Department of Geography and Environmental Systems
UNIVERSITY OF MARYLAND BALTIMORE COUNTY
GES-311 Dr. Ali Tokay
Weather and Climate
A
Please use the answer sheet. Each has 2.5 points.
1) In the tropics, pressure rises and falls in ………. a day.
a) four times
b) once
c) twice
d) three times
2) Consider a planet where its atmosphere is 1023 kg in mass, and its radius is 106 km, the surface pressure will then be ……… millibars. (gravitational constant = 10 m sec-2)
a) 102/(4π)
b) 104/(4π)
c) 106/(4π)
d) 108/(4π)
3) A helicopter pad typically includes a ……..
b) wind sock
c) three-cup anemometer
d) skyvane
4) If the temperature is 27˚C, pressure is 1000 mb, the density is …………kg/m3. (Gas constant = 287 J/kgK)
b) 10/(3x287)
c) (3x287)/1000
d) (3x287)/10
5) Total totals index is a function of temperature at ……...
a) 850 mb and 500 mb
b) 850 mb and 700 mb
c) 500 mb and the surface
d) 700 mb and the surface
6) For a 3000 kilogram mass accelerating at 30 m sec-2. If the pressure is 1000 mb, the area is ……. centimeter square.
a) 9000
b) 900
c) 90
d) 9
7) For an inversion of 5 ˚C/km, the vertical temperature gradient is …….. ˚C at 100 m height interval.
a) – 5
b) – 0.5
c) 5
d) 0.5
8) The international standard atmosphere assumes that temperature decreases at a rate of ………. in the troposphere.
a) 10˚C/km
b) 6.5 ˚C/km
c) 2.5 ˚C.km
d) 1˚C/km
9) K-index does not include temperature at ……… mb.
b) 850
c) 700
d) 500
10) CAPE is not zero if …….. exists.
a) LCL
b) CCL
c) LFC
d) Lifted Index
11) Consider an air parcel travels 20 km where the change in air pressure is 40 mb, if the density of the atmosphere is 1 kg/m3, what is the pressure gradient force?
a) 0.02 Newton
b) 2 Newton
c) 0.2 Newton
d) 0.002 Newton
12) Centrifugal force is ………. directed and changes the ….. of the wind.
a) outward, speed
b) inward, direction
c) outward, direction
d) inward, speed
13) Gradient wind does not include …………
a) Coriolis force
b) gravitational force
c) centripetal force
d) pressure gradient force
14) …………. cloud is not associated with a mountain.
a) Rotor
b) Lee-wave
c) Billow
d) Banner
15) …….. is a dedicated instrument to measure the wind direction only.
a) Wind vane
b) Wind rose
c) Aerovane
d) Wind sock
16) If the sea level pressure is 1012 millibar, the station pressure at 300 m height is approximately ………. millibar.
a) 1002
b) 1042
c) 1022
d) 982
17) ……….. is responsible for the contrasting climate zones in Hawaiian islands.
a) solar heating
b) frontal lifting
c) orographic lifting
d) convergence on the ground
18) The volume of a 3 mm drop is …….… m3 (p = 3).
a) 9 x 10-3
b) 4.5 x 10-3
c) 9 x 10-9
d) 4.5 x 10-9
19) If the wind direction from ……, meridional wind is positive and zonal wind is positive.
a) 105 degree
b) 60 degree
c) 230 degree
d) 315 degree
20) If the wind is from south to north blowing at 8 knots, the zonal wind is ……… m/sec.
a) 0
b) 4
c) -4
d) -8
21) The virtual temperature is expressed as a function of……
a) relative humidity
b) mixing ratio
c) absolute humidity
d) specific humidity
22) If the atmosphere had a uniform density throughout and if the air temperature were equal to the average value at sea level, the top of the atmosphere would be …… km.
a) 5
b) 8
c) 10
d) 16
23) Heavy snow occurs when the visibility is less than ………….. mile.
