| True - False |
| 1. |
An hour meter attached to the engine records the operating time of the engine.
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| 2. |
In the turbine assembly, the shaft is supported by a forward ball bearing and an aft roller bearing.
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| 3. |
The OVSP light on the instrument panel goes on when the horsepower reading reaches 70 percent.
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| 4. |
Both models of the T62 invariably burn JP-4 gasoline.
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| 5. |
Lubrication system pressure is maintained at 15 to 25 psi by a pressure relief valve.
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Cluster True - False
Each of the following groups of questions is related to the statement that precedes them.
FIRST GROUP
The T62 electrical system supplies power for the ignition and engine electrical accessories. Evaluate the following statements by marking them True or False.
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| 6. |
The spark plug used for ignition operates all the time the engine is running.
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| 7. |
The speed switch is actually two switches in one housing.
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| 8. |
The ignition exciter converts input current to an intermittent high-energy current.
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| 9. |
All current in the APU is dc.
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| 10. |
A switch shuts the engine down if the exhaust is too hot.
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| 11. |
The tachometer generator and the speed switch are mounted on the accessory drive assembly.
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SECOND GROUP
In a description of the T62 APU, you find the following information.
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| 12. |
The T62 APU is an item of ground support equipment.
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| 13. |
It has its own hydraulic starter motor.
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| 14. |
Each model of the T62 has different temperature limits.
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| 15. |
The T62T-2A has a higher input speed than the T62T-16A.
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| 16. |
It develops approximately 70 shaft horsepower.
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| 17. |
Its compressor and turbine rotor are mounted back-to-back on a single shaft.
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THIRD GROUP
Which of the following information about the T62 fuel system is correct?
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| 18. |
The flyweight assembly in the governor housing allows a small amount of fuel to flow at all times.
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| 19. |
For combustion, atomized fuel from the start fuel nozzle is ignited by the spark plug.
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| 20. |
As compressor pressure increases, so does fuel flow to the main fuel injectors.
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| 21. |
Fuel flow to the fuel injectors is not affected by ambient air pressure.
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| 22. |
When the fuel pressure switch opens, it actuates the mechanism to start the engine.
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FOURTH GROUP
About the operation of the T62, the reference text tells you that: |
| 23. |
During starting, when the hydraulic starter rotates the compressor, air is drawn into the engine inlet.
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| 24. |
The start fuel solenoid valve is opened when the speed of the APU reaches 75%.
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| 25. |
Power for the reduction drive assembly comes directly from the compressor.
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| 26. |
Fuel from the start fuel nozzle is ignited by a spark plug.
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| 27. |
Fuel goes into the combustor through six vaporizer tubes.
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FIFTH GROUP
If any of the APU operating limitations are exceeded, protective devices shut the APU down. |
| 28. |
An overspeed switch is set at 110 percent.
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| 29. |
When the instrument panel "Low Oil Press" light comes on, the pilot must switch off the APU immediately.
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| 30. |
Oil pressure must be more than 6 psi.
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| 31. |
If the APU shuts off, the cockpit control switch must be moved to the STOP position before restarting the engine.
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| 32. |
The overspeed switch shuts off the engine fuel flow.
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| 33. |
The pilot shuts off the APU when the instrument panel OVSP light turns on.
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