ENERGY
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Science Bowl Question

📅 NSB 2011🎓 HS🔄 Round 8#️⃣ Q14🌟 Bonus📝 Multiple Choice

Which of the following vehicle engine technologies improves engine fuel efficiency the most?

W) Cylinder deactivation
X) Direct fuel injection and a turbocharger
Y) Integrated starter/generator
Z) Variable valve timing and lift
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