ATPL Meteorology

Question 1

What type of fog forms when warm, moist air moves over a cooler surface?

Accepted Answer

Advection fog

Answer

Advection fog forms when warm, moist air is transported horizontally over a cooler surface, causing the air to cool below its dew point.

Question 2

A SIGMET advisory for the contiguous US is valid for a maximum of how many hours?

Accepted Answer

4 hours

Answer

SIGMETs for the contiguous US are valid for up to 4 hours, though convective SIGMETs are valid for only 2 hours.

Question 3

Which cloud type is most associated with severe turbulence, icing, and lightning?

Accepted Answer

Cumulonimbus

Answer

Cumulonimbus clouds are towering convective clouds that produce severe turbulence, heavy icing, lightning, and can contain hail.

Question 4

What is the standard lapse rate of temperature in the troposphere?

Accepted Answer

3°C per 1,000 ft

Answer

The International Standard Atmosphere (ISA) defines the standard lapse rate as approximately 3°C (or 2°C) per 1,000 feet — the ISA value is 1.98°C/1,000 ft, commonly rounded to 2°C for calculations, but the standard used in ATPL is 2°C/1,000 ft or 6.5°C/km.

Question 5

A temperature inversion is characterized by:

Accepted Answer

Temperature increasing with altitude

Answer

A temperature inversion is a layer of the atmosphere where temperature increases with altitude rather than the normal decrease, trapping pollutants and moisture below.

ATPL - Airline Transport Pilot License Practice Test

ATPL - Airline Transport Pilot License Practice Test

ATPL Meteorology