SIFT Aviation Weather and Navigation Questions and Answers Flashcards
6 cards from real SIFT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 SIFT Aviation Weather and Navigation Questions and Answers flashcards as text
Which cloud type is considered most hazardous to Army aviation due to severe turbulence, icing, and lightning?
Answer: Cumulonimbus
Cumulonimbus clouds are associated with thunderstorms and produce the most severe aviation hazards: extreme turbulence, hail, icing, windshear, and lightning.
What does the aviation acronym VFR stand for?
Answer: Visual Flight Rules
VFR stands for Visual Flight Rules, the set of regulations under which a pilot can fly using outside visual references rather than relying solely on instruments.
Which atmospheric layer contains virtually all weather phenomena that affect Army aviation operations?
Answer: Troposphere
The troposphere, extending from the surface to roughly 36,000 feet, contains almost all of the water vapor and weather that pilots encounter.
Wind shear is most dangerous for helicopter operations during which phase of flight?
Answer: Takeoff and landing
During takeoff and landing, helicopters operate at low speed and low altitude, leaving little margin to recover from the sudden airspeed or lift changes caused by wind shear.
What is the standard temperature lapse rate in the troposphere used for pressure altitude calculations?
Answer: 2°C per 1,000 feet
The International Standard Atmosphere (ISA) defines a lapse rate of approximately 2°C (3.5°F) per 1,000 feet of altitude gain in the troposphere.
A rapidly falling barometric pressure reading most reliably indicates:
Answer: An approaching storm system with deteriorating conditions
A rapid drop in barometric pressure signals the approach of a low-pressure system, which typically brings clouds, precipitation, and worsening weather.