This question was previously asked in

HPPSC AE Civil 2016 (PWD-HIMUDA) Official Paper

- linearly increasing with height
- exponentially decreasing with height
- parabolic with height
- linearly decreasing with height

Option 2 : exponentially decreasing with height

**Explanation:**

The atmospheric pressure varies with altitude as the density of air decreases as we rise up and the air becomes rarer.

**For example** Pressure at sea level is taken as 76 cm of Mercury Column, which is one atmosphere. For every 105m rise in height, pressure decreases by 1 cm of mercury column.

So, the Pressure variation of air above sea level is exponentially decreasing with height.

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