| True-False
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| 1. |
The T53 gas turbine engine includes an annular-flow path for the air or hot gases.
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| 2. |
The function of the diffuser is to increase air pressure in the area.
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| 3. |
The electric torquemeter is used on the T53-L-13 engine.
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| 4. |
The T53-L-701 has a single-stage power turbine.
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| 5. |
Besides cooling internal engine components, the internal cooling system pressurizes the No. 1, 2, and 3 bearing seals.
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| 6. |
The right side of the engine is determined by viewing the engine from the front.
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| 7. |
Varying the angle of the inlet guide vanes changes the N1 compressor speed.
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| 8. |
The reduction gearassembly in the T53-L-701 is smaller than that in the T53-L-13.
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Cluster True-False
Each of the following groups of questions is related to the statement that precedes them.
FIRST GROUP
In the discussion on the inlet housing assembly, your text tells you that:
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| 9. |
Split power gearing allows greater horsepower.
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| 10. |
Its sole purpose is to contain the components inclosed within it.
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| 11. |
The aft side of the No. 1 main bearing is completely sealed by a radial labyrinth seal.
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| 12. |
In the T53-L-701, power is transmitted to the propeller shaft by both the primary and secondary drive systems.
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| 13. |
In the T53-L-13 engine, the sun gear drives the output gearshaft directly.
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SECOND GROUP
Airflow through the engine shows how a gas turbine engine works. Which of the following statements about it are true and which false?
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| 14. |
When direction of airflow is reversed in the combustion area, air velocity and pressure increase.
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| 15. |
Vanes in the diffuser air passageway direct the air into the compressor section.
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| 16. |
In the combustion area, the air is used solely to aid combustion.
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| 17. |
After flowing through the two-stage power system, the gas passes through the exhaust diffuser passageway into the atmosphere.
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| 18. |
When air enters the combustion area, its flow direction is reversed.
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THIRD GROUP
Which of these is true of an accessory drive assembly?
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| 19. |
The N1 accessory drive gearbox assembly is mounted on the upper left side of the gearbox housing.
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| 20. |
Both the N1 and N2 assemblies receive their drive from the same kind of gear.
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| 21. |
The N1 has drive pads for the fuel control, the starter generator, and the gas producer tachometer generator.
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| 22. |
The N2 overspeed governor and tachometer drive assembly is on the underside of the engine inlet housing.
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| 23. |
The fuel control overspeed governor is driven by the N2 assembly.
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FOURTH GROUP
Evaluate the following statements about the torquemeter used on the L-13 model by marking them true or false. |
| 24. |
Because it uses engine oil, it is part of the lubrication system.
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| 25. |
Two circular plates make up the mechanical portion of the torquemeter.
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| 26. |
The stationary plate is attached to the reduction gear assembly.
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| 27. |
Air pressure does not affect torque indications in this particular torquemeter because the transmitter cancels the air pressure effect.
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| 28. |
The stationary and movable plates are separated by steel balls.
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FIFTH GROUP
Your text tells you which of the following about the operation of gas turbine engines? |
| 29. |
More of the gas energy from the combustion chamber is used by the power turbines than by the gas producer turbine.
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| 30. |
When N1 speed reaches 8 to 13 percent, main fuel flows into the combustion chamber.
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| 31. |
Combustion gases pass through the gas producer nozzle assemblies and next go to the blades of the power turbine rotor assemblies.
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| 32. |
The power turbine rotor assemblies are connected to the power shaft.
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| 33. |
The burning starting fuel ignites the main fuel in the combustion chamber after the fuel regulator valve opens.
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SIXTH GROUP
The compressor assembly is made up of five axial compressor rotor disks and one centrifugal impeller, with their housings. Evaluate the following statements about them. |
| 34. |
Roll pins and lock plates secure the compressor blades in dovetail slots in the rotor disks.
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| 35. |
Stators direct airflow to the following sets of rotating compressor blades; the fifth stator assembly has a row of exit guide vanes which direct airflow to the compressor impeller.
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| 36. |
Only one half of the compressor housing may be removed at one time because the housing is used for structural support.
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| 37. |
Stainless steel inserts are put between some stator vane rows to increase air velocity.
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| 38. |
The powershaft is attached inside the compressor rotor sleeve and rotates with it.
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| 39. |
Compressor bleed air flows through passages in the axial compressor housing.
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SEVENTH GROUP
About the combustor assembly on the T53, your text tells you that: |
| 40. |
It is located forward of the diffuser housing assembly.
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| 41. |
The turbine assembly includes the N1 assembly and the N2 assembly.
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| 42. |
The combustion chamber drain valve remains open throughout engine operation and closes at engine shutdown.
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| 43. |
No cooling air is needed in the exhaust diffuser.
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| 44. |
The combustion chamber housing is annular and is made of steel.
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| 45. |
The average temperature of the gas stream is measured in the turbine inlet area.
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