AIR METHODS PRE-HIRE EXAM 2026
250 Multiple Choice Questions with Correct Answers and
Rationales | Latest update| instant download
Practice Preparation Material — Air Medical Transport | Critical Care | Flight Physiology |
Safety & Operations
SECTION 1: FLIGHT PHYSIOLOGY
1. What physiological law explains why a pneumothorax worsens during flight at altitude?
A. Henry's Law B. Boyle's Law (correct answer) C. Dalton's Law D. Charles's Law
Rationale: Boyle's Law states that at constant temperature, the volume of a gas is inversely
proportional to pressure. As altitude increases and barometric pressure decreases, trapped gas
in a pneumothorax expands, potentially converting a simple pneumothorax to a life-threatening
tension pneumothorax.
2. At what altitude does significant hypoxia typically begin in an unacclimatized
individual?
A. 5,000 feet B. 7,000 feet C. 10,000 feet (correct answer) D. 15,000 feet
Rationale: Physiologically significant hypoxia begins around 10,000 feet for unacclimatized
individuals. The FAA mandates supplemental oxygen above 12,500 feet for crew on flights
lasting more than 30 minutes, and above 14,000 feet at all times.
3. During ascent to altitude, a patient with pneumocephalus (air in the cranial vault) is at
risk for:
A. Hypoglycemia B. Expansion of intracranial air causing increased ICP and herniation
(correct answer) C. Pulmonary edema D. Peripheral vasoconstriction
,Rationale: Pneumocephalus is extremely dangerous at altitude. As barometric pressure
decreases, intracranial air expands per Boyle's Law, elevating ICP and potentially causing
cerebral herniation. These patients may require low-altitude transport or pressurized fixed-wing
aircraft.
4. Which gas law explains why air splints must be monitored and adjusted during flight?
A. Henry's Law B. Dalton's Law C. Boyle's Law (correct answer) D. Gay-Lussac's Law
Rationale: Air splints contain gas that expands at altitude as pressure decreases. Increased
pressure within the splint can compromise circulation and cause neurovascular injury. Crews
must monitor and deflate splints as needed during ascent.
5. Decompression sickness in a SCUBA diver being transported by air is best explained by:
A. Boyle's Law B. Henry's Law (correct answer) C. Dalton's Law D. Charles's Law
Rationale: Henry's Law states that the quantity of gas dissolved in a liquid is proportional to the
partial pressure of that gas. During rapid ascent (decompression), dissolved nitrogen comes out
of solution and forms bubbles in tissues and blood, causing decompression sickness.
6. The standard target SpO2 for most critical care transport patients is:
A. Greater than 85% B. Greater than 88% C. Greater than 94% (correct answer) D. 100% at
all times
Rationale: For most critically ill patients, a target SpO2 greater than 94% is recommended. In
COPD patients who are hypoxic-drive dependent, a target of 88–92% may be appropriate.
Hyperoxia can also be harmful in post-cardiac arrest patients.
7. Dalton's Law of Partial Pressures states:
A. Gas volume increases as pressure decreases B. The total pressure of a gas mixture equals
the sum of partial pressures of each component gas (correct answer) C. Gas solubility is
proportional to partial pressure D. Gas pressure increases with temperature
,Rationale: Dalton's Law explains why the partial pressure of oxygen (PO2) decreases at altitude
even though the percentage of oxygen in air (21%) remains constant. Decreasing barometric
pressure reduces PO2, contributing to altitude-induced hypoxia.
8. COPD patients requiring air transport should receive oxygen targeted to:
A. 100% SpO2 via non-rebreather mask B. SpO2 of 88–92% via controlled low-flow oxygen
(correct answer) C. SpO2 of 95–99% via high-flow oxygen D. No supplemental oxygen is
indicated
Rationale: COPD patients may rely on hypoxic drive for respiratory stimulus. Excessive oxygen
can abolish this drive, causing hypoventilation and CO2 retention (CO2 narcosis). Controlled
low-flow oxygen targeting 88–92% maintains adequate oxygenation without suppressing
respiration.
9. Spatial disorientation during flight is most likely caused by:
A. Turbulence affecting cardiac output B. Conflicting vestibular and visual sensory inputs
creating false perception of aircraft attitude (correct answer) C. Medication side effects D.
Fatigue alone
Rationale: The vestibular system is unreliable in flight, particularly in IMC (instrument
meteorological conditions). Illusions such as the "leans" and graveyard spiral result from
conflicting sensory inputs. Crews must trust aircraft instruments over sensory perception.
