Exam Questions and CORRECT Answers
Dalton's law applies to mainly:
A) pressure
B) volume
C) temperature
D) mass - CORRECT ANSWER - A) pressure
Dalton's law states "the total pressure of a mixture of gases equal..."
A) inverse proportional to volume
B) nearly proportional to its absolute temperature
C) inversely proportional to the absolute mass
D) the sum of the partial pressures exerted by the individual gases in the mixture - CORRECT
ANSWER -D
The largest percentage of the dry atmospheric composition is:
A) oxygen
B) carbon dioxide
C) nitrogen
D) hydrogen - CORRECT ANSWER - C) nitrogen
To calculate the partial pressure of a gas rate at a certain altitude, the following points must be
known:
A) barometric pressure and temperature
B) barometric pressure and rate of ascent
C) temperature and gas concentration
D) gas concentration and barometric pressure - CORRECT ANSWER - D) gas
concentration and barometric pressure
, According to Dalton's law, hypoxia results at high altitudes because:
A) decreased temperature make oxygen less available
B) as barometric pressure decreases, oxygen concentration decreases.
C) while oxygen concentration remains unchanged, decreased partial pressure makes is less
available.
D) barometric pressure increases therefore oxygen is also at a higher pressure. - CORRECT
ANSWER - C) while oxygen concentration remains unchanged, decreased partial pressure
makes is less available.
The time of useful consciousness (TUC) is (shorter/longer) at higher altitudes. - CORRECT
ANSWER - Shorter
The average time of useful consciousness for depressurization at 25,000ft is:
A) 30-60 seconds
B) 90 seconds
C) 3-5 minutes
D) 30 minutes - CORRECT ANSWER - C) 3-5 minutes
Which of the following factors contribute to hypoxia in the air medical crew:
1) eating gas forming food
2) length of time at altitude
3) general health status/level of fitness
4) noise intensity >100 db
A) 1,2,3
B) 2,3
C) 2,4
D) all of the above - CORRECT ANSWER -D