Free Commercial Pilot Balloon - Gas Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Commercial Pilot Balloon - Gas practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1A gas-balloon pilot completed a flight review in October 2024 and has earned no substitute credit. What is the last month in which that review alone satisfies the flight-review requirement for acting as pilot in command?

   1. A. September 2025
   2. B. October 2025
   3. C. September 2026
   4. D. October 2026

   Answer: D

   Explanation: Section 61.56(c) measures the period from "the beginning of the 24th calendar month before the month in which that pilot acts as pilot in command". October 2024 remains within that window through October 2026; it falls outside the window in November 2026.

   Reference: 14 CFR Part 61 — Certification: Pilots, Flight Instructors, and Ground Instructors — § 61.56(c)

2. 2For a gas balloon, what determines the upward buoyant force exerted by the surrounding air?

   1. A. The weight of the displaced air
   2. B. The weight of the lifting gas
   3. C. The weight of the suspended payload
   4. D. The weight of the envelope fabric

   Answer: A

   Explanation: The handbook states: "The net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the object." Air is the displaced fluid. Its weight determines buoyant force, before subtracting lifting-gas and aircraft weights.

   Reference: Balloon Flying Handbook — Chapter 2: Hot Air Balloon Design, Systems, & Theory — p. 2-2, Why Do Balloons Fly?

3. 3A balloon pilot sees temperature increasing from 2,000 to 4,000 feet on an atmospheric sounding. What is this layer called?

   1. A. An inversion
   2. B. An isothermal layer
   3. C. A standard lapse-rate layer
   4. D. A dry-adiabatic layer

   Answer: A

   Explanation: The handbook states: "An increase in temperature with altitude is defined as an inversion." An inversion reverses the usual tropospheric temperature decrease with height.

   Reference: Balloon Flying Handbook — Chapter 4: Weather Theory & Reports — p. 4-4, Temperature Variation with Altitude

4. 4At ISA sea-level conditions, use the handbook's helium gross-lift factor of 2.329 pounds per cubic meter. What gross lift does 800 cubic meters provide, before subtracting aircraft and payload weights?

   1. A. 1,863.2 pounds
   2. B. 2,329.0 pounds
   3. C. 343.5 pounds
   4. D. 2,161.6 pounds

   Answer: A

   Explanation: The handbook states: "simple multiplication of 2.329 pounds times the volume of the envelope." Multiply 2.329 × 800 = 1,863.2 pounds. Using 1,000 cubic meters gives 2,329; dividing 800 by 2.329 gives 343.5; using displaced-air weight of 2.702 alone gives 2,161.6.

   Reference: Balloon Flying Handbook — Chapter 11: The Gas Balloon — p. 11-7, Lift at Sea Level

5. 5A zero-pressure gas balloon climbs above its current pressure ceiling with the appendix open. What performance consequence should the pilot expect?

   1. A. Loss of lifting gas with reduced gross lift
   2. B. Loss of lifting gas with increased gross lift
   3. C. Retention of lifting gas with reduced gross lift
   4. D. Retention of lifting gas with unchanged gross lift

   Answer: A

   Explanation: The source states: "Exceeding the current pressure ceiling causes loss of lifting gas, reduces gross lift, and typically causes the balloon to eventually begin to descend." Expansion beyond full envelope volume expels gas. This consumes lift and can require ballast to sustain the new altitude.

   Reference: Balloon Flying Handbook — Chapter 11: The Gas Balloon — p. 11-8, Pressure Ceiling

6. 6A gas-balloon pilot measures a route on a sectional aeronautical chart. What is the standard scale of that chart?

   1. A. 1:24,000
   2. B. 1:250,000
   3. C. 1:500,000
   4. D. 1:1,000,000

   Answer: C

   Explanation: The handbook states: "These charts are at a scale of 1:500,000" This is the sectional scale. A terminal area chart uses 1:250,000; the other scales are not the standard sectional scale.

   Reference: Balloon Flying Handbook — Chapter 3: Preflight Planning — p. 3-4, Navigation

7. 7A gas-balloon pilot dismisses an instructor's procedural advice because following rules would spoil the enjoyment of flying. Which hazardous attitude is expressed?

   1. A. Resignation
   2. B. Anti-authority
   3. C. Invulnerability
   4. D. Impulsivity

   Answer: B

   Explanation: The anti-authority example rejects the instructor’s "do-it-by-the-book attitude" as spoiling enjoyment. This matches rejection of procedural authority, rather than helplessness, immunity to harm, or a need to act immediately.

   Reference: Balloon Flying Handbook — Chapter 1: Introduction to Balloon Flight Training — p. 1-8, Figure 1-5

8. 8During a rapid descent in a gas balloon, what appendix action helps prevent outside air from being forced into the envelope?

   1. A. Close the appendix during the rapid descent
   2. B. Open the appendix farther during the rapid descent
   3. C. Pulse the appendix open throughout the rapid descent
   4. D. Hold the appendix partially open during the rapid descent

   Answer: A

   Explanation: The source states: "care should be taken to close the appendix when descending rapidly to avoid allowing air to force its way up into the envelope through the open appendix." Closing the appendix during this rapid descent limits air entry. It must be opened for rapid or prolonged ascents approaching the pressure ceiling.

   Reference: Balloon Flying Handbook — Chapter 11: The Gas Balloon — p. 11-15, Purity of Lifting Gas

9. 9A U.S.-registered gas balloon remains at a cabin pressure altitude of 13,000 feet for 45 minutes. Under § 91.211(a)(1), for how many minutes of that period must the required minimum flightcrew, at a minimum, use supplemental oxygen?

   1. A. 0 minutes
   2. B. 15 minutes
   3. C. 30 minutes
   4. D. 45 minutes

   Answer: B

   Explanation: The source states: "for that part of the flight at those altitudes that is of more than 30 minutes duration;" At above 12,500 through 14,000 feet, use is required for the portion beyond 30 minutes. Forty-five minus thirty is fifteen minutes.

   Reference: 14 CFR Part 91 — General Operating and Flight Rules — § 91.211(a)(1)

10. 10An authorized commercial balloon pilot explains and demonstrates a maneuver, then has the student practice it under supervision. Which teaching method is being used?

    1. A. Lecture
    2. B. Guided discussion
    3. C. Demonstration-performance
    4. D. Computer-based training

    Answer: C

    Explanation: The source states: "Students learn physical or mental skills by actually performing those skills under supervision." The demonstration-performance section applies supervised performance to maneuver training, rather than using a lecture, discussion, or computer presentation as the primary method.

    Reference: Balloon Flying Handbook — Chapter 10: The Instructional Process — pp. 10-16–10-17, Demonstration-Performance Method