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Question 5605

You are driving with the air conditioning on; if you increase your speed, does fuel consumption also increase?

  1. No, fuel consumption is the same; it does not depend on speed.
  2. Only if the temperature inside the passenger compartment is above 25°.
  3. Yes, the higher the speed, the more energy the air conditioning consumes.
Show answer and explanation

Correct answer: Yes, the higher the speed, the more energy the air conditioning consumes.

Yes. The faster you go, the more fuel you use, because air resistance increases with the square of speed. The same applies with the air conditioning on, and the system adds another 10% to 20% to fuel consumption. The temperature inside the passenger compartment does not change this.

Manual II. Cuestiones de Seguridad Vial (DGT, 2026) · Manual II. Cuestiones de Seguridad Vial (DGT, 2026)