MET The actual progress test 01 Flashcards
What weather condition occurs at the altitude where the dewpoint lapse rate and the dry adiabatic lapse rate converge?
Select one:
a. Stable air changes to unstable air.
b. Cloud bases form. Correct
c. Precipitation starts.
d. Unstable air changes into stable air.
b
What can be said about isobars?
Select one:
a. Isobars appear on meteorological surface charts. Correct
b. Certain information can be depicted with the isobars on upper level charts.
c. Isobars show wind speeds around a jet stream area.
d. Isobars are lines of equal temperature.
a
The environmental lapse rate is less than 1° C/100m
Select one:
a. True altitude to be higher than Indicated altitude. Correct
b. True altitude to be the decreasing.
c. True altitude to be the same as Indicated altitude.
d. True altitude to be lower than Indicated altitude.
a
After landing at an aerodrome (QNH 993hPa) it is noticed that the altimeter is still set to 1013.2hPa and that it reads 1200ft. What is the elevation of the aerodrome above mean sea level?
Select one:
a. 700ft
b. 1200ft
c. 660ft Correct
d. 2280ft
c
A layer is absolutely unstable if the temperature decrease with height is
Select one:
a. 0.65°C per 100m
b. between 1°C per 100m and 0.65°C per 100m
c. less than 0.65°C per 100m
d. more than 1°C per 100m
d
The heat energy used to change water vapour into liquid water:
Select one:
a. is released to the atmosphere as latent heat. Incorrect
b. is then stored in the water vapour as latent heat.
c. modifies the DALR to the SALR.
d. is passed to the surface from which the water is evaporating.
c
The atmosphere is heated primarily by:
Select one:
a. earth bound electromagnetic radiation.
b. shortwave terrestrial radiation from the earth.
c. the suns insolation.
d. long wave terrestrial radiation released by the earth.
d
A sample of moist but unsaturated air may become saturated by
Select one:
a. compressing it adiabatically
b. lowering the pressure, keeping temperature constant
c. raising the temperature
d. expanding it adiabatically
d
When the upper part of a layer of warm air is advected:
Select one:
a. wind will back with increase in height in the Northern Hemisphere.
b. stability increases within the layer. Incorrect
c. stability decreases within the layer.
d. wind speed will always decrease with increase in height in the Northern Hemisphere.
c
Crappy question, memorize
In a layer of air the decrease in temperature per 100 metres increase in height is more than 1°C. This layer can be described as being
Select one:
a. absolutely stable
b. conditionally stable
c. absolutely unstable Correct
d. conditionally unstable
c
Density altitude:
Select one:
a. may be found on the navigation computer by setting outside air temperature against pressure altitude in the altitude window. Incorrect
b. is the altitude in the standard atmosphere to which the observed density corresponds.
c. is the altitude shown on the altimeter when 1013 mb is set on the sub-scale.
d. increases with a decrease in temperature compared with ISA.
b
Which of the following statements concerning the lifting of a parcel of air is correct?
Select one:
a. Unsaturated parcels cool less rapidly than saturated parcels
b. Unsaturated parcels cool at a rate of 0.65°C per 100m
c. Saturated parcels always cool at a rate of 0.65°C per 100m
d. Unsaturated parcels cool more rapidly than saturated parcels
d
Relative humidity…
Select one:
a. does not change when water vapour is added provided the temperature of the air remains constant
b. is not affected by temperature changes of the air
c. is not affected when air is ascending or descending
d. changes when water vapour is added, even though the temperature remains constant
d
If a saturated air mass descends down a slope its temperature increases at
Select one:
a. a lower rate than in dry air, as evaporation absorbs heat Correct
b. the same rate as if the air mass were dry
c. a higher rate than in dry air, as it gives up latent evaporation heat
d. a lower rate than in dry air, as condensation gives out heat
a
At which average height can the 500 hPa pressure level in moderate latitudes be expected?
Select one:
a. 12,0 km AMSL.
b. 3,0 km AMSL.
c. 5,5 km AMSL. Correct
d. 9,0 km AMSL.
c