AVIT 309 Test 1 Questions and Answers Fully Solved Latest Update 2025
What is the largest cause of fatalities in commercial aviation? - Answers an inappropriate response
response leading to loss of control in flight
Where is the physiological defiant zone? - Answers above 10,000ft
How long does it take a person to acclimate to a location at a higher altitude? - Answers 18 days per mile
Where is the greatest change in pressure in our atmosphere? - Answers surface to 10,000ft
Boyle's Law - Answers Pressure and volume of a certain amount of gas are constant (explains trapped
gas)
Charles Law - Answers As gas is heated, its volume increases
If the volume is stable the pressure increases (explains variation of pressure gauges in extreme
environments)
Henry's Law - Answers The amount of gas dissolved in a solution is proportional to the partial pressure
of gas over the solutions (explains rapid decompression)
When the pressure drops the gas is supersaturated comes out of solution and bubbles form
Dalton's Law - Answers Each component of all gas contributes to the total pressure (explains hypoxia)
Law of Gaseous Diffusion - Answers Gases will diffuse from higher pressure/concentration to a low
pressure/concentration naturally. Ex. smells spread, smoke diffuses (explains movement of gas in lungs
and blood)
What are the four steps in gas exchange with each cell - Answers Ventilation, Diffusion, Oxygen
Transport, Utilization
What is homeostasis? - Answers the condition compatible with optimum cellular & bodily function
What in the Red Blood Cell enables it to carry oxygen? - Answers hemoglobin
What factors determine the PAO2? - Answers O2, pressure gradient, CO2, water vapor,
What is the main factor determining amount of O2 absorbed in lungs - Answers Partial pressure gradient
What are common symptoms of trapped gas problems? - Answers pain
What are common symptoms of decompression sickness? - Answers nitrogen bubbles trying to escape
from a persons body
,What is the recommended treatment of hypoxic hypoxia at altitude? - Answers -100% oxygen with
pressure
What is the lower limit of the zone of physiologic deficiency? - Answers 95%- 85%
In which of the 10,000 foot intervals is the barometric pressure change the greatest? - Answers sea level
- 10000 ft
Define the zone of physiologic deficiency? - Answers unable to function without some type of life
support
What is effective performance time? - Answers its the time from the first point you start getting hypoxic
until you can no longer perform tasks
Which toxin has the highest incidence of presence in smoke from aircraft fires? - Answers carbon
monoxide
Which toxin causes histotoxic hypoxia? - Answers carbon monoxide, cyanide, narcotics, alcohol
Which gas level in a person's blood will change the most as a result from hyperventilating? - Answers
carbon dioxide
Which law describes how nitrogen in your body tissues will come out of solution (in the form of bubbles)
with decreasing pressure? - Answers henry's law
Which oxygen delivery system will best protect the user in a toxic exposure emergency? - Answers
pressure and diluted demand regulator
What causes an aircraft cabin flashover? - Answers when combustible gases gases ignite at 400 deg F
causing the temp in cabin to climb to 1200+ degrees F
Name several cases that are primarily surface irritants: affecting the eyes, nose, mouth, throat and
lungs? - Answers aerosolized gases, burn hydraulic fluid oil, CO, cyanide
Why do pilots utilize pressure breathing? - Answers to decrease nitrogen in body
Explain the physiology of using pressure- breathing equipment - Answers
Which toxin causes histotoxic hypoxia? - Answers ]cyanide, narcotics, alcohol
Which physiologic problems ate more likely to occur on descent, rather than ascent in an unpressurized
aircraft? - Answers sinus and ear block
What is effective performance time? - Answers
What does pre-breathing 100% oxygen do to your nitrogen and cartoon dioxide levels in your blood? -
Answers decreases nitrogen
, What is the average effective performance time at 25,000 feet - Answers 3-5 minutes
Which toxin causes symptoms at the lowest concentration or dosages? - Answers cyanide
Which aircraft occupants primarily use chemical oxygen generators (sodium chlorate candles) - Answers
passangers
What type of hypoxia is caused by cabin monoxide poisoning? - Answers hypemic
What type of hypoxia is caused by carbon dioxide poisoning? - Answers hypoxic
What is the minimum recommended waiting time before going to flight altitudes above 8000 feet after
any SCUBA diving? - Answers 24 hours
According to the oxygen use regulations (91.211) what must occur when an unpressurized aircraft
reaches an altitude above 12,500 feet? - Answers pilots and crew must go on oxygen
Vasoconstrictor sprays only work for a short period of time to control nasal congestion. Based on this
information and our discussions in class, when are vasoconstrictors nasal sprays recommended to be
used in aviation operations? - Answers during emergencies
You move to an airport based at an elevation of 13,400 feet. Can most people acclimate to this elevation
and if so how long would you expect to take to fully physiologically acclimatize to that elevation? -
Answers 45 days
When should the EVAS be deployed? - Answers after oxygen mask is on
You find what looks like a pressurized tank in a civilian setting and the press causes indicates 450 psi.
