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USCG Auxiliary AUXWEA EDxam 2025
Entry
1-1 On a weather map, cold fronts are ind icated
by ________ symbols and warm fronts by
_______ symbols. - ✅a. dark, light
b. triangle, semicircle [2]
c. circle, triangle
d. semicircle, triangle
1-2 To represent a warm or cold front on a
weather map, the appropriate symbol is drawn on
the side toward which - ✅a. the wind is blowing
b. the center of low pressure is located
c. the front is moving [2]
d. the air is colder
1-3 If triangles and semicircles are shown on opposite
sides of the same frontal boundary, the
front is - ✅a. cold
b. occluded
c. stationary [2]
d. warm
1-4 Near a cold front, ______ air is advancing
and replacing the ______ air on the other side. - ✅a. cold, warm [2]
b. cloudy, clear
c. moist, dry
d. windy, calm
1-5 The approach of deteriorating weather is indicated
by a - ✅a. falling hygrometer
b. rising barometer
c. falling barometer [3]
d. falling speedometer
1-6 For best results, an outdoor thermometer
should be - ✅a. bought from a hardware store
b. mounted in a shady spot [3]
c. filled with colored water
d. read on cloudy days
1-7 Humidity is measured by an instrument
called a/an - ✅a. atomizer
b. humidifier
c. hygrometer [4]
d. moisturizer
1-8 The amount of moisture actually in the air, as
a _______ of what the air could contain, is called
the _______ humidity. - ✅a. ratio, measured
b. percentage, relative [4]
c. fraction, atmospheric
d. percentage, partial
1-9 The maximum amount of moisture air can
contain _______ as the air temperature ______. - ✅a. decreases, decreases [4]
b. increases, decreases
c. decreases, increases
d. stays the same, increases
c. stratus, cumulus [5]
d. stratus, cirrus
1-15 Clouds are divided into ______ , ______ ,
and ______ families according to the heights of
their bases. - ✅a. high, middle, low [5]
b. low, high, extensive vertical development
c. stratus, cumulus, cirrus
d. high, low, surface
1-16 Clouds of extensive vertical development
include - ✅a. stratocumulus and cumulonimbus
b. towering cumulus and nimbostratus
c. towering cumulus and cumulonimbus [6]
d. nimbostratus and cumulonimbus
1-17 The prefix "nimbo" or suffix "nimbus" is
attached to a cloud form when it is - ✅a. dissipating
b. lowering
c. raining [6]
d. thickening
1-18 An approaching cold front would be ind icated by ______ , ______, and ______ clouds. - ✅a. cirrus, cirrocumulus, altocumulus [6]
b. cirrus, cirrostratus, altostratus
c. cirrus, cirrocumulus, nimbostratus
d. altocumulus, cirrocumulus, cirrus
1-19 An approaching warm front would be ind icated by ______ , ______, and ______ clouds. - ✅a. cirrus, cirrocumulus, altocumulus
b. cirrus, cirrostratus, altostratus [6]
c. cirrus, cirrocumulus, nimbostratus
d. altocumulus, cirrocumulus, cirrus
1-20 With your arm stretched out and your bottom
finger on the horizon, you observe that the
cloud base loses detail at a point on a sight line
that is half your hand high. You estimate the
height of the cloud base to be ______ feet. - ✅a. 2,500 [6, 7]
b. 5,
c. 10,
d. 25,
2-1 The most important cause of weather is - ✅a. gravity
b. latent heat of condensation
c. uneven solar heating [11]
d. regions of high and low pressure
2-2 Winds generally blow - ✅a. during daytime
b. toward areas of low pressure [11]
c. toward areas of high pressure
d. toward areas of low density
2-3 Half the water vapor in the atmosphere is
found - ✅a. above the dew point
b. below the troposphere
c. below the tropopause
d. below 6500 feet above sea level [12]
2-4 The proportions of dry constituents in the
atmosphere - ✅a. are always the same [12]
d. absolute temperature and humidity
2-10 Which is heavier, a pound of air or a pound
of iron? - ✅a. The air
b. The iron
c. Neither, they have the same density
d. Neither, but the iron is more dense [13]
2-11 An Auxiliarist weighing 150 pounds stands
on a scale with an area of half a square foot. A
weight of 300 pounds sits on a piece of plywood
with an area of one square foot. - ✅a. The pressure on the scale is less than the
pressure on the plywood.
b. The pressure on the scale is the same as
the pressure on the plywood. [14]
c. The pressure on the scale is more than the
pressure on the plywood.
d. There is more weight on the scale.
