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Example Questions
Example Question #1 : Hydrogen And Fuel Cells
Which of the following is NOT a drawback of utilizing hydrogen as a fuel source?
Possible Answers:
The input of energy to produce hydrogen is often greater than the energy of the resulting hydrogen.
Hydrogen has a low energy density by volume.
Existing infrastructure for manufacturing and transporting hydrogen is minimal to nonexistent.
Hydrogen is very challenging and dangerous to transport.
Hydrogen has a low energy density by weight.
Correct answer:
Hydrogen has a low energy density by weight.
Explanation:
Hydrogen is very challenging to transport and it requires a large energy investment to produce it. While hydrogen has a low energy density by volume, it actually has a very high energy density by weight. This has to do with the fact that hydrogen, discussed in this context, is a gas.
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