Aircraft Engine Systems Quiz
48 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the maximum ambient temperature allowed for operating engine anti-ice during ground operations?

  • 10° C
  • 15° C
  • 0° C
  • 5° C (correct)

    • During the start phase, which solenoid is energized to prevent fuel flow through the oil-to-fuel heat exchanger?

  • Enrichment solenoid
  • Anti-ice solenoid
  • Lockout solenoid (correct)
  • Bypass solenoid

    • At what RPM does the enrichment solenoid become de-energized, allowing the anti-ice lockout valve to reopen?

  • 10% RPM
  • 70% RPM
  • 30% RPM
  • 55% RPM (correct)

    • What temperature must be reached for the anti-ice valve to open and allow warm fuel to mix with inlet fuel?

    <p>40° F</p> Signup and view all the answers

    What does the P2 probe measure in the aircraft engine system?

    <p>Total air pressure</p> Signup and view all the answers

    What is used to prevent the P2 probe from icing over?

    <p>Hot air from the compressor</p> Signup and view all the answers

    What initiates the expansion of the fluid in the T2 sensor when air temperature increases?

    <p>Thermal expansion</p> Signup and view all the answers

    What component adjusts the metered fuel based on pressure sensed by the P2 probe?

    <p>Bellows mechanism</p> Signup and view all the answers

    What role does the under-speed fuel governor play during beta mode operation?

    <p>It controls the amount of fuel supplied to the engine.</p> Signup and view all the answers

    When is the fuel shut-off valve energized to the 'fuel ON' position?

    <p>At approximately 10% engine speed during the start cycle.</p> Signup and view all the answers

    How can the fuel shut-off valve be manually closed during an engine shutdown?

    <p>By positioning the engine speed lever to the shut-off position.</p> Signup and view all the answers

    What happens to the fuel flow divider as the engine accelerates?

    <p>It causes the secondary port to open due to increased differential pressure.</p> Signup and view all the answers

    What is the function of the primary manifold assembly in the fuel system?

    <p>To connect the five fuel nozzles to the primary side of the fuel flow divider.</p> Signup and view all the answers

    What electrical action is required to move the fuel shut-off valve to the 'fuel OFF' position?

    <p>Placing the start/stop switch in the stop position.</p> Signup and view all the answers

    Which component is located downstream of the FCU on the left-hand side of the engine?

    <p>The fuel shut-off valve.</p> Signup and view all the answers

    What must be done to reopen the fuel shut-off valve electrically after it has been closed manually?

    <p>Move the engine speed lever back to the low position.</p> Signup and view all the answers

    What is the primary function of the primary nozzles during engine start?

    <p>To provide fuel atomisation</p> Signup and view all the answers

    What component must be manually actuated to add fuel to the starting sequence?

    <p>Enrich button</p> Signup and view all the answers

    Where are the secondary nozzles located in relation to the turbine plenum?

    <p>Spaced around the rear of the turbine plenum</p> Signup and view all the answers

    What happens to the pressure-regulated fuel during engine start?

    <p>It bypasses the fuel control unit</p> Signup and view all the answers

    What role does the air from the compressor discharge play in the anti-ice system?

    <p>It heats the inlet shield to prevent ice formation</p> Signup and view all the answers

    What is the purpose of the hot air flowing past the inlet housing of the engine?

    <p>To prevent ice from forming on the engine</p> Signup and view all the answers

    What is the location of the pressure regulator and solenoid valve in the engine fuel system?

    <p>On the right side of the reduction gear case</p> Signup and view all the answers

    Which component is responsible for discharging the heated air in the anti-ice system?

    <p>The nacelle area</p> Signup and view all the answers

    What should be done if a start attempt aborts due to excessive ITT?

    <p>Conduct a clearing or engine ventilation run before retrying.</p> Signup and view all the answers

    What is the consequence of exceeding the limits on RPM, torque, and temperature during engine starts?

    <p>It can reduce the life of bearings and hot section components.</p> Signup and view all the answers

    What should be done prior to every engine start to check for issues?

    <p>Hand crank the propeller to check for rotational freedom and unusual sounds.</p> Signup and view all the answers

    During the engine start, what action should be taken if the beta light goes out?

    <p>Wait momentarily until the beta light re-illuminates.</p> Signup and view all the answers

    What is the recommended cooling period before installing inlet and exhaust covers of the engine?

    <p>15 to 30 minutes.</p> Signup and view all the answers

    What is the effect of hand rotation of the engine post shutdown?

    <p>It limits peak post shut down engine temperature.</p> Signup and view all the answers

    What does the green arc on power plant instruments indicate?

    <p>Normal operating range.</p> Signup and view all the answers

    Which of the following practices ensures enhanced performance and maintenance cost reduction?

    <p>Careful engine operations within prescribed limitations.</p> Signup and view all the answers

    What is the critical speed range for the TPE 331 engine?

    <p>18% to 28% RPM</p> Signup and view all the answers

    Why should the engine be monitored closely during the starting sequence?

    <p>To avoid excessive vibrations in the critical range</p> Signup and view all the answers

    What does one engine cycle consist of?