10. A patient with a bowel obstruction has gas trapped in the intestines. During air
transport to altitude:
A. The gas will compress and the patient will feel relief B. The gas will expand per Boyle's
Law, increasing abdominal pain and distension (correct answer) C. No change will occur
below 10,000 feet D. Gas expansion only affects lung tissue
Rationale: All trapped body gas expands at altitude. Bowel obstruction gas, pneumothorax,
sinus air, and middle ear air all expand during ascent. Patients may experience severe pain and
complications. Low-altitude or pressurized transport should be considered.
SECTION 2: AIRWAY MANAGEMENT
, 11. The gold standard for confirming endotracheal tube placement during air medical
transport is:
A. Auscultation of breath sounds bilaterally B. Chest rise and fall with ventilation C.
Continuous waveform capnography (ETCO2) (correct answer) D. Chest X-ray at the
receiving facility
Rationale: Waveform capnography provides continuous, real-time confirmation of ETT
placement and ventilation. In a noisy aircraft environment, auscultation is unreliable. A
consistent waveform confirms tracheal placement; absence of waveform suggests esophageal
intubation.
12. The most commonly used RSI combination in air medical transport is:
A. Propofol and vecuronium B. Etomidate and succinylcholine (correct answer) C.
Midazolam and rocuronium D. Ketamine and pancuronium
Rationale: Etomidate (0.3 mg/kg IV) provides rapid unconsciousness with hemodynamic
stability. Succinylcholine (1.5 mg/kg IV) provides rapid onset (45–60 seconds) and short
duration (8–10 minutes), ideal for RSI. Together they provide optimal intubating conditions
rapidly.
13. In a "can't intubate, can't oxygenate" (CICO) scenario in an adult, the definitive
intervention is:
A. Continue laryngoscopy attempts B. Insert a King LT airway C. Surgical cricothyrotomy
(correct answer) D. Increase sedation and retry
Rationale: The CICO scenario requires immediate surgical airway access. Scalpel
cricothyrotomy (scalpel-bougie-tube technique) provides a definitive airway when all other
methods fail. Continued failed intubation attempts waste critical time during life-threatening
hypoxia.
14. The correct depth of an oral ETT for an average adult male at the teeth is:
A. 18 cm B. 21–23 cm (correct answer) C. 26–28 cm D. 30 cm
Rationale: For average adult males, the ETT should be secured at 21–23 cm at the teeth. Adult
females typically require 19–21 cm. Depth should always be confirmed with bilateral equal
breath sounds, chest rise, and continuous waveform capnography.
250 Multiple Choice Questions with Correct Answers and
Rationales | Latest update| instant download
Practice Preparation Material — Air Medical Transport | Critical Care | Flight Physiology |
Safety & Operations
SECTION 1: FLIGHT PHYSIOLOGY
1. What physiological law explains why a pneumothorax worsens during flight at altitude?
A. Henry's Law B. Boyle's Law (correct answer) C. Dalton's Law D. Charles's Law
Rationale: Boyle's Law states that at constant temperature, the volume of a gas is inversely
proportional to pressure. As altitude increases and barometric pressure decreases, trapped gas
in a pneumothorax expands, potentially converting a simple pneumothorax to a life-threatening
tension pneumothorax.
2. At what altitude does significant hypoxia typically begin in an unacclimatized
individual?
A. 5,000 feet B. 7,000 feet C. 10,000 feet (correct answer) D. 15,000 feet
Rationale: Physiologically significant hypoxia begins around 10,000 feet for unacclimatized
individuals. The FAA mandates supplemental oxygen above 12,500 feet for crew on flights
lasting more than 30 minutes, and above 14,000 feet at all times.
3. During ascent to altitude, a patient with pneumocephalus (air in the cranial vault) is at
risk for:
A. Hypoglycemia B. Expansion of intracranial air causing increased ICP and herniation
(correct answer) C. Pulmonary edema D. Peripheral vasoconstriction
,Rationale: Pneumocephalus is extremely dangerous at altitude. As barometric pressure
decreases, intracranial air expands per Boyle's Law, elevating ICP and potentially causing
cerebral herniation. These patients may require low-altitude transport or pressurized fixed-wing
aircraft.
4. Which gas law explains why air splints must be monitored and adjusted during flight?
A. Henry's Law B. Dalton's Law C. Boyle's Law (correct answer) D. Gay-Lussac's Law
Rationale: Air splints contain gas that expands at altitude as pressure decreases. Increased
pressure within the splint can compromise circulation and cause neurovascular injury. Crews
must monitor and deflate splints as needed during ascent.
5. Decompression sickness in a SCUBA diver being transported by air is best explained by:
A. Boyle's Law B. Henry's Law (correct answer) C. Dalton's Law D. Charles's Law
Rationale: Henry's Law states that the quantity of gas dissolved in a liquid is proportional to the
partial pressure of that gas. During rapid ascent (decompression), dissolved nitrogen comes out
of solution and forms bubbles in tissues and blood, causing decompression sickness.
