Driving with the windows down...
If the vehicle windows are down, this will cause the car to be less aerodynamic, thus increasing fuel usage.
Especially at high speeds, aerodynamic drag occurs, which has to do with the opposition of the wind to the movement of the vehicle, resulting in this increase in fuel.
Another official driving test related
In a passenger car, how many reflective vests must be carried?
May seat position affect safety belt efficiency?
Is it wise to install the holder for the GPS next to an airbag?
Seat belts in the back seats...
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