S-290 COMPREHENSIVE EXAMS ACTUAL
QUESTIONS AND ANSWERS SURE A+
✔✔fire environment that cause the most rapid changes in the rate of spread - ✔✔fuel
type
wind
steepness of the slope
✔✔Convection from a fire can - ✔✔create cumulus clouds
change wind direction
affects stability
✔✔which substance has the highest specific heat capacity - ✔✔water
✔✔humid climates usually have higher temperatures during the night than do dry
climates? - ✔✔True
✔✔all weather occurs in the - ✔✔troposphere
✔✔water vapor is the greatest in? - ✔✔the topics
✔✔six whether variation that can be measured - ✔✔air pressure
air température
,RH
wind
clouds
visibility
precipitation
✔✔what processes cool daytime temperatures - ✔✔evaportion
light colored surfaces
high transparency
clouds
✔✔does condensation reduce daytime temperature - ✔✔no
✔✔what substance has the highest heat capacity - ✔✔water
✔✔the largest % of solar radiation from the sun is absorbed by - ✔✔the earths surface
✔✔are night temperatures warmer under timbers than a clearing ? - ✔✔true
✔✔what traps long wave radiation - ✔✔glass and green house gasses
✔✔what surface properties increase surface temperatures - ✔✔rough textures dark
surfaces
✔✔define Relative Humidity - ✔✔is the ratio of the amount of moisture in the air, to the
maximum amount of moisture that air could contain if it were saturated
✔✔define wet bulb is - ✔✔the lowest temperature to which air can be cooled by
evaporation
✔✔Dewpoint is - ✔✔the temperature to which air must be cooled to reach saturation
✔✔Temperature is - ✔✔the degree of hotness or coldness of a substance
✔✔south facing slopes are typically - ✔✔warmer and drier than north facing slopes
✔✔cloud cover at night - ✔✔keeps surface temperatures warmer than would otherwise
be expected
✔✔stronger winds at night will - ✔✔keep temperature warmer and relative humidity low
✔✔a maritime polar air mass originates over - ✔✔cold oceanic regions such as the
north pacific, the gulf of alaska, and the north atlantic
, ✔✔continental tropical air mass originates over - ✔✔large, often warm and dry
continental land areas, such as central america or southwest united states
✔✔the coolest temperatures usually occur around sunrise - ✔✔true
✔✔humidity double when - ✔✔with each 20 decrease in temperature
✔✔humidity does what with a 20 degree increase in temperature - ✔✔halves
✔✔the highest relative humidity occurs with the highest temperature - ✔✔false
✔✔relative humidity is lower on north aspects - ✔✔false
✔✔does vegetation have an affect on temperature and humidity - ✔✔yes
✔✔Relative humidity measures the amount of moisture in the air ? - ✔✔no it measure
how much the air can hold
✔✔Dew point is - ✔✔a good indicator of moisture in the air
changes little during the day if air mass is constant
✔✔are temps high on step slopes vs flat areas ? - ✔✔no flat areas are hotter than
slopes
✔✔two things that can change relative humidity - ✔✔temperature and change in dew
point
✔✔dew point is - ✔✔identical to the wet bulb temperature when the air is saturated
the same as wet bulb temperature
✔✔Rising air parcels will always - ✔✔expand and cool
✔✔sinking air parcels will always - ✔✔compress and warm
✔✔as air pressure decreases - ✔✔its volume will increase
its density will decrease
its temperature will decrease
✔✔as air pressure increases - ✔✔its volume will decrease
it density will increase
and it temperature will increase
✔✔water vapor is a - ✔✔variable gas
QUESTIONS AND ANSWERS SURE A+
✔✔fire environment that cause the most rapid changes in the rate of spread - ✔✔fuel
type
wind
steepness of the slope
✔✔Convection from a fire can - ✔✔create cumulus clouds
change wind direction
affects stability
✔✔which substance has the highest specific heat capacity - ✔✔water
✔✔humid climates usually have higher temperatures during the night than do dry
climates? - ✔✔True
✔✔all weather occurs in the - ✔✔troposphere
✔✔water vapor is the greatest in? - ✔✔the topics
✔✔six whether variation that can be measured - ✔✔air pressure
air température
,RH
wind
clouds
visibility
precipitation
✔✔what processes cool daytime temperatures - ✔✔evaportion
light colored surfaces
high transparency
clouds
✔✔does condensation reduce daytime temperature - ✔✔no
✔✔what substance has the highest heat capacity - ✔✔water
✔✔the largest % of solar radiation from the sun is absorbed by - ✔✔the earths surface
✔✔are night temperatures warmer under timbers than a clearing ? - ✔✔true
✔✔what traps long wave radiation - ✔✔glass and green house gasses
✔✔what surface properties increase surface temperatures - ✔✔rough textures dark
surfaces
✔✔define Relative Humidity - ✔✔is the ratio of the amount of moisture in the air, to the
maximum amount of moisture that air could contain if it were saturated
✔✔define wet bulb is - ✔✔the lowest temperature to which air can be cooled by
evaporation
✔✔Dewpoint is - ✔✔the temperature to which air must be cooled to reach saturation
✔✔Temperature is - ✔✔the degree of hotness or coldness of a substance
✔✔south facing slopes are typically - ✔✔warmer and drier than north facing slopes
✔✔cloud cover at night - ✔✔keeps surface temperatures warmer than would otherwise
be expected
✔✔stronger winds at night will - ✔✔keep temperature warmer and relative humidity low
✔✔a maritime polar air mass originates over - ✔✔cold oceanic regions such as the
north pacific, the gulf of alaska, and the north atlantic
, ✔✔continental tropical air mass originates over - ✔✔large, often warm and dry
continental land areas, such as central america or southwest united states
✔✔the coolest temperatures usually occur around sunrise - ✔✔true
✔✔humidity double when - ✔✔with each 20 decrease in temperature
✔✔humidity does what with a 20 degree increase in temperature - ✔✔halves
✔✔the highest relative humidity occurs with the highest temperature - ✔✔false
✔✔relative humidity is lower on north aspects - ✔✔false
✔✔does vegetation have an affect on temperature and humidity - ✔✔yes
✔✔Relative humidity measures the amount of moisture in the air ? - ✔✔no it measure
how much the air can hold
✔✔Dew point is - ✔✔a good indicator of moisture in the air
changes little during the day if air mass is constant
✔✔are temps high on step slopes vs flat areas ? - ✔✔no flat areas are hotter than
slopes
✔✔two things that can change relative humidity - ✔✔temperature and change in dew
point
✔✔dew point is - ✔✔identical to the wet bulb temperature when the air is saturated
the same as wet bulb temperature
✔✔Rising air parcels will always - ✔✔expand and cool
✔✔sinking air parcels will always - ✔✔compress and warm
✔✔as air pressure decreases - ✔✔its volume will increase
its density will decrease
its temperature will decrease
✔✔as air pressure increases - ✔✔its volume will decrease
it density will increase
and it temperature will increase
✔✔water vapor is a - ✔✔variable gas