2-12 When air is free to expand, its temperature
may be changed by - ✅a. changing its volume
b. adding heat energy
c. removing heat energy
d. all of the above [14, 15]
2-13 If the volume of some air increases by ten
percent, but the temperature of the air remains
constant, the air pressure will - ✅a. decrease by ten percent [15]
b. increase by ten percent
c. not change
d. be proportional to the volume
2-14 Standard atmospheric temperature and pressure
at sea level are - ✅a. 59 oF and 29.92 inches of mercury
b. 15 oC and 29.92 millibars
c. 15oC and 1013.2 millibars
d. either a. or c. [16]
2-15 Standard values of atmospheric temperature,
pressure, and density - ✅a. are world wide averages
b. are different at different altitudes
c. both of the above [16]
d. none of the above
2-16 Almost all of the earth's weather occurs - ✅a. in the tropopause
b. in the troposphere [16]
c. below an altitude of 6500 feet
d. above the tropopause
2-17 The height of the tropopause is generally
between ______ feet above sea level - ✅a. 6500 and 30000
b. 25000 and 30000
c. 6500 and 65000
d. 25000 and 65000 [16, 17]
2-18 A hot air balloon tends to rise because - ✅a. the air in the balloon is less
dense than the surrounding
air outside the balloon [17]
b. the pressure in the balloon is greater than
the pressure outside the balloon
c. the air in the balloon is warmer than the
dew point, then - ✅a. condensation or deposition will occur
until the dew point equals the lower
temperature [19]
b. moisture will evaporate
c. the saturation will be reduced
d. none of the above
2-24 The air in the atmosphere absorbs heat
when water changes state in which of the following
processes? - ✅a. Condensation and evaporation
b. Deposition and sublimation
c. Freezing and condensation [20]
d. Melting and freezing
2-25 The best measurement for predicting the
likelihood of rain is the - ✅a. air temperature
b. dew point [20]
c. relative humidity
d. absolute humidity
3-1 A convection current transports _____ by
means of ________. - ✅a. temperature, heat exchange
b. heat, conduction
c. heat, material exchange [25]
d. radiation, transfer
3-2 Warm, dry air rising into colder air transports
_________ heat. - ✅a. latent
b. molecular
c. sensible [25]
d. sensitive
3-3 Rising moist air transports both sensible and
_______ heat. - ✅a. advective
b. infrared
c. latent [25]
d. vaporous
3-4 A wind blowing warm air from the south toward
colder air to the north is transporting heat by
means of - ✅a. advection [25, 26]
b. conduction
c. convection
d. radiation
3-5 When sunshine strikes the earth's surface, a
layer of soil below the surface is warmed by - ✅a. advection
b. conduction [26]
c. convection
d. radiation
3-6 At night, the temperature of a soil layer will
decrease faster than the temperature of an ocean
water layer because - ✅a. there is no solar radiation at night
b. the surfaces emit infrared to the atmosphere
c. the soil heat capacity is greater
d. the soil heat capacity is lower [26]
3-7 Warm land and water surfaces radiate heat to
the atmosphere at ______ wavelengths. - ✅a. infrared [26]
the night. - ✅a. absorbs, advects
b. gains, loses [28]
c. absorbs, emits
d. gains, reflects
3-13 The earth's surface temperature is generally coldest - ✅a. just after sundown
b. at midnight
c. just before dawn
d. just after dawn [28]
3-14 The earth emits infrared radiation - ✅a. all the time [29]
b. only at night
c. only during the day
d. only from the tropics
3-15 Atmospheric convection not associated with
frontal activity is generally strongest - ✅a. just after dawn
b. in the morning
c. in the afternoon [29]
d. just before sunset
3-16 Seasonal variation of solar heating is caused
by the earth's ______ and ______. - ✅a. atmosphere, axial tilt
b. axial tilt, orbit around the sun [29]
c. orbit, latitude
d. axial tilt, latitude
3-17 Latitude variation of solar heating is a result
of differences in ______ and ______. - ✅a. the earth's axial tilt, the earth's orbit
b. axial tilt, sun angle
c. sun angle, distance rays must travel
through the atmosphere [29, 30]
d. the earth's orbit, distance rays must travel
through the atmosphere
3-18 Blustery winter weather is a result of - ✅a. seasonal variation causing strong advection
b. large latitude variation of
solar heating [30]
c. distance the sun's rays must travel through
the atmosphere
d. low sun angle
3-19 Atmospheric water vapor will condense - ✅a. as soon as the air cools to its dew point
b. between the dew point and 0oC [30]
c. below 0oC
d. below 0oF
3-20 Ice crystals may form when moist air - ✅a. cools to below the freezing point [30, 31]
b. cools to its dew point
c. becomes saturated
d. encounters clouds
3-21 ______ is especially dangerous if encountered by vessels or aircraft. - ✅a. snow
b. sleet
c. ice pellets
d. freezing rain [31]
4-1 ______ are the atmosphere's way of trying to smooth out the uneven distribution of solar heating on the global scale. - ✅a. Convergence and divergence
b. Gravity and friction
c. Prevailing winds [35]
c. northerly [37]
b. westerly
4-7 ______ force refers to the force exerted by a
body moving in a circle and is directed ______
from the ______. - ✅a. Centrifugal, inward, body
b. Pressure gradient, outward, center
c. Gravity, inward, earth
d. Centrifugal, outward,
axis of rotation [37, 38]
4-8 ______ winds follow a curved track to the
south in the northern hemisphere due to ______.
