20520191
Descripción
Test por Iván Álamo, actualizado hace más de 1 año
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Creado por Iván Álamo
hace casi 5 años
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Pregunta 1
Pregunta
The measurement of surface temperature is made:
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At ground level.
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At approximately 10 metres above ground level.
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At approximately 4 feet above ground level.
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At approximately 4 metres above ground level
Pregunta 2
Pregunta
Cloud cover will reduce diurnal variation of temperature because:
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Incoming solar radiation is partially reflected back to space and outgoing terrestrial radiation is reflected back to earth.
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Incoming solar radiation is re-radiated back to space and atmospheric heating by convection will stop at the level of the cloud layer
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The cloud stops the sun rays getting through to the earth and also reduces outgoing conduction.
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Incoming solar radiation is partially reflected back to space and outgoing terrestrial radiation is mostly re-radiated from the cloud layer back to the surface.
Pregunta 3
Pregunta
Most accurate temperatures above the ground level are obtained by:
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Tephigram
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Aircraft reports
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Temperature probes.
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Radio sonde.
Pregunta 4
Pregunta
The diurnal variation of temperature is:
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Greater over sea than overland
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Less over desert areas than over temperate grassland.
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Reduced anywhere by the presence of cloud.
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Increased anywhere as wind speed increases.
Pregunta 5
Pregunta
Over continents and oceans, the relative temperature conditions are:
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Warmer in winter over land, colder in summer over sea
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Colder in winter over land, warmer in winter over sea.
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Cold in winter over land and sea
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Warmer in summer over land and sea.
Pregunta 6
Pregunta
The process of change of state from a liquid mass to a gas mass is:
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Condensation in which latent heat is released.
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Evaporation in which latent heat is released
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Condensation in which latent heat is absorbed
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Evaporation in which latent heat is absorbed by the mass
Pregunta 7
Pregunta
Air is classified as dry or saturated according to its relative humidity. If the
relative humidity were 95% the air would be classified as
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Conditionally saturated.
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Not saturated.
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Saturated
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Dry
Pregunta 8
Pregunta
On a wet bulb thermometer in an unsaturated atmosphere there will be a
reduction of temperature below that of the dry bulb thermometer because:
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Heat is absorbed during the process of condensation.
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Heat is released during the process of condensation.
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Heat is absorbed by the thermometer during the process of evaporation
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Heat is released from the thermometer during the process of evaporation.
Pregunta 9
Pregunta
Relative humidity is:
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Air temperature over wet bulb temperature * 100.
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Air temperature over dew point temperature * 100.
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The actual mixing ratio of water vapour in a sample of air over the maximum mixing ratio of water vapour that this sample can contain * 100
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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.
Pregunta 10
Pregunta
Absolute humidity is
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The number of water droplets in a given quantity of air
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The mass of water vapour that a volume of air holds
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The maximum amount of water vapour that a given quantity of air can hold.
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The maximum number of water droplets that a given quantity of air can hold.
Pregunta 11
Pregunta
Wet bulb temperature would normally be lower than the dry bulb temperature
because
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condensation causes a release of latent heat.
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evaporation causes cooling of the bulb.
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latent heat is absorbed by the bulb thermometer.
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of condensation on the muslin wick of the bulb
Pregunta 12
Pregunta
The wet bulb temperature
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Is measured using a hydromete
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Is the minimum temperature to which a thermometer bulb can be cooled by the evaporation of water
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Measures the dew point of air
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Is the minimum temperature reached by the surface of the earth as measured by a thermometer placed 1.2 metres above the ground.
Pregunta 13
Pregunta
Which one of the following statements relating to atmospheric humidity is
correct:
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If the air temperature falls then the absolute humidity must increase
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The absolute humidity is the mass of water vapour contained in unit volume of air.
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The diurnal variation of dewpoint temperature is greatest when skies are clear at night
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The dewpoint temperature is the temperature indicated by the wet bulb thermometer.
Pregunta 14
Pregunta
When condensation takes place, the higher temperature, the _____ the amount of
latent heat_____:
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lesser released
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grater absorbed
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greater released
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lesser absorbed
Pregunta 15
Pregunta
When water vapour changes to ice:
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Latent heat is absorbed.
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Specific heat is released
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Latent heat is released.
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Specific heat is absorbed.
Pregunta 16
Pregunta
Throughout the 24hrs of a day the Relative Humidity can be expected to:
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Increase during the day and decrease at night.
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Stay reasonably constant throughout the 24 hours.
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Reduce during the day and increase at night.
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Only change with a change of airmass.
Pregunta 17
Pregunta
During a night with a clear sky, surface temperature will_____RH will_____
and dewpoint will_____:
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Fall, rise rise
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Rise, rise, fall.
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Fall, rise, remain the same.
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Fall, fall, remain the same
Pregunta 18
Pregunta
A change of state directly from a solid to a vapour or vice versa is:
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Insolation
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Condensation
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Evaporation
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Sublimation
Pregunta 19
Pregunta
The instrument used for measuring the humidity of air is a:
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Hydrometer
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Hygrometer
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Wet bulb thermometer
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Hygroscope
Pregunta 20
Pregunta
The process of change of state from a gas to a liquid is:
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Evaporation in which latent heat is absorbed.
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Evaporation in which latent heat is released.
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Condensation in which latent heat is absorbed.
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Condensation in which latent heat is released.
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