6. The standard target SpO2 for most critical care transport patients is:
A. Greater than 85% B. Greater than 88% C. Greater than 94% (correct answer) D. 100% at
all times
Rationale: For most critically ill patients, a target SpO2 greater than 94% is recommended. In
COPD patients who are hypoxic-drive dependent, a target of 88–92% may be appropriate.
Hyperoxia can also be harmful in post-cardiac arrest patients.
7. Dalton's Law of Partial Pressures states:
A. Gas volume increases as pressure decreases B. The total pressure of a gas mixture equals
the sum of partial pressures of each component gas (correct answer) C. Gas solubility is
proportional to partial pressure D. Gas pressure increases with temperature
,Rationale: Dalton's Law explains why the partial pressure of oxygen (PO2) decreases at altitude
even though the percentage of oxygen in air (21%) remains constant. Decreasing barometric
pressure reduces PO2, contributing to altitude-induced hypoxia.
8. COPD patients requiring air transport should receive oxygen targeted to:
A. 100% SpO2 via non-rebreather mask B. SpO2 of 88–92% via controlled low-flow oxygen
(correct answer) C. SpO2 of 95–99% via high-flow oxygen D. No supplemental oxygen is
indicated
Rationale: COPD patients may rely on hypoxic drive for respiratory stimulus. Excessive oxygen
can abolish this drive, causing hypoventilation and CO2 retention (CO2 narcosis). Controlled
low-flow oxygen targeting 88–92% maintains adequate oxygenation without suppressing
respiration.
9. Spatial disorientation during flight is most likely caused by:
A. Turbulence affecting cardiac output B. Conflicting vestibular and visual sensory inputs
creating false perception of aircraft attitude (correct answer) C. Medication side effects D.
Fatigue alone
Rationale: The vestibular system is unreliable in flight, particularly in IMC (instrument
meteorological conditions). Illusions such as the "leans" and graveyard spiral result from
conflicting sensory inputs. Crews must trust aircraft instruments over sensory perception.
10. A patient with a bowel obstruction has gas trapped in the intestines. During air
transport to altitude:
A. The gas will compress and the patient will feel relief B. The gas will expand per Boyle's
Law, increasing abdominal pain and distension (correct answer) C. No change will occur
below 10,000 feet D. Gas expansion only affects lung tissue
Rationale: All trapped body gas expands at altitude. Bowel obstruction gas, pneumothorax,
sinus air, and middle ear air all expand during ascent. Patients may experience severe pain and
complications. Low-altitude or pressurized transport should be considered.
SECTION 2: AIRWAY MANAGEMENT
, 11. The gold standard for confirming endotracheal tube placement during air medical
transport is:
A. Auscultation of breath sounds bilaterally B. Chest rise and fall with ventilation C.
Continuous waveform capnography (ETCO2) (correct answer) D. Chest X-ray at the
receiving facility
Rationale: Waveform capnography provides continuous, real-time confirmation of ETT
placement and ventilation. In a noisy aircraft environment, auscultation is unreliable. A
consistent waveform confirms tracheal placement; absence of waveform suggests esophageal
intubation.
12. The most commonly used RSI combination in air medical transport is:
A. Propofol and vecuronium B. Etomidate and succinylcholine (correct answer) C.
Midazolam and rocuronium D. Ketamine and pancuronium
Rationale: Etomidate (0.3 mg/kg IV) provides rapid unconsciousness with hemodynamic
stability. Succinylcholine (1.5 mg/kg IV) provides rapid onset (45–60 seconds) and short
duration (8–10 minutes), ideal for RSI. Together they provide optimal intubating conditions
rapidly.
13. In a "can't intubate, can't oxygenate" (CICO) scenario in an adult, the definitive
intervention is:
A. Continue laryngoscopy attempts B. Insert a King LT airway C. Surgical cricothyrotomy
(correct answer) D. Increase sedation and retry
Rationale: The CICO scenario requires immediate surgical airway access. Scalpel
cricothyrotomy (scalpel-bougie-tube technique) provides a definitive airway when all other
methods fail. Continued failed intubation attempts waste critical time during life-threatening
hypoxia.
14. The correct depth of an oral ETT for an average adult male at the teeth is:
A. 18 cm B. 21–23 cm (correct answer) C. 26–28 cm D. 30 cm
Rationale: For average adult males, the ETT should be secured at 21–23 cm at the teeth. Adult
females typically require 19–21 cm. Depth should always be confirmed with bilateral equal
breath sounds, chest rise, and continuous waveform capnography.
