CFRN EXAM WITH QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTIONS | 2026/2027 LATEST UPDATE | GRADED A+
Which gas law explains why a pneumothorax expands as an unpressurized cabin ascends? -
CORRECT|ANSWER
Boyle's law
Request the pilot fly at the lowest, safest altitude.
Gases expand at higher altitudes -
CORRECT|ANSWER
Boyle's law
Which gas law explains why oxygen tank pressures may change between takeoff and at altitudes? -
CORRECT|ANSWER
Gay-Lussac's Law
Oxygen tank pressures decrease at higher altitude due to cooler temperatures shrinking gases -
CORRECT|ANSWER
Gay-Lussac's Law
Which gas law depicts why flight crews may be able to transport an obese patient in an aircraft in
winter that they couldn't transport in warmer months? -
CORRECT|ANSWER
Charle's Law
Describes how cooer air is denser, allowing the wings to create more lift in cold temperatures -
CORRECT|ANSWER
Charle's Law
Night vision deterioration starts at what altitude? -
CORRECT|ANSWER
, Night vision loss begins at 5,000 ft in the indifferent stage of hypoxia, along w/ an increase
respiratory and heart rate.
What does hypoxia hypoxia cause? -
CORRECT|ANSWER
Impedes alveolar gas exchange. The decreased barometric pressure at high altitude causes hypoxia,
so hypoxia hypoxia may be referred to as altitude hypoxia.
A patient w/ emphysema/COPD may experience which type of hypoxia during air transport? -
CORRECT|ANSWER
Hypoxic
A patient w/ an active GI bleed may experience which type of hypoxia during transport? -
CORRECT|ANSWER
Hypemic hypoxia
(rhymes w/ anemic, cellular hypoxia largely due to blood loss or anemia)
Pts w/ carbon monoxide and cyanide exposure may experience which two types of hypoxia? -
CORRECT|ANSWER
Histotoxic and Hypemic
Historic Hypoxia - alcohol, cyanide, and carbon monoxide poisoning, resulting in the cells inability to
use oxygen.
Cyanide poisoning tx -
CORRECT|ANSWER
Hydroxycobalamin
Increase in attitude increases or decreases humidity and temperature -
CORRECT|ANSWER
decreases both
What injuries are expected from overpressure after an explosion? -
,CORRECT|ANSWER
Pneumothorax.
Occurs when the shock wave travels through the air and damages the grass filled organs like the
lunges. Second injury is from flying debris, thus penetrating injury.
Tertiary head injuries from being thrown to the ground.
Quaternary injuries from burns.
Undergarments worn under the fire resistant flight suit should be made of natural fibers and should
be made of natural fibers, how much air space should be between suit and garments? -
CORRECT|ANSWER
0.25 inch
When a helicopter lands on a slope or uneven terrain, what is the best way to approach and depart
the aircraft? -
CORRECT|ANSWER
From the downhill side, in a crouched position.
How do you manage an in flight emergency? -
CORRECT|ANSWER
aviate, navigate, communicate
The priorities are to retain control of the aircraft, choose and appropriate emergency landing site,
then report the emergency to the program communication center.
An impact that exceeds how many G's will automatically activate the emergency locator transmitter?
-
CORRECT|ANSWER
4
Which universal distress frequency transmits a digital signal including GPS location after ELT
activation? -
CORRECT|ANSWER
406MHz
, The pilot fails to check the power during lift off and the helicopter impacts the ground and smoke fills
the cockpit. What is the nurse's priority action? -
CORRECT|ANSWER
Exit the aircraft and meet at a pre-designated location (12 o'clock position)
Which intervention should be performed first for a patient in resp. distress due to a simple
pneumothorax? -
CORRECT|ANSWER
Chest Tube
Insertion should be performed prior to bipap, bipap can push a simple pneumothorax to a tension
pneumothorax.
Interpret ABG: pH 7.25, PaO2 40, HCO3 15 -
CORRECT|ANSWER
metabolic acidosis
Metabolic Acidosis conditions: -
CORRECT|ANSWER
ketoacidosis, salicylate, methanol, ethylene glycol ingestion, renal failure, diarrhea, and lactic
acidosis from shock.
Interpret ABG: pH 7.33, PaO2 32, HCO3 18 -
CORRECT|ANSWER
Partial compensated metabolic acidosis
Which induction agent is preferred in head trauma since it has little to no effect on MAP and
decreases ICP? -
CORRECT|ANSWER
Etomidate
drawbacks of etomidate is that it doesn't provide analgesia and possible adrenal suppression.
