Most of the increase in fuel efficiency of hybrid vehicles comes from
A)charging electric batteries when decelerating,idling or coasting.
B)charging electric batteries when cruising down the highway.
C)enclosing most of the wheels and other aerodynamic designs.
D)the use of smaller engines that produce less power and slower acceleration.

Question

Quizplus · Accepted Answer

The increase in fuel efficiency of hybrid vehicles comes mainly from the charging of electric batteries when decelerating, idling or coasting. This process is known as regenerative braking, and it allows the vehicle to recover some of the energy that would have been lost as heat during braking. This electric energy can then be used to power the electric motor during low-speed cruising or acceleration, which reduces the load on the gasoline engine and leads to better fuel efficiency. Enclosing most of the wheels and other aerodynamic designs can also help improve fuel efficiency but is not the main factor contributing to the increase in hybrid vehicle efficiency. Similarly, while smaller engines can improve efficiency, they are not limited to hybrid vehicles and are not the main reason why hybrid vehicles are more efficient.

Most of the Increase in Fuel Efficiency of Hybrid Vehicles