The principle behind a hybrid electric vehicle is that it
A) runs with conventional fuel but the motor shuts off when going downhill.
B) has a battery-powered electric motor in addition to a conventional engine.
C) has a small nuclear reactor in addition to a conventional engine.
D) runs on its electric battery except when starting the engine or travelling at speeds in excess of 90 mph.
Question 2
The difference between a plug-in hybrid and an electric car is that the plug-in hybrid
A) will not operate unless continuously connected to an AC electrical source.
B) uses less carbon-based fuel than an electric car.
C) still uses an engine and needs fuel whereas the electric car runs entirely on its battery.
D) has a small battery and will run only 25 as far as an electric car.
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