    <p>Start, takeoff, landing, and shutdown</p> Signup and view all the answers

    What is the damage fraction for the 2nd stage turbine used in calculating equivalent cycles?

    <p>0.6</p> Signup and view all the answers

    Which station represents the discharge from the compressor section?

    <p>Station number 3</p> Signup and view all the answers

    What happens if an engine is allowed to dwell in the critical speed range during startup?

    <p>The engine may suffer immediate or cumulative damage</p> Signup and view all the answers

    Which station on the turbine engine corresponds to ambient conditions outside of the engine?

    <p>Station number 1</p> Signup and view all the answers

    How should engine runs for maintenance be counted in terms of cycles?

    <p>Not counted as a cycle</p> Signup and view all the answers

    What is the primary function of the Data Acquisition Unit (DAU)?

    <p>To collect and condition sensor data from aircraft systems</p> Signup and view all the answers

    How many channels does the DAU architecture utilize for processing?

    <p>Dual channel architecture</p> Signup and view all the answers

    What type of data does the DAU collect from the engines?

    <p>Discrete warning signals and analog sensor data</p> Signup and view all the answers

    What is the role of the ARINC 429 data bus in the DAU system?

    <p>To present conditioned data to compatible systems</p> Signup and view all the answers

    What happens at the startup of the EFIS system regarding the displays?

    <p>The pilot side displays EICAS 1 and the co-pilot side displays EICAS 2</p> Signup and view all the answers

    What power input range does the DAU accept for its independent power supplies?

    <p>10 to 32VDC</p> Signup and view all the answers

    In the event of a failure, how can pilots manually select the EICAS channel?

    <p>Via the Electronic Flight Information System (EFIS) menu</p> Signup and view all the answers

    What data does Channel #1 of both DAUs form?

    <p>EICAS 1 display data</p> Signup and view all the answers

    Study Notes

    Dornier 228 Aircraft and TPE-331 Engines

    • The Dornier 228-201/202/202K aircraft is powered by two Garrett TPE-331-5/5B-252D/TPE-331-5B-252D turbo-prop engines.
    • These engines feature advanced technology, offering superior fuel economy, rapid power response, variable propeller RPM, and simple operation.
    • Integral anti-icing, reverse thrust, and torque/ITT limiting systems are also included, along with minimal maintenance requirements.

    TPE-331 Engine Details

    • TPE-331 engines were manufactured by the Garrett Turbine Engine Company of the USA, beginning production in 1963.
    • TPE 331-5/5B-252D engines are known for their robustness and reliability due to their integral gearboxes, two-stage centrifugal compressors, three-stage axial turbines, and a single annular combustion chamber.
    • This design results in immediate and instantaneous power response.

    Leading Engine Particulars

    • Type: Single shaft TPE with integral gearbox
    • Direction of Rotation (DOR): Clockwise, viewed from the rear
    • Model number: TPE 331-5/5B-252D
    • Compressor Type: Two-stage centrifugal

    Engine Limitations

    • Absolute Altitude: 35,000 feet
    • Starting Altitude: Sea level to 20,000 feet
    • Ambient Air Temperature: Operating range is -54°C to 55°C, Starting range is 40°C to 55°C

    Fuel Capacity and Consumption

    • Fuel Capacity (DO-228-201): 2441 liters or 4252 lbs
    • Fuel Capacity (DO-228-202): 2895 liters or 5042 lbs
    • Fuel Consumption: Approximately 213 kg/hour or 500 lbs/hour
    • Oil capacity: 6.25 US quarts (5.9 liters)
    • Oil consumption: 0.1 US quarts (0.12 liters) per 12.5 hours.

    Model Identification

    • Engine model number is displayed on a nameplate attached to the gearbox.
    • The model for the DO-228 aircraft is TPE-331-5-252D.

    Engine Stations

    • Station 1: Ambient conditions external to the engine.
    • Station 2: Inlet to the compressor section.
    • Station 3: Compressor discharge.
    • Station 4: Inlet to the turbine section.
    • Station 5: Exhaust discharge downstream of the turbine section.

    Airflow Stations

    • P1: Ambient pressure
    • T1: Ambient temperature
    • P2: Compressor inlet pressure
    • T2: Compressor inlet air temperature
    • P3: Compressor discharge pressure
    • T3: Compressor discharge temperature
    • P4: Turbine inlet pressure
    • T4: Turbine inlet temperature
    • P4.1: 2nd stage turbine inlet pressure
    • T4.1: 2nd stage turbine inlet temperature
    • P4.2: 3rd stage turbine inlet pressure
    • T4.2: 3rd stage turbine inlet temperature
    • P5: Turbine discharge pressure
    • T5: Turbine discharge temperature

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Air Crew Propulsion PDF

    Description

    Test your knowledge on critical aircraft engine systems, focusing on anti-ice operations, solenoid functions, and fuel management. This quiz covers important components like the P2 probe, T2 sensor, and fuel shut-off valves. Perfect for aviation students and professionals looking to refresh their understanding of engine operations.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser