SAMPLE TEST QUESTIONS SURVEY OF METEOROLOGY CH 4
1. If a glass of water were surrounded by saturated air:
a. the level of the water in the glass would slowly decrease
b. the water's temperature would slowly increase
c. the level of the water in the glass would not change
d. the water's temperature would slowly decrease
2. As the air temperature increases, the air's capacity for water vapor:
a. increases
b. decreases
c. remains constant
d. is unrelated to air temperature and can either increase or decrease
3. Transpiration is:
a. evaporation of salt water in the earth's oceans
b. absorption of water in the soil by a plant's root
c. the slow movement of water through porous soil
d. release of moisture by plants into the atmosphere
4. Which of the following will decrease in a rising parcel of air?
a. relative humidity
b. absolute humidity
c. specific humidity
d. all of the above
5. If water vapor comprises 3.5% of an air parcel whose total pressure is 1000 mb, the water vapor pressure would be:
a. 1035 mb
b. 35 mb
c. 350 mb
d. 965 mb
6. A high water vapor pressure indicates:
a. a relatively large number of water vapor molecules in the air
b. a relatively small number of water vapor molecules in the air
c. a relatively high rate of evaporation
d. an abundant supply of condensation nuclei in the air
7. If very cold air is brought indoors and warmed with no change in its moisture content, the saturation vapor pressure of this air will _____ and the relative humidity of this air will _____.
a. increase, increase
b. decrease, decrease
c. increase, decrease
d. decrease, increase
Refer to the temperature and dew point data in the following cities to answer questions 8, 9, and 10:
City Air Temperature (°F) Dew Point (°F)
City A 95 76
City B 10 10
City C 30 21
City D 50 42
8. Which city has the highest relative humidity?
a. City A
b. City B
c. City C
d. City D
9. Which city has the least amount of water vapor in the air?
a. City A
b. City B
c. City C
d. City D
10. Which city has the highest saturation vapor pressure?
a. City A
b. City B
c. City C
d. City D
11. The main reason why vegetables take longer to cook in boiling water at high altitudes is because:
a. water boils at a higher temperature with higher altitude
b. the temperature of the boiling water decreases with increasing altitude
c. there is less oxygen in the air at high altitude
d. saturation vapor pressure decreases with increasing altitude
12. Suppose it is snowing outside and the air is saturated. The air temperature and dew point are both 15°F, and the actual vapor pressure is 3 mb. If this air is brought indoors and warmed to 75°F, what would the relative humidity of this air be, assuming that its moisture content does not change? (The saturation vapor pressure at 75°F is 30 mb).
a. 5 percent
b. 10 percent
c. 30 percent
d. 50 percent
e. 100 percent
13. If the air temperature in a room is 70°F, the saturation vapor pressure is 25 mb, the dew point temperature is 45°F, and the actual vapor pressure is 10 mb, then the relative humidity must be near _____ percent.
a. 15
b. 20
c. 35
d. 40
14. As the difference between the air temperature and the dew point increases, the relative humidity:
a. increases
b. decreases
c. remains constant at a value less than 100%
d. remains constant and equal to 100%
15. In a blinding snowstorm in Vermont the air temperature and dew-point temperature are both 30°F. Meanwhile, under clear skies in Arizona, the air temperature is 85°F and the dew point temperature is 38°F. From this information you could conclude:
a. there is more water vapor in the air in Arizona
b. there is more water vapor in the Vermont snowstorm
c. the same amount of water vapor is found in the air in Vermont and Arizona
d. Vermont and Arizona are both located next to the ocean
16. This instrument uses wet-bulb and dry-bulb temperature to obtain relative humidity:
a. infrared hygrometer
b. sling psychrometer
c. hair hygrometer
d. electrical hygrometer