| True-False
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| 1. |
The T700-GE-700 is being developed for use in the heavy lift helicopter.
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| 2. |
The T63-A-700 engine is used on the CH-54 helicopter.
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| 3. |
On the T73, the torque sensor measures the amount of power transmitted from the engine to the main rotor gearbox.
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| 4. |
Airflow in the T74 is straight through the engine, with no reverse turns.
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| 5. |
The T63 TOT thermocouple assembly is a harness with four probes.
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| 6. |
The exhaust duct is bolted to the free-turbine case in the T73 engine.
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Cluster True-False
Each of the following groups of questions is related to the statement that precedes them.
FIRST GROUP
Evaluate the following statements about the T63 systems by marking them true or false.
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| 7. |
During start, acceleration, and stabilization at ground idle rpm, fuel flow is metered entirely by the fuel control (N1).
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| 8. |
The lubrication system uses an oil mist on compressor, gas producer turbine, and power turbine rotor bearings.
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| 9. |
The gas producer fuel control and the power turbine governor are not connected to each other.
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| 10. |
The air bleed system is controlled by a valve which begins to close when a specific pressure ratio is reached.
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| 11. |
Torsional vibrations in helicopter rotor systems are dampened by the check valve assembly and accumulator.
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| 12. |
In the lubrication system, a check valve in the oil filter outlet passage keeps oil in the tank from draining into the engine.
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| 13. |
If one of the two fuel pumps fails, the engine shuts down.
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SECOND GROUP
Among the details on the T74 engine, you find that:
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| 14. |
The glow-plug ignition system is for quick starts at low ambient temperature.
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| 15. |
Both pumps in the scavenge oil system are externally mounted.
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| 16. |
The heat exchanger uses heat from the oil lubricating system to preheat the fuel in the engine fuel system.
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| 17. |
The oil tank must be drained before changing the oil filter.
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| 18. |
One of the T74's turbines drives a compressor in the gas generator section, and the other drives a reduction gearing.
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| 19. |
The reduction gearbox is at the front of the engine, and the accessory gearbox is at the rear of the engine.
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| 20. |
The compressor turns in a clockwise direction and the power turbine shaft turns in a counterclockwise direction.
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| 21. |
The fuel-air mixture in the combustion chamber liner is ignited by fourteen simplex nozzles.
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THIRD GROUP
Basic to your knowledge of gas turbine engines should be enough information about the T73 systems to evaluate the following statements.
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| 22. |
The ignition system constitutes the entire engine electrical system.
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| 23. |
Scavenge oil from the main bearings and gearbox empties into a common tube that returns it to the tank.
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| 24. |
Fuel goes from the fuel pump directly to the right and left fuel manifolds.
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| 25. |
An external tube on the left side of the engine carries hot anti-icing air forward to the compressor.
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| 26. |
All pressure oil lines in the lubrication system are internal.
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FOURTH GROUP
About the two T63 engines, the text tells you that: |
| 27. |
The lubrication system has one magnetic chip detector plug in the accessory gearbox sump and one in the scavenge oil pressure line.
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| 28. |
The gas producer and power turbine gear trains are both contained in the accessory gearbox section.
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| 29. |
The T63-A-5A is the one used on the OH-58 helicopter.
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| 30. |
Both the power turbine and the gas producer turbine rotate at the same speed.
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| 31. |
The T63 compressor must not be cleaned with ordinary cleaning solvents, because they would dissolve the plastic coating on the inside.
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FIFTH GROUP
In the T73 engine: |
| 32. |
The main pumping element raises the fuel pressure by approximately 20 psi.
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| 33. |
The gas producer rotor and the power turbine rotor turn in opposite directions.
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| 34. |
Stages 5 through 9 of the compressor rotor shroud and vane assembly are housed in the diffuser case.
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| 35. |
The accessory drive gear is in the gas producer turbine rotor assembly.
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| 36. |
One duplex fuel nozzle matches each of the combustion chambers.
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| 37. |
High-pressure air for anti-icing and fuel heating is bled off from the compressor inlet case.
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