Random3 Flashcards
the process of changing water from liquid to a vapour state when the tempreture is below 100° Celsius is called?
Evaporation
Air pressure decreases upward in the atmosphere. True or false?
True. At higher levels in the atmosphere there are less air molecules.
How does an increase in atmospheric pressure affect air density?
Air density increases also.
What is PIREP?
A pilot report of actual weather conditions as encountered by an aircraft in flight.
What does it mean when an aerodrome QFE is HIGHER than the QNH?
The aerodrome is below sea level.
What does TTCP stand for?
ANR Robinson International Tobago
What are the main characteristics of the troposphere ?
It’s main characteristics are
• A rate of temperature decrease with height of 6°C/km or 2°C/1000 ft
• A decrease of temperature horizontally towards the poles.
• The presence of both horizontal and vertical winds.
• Most amount of water vapour in the atmosphere.
• Most unstable layer containing fog, clouds, precipitation, storms etc.
Generally, when visibility varies directionally the greatest value is reported. True or False?
False. The lowest value is reported.
Is humid air heavier or lighter than dry air? Explain.
Humid air is lighter and less dense than dry air because it contains more water vapor than oxygen (air). Water vapor is lighter than oxygen.
As air temperature increases, its relative humidity decreases. True or False?
True. This is because air can hold more water molecules.
When temperatures drop, relative humidity increases.
What is atmospheric pressure?
Atmospheric pressure is the force exerted by the atmosphere on any surface in contact with it.
What happens to latent heat when water condenses?
It is released from water molecules, beats the air makes it lighter and rises fast.
