MET Q7 - Humidity Flashcards
Absolute humidity is:
Select one:
a.the maximum amount of water vapour that a given quantity of air can hold
b.the number of water droplets in a given quantity of air
c.the amount of water vapour that a given quantity of air holds
d.the maximum number of water droplets that a given quantity of air can hold
c. the amount of water vapour that a given quantity of air holds
What is the humidity mixing ratio?
Select one:
a.The number of grams of water vapour per cubic metre of dry air
b.The ratio between actual water vapour content and saturated water vapour content
c.The volume of water vapour which is mixed with each volume of dry air
d.The number of grams of water vapour per kilogram of dry air
d. The number of grams of water vapour per kilogram of dry air
Saturation is
Select one:
1.when a sample of air contains an equal amount of oxygen, nitrogen and water vapour molecules
2.when a sample of air contains the maximum amount of water vapour that it can support at a given temperature and pressure
3.the amount of water vapour in a sample of air
4.when a sample of air contains the maximum amount of water vapour that it can support at a varying temperature and pressure
2.when a sample of air contains the maximum amount of water vapour that it can support at a given temperature and pressure
Dew point
Select one:
1.is the point at which a sample of air becomes saturated
2.is the place where water droplets form on the surface
3.coincides with the time the sun rises above the horizon
4.is the point at which the diurnal temperature is at its lowest
1.is the point at which a sample of air becomes saturated
If the relative humidity is 100% then the actual water vapour content would be
Select one:
1.greater at 10,000ft than at mean sea level
2.greater in a tropical air mass than in a polar air mass
3.greater in a polar air mass than a tropical air mass
4.the same at the poles and at the equator
- greater in a tropical air mass than in a polar air mass
Relative humidity
Select one:
1.will be greater in warmer climates compared to colder climates
2.is the amount of water vapour in a sample of air compared to how much that sample of air could contain
3.remains constant with changes in temperature
4.is the amount of water vapour in a sample of air at any given time
- is the amount of water vapour in a sample of air compared to how much that sample of air could contain
Relative humidity will be greatest
Select one:
1.when the daily temperature is at its highest
2.when the daily temperature is at its lowest
3.will be highest at midnight
4.is not affected by the diurnal temperature range
- when the daily temperature is at its lowest
If ‘T’ is temperature and ‘Dp’ is dew point, cloud or fog is most likely to form when
Select one:
- T: 06 and Dp: 04
- T: 12 and Dp: 06
- T: 06 and Dp: -05
- T: 28 and Dp: 24
T: 06 and Dp: 04
During which of the following processes is latent heat absorbed?
Select one:
1.Melting and evaporation
2.Freezing and condensation
3.Melting and condensation
4.Evaporation and freezing
- Melting and evaporation
If vapour were introduced into a parcel of air due to evaporation, how would its characteristics change if pressure and temperature were to remain the same?
Select one:
a.The mixing ratio would increase, the saturated mixing ratio would increase and relative humidity would increase.
b.The mixing ratio would remain constant, the saturated mixing ratio would increase and relative humidity would increase.
c.The mixing ratio would increase, the saturated mixing ratio would remain constant and relative humidity would increase.
d.The mixing ratio would increase, the saturated mixing ratio would remain constant and relative humidity would decrease.
c. The mixing ratio would increase, the saturated mixing ratio would remain constant and relative humidity would increase.
