Alternative Energy Sources Are Currently Being Researched in Effort to Replace

question 50

Multiple Choice

Alternative energy sources are currently being researched in effort to replace our dependence on fossil fuels.Which is not a current research effort in this regard?

• A)obtaining alternative fuels from renewable sources such as garbage
• B)reintroducing the use of tetraethyl lead to increase the octane rating of gasoline
• C)converting coal into gaseous and liquid fuels similar to petroleum products
• D)increasing the use of farm product biomass,such as corn,to produce ethanol.

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Definitions:

Three-phase Alternator

An electric generator that produces three separate waves of alternating current, delivering power at constant rates.

Output Frequency

The frequency at which an electronic device, such as an oscillator or amplifier, outputs its signal.

Revolving Armature Type

A design in electrical generators where the armature, or the part that generates electricity, rotates within a stationary magnetic field.

Sliprings

Circular bands of metal placed on the rotating part of a machine. Carbon brushes riding in contact with the sliprings provide connection to the external circuit.