Test yourself: 5 hard theory questions, free Airspace, weather, regs and aerodynamics, FAA-style — instant score, every answer explained. No signup.

easytemperature

The ISA temperature lapse rate in the troposphere is:

1.98°C / 1000 ft (6.5°C / km). The ISA standard lapse rate is approximately 1.98°C per 1000 ft or 6.5°C per km in the troposphere.

1°C / 1000 ft

2°C / 1000 ft

1.98°C / 1000 ft (6.5°C / km)

3°C / 1000 ft

1.98°C / 1000 ft (6.5°C / km)✓ Correct Answer

Explanation

The ISA standard lapse rate is approximately 1.98°C per 1000 ft or 6.5°C per km in the troposphere.

See where you stand: 5 hard questions, instant score, every answer explained.