Double-exposures result in low-density images

Which of the following statements regarding furnaces is MOST accurate?

A. Floor furnaces require temperature-limit controls. B. Wall furnaces are located in the basements of houses. C. Gravity furnaces rely on a fan to move heated air through the system. D. Forced-air furnaces operate primarily by the circulation of air without the use of fans.

You are by the side of a young female college student who is unresponsive. Friends say that she is not a heavy drinker, but tonight she drank an excessive amount of alcohol. She responds to painful stimuli and has snoring respirations. Her respiratory rate is 8 breaths per minute and her radial pulse is weak. Your immediate action would be to:

A) determine if drugs are also involved. B) perform the head-tilt/chin-lift maneuver. C) administer positive pressure ventilation. D) apply oxygen via a nonrebreather mask.