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22 Cards in this Set
- Front
- Back
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What are the two basic sections of a turbine engine? |
hot section and cold section. |
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What are the two basic types of compressors that are used in aircraft turbine engines?
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Axial–flow and centrifugal.
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What is the purpose of the stators in an axial–flow compressor?
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The stators convert velocity energy into pressure energy and change the direction of the air. |
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What are three types of combustors used on aircraft turbine engines?
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Can–type
Annular–type
Can–annular–type. |
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How many igniters are there normally in an aircraft turbine engine?
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Two
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What is the main purpose of the turbine nozzle in an aircraft turbine engine?
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turbine nozzle directs hot gases as they leave the combustor. |
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What is meant by a free–turbine turboshaft engine?
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A free turbine drives the propeller in a turboprop or the transmission of a helicopter. |
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What kind of bearings are used to support the rotor shaft of an aircraft turbine engine?
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Anti–friction roller bearings |
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Where can you find the limits of repair allowed for the compressor blades of an aircraft turbine engine? |
Engine maintenance manual |
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Why is it important that a turbojet engine be allowed to cool before it is shut down after it has been operated at a high power setting?
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the shroud around the turban wheel can contract and seize. |
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What is meant by a hung start in a turbine engine?
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Ignition occurs, but the engine does not accelerate to a self–sustaining speed. |
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What is meant by a hot start in a turbine engine?
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Ignition occurs, but the internal temperatures go high enough that they can damage the engine. |
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What is meant by creep of the turbine blades?
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A condition of permanent elongation of the turbine blades. |
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How is the compressor of a turbine engine cleaned? |
An cleaner or mild abrasive is sprayed through the engine while it is being motored or operated at a low speed. |
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Where is water injected into a turbine engine for cooling purposes? |
Into the compressor inlet and the engine diffuser case. |
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At what point in a turbine engine is the temperature the highest? |
At the inlet to the high–pressure turbine. |
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What are two types of thrust reversers that are used on turbojet engines?
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Mechanical blockage–type Aerodynamic blockage–type. |
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What is meant by trimming a turbojet engine?
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Adjusting the fuel control to get the correct idling and maximum–thrust RPM. |
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What is meant by a hot–section inspection?
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Inspection the hot section which includes the combustors, turbine, and the exhaust system
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What is meant by on–condition maintenance of a turbine engine? |
The monitoring of the engine performance at regular intervals and determining when maintenance is required through the manufacturer. |
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What checks of a turbine engine are necessary to verify preflight condition? |
–Inspection of all air inlet areas –Check for unusual noise when the compressor is rotated. |
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What type of equipment should be used to determine that a turbine engine is performing up to the standard specified by the engine manufacture? |
A JetCal Analyzer/Trimmer |
