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FAA Flight Engineer Turboprop (Basic) Knowledge Test Practice Test

The FET practice material covers turboprop engine principles and aircraft systems relevant to flight-engineer knowledge. Its sample questions address how the compressor, combustion section, power turbine, and propeller contribute to propulsion, alongside engine indications, electrical generation, ignition, and pressurization.

Exam overview

Exam providerFederal Aviation Administration
Exam codeFET
CategoryAviation

About the FAA Flight Engineer Turboprop (Basic) Knowledge Test Exam

Working with these concepts involves distinguishing the functions of gas-turbine sections and understanding how engine output is represented by indications such as torque and temperature. Flight engineers need to recognize when a reading exceeds an operating limit and respond in accordance with the aircraft’s approved procedures. Related system knowledge includes generator or alternator operation, magneto ignition, thermocouple-based temperature sensing, and cabin pressure control through the outflow valve. Questions about inlet cleanliness and shutdown procedures connect component knowledge to safe aircraft operation. These topics support interpreting system behavior, identifying abnormal indications, and understanding why prescribed operating steps matter; the practice-bank examples are not a statement of official test coverage.

Sample Practice Questions

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

Question 1

In a turboprop engine, what does the power turbine primarily do?

  1. AIt extracts energy from the hot gas flow to drive the propeller through the reduction drive
  2. BIt meters fuel into the combustion chamber
  3. CIt compresses air before it enters the combustor
  4. DIt directs cabin air to the environmental control system
Show answerCorrect answer: A

The power turbine extracts energy from the expanding combustion gases and delivers shaft power to the propeller drive. The compressor and fuel-metering functions are performed by other engine components.

Question 2

What is the main function of an aircraft electrical generator or alternator while the engine is operating?

  1. ATo supply electrical power to aircraft loads and replenish the battery
  2. BTo regulate cabin pressure directly
  3. CTo circulate engine lubricating oil
  4. DTo control the aircraft’s aerodynamic trim
Show answerCorrect answer: A

A generator or alternator converts mechanical power into electrical power for aircraft systems and, when conditions permit, recharges the battery.

Question 3

In a gas-turbine engine, what is the principal function of the compressor?

  1. ATo extract torque from the exhaust stream
  2. BTo raise the pressure of air entering the combustor
  3. CTo cool the propeller blades
  4. DTo meter oil to the bearings
Show answerCorrect answer: B

The compressor raises the pressure of incoming air so that combustion can occur effectively in the combustor. The compressed air also supports the engine’s overall gas flow.

Question 4

During a climb, a turboprop’s indicated torque rises above the published operating limit. What is the appropriate general response?

  1. AReduce power as directed by the approved aircraft procedure and monitor the indication
  2. BIncrease propeller blade angle to make the torque indication decrease
  3. CIgnore the indication if the exhaust temperature is normal
  4. DContinue climbing until the torque returns to its previous value
Show answerCorrect answer: A

Torque limits protect the engine and propeller drivetrain. The crew should respond using the aircraft’s approved procedure rather than relying on another indication or assuming the value will correct itself.

Question 5

What is the purpose of a thermocouple in an engine temperature-indicating system?

  1. ATo produce an electrical signal related to temperature
  2. BTo measure fuel quantity by buoyancy
  3. CTo mechanically change propeller pitch
  4. DTo remove moisture from compressor air
Show answerCorrect answer: A

A thermocouple uses the voltage produced at the junction of dissimilar conductors to provide a signal related to temperature. An indicating system uses that signal to display the measured temperature.

Question 6

What is the basic function of an aircraft magneto ignition system?

  1. ATo generate and distribute high-voltage ignition energy to the engine spark plugs
  2. BTo measure exhaust-gas temperature
  3. CTo pump fuel from the tanks to the engine
  4. DTo control the aircraft’s cabin pressurization
Show answerCorrect answer: A

A magneto is an engine-driven ignition source that produces electrical energy for the spark plugs. It is distinct from the aircraft’s fuel, temperature-indicating, and cabin-pressure systems.

Question 7

Why is it important to follow the aircraft’s approved procedure when shutting down a turboprop engine?

  1. AThe procedure helps manage engine cooling and safely secure fuel and electrical systems
  2. BIt guarantees that the propeller will remain at a particular blade angle in every condition
  3. CIt removes the need for post-flight inspections
  4. DIt increases the engine’s rated power for the next flight
Show answerCorrect answer: A

Shutdown procedures are designed for the specific aircraft and engine. They help avoid improper thermal conditions and ensure associated fuel, electrical, and other systems are placed in the intended state.

How to use this practice test

The free practice session presents up to 20 randomly selected questions from the 50-question FET bank. Answer them to check your understanding of turboprop engine components, indications, and related aircraft systems; results appear after the session so you can identify concepts to revisit.

Preparation tips

  • Trace airflow and energy transfer through the compressor, combustion section, turbine, and propeller, noting each component’s role in producing thrust.
  • Review what torque and engine-temperature indications measure, and connect thermocouple operation to the temperature information shown to the crew.
  • Practice identifying an exceedance, such as torque above a published limit, and explain why the applicable aircraft procedure governs the response.
  • Compare the functions of the generator or alternator and magneto ignition system, including when each contributes to aircraft or engine operation.
  • Explain how an outflow valve controls cabin pressure and why keeping a turbine-engine inlet clear of foreign objects protects the engine.
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