III.B.K5 Flashcards
- The blending of blades and vanes in a turbine engine?
Should be performed parallel to the length of the blade using smooth contours to minimize stress points.
- Which of the following may be used to mark turbine engine components exposed to high temps?
Layout dye.
- When starting a turbine engine, a hung start is indicated if the engine?
Fails to reach idle RPM.
- What must be done after the FCU has been replaced on an aircraft gas turbine engine?
Retrim the engine.
- If during inspection ar engine overhaul, ball or roller bearings are found to have magnetism but otherwise have no defects, they?
Must be degaussed before use.
- Who establishes the recommended operating TBO of a turbine engine used in general aviation?
The engine manufacturer.
- Welding and straightening of turbine engine rotating airfoils doesn’t require special equipment. Same is commonly recommended by the manufacturer.
Neither are true.
- Turbine engine components exposed to high temps generally may not be marked with?
Wax, grease pencil, or a graphite lead pencil.
- Who establishes mandatory replacement times for critical components of turbine engines?
The engine manufacturer.
- Where do stress rupture cracks usually appear on turbine blades?
Across the leading or trailing edge at a right angle to the edge length.
- When the leading edge of a 1st stage turbine blade is found to have stress rupture cracks, which of the following should be suspected?
Overtemp condition.
- Turbine blades are generally more susceptible to operating damage than compressor blades because of?
Exposure to high temps.
- The recurrent ingestion of dust or other fine airborne particulates into a turbine engine can result in?
Erosion damage to the compressor and turbine sections.
- Jet engine turbine blades removed for detailed inspection must be reinstalled in?
The same slot.
- When aircraft turbine blades are subjected to excessive heat stress, what type of failures would you expect?
Stress rupture.
- Compressor field cleaning on turbine engines is performed primarily in order to?
Prevent engine performance degradation, increased fuel costs, and damage or corrosion to gas path surfaces.
- Hot section inspections for many modern turbine engines are required?
On a time or cycle basis.
- What should be done initially if a turbine engine catches fire when starting?
Turn off the fuel and continue engine rotation with the starter.
- A weak fuel to air mixture along with normal airflow through a turbine engine may result in?
A lean die out.
- Which of the following is a good indication of a malfunctioning fuel nozzle when inspecting the exhaust section of an aircraft turbine engine?
Hotspots on the tail cone.
- Anti icing of jet engine air inlets is commonly accomplished by?
Engine bleed air ducted through the critical areas.
- The procedure for removing the accumulation of dirt deposits on compressor blades is called?
Field cleaning.
- Which of the following may be used to accomplish internal inspection of an assembled turbine engine?
A borescope.
- What is the possible cause when a turbine engine indicates no change in power setting parameters, but oil temp is high?
Engine main bearing distress.
- A turbine engine hot section is particularly susceptible to which kind of damage?
Cracking.
- Dirt particles in the air being introduced into the compressor of a turbine engine will form a coating on all but which of the following?
Turbine blades.
- Severe rubbing of turbine engine compressor blades will usually cause?
Galling.
- Continued and/or excessive heat and centrifugal force on turbine engine rotor blades is likely to cause?
Creep.
- What term is used to describe a permanent and cumulative deformation of the turbine blades of a turbojet engine?
Creep.
- Accumulation of contaminants in the compressor of a turbojet engine reduces aerodynamic efficiency of the blades. 2 common methods for removing dirt deposits from turbojet engine compressor blades are a fluid wash and an abrasive grit blast.
Both are true.
- Hot spots in the combustion section of a turbojet engine are possible indicators of?
Malfunctioning fuel nozzles.
- Which of the following can cause fan blade shingling in a turbofan engine?
Engine overspeed and/or FOD.
- Compressor stall is caused by?
A high AoA airflow through the 1st stages of compression.
- A condition known as hot streaking in turbine engines is caused by?
A partially clogged fuel nozzle.
