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Flashcards in Nondestructive Testing Deck (8)
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1
Q

Describe the steps involved in a dye penetrant inspection.

A

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
Q

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

A

A magnifying glass, flashlight, mirror, and possibly a boroscope.

3
Q

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

A

Visual, dye-pen, eddy current, ultrasonic testing, and radiography.

4
Q

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

A

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

5
Q

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

A

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

6
Q

What telltale characteristics are evidence of a cold weld?

A

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

7
Q

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

A

25 to 50 percent.

8
Q

Describe the basic steps for conducting a magnetic particle inspections.

A

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.