Achieve Greater Fuel Economy with a Diesel Electric Hybrid?

Achieve Greater Fuel Economy with a Diesel Electric Hybrid?
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The diesel hybrid is designed to increase fuel efficiency when compared to a gasoline hybrid. Because of the greater efficiencies of a diesel engine, it provides better fuel mileage and diesel contains approximately 10% more energy per gallon than gasoline. Diesels may achieve a fuel economy rating 50% higher than gasoline models. Couple these benefits to a hybrid and you can achieve significant cost savings over a gasoline-electric hybrid.
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Description : The output of a diesel engine can be increased without increasing the engine size in following way a. injecting more fuel b. increasing flywheel size c. scavenging d. supercharging

Last Answer : ANSWER d. supercharging