The GATE Grind

GATE 2022 MN – Question 25

Surface Environment, Mine Ventilation and Underground Hazards · Surface Environment · 1 mark · Multiple choice

The ambient lapse rate exceeds the dry adiabatic lapse rate. Classify the atmosphere.

  1. Stable
  2. Neutral
  3. Unstable
  4. Strongly stable

Practise this question in The GATE Grind →

Show answer and explanation

Correct answer: (C) Unstable

Explanation

A lifted dry parcel cools at the dry adiabatic rate. If the environment cools faster with height, the parcel becomes warmer and less dense than its surroundings, so its upward displacement grows. The atmosphere is unstable, C. Equal lapse rates would instead give dry neutral stability.

More Surface Environment questions

All Surface Environment questions →