APUs reduce fuel use because they use less fuel than idling, which makes them environmentally friendly. Which option correctly reflects this?

APUs reduce fuel use because they use less fuel than idling, which makes them environmentally friendly. Which option correctly reflects this?

• A. They Emit Nitrogen Oxides Into The Air.
• B. They Use Less Fuel Than An Idling Engine.
• C. They Come Standard In Engines Made After 2000.
• D. All Of The Above

Answer: (B)

APUs save fuel by providing electrical power and climate control without running the truck’s main engine, so the main engine doesn’t idle. Since idling FMUs (fuel-use) are wasteful, using an APU reduces overall fuel consumption and the associated emissions, which is why the statement that they use less fuel than an idling engine best reflects their environmental benefit. The claim about emitting nitrogen oxides isn’t what makes APUs environmentally friendly, and there isn’t a universal requirement that APUs be standard in engines built after 2000, so those options aren’t the correct reflection in this context.

APUs save fuel by providing electrical power and climate control without running the truck’s main engine, so the main engine doesn’t idle. Since idling FMUs (fuel-use) are wasteful, using an APU reduces overall fuel consumption and the associated emissions, which is why the statement that they use less fuel than an idling engine best reflects their environmental benefit. The claim about emitting nitrogen oxides isn’t what makes APUs environmentally friendly, and there isn’t a universal requirement that APUs be standard in engines built after 2000, so those options aren’t the correct reflection in this context.