What is most likely inside? - Answers air pressure
When dealing with an in-flight fire onboard a passenger aircraft the first course of action for you as a
pilot is to do what? - Answers 100% oxygen with pressure
When is the best time to perform a valsalva maneuver during descent - Answers - level off
- valsalva
- climb 1-2000 ft
-valsalva
Carbon monoxide and cyanide gas are common products of combustion. When they are both present in
aircraft fires what effect do they have when combined? - Answers they kill people
Factors that effect human performance are... - Answers fatigue, stress, monitoring, automation mode
awareness
What is the largest cause of fatalities in commercial aviation? - Answers an inappropriate response
response leading to loss of control in flight
Where is the physiological defiant zone? - Answers above 10,000ft
How long does it take a person to acclimate to a location at a higher altitude? - Answers 18 days per mile
Where is the greatest change in pressure in our atmosphere? - Answers surface to 10,000ft
Boyle's Law - Answers Pressure and volume of a certain amount of gas are constant (explains trapped
gas)
Charles Law - Answers As gas is heated, its volume increases
If the volume is stable the pressure increases (explains variation of pressure gauges in extreme
environments)
Henry's Law - Answers The amount of gas dissolved in a solution is proportional to the partial pressure
of gas over the solutions (explains rapid decompression)
When the pressure drops the gas is supersaturated comes out of solution and bubbles form
Dalton's Law - Answers Each component of all gas contributes to the total pressure (explains hypoxia)
Law of Gaseous Diffusion - Answers Gases will diffuse from higher pressure/concentration to a low
pressure/concentration naturally. Ex. smells spread, smoke diffuses (explains movement of gas in lungs
and blood)
What are the four steps in gas exchange with each cell - Answers Ventilation, Diffusion, Oxygen
Transport, Utilization
What is homeostasis? - Answers the condition compatible with optimum cellular & bodily function
What in the Red Blood Cell enables it to carry oxygen? - Answers hemoglobin
What factors determine the PAO2? - Answers O2, pressure gradient, CO2, water vapor,
What is the main factor determining amount of O2 absorbed in lungs - Answers Partial pressure gradient
What are common symptoms of trapped gas problems? - Answers pain
What are common symptoms of decompression sickness? - Answers nitrogen bubbles trying to escape
from a persons body
,What is the recommended treatment of hypoxic hypoxia at altitude? - Answers -100% oxygen with
pressure
What is the lower limit of the zone of physiologic deficiency? - Answers 95%- 85%
In which of the 10,000 foot intervals is the barometric pressure change the greatest? - Answers sea level
- 10000 ft
Define the zone of physiologic deficiency? - Answers unable to function without some type of life
support
What is effective performance time? - Answers its the time from the first point you start getting hypoxic
until you can no longer perform tasks
Which toxin has the highest incidence of presence in smoke from aircraft fires? - Answers carbon
monoxide
Which toxin causes histotoxic hypoxia? - Answers carbon monoxide, cyanide, narcotics, alcohol
Which gas level in a person's blood will change the most as a result from hyperventilating? - Answers
carbon dioxide
Which law describes how nitrogen in your body tissues will come out of solution (in the form of bubbles)
with decreasing pressure? - Answers henry's law
Which oxygen delivery system will best protect the user in a toxic exposure emergency? - Answers
pressure and diluted demand regulator
What causes an aircraft cabin flashover? - Answers when combustible gases gases ignite at 400 deg F
causing the temp in cabin to climb to 1200+ degrees F
Name several cases that are primarily surface irritants: affecting the eyes, nose, mouth, throat and
lungs? - Answers aerosolized gases, burn hydraulic fluid oil, CO, cyanide
Why do pilots utilize pressure breathing? - Answers to decrease nitrogen in body
Explain the physiology of using pressure- breathing equipment - Answers
Which toxin causes histotoxic hypoxia? - Answers ]cyanide, narcotics, alcohol
Which physiologic problems ate more likely to occur on descent, rather than ascent in an unpressurized
aircraft? - Answers sinus and ear block
What is effective performance time? - Answers
What does pre-breathing 100% oxygen do to your nitrogen and cartoon dioxide levels in your blood? -
Answers decreases nitrogen
, What is the average effective performance time at 25,000 feet - Answers 3-5 minutes
Which toxin causes symptoms at the lowest concentration or dosages? - Answers cyanide
Which aircraft occupants primarily use chemical oxygen generators (sodium chlorate candles) - Answers
passangers
What type of hypoxia is caused by cabin monoxide poisoning? - Answers hypemic
What type of hypoxia is caused by carbon dioxide poisoning? - Answers hypoxic
What is the minimum recommended waiting time before going to flight altitudes above 8000 feet after
any SCUBA diving? - Answers 24 hours
According to the oxygen use regulations (91.211) what must occur when an unpressurized aircraft
reaches an altitude above 12,500 feet? - Answers pilots and crew must go on oxygen
Vasoconstrictor sprays only work for a short period of time to control nasal congestion. Based on this
information and our discussions in class, when are vasoconstrictors nasal sprays recommended to be
used in aviation operations? - Answers during emergencies
You move to an airport based at an elevation of 13,400 feet. Can most people acclimate to this elevation
and if so how long would you expect to take to fully physiologically acclimatize to that elevation? -
Answers 45 days
When should the EVAS be deployed? - Answers after oxygen mask is on
You find what looks like a pressurized tank in a civilian setting and the press causes indicates 450 psi.
What is most likely inside? - Answers air pressure
When dealing with an in-flight fire onboard a passenger aircraft the first course of action for you as a
pilot is to do what? - Answers 100% oxygen with pressure
When is the best time to perform a valsalva maneuver during descent - Answers - level off
- valsalva
- climb 1-2000 ft
-valsalva
Carbon monoxide and cyanide gas are common products of combustion. When they are both present in
aircraft fires what effect do they have when combined? - Answers they kill people
Factors that effect human performance are... - Answers fatigue, stress, monitoring, automation mode
awareness
