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Flashcards in General Chapter 11 Deck (8)
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1

Describe the steps involved in a dye penetrant inspection.

The surface is cleaned, and then penetrant is applied and allowed to dwell for a specified time. The penetrant is then removed with an emulsifier or cleaner. Once removed, the part is dried and then developer is applied. The results are then inspected and interpreted.

2

Name some tools that are commonly used to assist in making visual inspections of welds.

A magnifying glass, flashlight, mirror and, possibly, a bore-scope.

3

What are some of the non-destructive testing methods that may be used on aluminum parts?

visual, dye penetrant, eddy current, ultrasonic testing and radiography.

4

What process occurs during the preparation stage of a dye penetrant inspection when the penetrating liquid is applied, and then removed from a cracked part?

The penetrant enters the crack by capillary action and remains there until made visible by the developer.

5

A correctly made butt weld will have what bead width and how much penetration?

The bead width should be 3 to 5 times the thickness of the base metal and there must be 100% penetration.

6

What telltale characteristics are evidence of a cold weld?

A cold weld has rough, irregular edges that are not feathered into the base metal and has variations in penetration amounts.

7

The penetration of a fillet weld should be what percentage of the thickness of the base metal?

25 to 50 percent.

8

Describe the basic steps for conducting a magnetic particle inspections.

Magnetize the part, then coat the surface with ferromagnetic particles. If a defect or discontinuity is present, the particles align with the discontinuity forming a visible pattern.