On summer flights, the cabin-heat controls remain untouched. But on a chilly autumn evening, a passenger asks, "Are all airplanes this cold?" You answer, "Of course not!" and pull the sticky heat knob until warmish air, smelling faintly of mouse urine, fills the cabin, along with possible carbon monoxide (CO). What are symptoms of carbon-monoxide poisoning?
If you enjoyed taking this interactive quiz and would like to see more like it, go to the AVweb Brainteaser page. And if you thought it was unfair, confusing, or a waste of time, we'd like you to tell us that, too. And if you have an idea for a subject that you think would make a good future Brainteaser quiz, be sure to let us know.