Vol.3 at University Of Maryland - University College | Flashcards & Summaries

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Lernmaterialien für Vol.3 an der University of Maryland - University College

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Current that is flowing through a circuit is measured in 

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Amperes 

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What do you use to detect differences between permeability variations and cracks? 


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Phase detection 

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Eddy current inspection can do all of the following except? 

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Detect all subsurface cracks 

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Effective depth of penetration is the depth in the inspection article at which the magnetic field strength or intensity of the induced eddy currents is reduced to what percent of the value at the surface? 

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5

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When a test coil is moved away from a part due to lift-off, magnetic coupling between the test coil and inspection part 


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is decreased 

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What effect do surface eddy currents, the secondary field, and depth of penetration have on poor conductivity? 


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Weaker surface eddy currents, weaker secondary field, and a greater depth of penetration. 

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Which mode of operation has two small sensing coils wound side-by-side in the shape of two back-to-back capital D’s? 

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Differential 

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Which type of eddy current coil has differential sensors that are directionally sensitive and provide detection of crack tips? 

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Conformal coil 

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What happens when an eddy current probe coil arrangement is closer to the test surface? 

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Small cracks can be detected due to greater sensitivity 

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Eddy current instruments must have all of these capabilities except? 

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Dependability

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What is used to detect disturbances in the magnetic field produced by passing an alternating current in a thin planar foil of doped yttrium iron garnet? 

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Magneto-optic imaging 

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What produces an alternating magnetic field in eddy current testing? 

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Probe

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Beispielhafte Karteikarten für deinen Vol.3 Kurs an der University of Maryland - University College - von Kommilitonen auf StudySmarter erstellt!

Q:

Current that is flowing through a circuit is measured in 

A:

Amperes 

Q:

What do you use to detect differences between permeability variations and cracks? 


A:

Phase detection 

Q:

Eddy current inspection can do all of the following except? 

A:

Detect all subsurface cracks 

Q:

Effective depth of penetration is the depth in the inspection article at which the magnetic field strength or intensity of the induced eddy currents is reduced to what percent of the value at the surface? 

A:

5

Q:

When a test coil is moved away from a part due to lift-off, magnetic coupling between the test coil and inspection part 


A:

is decreased 

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Q:

What effect do surface eddy currents, the secondary field, and depth of penetration have on poor conductivity? 


A:

Weaker surface eddy currents, weaker secondary field, and a greater depth of penetration. 

Q:

Which mode of operation has two small sensing coils wound side-by-side in the shape of two back-to-back capital D’s? 

A:

Differential 

Q:

Which type of eddy current coil has differential sensors that are directionally sensitive and provide detection of crack tips? 

A:

Conformal coil 

Q:

What happens when an eddy current probe coil arrangement is closer to the test surface? 

A:

Small cracks can be detected due to greater sensitivity 

Q:

Eddy current instruments must have all of these capabilities except? 

A:

Dependability

Q:

What is used to detect disturbances in the magnetic field produced by passing an alternating current in a thin planar foil of doped yttrium iron garnet? 

A:

Magneto-optic imaging 

Q:

What produces an alternating magnetic field in eddy current testing? 

A:

Probe

Vol.3

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