UUS Practice Tests⌕ Search
Aviation · SPL

FAA Sport Pilot Lighter-Than-Air (Airship) Knowledge Test Practice Test

Airship flight depends on understanding buoyant lift, engine-generated thrust, and the controls used to manage direction and altitude. Practice questions sample concepts such as how temperature affects lifting gas, how propeller slipstream can influence control surfaces, and how pilots interpret altitude indications and flight signals.

Exam overview

Exam providerFederal Aviation Administration
Exam codeSPL
CategoryAviation

About the FAA Sport Pilot Lighter-Than-Air (Airship) Knowledge Test Exam

Airship pilots combine aerodynamic knowledge with decisions shaped by a lighter-than-air aircraft’s operating characteristics. Useful skills include distinguishing indicated airspeed from groundspeed, understanding what a transponder communicates, and interpreting control-tower light signals when radio communication is unavailable. Flight preparation also involves considering lifting-gas behavior as temperature changes and recognizing conditions that warrant delaying a flight while the situation is assessed. Operational awareness extends to passenger movement around an operating airship, the purpose of landing gear, and the effect of engine and propeller operation on nearby controls. These concepts connect aircraft-system knowledge with practical judgment: pilots must interpret indications in context, anticipate how aircraft response may change, and apply safe procedures during ground and flight operations.

Sample Practice Questions

Review a selection from this exam's published US Practice Tests practice bank.

Question 1

An airship's engine-driven propeller produces thrust. Which statement best describes how thrust contributes to flight?

  1. AIt directly increases the lifting gas's buoyancy
  2. BIt provides forward force that can help the airship move through the air
  3. CIt reduces the airship's weight
  4. DIt prevents changes in the airship's altitude
Show answerCorrect answer: B

Thrust is a propulsive force that moves the airship through the surrounding air. It does not directly change the lifting gas's buoyancy or the vehicle's weight.

Question 2

What is the main role of an airship's altimeter setting in relating indicated altitude to local conditions?

  1. AIt adjusts the instrument reference so indicated altitude is more representative of altitude above mean sea level
  2. BIt corrects the compass for engine interference
  3. CIt shows the airship's speed over the ground
  4. DIt measures envelope pressure directly
Show answerCorrect answer: A

Setting the altimeter to the appropriate local pressure reference allows the instrument to indicate altitude referenced to mean sea level under standard assumptions. The setting does not measure envelope pressure or groundspeed.

Question 3

Why should an airship pilot account for the effect of temperature on the lifting gas during flight planning?

  1. AHeating the gas generally increases its volume and can change the airship's lift and pressure-management needs
  2. BHeating the gas always increases the density of the surrounding air
  3. CTemperature has no effect on gas volume when an envelope is flexible
  4. DHeating the gas directly increases the aircraft's engine power
Show answerCorrect answer: A

Gas expands as its temperature rises, subject to the airship's design and operating limits. This can affect buoyancy and envelope pressure, so temperature changes must be considered in planning and operation.

Question 4

In the United States, what does a steady green light signal from the control tower to an aircraft on the ground generally mean?

  1. ACleared for takeoff
  2. BStop
  3. CReturn for landing
  4. DTaxi clear of the runway
Show answerCorrect answer: A

Under standard U.S. light-gun signal meanings, a steady green light to an aircraft on the ground means cleared for takeoff. Pilots must still comply with applicable instructions and procedures.

Question 5

When an airship's engine is producing thrust, what general effect can propeller slipstream have on nearby control surfaces?

  1. AIt can increase airflow over a surface and affect its control response
  2. BIt eliminates the need to use the rudder
  3. CIt makes the control surfaces ineffective at every airspeed
  4. DIt changes the lifting gas into a denser gas
Show answerCorrect answer: A

Propeller slipstream is accelerated airflow behind a propeller. Depending on installation and power, it can increase local airflow over nearby control surfaces and influence their effectiveness, including when the aircraft's forward speed is low.

Question 6

During passenger briefing, which instruction is especially important for safe movement around an operating airship?

  1. AStay clear of propellers and follow crew directions around the aircraft
  2. BApproach the airship from any direction while the engines are running
  3. CHandle control lines to learn how they work
  4. DStand beneath the envelope during launch
Show answerCorrect answer: A

Passengers should remain clear of propellers and other hazards and follow crew instructions. Airship ground operations can involve moving equipment, lines, and aircraft components.

Question 7

Why should an airship pilot monitor the relationship between indicated airspeed and groundspeed during a flight?

  1. AIt establishes the lifting-gas purity
  2. BIt helps identify the effect of wind on movement over the ground
  3. CIt measures the remaining fuel directly
  4. DIt confirms that the envelope is at maximum pressure
Show answerCorrect answer: B

Airspeed describes motion relative to the surrounding air, while groundspeed describes motion relative to the surface. Their difference reflects the wind's effect on progress over the ground.

How to use this practice test

The free practice session draws up to 20 random questions from the 50-question SPL bank. Submit your answers to see results after the session, then use missed items to identify concepts that need another review, such as altimeter settings, lifting-gas temperature effects, or airport light signals.

Preparation tips

  • Explain how a change in lifting-gas temperature can affect buoyancy, and connect that effect to flight planning decisions.
  • Practice distinguishing indicated airspeed from groundspeed and identify what each tells you about the airship’s motion.
  • Review standard tower light-gun signals, especially the meanings of steady signals for aircraft on the ground.
  • Trace how engine power and propeller slipstream may affect nearby control surfaces, and review safe passenger movement around an operating airship.
Official sourceOfficial exam page ↗