GATE_AE_2027_MOCK_01_Q21GATE 2027 Aerospace Engineering All-India Master Mock 01 (Foundation & Standard Core Calibration)MCQ · 1 Mark
Flight Mechanics & Space Dynamics • Atmospheric Flight Mechanics • Standard Atmosphere Properties
In the International Standard Atmosphere (ISA) isothermal stratosphere between $11\text{ km}$ and $20\text{ km}$ altitude, the ambient temperature is constant at:
(A) 216.65 K (-56.5 °C)
(B) 288.15 K (15.0 °C)
(C) 250.00 K (-23.15 °C)
(D) 180.50 K (-92.65 °C)
Answer Key:
A
Step-by-Step Verified Solution
### Solution: From $11\text{ km}$ to $20\text{ km}$, the ISA defines an isothermal layer at $T = 216.65\text{ K}$ ($-56.5^\circ\text{C}$). Correct: A.