the function of the pipes in the SuperCable?

<p>To store hydrogen fuel for hybrid vehicles (C)</p> Signup and view all the answers

What is the primary advantage of using cryogenic, superconducting conduits in the proposed SuperGrid?

<p>Reduced energy losses due to heat generation (C)</p> Signup and view all the answers

What is the primary motivation for developing the Continental SuperGrid?

<p>To address the intermittency of renewable energy sources (B)</p> Signup and view all the answers

What is the expected role of the SuperGrid in the context of energy storage?

<p>To act as a vast repository of energy through hydrogen storage (B)</p> Signup and view all the answers

What is the primary advantage of using hydrogen as a fuel in the context of the SuperGrid?

<p>It can be used for both energy storage and personal transportation (A)</p> Signup and view all the answers

What is the expected timeframe for the development and implementation of the SuperGrid?

<p>A few decades (B)</p> Signup and view all the answers

What is the primary characteristic of the current electrical grid in North America?

<p>It has evolved in piecemeal fashion over the past 100 years (B)</p> Signup and view all the answers

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