Inspection Concepts and Techniques Flashcards
What are different types of micrometer calipers?
Outside micrometer, inside micrometer, depth micrometer, and thread micrometer.
How often should torque wrenches be calibrated?
Depending on the tool, some are calibrated every 6 months, while others are calibrated every 12 months.
What is the proper type of nondestructive inspection to use for locating surface cracks in an aluminum alloy casting or forging?
Fluorescent or visual dye penetrant.
What is the principle upon which ultrasonic inspection is based?
Any fault withing material will change the material’s resonant frequency. Comparing the resonant frequency of a known sound material with the material under test will indicate the presence of a fault.
What is the procedure when making a dye penetrant inspection of a part?
Clean the part thoroughly, apply the penetrant, and allow it to soak for the recommended dwell time. Remove all of the penetrant from the surface and apply the developer.
In addition to 100-hour and annual inspections, where would an aircraft operator fund the approved inspection programs for an aircraft?
In the manufacturer’s maintenance manual and Instructions for continued Airworthiness (ICA).
What inspection method would be most appropriate for checking a nonferrous metal part for intergranular corrosion?
Eddy current inspection.
What inspection method would be most appropriate for checking the internal structure of an airplane wing for corrosion?
X-ray inspection.
What inspection method would be most appropriate for checking a steel landing gear component for stress cracks?
Magnetic particle inspection.
What type of inspection is best suited for detecting a fault withing a piece of nonferrous metal?
Ultrasonic inspection.
Why is it important that all parts be thoroughly cleaned before they are inspected by the dye penetrant method?
Any grease or dirt in a fault will keep the penetrant from seeping into the fault.
What is the procedure to use when performing a magnetic particle inspection of a part?
Thoroughly clean the part, magnetize it as directed by the appropriate service manual, flow the indicating medium over the surface, and inspect it under a “black light”. When the inspection is complete, thoroughly demagnetize the part.
Why is it necessary to magnetize a part both circularly and longitudinally when inspecting a steel part by the magnetic particle method?
To detect faults that extend across as well as lengthwise within the part.
Does circular magnetization detect faults that are across or lengthwise to the part?
Lengthwise.
Why is it important that all engine parts that have been inspected by the magnetic particle method be completely demagnetized?
If the parts are not completely demagnetized, they will attract steel particles that are produced by engine wear and will cause damage to bearing surfaces.
