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20 True/False questions

  1. What type of oil sump does the TPE 331 use?Sinplex nozzles in conjunction with a flow divider

          

  2. Hydromechanical torque system- Measures torque using gear reduction and strain gauges
    - Requires special tester to calibrate
    - More reliable than hydromechanical
    - With strain gauges: compression decreases resistance, while tension increases resistance

          

  3. What is a major downfall of the TPE 331It is difficult to start in cold climates since it is fixed shaft

          

  4. When is water-methanol injection activated?It is built up of multiple components connected by curvic couplings

          

  5. What must be done before doing a compressor wash on the TPE 331Make sure the bleed air control solenoid is closed

          

  6. TPE 331 propertiesWhen an engine is restricted in the amount of hp that it uses depending on the airframe it is in

          

  7. Why does the TPE 331 use centrifugal compressors?A sonic venturi

          

  8. Are maintenance runs counted as cycles?- Measures torque using gear reduction and strain gauges
    - Requires special tester to calibrate
    - More reliable than hydromechanical
    - With strain gauges: compression decreases resistance, while tension increases resistance

          

  9. What is flat rating?- Fixed turbine
    - 575 hp to 1100 hp
    - 2 stage centrifugal compressor
    - Annular combustion chamber
    - 3 stage axial turbine

          

  10. What does the TPE 331 use to limit bleed air output?A sonic venturi

          

  11. How does the TPE 331 drain excess fuel?It is built up of multiple components connected by curvic couplings

          

  12. How is the turbine shaft constructed?Through the fuel nozzles into a scupper

          

  13. Why does the 1st stage turbine wheel have larger tip clearances?- Most efficient at high speed
    - More resilient toward FOD

          

  14. What may happen if excess fuel is left in the burner can?Sinplex nozzles in conjunction with a flow divider

          

  15. SRL- Fixed turbine
    - 575 hp to 1100 hp
    - 2 stage centrifugal compressor
    - Annular combustion chamber
    - 3 stage axial turbine

          

  16. What indicates that the oil filter has entered bypass?Through the fuel nozzles into a scupper

          

  17. TPE 331 possible torque systems- Hydromechanical
    - Planetary gear

          

  18. What is the purpose of the 2 rows of fuel nozzles?One row is the start nozzles and the other row is the run nozzles

          

  19. Planetary gear torque system- Measures twist between shafts using helical cut gear and pilot valve
    - If the oil filter is in bypass, it will cause erroneous torque readings
    - Problems with the hydromechanical system are almost always found in the oil system
    - Can be tested using a deadweight tester or calibrated air pressure

          

  20. What type of fuel nozzles does the TPE 331 use?Sinplex nozzles in conjunction with a flow divider