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Performancemedium#632

The ISA temperature lapse rate in the troposphere is:

A

1.98°C per 1000 ft

Correct
B

2°C per 1000 ft

C

1°C per 1000 ft

D

3°C per 1000 ft

Explanation

The ISA lapse rate is approximately 1.98°C (often rounded to 2°C) per 1000 ft up to the tropopause.

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