Weather “Tech-Notes” Review
Directions: Use the following sets of tech-notes and your Reference Tables to
answer the 40 multiple choice questions included. Place your answers on the
Scantron form provided to you.
Tech-notes: Atmospheric Temperature, Pressure and Density
Wind and Air Circulation
Atmospheric Moisture
1. Convergence is an example of…
(a) air coming together in a low pressure system
(b) air moving apart in a low pressure system
(c) air coming together in a high pressure system
(d) air moving apart in a high pressure system
2. A barometric pressure reading of 1004 mb is equivalent to
(a) 30.30 in of Hg
(b) 29.00 in of Hg
(c) 29.65 in of Hg
(d) 28.70 in of Hg
3. The amount of water vapor present in a specific volume of air is known as..
(a) humidity (b) relative humidity (c) absolute humidity (d) condensation
4. Generally speaking, weather patterns in the continental US move from the..
(a) NE to SW (b) W to S (c) SE to SW (d) SW to NE
5. An instrument used to measure atmospheric pressure is a…
(a) thermometer (b) barometer (c) psychrometer (d) anemometer
6. Which of the following is NOT a method by which water vapor enters the
atmosphere?
(a) condensation (b) sublimation (c) evaporation (d) transpiration
7. Atmospheric transparency can be altered by…
(a) the amount of rainfall
(b) dry-bulb temperature
(c) pollutant level in the atmosphere
(d) cloud height
8. Which temperature zone of the atmosphere is located at a height of 40 miles
above sea level?
(a) thermosphere (b) mesosphere (c) troposphere (d) stratosphere
9. What type of a pressure belt is located at 0˚?
(a) low pressure belt with winds converging
(b) high pressure belt with winds converging
(c) low pressure belt with winds diverging
(d) high pressure belt with winds diverging
10. A temperature of 55˚C is equivalent to…
(a) 80˚F (b) 130˚F (c) -40˚F (d) 120˚F
11. A station model at a location has a barometric pressure stated as 045. This
symbol is equivalent to…
(a) 904.5 mb (b) 4.5 mb (c) 1004.5 mb (d) 104.5 mb
12. Hot sand heating the air just above it is an example of which method of
heating the atmosphere?
(a) convection (b) radiation (c) conduction (d) friction
13. If the dry-bulb temperature is 6˚C and the wet-bulb temperature is 4˚C, what
is the dew point temperature?
(a) 2˚C (b) 1˚C (c) -1˚C (d) 0˚C
14. When isobars are close together on a weather map, this is an indication of…
(a) sunny skies (b) low winds (c) low dew point (d) high winds
15. Which of the following is NOT a method by which our atmosphere might be
heated?
(a) convection
(c) direct absorption of insolation
(b) reflection
(d) Coriolis Effect
16. If the dry-bulb temperature is 18˚C and the wet-bulb temperature is 10˚C,
what is the relative humidity of the area?
(a) 60% (b) 33% (c) 100% (d) 56%
17. What happens to the atmospheric pressure of a parcel of air as it rises in the
atmosphere?
(a) it increases (b) it decreases (c) it remains constant
18. A station model at a location has two whole feathers and one half feather
along the shaft . This is an indication that the wind speed is..
(a) 50 knots (b) 2.5 knots (c) 250 knots (d) 25 knots
19. As wind speed increases, the evaporation rate…
(a) increases (b) decreases (c) remains the same
20. A weather vane always points towards….
(a) Polaris
(c) the area where the wind is coming from
(b) the Equator
(d) the direction the wind is blowing
21. Which substance in the atmosphere would absorb long wave, terrestrial
radiation?
(a) ice crystals (b) water vapor (c) volcanic ash (d) pollen
22. As the amount of water vapor in the atmosphere increases, the air pressure…
(a) increases (b) decreases (c) remains the same
23. Which interface in the atmosphere is located 80 km above sea level?
(a) thermopause (b) stratopause (c) mesopause (d) tropopause
24. Due to the Coriolis Effect, planetary winds are deflected…
(a) to the left in the Northern Hemisphere
(b) to the right in the Southern Hemisphere
(c) to the right In the Northern Hemisphere
(d) no deflection is apparent
25. The position of Earth’s pressure belts and origin of planetary winds will
change throughout the year due to the…
(a) Coriolis Effect
(c) Moon’s revolution around the Earth
(b) Earth’s tilted axis
(d) Earth’s revolution around the Sun
26. The falling of liquid or solid water to the Earth from the atmosphere due to
gravity is known as…
(a) sublimation (b) condensation (c) precipitation (d) solidification
27. When the air temperature falls below the dew point temperature,…
(a) condensation may occur and a cloud will form
(b) there will be an increase in atmospheric transparency
(c) high winds will be created
(d) a high pressure system will develop
28. Subtropical jet streams are located at…
(a) 0˚ (b) 60˚ N and S (c) 30˚ N and S (d) 90˚N and S
29. According to the weather station model what does the following symbol
mean:
+12/
(a) a steady drop in air pressure by 1.2 mb over the past three hours
(b) a steady rise in air pressure by 1.2 mb over the past three hours
(c) a steady drop in air pressure by 12 mb over the past three hours
(d) a steady rise in air pressure by 12 mb over the past three hours
30. The temperature at which air is filled with water vapor is known as…
(a) dry-bulb (b) wet-bulb (c) dew point (d) Kelvin
31. An instrument used to measure relative humidity is known as a…
(a) thermometer (b) anemometer (c) barometer (d) sling psychrometer
32. As the surface area of water increases, the evaporation rate…
(a) increases (b) decreases (c) remains constant
33. Wind moves from areas of high pressure to areas of..
(a) high pressure (b) low pressure (c) no pressure (d) no change
34. A strong, easterly flowing wind found in the upper troposphere is known as
(a) planetary wind (b) prevailing wind (c) jet stream (d) gale
35. Water freezes at…
(a) 20˚C (b) 0˚F (c) 273 ˚K (d) 68˚F
36. According to a barometer, 29 in of Hg is equivalent to …
(a) 988 mb (b) 982 mb (c) 1011 mb (d) 1004 mb
37. If the dry-bulb temperature is 26˚C and the wet-bulb temperature is 34˚C,
what would the relative humidity of the area be?
(a) 57%
(b) 55%
(c) 47% (d) 45%
38. As air temperature increases, air pressure…
(a) increases (b) decreases (c) remains the same
39. Regions where air spreads away from vertical currents is known as…
(a) divergence (b) convergence (c) dynamic equilibrium (d) sublimation
40. An example of sublimation would be…
(a) ice from a mountain top turning into water vapor
(b) water droplets escaping from a lake into the troposphere
(c) water droplets forming on a cold surface
(d) water vapor solidifying into ice crystals