What instrument indicates the rate of climb or descent in a balloon?

What instrument indicates the rate of climb or descent in a balloon?

• A. Crown
• B. Thermistor
• C. Gondola
• D. Variometer

Answer: (D)

The main idea being tested is how pilots know vertical speed in balloon flight. The instrument that shows how fast you’re rising or descending is the variometer. It tracks changes in altitude over time and displays the rate of climb or descent, usually in feet per minute or meters per second, so the pilot can adjust the burner and control the flight path. This helps maintain a desired altitude and manage safety during the ascent or descent. The other items aren’t designed to indicate vertical speed: a crown isn’t an instrument, a thermistor measures temperature, and the gondola is the passenger cabin, not a rate indicator.

The main idea being tested is how pilots know vertical speed in balloon flight. The instrument that shows how fast you’re rising or descending is the variometer. It tracks changes in altitude over time and displays the rate of climb or descent, usually in feet per minute or meters per second, so the pilot can adjust the burner and control the flight path. This helps maintain a desired altitude and manage safety during the ascent or descent. The other items aren’t designed to indicate vertical speed: a crown isn’t an instrument, a thermistor measures temperature, and the gondola is the passenger cabin, not a rate indicator.