Frost is formed when:
a,Water vapour sublimates directly into a solid state.
b,Super-cooled water droplets freeze upon objects turning into crystals.
c,Condensed water droplets are cooled to the freezing point forming ice particles.
d,The dewpoint is lowered to the condensation point.
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a,Water vapour sublimates directly into a solid state.
29) An isobar is:
a- A line on a weather map joining places of equal temperature
b- An instrument used in the measurement of atmospheric pressure
c- A line on a weather map joining places of equal barometric pressure
d- A line on a weather map indicating the pressure at a front
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c- A line on a weather map joining places of equal barometric pressure
22) Thunderstorms may form when there is a combination of:
a- Unstable air, high humidity, lifting force
b- Stable, high humidity, lifting force
c- Unstable air, high humidity, descending force
d- Stable air, high humidity, descending force
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a- Unstable air, high humidity, lifting force
38) List the layers of the atmosphere in the order from lowest to highest.
a- Troposphere, stratosphere, mesosphere, thermosphere
b- Troposphere, stratosphere, thermosphere, mesosphere
c- Thermosphere, stratosphere, troposphere, mesosphere,
d- Thermosphere, stratosphere, mesosphere, troposphere
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a- Troposphere, stratosphere, mesosphere, thermosphere
15) An air mass is:
a- An extensive body of air within which the temperature and humidity (in a horizontal
, plane) are practically uniform.
b- A body of air with a volume of more than one thousand cubic miles.
c- An area of continuous precipitation.
d- A large body of air with temperature and humidity constant in the vertical.
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a- An extensive body of air within which the temperature and humidity (in a
horizontal plane) are practically uniform.
39) Hoar frost forms on an aircraft as a result of
a- supercooled water droplets freezing on impact.
b- freezing rain striking the aircraft.
c- water vapour turning directly into ice crystals on the aircraft.
d- water vapour condensing on the aircraft and then freezing.
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c- water vapour turning directly into ice crystals on the aircraft.
41) When unsaturated air is forced to rise, the expansion of the rising air causes it to
cool. This cooling is called
a- the normal lapse rate and is 1.98C per 1,000ft.
b- Advection cooling and is 2C per 1000ft.
c- Radiation cooling and is 3C per 1000ft.
d- the dry adiabatic lapse rate and is 3C per 1000ft.
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a,Water vapour sublimates directly into a solid state.
b,Super-cooled water droplets freeze upon objects turning into crystals.
c,Condensed water droplets are cooled to the freezing point forming ice particles.
d,The dewpoint is lowered to the condensation point.
Give this one a try later!
a,Water vapour sublimates directly into a solid state.
29) An isobar is:
a- A line on a weather map joining places of equal temperature
b- An instrument used in the measurement of atmospheric pressure
c- A line on a weather map joining places of equal barometric pressure
d- A line on a weather map indicating the pressure at a front
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c- A line on a weather map joining places of equal barometric pressure
22) Thunderstorms may form when there is a combination of:
a- Unstable air, high humidity, lifting force
b- Stable, high humidity, lifting force
c- Unstable air, high humidity, descending force
d- Stable air, high humidity, descending force
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a- Unstable air, high humidity, lifting force
38) List the layers of the atmosphere in the order from lowest to highest.
a- Troposphere, stratosphere, mesosphere, thermosphere
b- Troposphere, stratosphere, thermosphere, mesosphere
c- Thermosphere, stratosphere, troposphere, mesosphere,
d- Thermosphere, stratosphere, mesosphere, troposphere
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a- Troposphere, stratosphere, mesosphere, thermosphere
15) An air mass is:
a- An extensive body of air within which the temperature and humidity (in a horizontal
, plane) are practically uniform.
b- A body of air with a volume of more than one thousand cubic miles.
c- An area of continuous precipitation.
d- A large body of air with temperature and humidity constant in the vertical.
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a- An extensive body of air within which the temperature and humidity (in a
horizontal plane) are practically uniform.
39) Hoar frost forms on an aircraft as a result of
a- supercooled water droplets freezing on impact.
b- freezing rain striking the aircraft.
c- water vapour turning directly into ice crystals on the aircraft.
d- water vapour condensing on the aircraft and then freezing.
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c- water vapour turning directly into ice crystals on the aircraft.
41) When unsaturated air is forced to rise, the expansion of the rising air causes it to
cool. This cooling is called
a- the normal lapse rate and is 1.98C per 1,000ft.
b- Advection cooling and is 2C per 1000ft.
c- Radiation cooling and is 3C per 1000ft.
d- the dry adiabatic lapse rate and is 3C per 1000ft.
Give this one a try later!
