Avit 309 Test 1 UPDATED ACTUAL Exam
Questions and CORRECT Answers
What is the largest cause of fatalities in commercial aviation? - CORRECT ANSWER - an
inappropriate response response leading to loss of control in flight
Where is the physiological defiant zone? - CORRECT ANSWER - above 10,000ft
How long does it take a person to acclimate to a location at a higher altitude? - CORRECT
ANSWER - 18 days per mile
Where is the greatest change in pressure in our atmosphere? - CORRECT ANSWER -
surface to 10,000ft
Boyle's Law - CORRECT ANSWER - Pressure and volume of a certain amount of gas are
constant (explains trapped gas)
Charles Law - CORRECT ANSWER - 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 - CORRECT ANSWER - 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 - CORRECT ANSWER - Each component of all gas contributes to the total
pressure (explains hypoxia)
,Law of Gaseous Diffusion - CORRECT ANSWER - 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 - CORRECT ANSWER -
Ventilation, Diffusion, Oxygen Transport, Utilization
What is homeostasis? - CORRECT ANSWER - the condition compatible with optimum
cellular & bodily function
What in the Red Blood Cell enables it to carry oxygen? - CORRECT ANSWER -
hemoglobin
What factors determine the PAO2? - CORRECT ANSWER - O2, pressure gradient, CO2,
water vapor,
What is the main factor determining amount of O2 absorbed in lungs - CORRECT
ANSWER - Partial pressure gradient
What are common symptoms of trapped gas problems? - CORRECT ANSWER - pain
What are common symptoms of decompression sickness? - CORRECT ANSWER -
nitrogen bubbles trying to escape from a persons body
What is the recommended treatment of hypoxic hypoxia at altitude? - CORRECT
ANSWER - -100% oxygen with pressure
What is the lower limit of the zone of physiologic deficiency? - CORRECT ANSWER -
95%- 85%
, In which of the 10,000 foot intervals is the barometric pressure change the greatest? - CORRECT
ANSWER - sea level - 10000 ft
Define the zone of physiologic deficiency? - CORRECT ANSWER - unable to function
without some type of life support
What is effective performance time? - CORRECT ANSWER - 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? - CORRECT
ANSWER - carbon monoxide
Which toxin causes histotoxic hypoxia? - CORRECT ANSWER - carbon monoxide,
cyanide, narcotics, alcohol
Which gas level in a person's blood will change the most as a result from hyperventilating? -
CORRECT ANSWER - carbon dioxide
Which law describes how nitrogen in your body tissues will come out of solution (in the form of
bubbles) with decreasing pressure? - CORRECT ANSWER - henry's law
Which oxygen delivery system will best protect the user in a toxic exposure emergency? -
CORRECT ANSWER - pressure and diluted demand regulator
What causes an aircraft cabin flashover? - CORRECT ANSWER - 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? - CORRECT ANSWER - aerosolized gases, burn hydraulic fluid oil, CO, cyanide
Questions and CORRECT Answers
What is the largest cause of fatalities in commercial aviation? - CORRECT ANSWER - an
inappropriate response response leading to loss of control in flight
Where is the physiological defiant zone? - CORRECT ANSWER - above 10,000ft
How long does it take a person to acclimate to a location at a higher altitude? - CORRECT
ANSWER - 18 days per mile
Where is the greatest change in pressure in our atmosphere? - CORRECT ANSWER -
surface to 10,000ft
Boyle's Law - CORRECT ANSWER - Pressure and volume of a certain amount of gas are
constant (explains trapped gas)
Charles Law - CORRECT ANSWER - 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 - CORRECT ANSWER - 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 - CORRECT ANSWER - Each component of all gas contributes to the total
pressure (explains hypoxia)
,Law of Gaseous Diffusion - CORRECT ANSWER - 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 - CORRECT ANSWER -
Ventilation, Diffusion, Oxygen Transport, Utilization
What is homeostasis? - CORRECT ANSWER - the condition compatible with optimum
cellular & bodily function
What in the Red Blood Cell enables it to carry oxygen? - CORRECT ANSWER -
hemoglobin
What factors determine the PAO2? - CORRECT ANSWER - O2, pressure gradient, CO2,
water vapor,
What is the main factor determining amount of O2 absorbed in lungs - CORRECT
ANSWER - Partial pressure gradient
What are common symptoms of trapped gas problems? - CORRECT ANSWER - pain
What are common symptoms of decompression sickness? - CORRECT ANSWER -
nitrogen bubbles trying to escape from a persons body
What is the recommended treatment of hypoxic hypoxia at altitude? - CORRECT
ANSWER - -100% oxygen with pressure
What is the lower limit of the zone of physiologic deficiency? - CORRECT ANSWER -
95%- 85%
, In which of the 10,000 foot intervals is the barometric pressure change the greatest? - CORRECT
ANSWER - sea level - 10000 ft
Define the zone of physiologic deficiency? - CORRECT ANSWER - unable to function
without some type of life support
What is effective performance time? - CORRECT ANSWER - 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? - CORRECT
ANSWER - carbon monoxide
Which toxin causes histotoxic hypoxia? - CORRECT ANSWER - carbon monoxide,
cyanide, narcotics, alcohol
Which gas level in a person's blood will change the most as a result from hyperventilating? -
CORRECT ANSWER - carbon dioxide
Which law describes how nitrogen in your body tissues will come out of solution (in the form of
bubbles) with decreasing pressure? - CORRECT ANSWER - henry's law
Which oxygen delivery system will best protect the user in a toxic exposure emergency? -
CORRECT ANSWER - pressure and diluted demand regulator
What causes an aircraft cabin flashover? - CORRECT ANSWER - 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? - CORRECT ANSWER - aerosolized gases, burn hydraulic fluid oil, CO, cyanide
