Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
|
|
| 1. | The
dry bulb measures a. | humidity | b. | air
temperature | | | | |
|
|
| 2. | The
web bulb measures a. | humidity | b. | air
temperature | | | | |
|
|
| 3. | The
higher the relative humidity, the __________ evaporation you will get on the gauze.
|
|
| 4. | If
the air is very dry, then the relative humidity will be ....
|
|
| 5. | The
more evaporation you have, the ___________ the relative humidity.
|
|
| 6. | If
the wet bulb temperature is the same as the dry bulb temperature, relative humidity would
be
|
|
| 7. | When
you step out of a swimming pool on a windy summer day, you feel cold because of
a. | condensation | b. | evaporation | c. | dew
point | d. | relative
humidity | | | | | | | | |
|
|
| 8. | One
hundred percent humidity means ... a. | the air is not saturated. | c. | the air cannot hold any more
moisture. | b. | dew point has been reached. | d. | there is no moisture in the air. | | | | |
|
|
| 9. | It is
____________ to have the same relative humidity appear at different air
temperatures.
|
|
|
|
|
| 10. | At
noon the readings on a sling psychrometer are 18 deg. C for the dry-bulb thermometer and 14 deg. C
for the wet-bulb thermometer. What is the relative humidity?
|
|
| 11. | At 5
pm the psychrometer is used again. The reading on the dry-bulb thermometer is 12 deg. C, and the
reading on the wet-bulb thermometer is 11 deg. C. Determine the new relative
humidity.
|
|
| 12. | How
did the relative humidity change during the course of the day? a. | It decreased
from 14 to 11 deg. C. | c. | It increased
from noon to 5 pm. | b. | It showed no change. | d. | None of the above. | | | | |
|
|
| 13. | How
was the relative humidity affected by air temperature? a. | Warm air can
hold more moisture than cool air. | c. | Relative humidity increases when the temperature drops, given
the same amount of water vapor in the air. | b. | As temperature decreases, relative humidity
increases. | d. | All of the
above. | | | | |
|
|
| 14. | The
temperature at noon in Denver, Colorado, was 68 deg. F. What was the temperature in degrees
Celsius? a. | 55 deg.
C | b. | 41 deg.
C | c. | 20 deg.
C | d. | 64.8 deg.
C | | | | | | | | |
|
|
| 15. | What
is the temperature in degrees Celsius when a room thermometer reads 77 deg. F? a. | 25 deg.
C | b. | 32 deg.
C | c. | 45 deg.
C | d. | 77 deg.
C | | | | | | | | |
|
|
| 16. | The
correct formula for converting Fahrenheit to Celsius is a. | C = 9/5
(F-32) | b. | C = 9/5
(F+32) | c. | C= 5/9
(F+32) | d. | C = 5/9
(F-32) | | | | | | | | |
|
|
| 17. | The
correct formula for converting Celsius to Fahrenheit is a. | F = C x 1.8
+32 | b. | F = C +32 x
1.8 | c. | F = 5/9 C
+32 | d. | F = 5/9 C
-32 | | | | | | | | |
|
|
|
|
|
| 18. | What
is the relationship between the temperature of the dry-bulb thermometer and relative
humidity? a. | As temperature
decreases, relative humidity increases. | c. | As temperature decreases, relative humidity
decreases. | b. | As temperature increases, relative humidity
increases. | | | | |
|
|
| 19. | The
graph shows that when the dry-bulb thermometer is 42 deg. F, the relative humidity is
100%. That is the termperature at which condensation begins. What will the water vapor form as
it condenses? a. | ice
crystals | b. | water
droplets | c. | snowflakes | | | | | | |
|
|
| 20. | What
is the instrument used to measure relative humidity? a. | thermometer | b. | psychrometer | c. | barometer | d. | anemometer | | | | | | | | |
|