a) 0.25
b) 0.5
c) 1
d) 0.75
24) Rain gauges collect rainfall at increments of …….. inches in the US.
a) 0.001
b) 0.01
c) 0.1
d) 1
25) is a weather symbol for …………
a) snow pellets
b) ice pellets
c) hail
d) snow grains
26) Baltimore receives …… inches of snow per year on average.
a) 10
b) 20
c) 30
d) 40
27) Baltimore receives ……. days of freezing rain per year on average.
a) 1
b) 4
c) 7
d) 10
28) ……… is also called as frozen drizzle.
a) Snow pellets
b) Ice pellets
c) Snow grains
d) Graupel
29) ………. is used in cloud seeding.
a) Hydrogen chloride
b) Silver iodide
c) Sulfur iodide
d) Magnesium chloride
30) Aneroid barometer is ….. accurate …….. portable than the mercury barometer.
a) more, and more
b) more, but less
c) less, but more
d) less, and less
31) ……….…… is associated with extreme weather events.
a) Ice pellets
b) Freezing rain
c) Snow grain
d) Snow pellets
32) ……… is used to measure the wind direction and wind speed in radiosondes.
a) Hotwire anemometer
b) Pilot balloon
c) Aerovane
d) Sonic anemometer
33) When the Beaufort scale is .........., it designates the gale conditions.
a) 4
b) 6
c) 8
d) 10
34) If the atmosphere is neutral for unsaturated air parcel and is unstable for saturated air parcel, the lapse-rate is …………………
a) -6 degree/km
b) -10 degree/km
c) -8 degree/km
d) -2 degree/km
35) If the wind is from south to north in the Northern Hemisphere, the Coriolis force deflects the wind toward ……………………
a) northwest
b) northeast
c) southeast
d) southwest
36) ………… has a manual rain gauge and measures precipitation once a day.
b) ASOS
c) AWOS
d) COOP
37) The deicing is advised in ……… icing conditions.
a) trace, light, moderate, heavy
b) light, moderate, heavy
c) moderate and heavy
d) heavy only
38) …………. is the only instrument that can measure the vertical wind speed.
a) Hotwire anemometer
b) Skywane
c) Three cup anemometer
d) Sonic anemometer
39) If a cloud consists of uniform droplets of 30,000 in cubic meter. What is the liquid water content when the mass of a single droplet is 2x10-3 kilogram.
a) 1.5 x 104 gram/m3
b) 1.5 x 107 gram/m3
c) 6.0 x 104 gram/m3
d) 6.0 x 107 gram/m3
40) If the stability of the atmosphere decreases, wind gust ….... and wind shear ……
a) increases, increases
b) increases, decreases
c) decreases, decreases
d) decreases, increases
Department of Geography and Environmental Systems
UNIVERSITY OF MARYLAND BALTIMORE COUNTY
GES-311 Dr. Ali Tokay
Weather and Climate
Name: ______________________________________
Please fill the blank. Each has 2.5 points.
41) ___________________ is the clouds aligned in rows due to strong vertical shear in horizontal wind speed and direction.
42) The air density at 16 km altitude is about ____________% of its value at sea-level.
43) Rain gauge is also called __________________________ .
44) Surface winds blow opposite to _____________ and perpendicular and to the left of the ________________ force.
45) __________________________ is the amount of energy that must be supplied to a parcel for it to raise the level to the LFC.
46) Baltimore has about _____________ thunderstorms days per year.
Please follow the Stuve diagram to response the following questions:
47) The maximum wind occurs at ______________ millibars.
48) Lifted Index is _______________ and is interpreted as _______________________.
49) LCL stands for ______________________________________ and is ________ mb.
50) CCL stands for ______________________________________ and is ________ mb.
51) LFC stands for ______________________________________ and is _______ mb.
52) EL stands for _____________________________________ and is _________ mb.