The correct answer is A. The first step in airway assessment of an unresponsive patient is to open the airway using head-tilt, chin-lift (or jaw-thrust if spinal injury suspected) to allow visualization and access. B is incorrect because you must first open the airway to properly see and access potential obstructions. C is incorrect because airway adjuncts are inserted after opening and clearing the airway. D is incorrect because ventilation comes after ensuring the airway is open and clear.

The correct answer is B. The jaw-thrust maneuver is used when cervical spine injury is suspected because it opens the airway without extending the neck, minimizing spinal movement. A is incorrect because conscious patients typically maintain their own airway and positioning preference. C is incorrect because dentures don't determine airway opening technique choice. D is incorrect because the type of ventilation doesn't dictate which airway opening method to use.

The correct answer is C. Basilar skull fractures can create a pathway from the nasal cavity to the brain, making NPA insertion dangerous as it could potentially penetrate brain tissue. A is incorrect because intact gag reflex is actually an indication for NPA over OPA. B is incorrect because altered mental status patients often benefit from NPAs. D is incorrect because NPAs can be used with bag-valve-mask ventilation.

The correct answer is B. Suctioning should be limited to 10 seconds per attempt to prevent hypoxia, as suctioning removes oxygen along with secretions from the airway. A is incorrect because 5 seconds may be insufficient to clear significant obstructions. C is incorrect because 15 seconds is too long and increases hypoxia risk. D is incorrect because 20 seconds would cause dangerous oxygen depletion and potential patient harm.

The correct answer is C. The ability to speak clearly and cough forcefully indicates that the airway is clear and air is moving effectively through the vocal cords. A is incorrect because unconsciousness indicates worsening condition and potential complete obstruction. B is incorrect because increased wheezing suggests ongoing partial obstruction. D is incorrect because pale skin color indicates poor oxygenation and ongoing airway compromise.

The correct answer is B. Gagging or signs of vomiting indicate the return of protective reflexes, making the OPA inappropriate and potentially dangerous as it could stimulate more vomiting. A is incorrect because increased respiratory rate doesn't necessarily indicate OPA problems. C is incorrect because improving oxygen saturation suggests the OPA is working effectively. D is incorrect because OPAs can be used effectively with bag-valve-mask ventilation.

The correct answer is B. Shallow, inadequate breathing requires assisted ventilation with a bag-valve-mask to ensure adequate oxygenation and ventilation. A is incorrect because the OPA is appropriate for this unconscious patient and doesn't need replacement. C is incorrect because repositioning won't address the inadequate breathing that requires immediate intervention. D is incorrect because passive oxygen delivery won't correct inadequate ventilation; active assistance is needed.

The correct answer is B. Gurgling or wet sounds indicate the presence of fluids (blood, vomit, secretions) in the airway that require immediate suctioning for removal. A is incorrect because rapid, shallow breathing alone doesn't necessarily indicate need for suctioning. C is incorrect because cyanosis indicates poor oxygenation but not necessarily fluid in the airway. D is incorrect because decreased consciousness alone doesn't indicate suctioning needs unless accompanied by fluid sounds.

The correct answer is B. Improved air movement and easier ventilation directly indicate that the airway adjunct is maintaining airway patency and functioning as intended. A is incorrect because lack of gag reflex indicates appropriate unconsciousness level but not necessarily proper positioning. C is incorrect because security of placement doesn't indicate functional effectiveness. D is incorrect because oxygen saturation improvement depends on multiple factors beyond just airway adjunct positioning.

The correct answer is B. When cervical spine injury is not suspected, the head-tilt, chin-lift maneuver is the preferred method as it effectively opens the airway by lifting the tongue off the posterior pharynx. A is incorrect because jaw-thrust is reserved for when spinal injury IS suspected. C is incorrect because 'triple airway maneuver' is not a standard EMT technique. D is incorrect because combining jaw-thrust with head-tilt defeats the spinal protection purpose of jaw-thrust.