FAA Ground School Practice Test

What is the purpose of AIRMETs?

1. To warn about conditions hazardous to large aircraft

2. To provide information about significant weather phenomena of lower intensity than SIGMETs

3. To give general weather information for the next 24 hours

4. To offer updates on meteorological anomalies

The correct answer is: To provide information about significant weather phenomena of lower intensity than SIGMETs

AIRMETs are intended to provide information about significant weather phenomena that are considered hazardous to smaller aircraft due to their lower intensity compared to the conditions addressed by SIGMETs. AIRMETs focus on specific weather concerns such as turbulence, icing, and visibility issues at lower altitudes, making them particularly relevant for general aviation, where smaller aircraft operate. The purpose of AIRMETs is crucial for pilots flying these smaller aircraft, as it allows them to be aware of potentially hazardous atmospheric conditions that might not meet the criteria for a SIGMET, which addresses more severe weather phenomena affecting larger aircraft or broader areas. In contrast to the other options, which reference warnings about large aircraft, general weather information, or updates on anomalies, the primary and defining function of AIRMETs is their focus on significant but less intense weather conditions that could still pose risks to flight safety.