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Humidity- Meteorology- Oxford

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#1. Throughout the 24 hours of a day the Relative Humidity can be expected to:

increase during the day and decrease at night

stay reasonably constant throughout the 24 hours

reduce during the day and increase at night

only change with a change of air mass

#2. During a night with a clear sky, surface temperature will RH will and dew point will.

fall, rise, rise

rise, rise, fall

fall, rise, remain the same

fall, fall, remain the same

#3. A change of state directly from a solid to a vapour or vice versa is:

insolation

condensation

evaporation

sublimation

#4. The instrument used for measuring the humidity of air is a:

hydrometer

hygrometer

wet bulb thermometer

hygroscope

#5. The process of change of state from a gas to a liquid is:

evaporation in which latent heat is absorbed

evaporation in which latent heat is released

condensation in which latent heat is absorbed

condensation in which latent heat is released

#6. The process of change of state from a liquid to a gas is:

condensation in which latent heat is released

evaporation in which latent heat is released

condensation in which latent heat is absorbed

evaporation in which latent heat is absorbed

#7. Air is classified as dry or saturated according to its relative humidity. If the relative humidity were 95%, the air would be classified as:

conditionally saturated

partially saturated

saturated

dry

#8. On a wet bulb thermometer in an unsaturated atmosphere there will be a reduction of temperature below that of the dry bulb thermometer because:

heat is absorbed during the process of condensation

heat is released during the process of condensation

heat is absorbed by the thermometer during the process of evaporation

heat is released from the thermometer during the process of evaporation

#9. Relative humidity is:

air temperature over wet bulb temperature × 100

air temperature over dew point temperature × 100

the actual amount of water vapour in a sample of air over the maximum amount of water vapour that the sample can contain × 100

the maximum amount of water vapour that a sample of air can contain over the actual amount of water vapour the sample does contain × 100

#10. Absolute humidity is:

the number of water droplets in a given quantity of air

the amount of water vapour that a given quantity of air holds

the maximum amount of water vapour that a given quantity of air can hold

the maximum number of water droplets that a given quantity of air can hold

#11. Wet bulb temperature would normally be lower than the dry bulb temperature because:

condensation causes a release of latent heat

evaporation causes cooling

latent heat is absorbed by the bulb thermometer

of condensation on the muslin wick of the bulb

#12. The wet bulb temperature:

is measured using a hydrometer

is the minimum temperature to which a thermometer bulb can be cooled by the evaporation of water

measures the dew point of the air

is the minimum temperature reached by the surface of the earth as measured by a thermometer placed 1.2 metres above the ground

#13. Which one of the following statements relating to atmospheric humidity is correct?

If the air temperature falls then the absolute humidity must increase

The absolute humidity is the mass of water vapour contained in unit volume of air

The diurnal variation of dew point temperature is greatest when skies are clear at night

The dew point temperature is the temperature indicated by the wet bulb thermometer

#14. When condensation takes place, the higher the temperature, the the amount of latent heat_:

lesser; released

greater; absorbed

greater; released

lesser; absorbed

#15. When water vapour changes to ice:

latent heat is absorbed

specific heat is released

latent heat is released

specific heat is absorbed

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Humidity- Meteorology- Oxford

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#1. Throughout the 24 hours of a day the Relative Humidity can be expected to:

#2. During a night with a clear sky, surface temperature will ____________ RH will______________ and dew point will__________.

#3. A change of state directly from a solid to a vapour or vice versa is:

#4. The instrument used for measuring the humidity of air is a:

#5. The process of change of state from a gas to a liquid is:

#6. The process of change of state from a liquid to a gas is:

#7. Air is classified as dry or saturated according to its relative humidity. If the relative humidity were 95%, the air would be classified as:

#8. On a wet bulb thermometer in an unsaturated atmosphere there will be a reduction of temperature below that of the dry bulb thermometer because:

#9. Relative humidity is:

#10. Absolute humidity is:

#11. Wet bulb temperature would normally be lower than the dry bulb temperature because:

#12. The wet bulb temperature:

#13. Which one of the following statements relating to atmospheric humidity is correct?

#14. When condensation takes place, the higher the temperature, the the amount of latent heat_:

#15. When water vapour changes to ice:

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#2. During a night with a clear sky, surface temperature will RH will and dew point will.