a. Easterly, decreased centrifugal force
b. Westerly, increased gravitational force
c. Westerly, increased centrifugal force [38]
d. Westerly, increased pressure gradient - ✅a. Easterly, decreased centrifugal force
b. Westerly, increased gravitational force
c. Westerly, increased centrifugal force [38]
d. Westerly, increased pressure gradient
4-9 The Coriolis effect is strongest at ______ and disappears at ______. - ✅a. the equator, the poles
b. the poles, the equator [37, 38]
c. mid- latitudes, the equator
d. mid- latitudes, the poles
4-10 The ______ and the ______ are semipermanent pressure belt features that have a significant
effect on continental US weather. - ✅a. Aleutian low, Bermuda triangle
b. ITCZ, trade winds
c. Pacific high, Bermuda high [39]
d. Aleutian low, Icelandic low
4-11 The ______ and the ______ are separated
by a belt of light and variable winds called the
______. - ✅a. trade winds, westerlies,
horse latitudes [40]
b. trade winds, westerlies, doldrums
c. trade winds, westerlies, ITCZ
d. NE, SE trade winds, horse latitudes
4-12 The subtropical and polar jet streams are
high-speed "rivers" of air found near - ✅a. latitudes 60S and 60N
b. 30 S and 30 N
c. latitudes 30 and 60 [40]
d. the doldrums and the horse latitudes
4-13 As a general rule, air moving into an area of low pressure tends to ______ , and air moving
into an area of high pressure tends to ______. - ✅a. rise, descend [41]
b. slow down, speed up
c. descend, rise
d. speed up, slow down
4-14 The force of friction on a westerly jet
stream is directed toward the - ✅a. north
b. east
c. south
d. west [42]
4-15 The force of friction on winds in the atmosphere becomes negligible in comparison with
other forces - ✅a. at the surface
warmer regions and/or vice versa when Rossby
waves have large - ✅a. amplitudes [44]
b. numbers
c. pressures
d. wavelengths
5-1 Besides the global and micro scales, meteorologists classify weather patterns of different
sizes as - ✅a. large and small
b. synergistic and mesoscale
c. synoptic and mesoscale [49]
d. mesoscale and molecular scale
5-2 Synoptic scale features include - ✅a. air masses and circulation
around highs [49]
b. fronts and trade winds
c. land and sea breezes
d. mesoscale and microscale phenomena
5-3 An air mass is a pool of air with ______
properties over a wide ______. - ✅a. nearly chaotic, geographic area
b. almost uniform, geographic area [49]
c. nearly uniform, altitude range
d. the same, range of moisture content
5-4 An air mass takes on its properties from the
underlying surface, which is called a - ✅a. continent
b. ocean
c. pool region
d. source region [49, 50]
5-5 The two main characteristics used to classify
an air mass are - ✅a. continental and maritime
b. moisture content and temperature [50]
c. polar and tropical
d. pressure and temperature
5-6 Air masses generally form in ______ and
migrate with ______. - ✅a. highs, lows [50]
b. lows, highs
c. pools, highs
d. source regions, highs
5-7 ______ is likely to occur when an air mass
moves over a large body of warm water. - ✅a. Addition of moisture [50]
b. Cooling from below
c. Orographic lift
d. Removal of moisture
5-8 An air mass may become saturated, forming
clouds or fog, when - ✅a. it moves over a colder surface
b. moisture is added
c. both of the above [50]
d. none of the above
5-9 Orographic lift promotes the ______ an air
mass. - ✅a. addition of heat to
b. addition of moisture to
c. formation of
d. removal of moisture from [51]
