Exam Questions and CORRECT Answers
Interfacility Transport - CORRECT ANSWER - Careful patient stabilization following
ABCs.
Looking for in scene approach - CORRECT ANSWER - Smoke, trees, MOI, traffic in
area.
Troposphere - CORRECT ANSWER - - first layer
- upper layer of this zone is a constant -56.5 degrees
- water vapour reduces with ascent
- 78% nitrogen, 21% oxygen, 1% trace
- 0-10,000ft
Stratosphere - CORRECT ANSWER - - from 17km to 50km
- lower levels experience some weather
- contains ozone layer
- absorbs ultraviolet radiation of the sun
- temperature is constant -56
- almost no water vapour present
- about 24% of the total atmospheric molecular mass
Mesophere - CORRECT ANSWER - - from 50-80km
- temperature reaches its coldest at -90
- meteors generally burn up here
Thermosphere - CORRECT ANSWER - - 85-700km
,- 2000 degrees from solar radiation
Exosphere - CORRECT ANSWER - - final layer
-transitions into space
Atmospheric Pressure - CORRECT ANSWER - 760mmHg at a temperature of 15 degrees
in dry air at sea level.
Greatest Density Change - CORRECT ANSWER - Between sea level and 5000ft above
sea level.
Efficient Zone - CORRECT ANSWER - - sea level to 10,000 ft
- physiological environment
- barometric pressure drops from 760mmHg to 523mmHg at 10,000ft
Deficient Zone - CORRECT ANSWER - - from 10,000ft to 50,000ft
- requires supplemental oxygen or cabin pressurized systems
- barometric pressure approx. 87mmHg
- human body cannot survive unless in pressurized environment
Space Equivalent Zone - CORRECT ANSWER - - 50,000ft and continuing to outer
fringes of atmosphere
- totally hostile to human life
- requires pressurized aircraft
- boiling point of water drops to body temperature
- unsurvivable
, Aircraft Pressurization - CORRECT ANSWER - Engines introduce ambient air into a
compressor. The compressed air heats up and must be cooled before being introduced into the
cabin.
Pressurized Aircraft - CORRECT ANSWER - - expensive to build
- longer runways required
- complex maintenance
- higher altitudes
- fly above weather
- faster speeds
- generally longer range
- less turbulence
- less oxygen required
- stable cabin temperature
Unpressurized Aircraft - CORRECT ANSWER - - lower cost to manufacture
- short and unimproved runways may be an option
- altitudes restricted to physiologic zone
- slower speed
- shorter range
- exposed to turbulence
- require supplemental oxygen at higher altitudes
- less protection from extreme heat or cold
- increased cabin noise
Boyles Law - CORRECT ANSWER - The pressure and volume of a gas have an inverse
relationship, when temperature is held constant. If volume increases, then pressure decreases and
vice versa.