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Zorluk: OrtaEnvironmental Impact and Fuel Efficiency

A car owner is looking for practical ways to cut fuel costs and reduce exhaust emissions during daily driving. Which measure will reliably improve their vehicle's fuel efficiency?

  1. A
    Selecting neutral gear when descending hills to allow the engine to idle freely
  2. Dismounting an unused roof rack and removing non-essential heavy items from the vehicleCevap
  3. C
    Under-inflating the road tyres slightly below the manufacturer's recommended level to soften the ride
  4. D
    Travelling at higher cruising speeds on dual carriageways to minimise total engine running time

Cevap

Dismounting an unused roof rack and removing non-essential heavy items from the vehicle
Removing external accessories such as roof racks or roof boxes when they are not in use significantly reduces aerodynamic drag. In addition, taking unnecessary heavy objects out of the boot reduces overall vehicle mass. Together, these measures reduce the engine's required power output, improving miles per gallon (MPG) and cutting exhaust emissions.

Adım Adım Çözüm

1
Evaluate the impact of vehicle weight and aerodynamic drag on engine energy demand.
Excess weight requires more chemical energy to accelerate, and external attachments such as roof racks increase aerodynamic resistance (drag).
Overcoming unnecessary aerodynamic drag and rolling mass forces the engine to burn additional fuel.
2
Assess candidate driving and maintenance actions against eco-safe driving principles.
Removing the roof rack restores streamlined airflow, and clearing heavy items reduces payload mass.
Both adjustments directly minimise engine workload without compromising vehicle safety or control.

Anahtar Kavram

Minimising aerodynamic resistance and vehicle payload optimizes fuel economy and reduces emissions.
Tahmini Süre:1m 0s
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Environmental Impact and Fuel Efficiency

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