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MPI > Self Assessment Questions > Flashcards

Self Assessment Questions Flashcards

1
Q

What is the TOTAL wavelength range of an ultraviolet light?

A

4 nm to 400 nm

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2
Q

What is the wavelength range of a black light?

A

320 nm to 400 nm

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3
Q

When using conventional means, what is the most detectable magnetic field?

A

Longitudinal

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4
Q

What would be an advantage of the dry method over the wet method?

A

It can be easier to use for field inspection with portable equipment

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5
Q

If one inch and two inch diameter bars were magnetized by passing the same current through them, describe the magnetic field in relation to each other.

A

It would be the same for both

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6
Q

What is the size of most dry powder magnetic particles used in general flaw detection?

A

A mixture of sizes and shapes

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7
Q

What is a defect caused by thin plates of metal folding on the surface of the forging and not bonding to it?

A

Forging lap

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8
Q

What is a ‘’V’’ shaped internal rupture produced during extrusion when the interior of the metal does not flow as rapidly as the surface?

A

Cupping

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9
Q

What is a forging crack or rupture produced when the metal is worked at improper temperature and/or the reduction of section is too severe?

A

Burst

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10
Q

What is a processing defect caused by large porosity or pipe flattened and spread out during rolling?

A

Lamination

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11
Q

What is a crack that may be found in a forging due to improper trimming of the flash?

A

Flash line tear

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12
Q

What is a processing defect caused by surface cracks that are stretched out and lengthened during the rolling operation of a bar?

A

Seam

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13
Q

What is a processing defect caused by inclusions that have been elongated in the direction of working?

A

Stringers

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14
Q

What is a short, internal fissure caused by stress and decreased solubility of hydrogen during rapid cooling after hot working?

A

Hydrogen flake

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15
Q

Segregation is considered what type of process discontinuity?

A

Inherent

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16
Q

Failure to remove the shrink cavity that forms at the top of an ingot will results in voids called what in the finished product?

A

Pipe

17
Q

What is a crack like indication formed prior to completion of solidification of the casting because of restricted contraction?

A

Hot tear

18
Q

What is the phenomenon called that results when one or more alloying elements are not properly diffused?

A

Segregation

19
Q

What is a discontinuity caused by dissolved gases in the molten metal that become trapped in the solid casting?

A

Porosity

20
Q

What are particles of foreign material such as sand or slag that are embedded in the cast metal called?

A

Inclusions

MPI (9 decks)

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