Question 8Gas Turbine - 1st Asst/Chief
70% to passWhen conducting a borescope inspection of the compressor, why can airfoil and tip cracks be difficult to detect?
ARotating the rotor too fast.
BBorescope optics have deteriorated.
CThe cracks are generally tight and shallow in depth.
DAll of the above.
AI Explanation
The correct answer is D) All of the above. Airfoil and tip cracks in the compressor can be difficult to detect during a borescope inspection for the following reasons: 1. Rotating the rotor too fast can make it challenging to properly inspect the compressor blades and identify any cracks. 2. If the borescope optics have deteriorated, the image quality may be poor, making it harder to spot small, tight cracks. 3. The cracks are generally tight and shallow in depth, making them difficult to detect even with a well-functioning borescope. Therefore, all of the listed factors can contribute to the difficulty in identifying airfoil and tip cracks during a borescope inspection of the compressor.
Related Questions
Q85:How many fuel igniters would be installed on the marine gas turbine engine shown... Q45:During an operation of a main propulsion gas turbine, the engine shuts down. Whi... Q21:A compressor blade platform that is tilted or raised may indicate which of the f... Q16:Once a compressor is broken in, which of the following factors will most likely ... Q52:Assuming you maintain the same power output, how will a decrease in the compress...
Ready to test your knowledge?
Take a Gas Turbine - 1st Asst/Chief Practice ExamOfficial Resources