Part 107: As a pilot, flying for long periods in hot summer temperatures increases the susceptibility of dehydration because...

Question

As a pilot, flying for long periods in hot summer temperatures increases the susceptibility of dehydration because...

A. dry air at altitude tends to increase the rate of water loss from the body

B. moist air at altitude helps retain the body's moisture.

C. temperature decreases with altitude.

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Answer

The correct answer here is A. Dry air at altitude tends to increase the rate of water loss from the body.

During the hot/summer temperatures, long periods of being outside flying in the dry air/high altitudes makes you sweat and lose fluids at a faster than normal rate. If you don't replenish these fluids you will feel dehydrated and lead to fatigue and decreased performance as a pilot while flying.

This question may seem kind of silly, it's an important one that the FAA wants you to know. C is the just plain wrong. B is also wrong - so A is the only correct option here. Again, not really a hard question - but one that will show up on the test!