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Exam (elaborations)

BESC chap 20 Questions with Correct Answers

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BESC chap 20 Questions with Correct Answers Which of the following is true regarding fuel cell technology - Answer-They are only about 40-45% efficient A ____ is used to remove hydrogen from various fuels to be used in fuel cells. - Answer-Reformer Which of the following is not normally co...

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  • August 27, 2024
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BESC chap 20 Questions with
Correct Answers
Which of the following is true regarding fuel cell technology - Answer-They are only
about 40-45% efficient

A ____ is used to remove hydrogen from various fuels to be used in fuel cells. - Answer-
Reformer

Which of the following is not normally considered a biomass fuel? - Answer-All of these
are biomass fuels
(Wood, Bark, Waste wood chips, Branches)

In the United States and Canada, the most common problem with using wood as a
major heat source is - Answer-None of these

Very few living trees are cut down for fuel in _____ because twigs, branches and crop
residues are used for fuel. However, in ______ the forests are nearly gone and even
fruit trees cut for fuel. - Answer-Pakistan; Haiti

_____ is being used to produce ethanol and lessen the dependence on oil. - Answer-All
of the above are being grown for ethanol production (Palm oil, corn, miscanthus grass,
soybeans)

Jatropha is a good source for biodiesel because - Answer-It's nuts have a high energy
content

Manure or dung makes a good fuel except that it is - Answer-Needed to rebuild the soil

Burning methane form dung - Answer-All of these

Since the 1920s, hydropower production has - Answer-Risen, but not as fast as fossil
fuel use

Siltation and decreased water quality are especially significant problems with - Answer-
Huge dams on major rivers

Low-head hydropower involves ____ dams on ___ rivers - Answer-small; minor

Some highly efficient turbines can be submerged directly in a river and require only
______ to operate - Answer-Run-of-the-river flow

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