What is the amount of blood in the ventricles at end diastole? -
CORRECT|ANSWER
SOLUTIONS | 2026/2027 LATEST UPDATE | GRADED A+
Which gas law explains why a pneumothorax expands as an unpressurized cabin ascends? -
CORRECT|ANSWER
Boyle's law
Request the pilot fly at the lowest, safest altitude.
Gases expand at higher altitudes -
CORRECT|ANSWER
Boyle's law
Which gas law explains why oxygen tank pressures may change between takeoff and at altitudes? -
CORRECT|ANSWER
Gay-Lussac's Law
Oxygen tank pressures decrease at higher altitude due to cooler temperatures shrinking gases -
CORRECT|ANSWER
Gay-Lussac's Law
Which gas law depicts why flight crews may be able to transport an obese patient in an aircraft in
winter that they couldn't transport in warmer months? -
CORRECT|ANSWER
Charle's Law
Describes how cooer air is denser, allowing the wings to create more lift in cold temperatures -
CORRECT|ANSWER
Charle's Law
Night vision deterioration starts at what altitude? -
CORRECT|ANSWER
, Night vision loss begins at 5,000 ft in the indifferent stage of hypoxia, along w/ an increase
respiratory and heart rate.
What does hypoxia hypoxia cause? -
CORRECT|ANSWER
Impedes alveolar gas exchange. The decreased barometric pressure at high altitude causes hypoxia,
so hypoxia hypoxia may be referred to as altitude hypoxia.
A patient w/ emphysema/COPD may experience which type of hypoxia during air transport? -
CORRECT|ANSWER
Hypoxic
A patient w/ an active GI bleed may experience which type of hypoxia during transport? -
CORRECT|ANSWER
Hypemic hypoxia
(rhymes w/ anemic, cellular hypoxia largely due to blood loss or anemia)
Pts w/ carbon monoxide and cyanide exposure may experience which two types of hypoxia? -
CORRECT|ANSWER
Histotoxic and Hypemic
Historic Hypoxia - alcohol, cyanide, and carbon monoxide poisoning, resulting in the cells inability to
use oxygen.
Cyanide poisoning tx -
CORRECT|ANSWER
Hydroxycobalamin
Increase in attitude increases or decreases humidity and temperature -
CORRECT|ANSWER
decreases both
What injuries are expected from overpressure after an explosion? -
,CORRECT|ANSWER
Pneumothorax.
Occurs when the shock wave travels through the air and damages the grass filled organs like the
lunges. Second injury is from flying debris, thus penetrating injury.
Tertiary head injuries from being thrown to the ground.
Quaternary injuries from burns.
Undergarments worn under the fire resistant flight suit should be made of natural fibers and should
be made of natural fibers, how much air space should be between suit and garments? -
CORRECT|ANSWER
0.25 inch
When a helicopter lands on a slope or uneven terrain, what is the best way to approach and depart
the aircraft? -
CORRECT|ANSWER
From the downhill side, in a crouched position.
How do you manage an in flight emergency? -
CORRECT|ANSWER
aviate, navigate, communicate
The priorities are to retain control of the aircraft, choose and appropriate emergency landing site,
then report the emergency to the program communication center.
An impact that exceeds how many G's will automatically activate the emergency locator transmitter?
-
CORRECT|ANSWER
4
Which universal distress frequency transmits a digital signal including GPS location after ELT
activation? -
CORRECT|ANSWER
406MHz
, The pilot fails to check the power during lift off and the helicopter impacts the ground and smoke fills
the cockpit. What is the nurse's priority action? -
CORRECT|ANSWER
Exit the aircraft and meet at a pre-designated location (12 o'clock position)
Which intervention should be performed first for a patient in resp. distress due to a simple
pneumothorax? -
CORRECT|ANSWER
Chest Tube
Insertion should be performed prior to bipap, bipap can push a simple pneumothorax to a tension
pneumothorax.
Interpret ABG: pH 7.25, PaO2 40, HCO3 15 -
CORRECT|ANSWER
metabolic acidosis
Metabolic Acidosis conditions: -
CORRECT|ANSWER
ketoacidosis, salicylate, methanol, ethylene glycol ingestion, renal failure, diarrhea, and lactic
acidosis from shock.
Interpret ABG: pH 7.33, PaO2 32, HCO3 18 -
CORRECT|ANSWER
Partial compensated metabolic acidosis
Which induction agent is preferred in head trauma since it has little to no effect on MAP and
decreases ICP? -
CORRECT|ANSWER
Etomidate
drawbacks of etomidate is that it doesn't provide analgesia and possible adrenal suppression.
What is the amount of blood in the ventricles at end diastole? -
CORRECT|ANSWER
