MET pre-pt 2 Flashcards
Which gas in the atmosphere contributes most to the weather?
a.Nitrogen
b.Carbon dioxide
c.Water vapour
d.Oxygen
c.Water vapour
Which if the following statements is correct or incorrect?
1) in unsaturated air the dew point is always lower than the temp
2) the water vapour content is higher over ice than over water
a.1 and 2 are incorrect
b.1 is correct, 2 is incorrect
c.1 and 2 are correct
d.1 is incorrect, 2 is correct
b.1 is correct, 2 is incorrect
If the air temperature is 15 degrees and the dew point temperature is 10 degrees, what is the relative humidity?
a.15%
b.66%
c.85%
d.75%
d.75%
What contributes to the initiation of the condensation process?
a.micrometric and solid particles
b.cloud droplets
c.electromagnetic waves
d.gaseous carbon dioxide
a.micrometric and solid particles
The outside temperature is +30oC and the dew point is +21 oC. Calculate the relative humidity.
a.45%
b.65%
c.55%
d.75%
c.55%
Sinking air is normally void of cloud because
a.air is heated by expansion
b.air is cooled by compression
c.air is cooled adiabatically
d.air is heated by contraction
d.air is heated by contraction
The following describes which cloud type? “ …. Fine hair like filaments, silky sheen appearance..”
a.cumulus
b.cirrostratus
c.stratus
d.cirrus
cirrus
An aircraft is lined up on the runway ready to depart when a downburst is forecast. What action should be taken?
a.increase climb angle after take-off
b.decrease climb angle after take-off
c.increase take-off speed
d.delay departure
d.delay departure
Coalescence:
a.only happens in convective cloud
b.at mid-latitudes can only form drizzle or light rain
c.is responsible for almost all of the precipitation at mid-latitudes
d.is only possible in the tropics
b.at mid-latitudes can only form drizzle or light rain
what symbol would indicate moderate snow falling from a cumulus cloud?
a.+SN
b.SHGR
c.SHSN
d.GR
c.SHSN
Excluding Radiation, convection and latent heat, the atmosphere is heated by
[turbulence and conduction]
Highest peak of a mountain is 12500ft, the lowest known temp in the region is ISA -25, lowest known QNH is 980hPa. What is the minimum flight level a pilot can select to clear the mountain by 2000ft? (Assume 30ft or 9m = 1hPa). Type in a number only.
170
(TEC: 1450’
Correct to 1013hpa: 15490’
15490 + 1450 = 16940 (FL170)
In a vertical cross section of a pressure system, the pressure in the upper air is creating a downward bulge and the pressure at the surface is creating an upward bulge. What type of pressure system is being described?
a.warm high
b.cold low
c.cold high
d.warm low
c.cold high
At a height of 5km above ground level there is a high pressure system above position A and a low pressure system above position B. The horizontal distance between positions A and B is 1000km. The barometric air pressure at the earth’s surface in positions A and B is
a.Lower at position A than at position B due to the thickness of the friction layer
b.Higher or lower at A than B depending on the humidity status of the air
c.Higher or lower at A than B or the same in A and B depending on the air temperature above A and B
d.Higher at position A than position B independent of the air temperature above A and B
c.Higher or lower at A than B or the same in A and B depending on the air temperature above A and B
Over Caen airport in France the transition altitude is given as 13000ft and the transition level as FL150. If the QNH on the airfield if 1003hPa, what is the vertical extent of the transition layer? (assume 1 hPa = 40 ft)
a.2000ft
b.1500ft
c.1600ft
d.1210ft
c.1600ft
