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CWI > Chapter 12: Nondestructive Examination Processes > Flashcards

Chapter 12: Nondestructive Examination Processes Flashcards

1
Q

Which of the following NDE methods do not usually require electricity?

Eddy current, visible dye penetrant, visual

A

Visible dye penetrant, visual

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2
Q

Which of the following NDE methods is limited to the detection of surface discontinuities?

Visual, penetrant, magnetic particle

A

All 3

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3
Q

To be most effective, visual inspection should be performed:

A

Before, during, and after welding

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4
Q

The time during which the penetrant remains on the surface of the part to allow it to be drawn into any discontinuities is called:

A

Dwell time

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5
Q

Which type of magnetizing current provides the best combination of penetrability and particle mobility?

A

Half-wave rectified DC

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6
Q

What NDE method will most likely reveal subsurface porosity?

A

RT

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7
Q

A correct following statement regarding RT and density:

A

A high-density discontinuity will produce a light image on the film

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8
Q

Which of the following discontinuities is rarely detected using RT?

A

Lamination

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9
Q

What device is used during radiography to indicate the acquired sensitivity of a radiograph?

A

Penetrameter (Image Quality Indicator)

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10
Q

Which nondestructive examination method utilizes sound energy as a probing medium?

A

UT

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11
Q

The process whereby the ultrasonic indications are related to physical distances in a test standard is referred to as:

A

Calibration

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12
Q

A test probé containing an alternating current coil is used for which NDE method?

A

ET

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13
Q

Changes in electrical conductivity can be measured using which NDE method?

A

ET

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14
Q

Which of the following NDE methods are suitable for detecting surface cracks?

A

Any

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15
Q

What NDE method is most likely to reveal internal laminations in a rolled plate?

A

UT

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16
Q

PT is limited to the detection of those discontinuities that are:

A

Clean and open to the test object surface

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17
Q

Visible Dye penetrant indications:

A

Must be observed under white light

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18
Q

Penetrant can be applied by:

A

Brushing, spraying, dipping

19
Q

Fluorescent penetrants are generally more sensitive than visible dye penetrants because:

A

Fluorescent indications are better seen by the human eye

20
Q

Which of the following cause decreased sensitivity in PT?

Too heavy application of the developer, oily or greasy test object, improper penetrant removal

A

All above

21
Q

PT is limited to test objects that:

A

Are nonporous

22
Q

MT will discover:

A

Surface discontinuities and slightly subsurface discontinuities

23
Q

MT is most sensitive to those discontinuities that are:

A

Perpendicular to the lines of flux

24
Q

MT is limited to test objects that:

A

Are ferromagnetic

25
Q

UT is most sensitive to those discontinuities that are:

A

Perpendicular to the sound waves

26
Q

UT uses frequencies:

A

Above range of human hearing

27
Q

In UT the horizontal axis of the CRT screen gives information about:

A

The distance the sound has traveled in the part

28
Q

RT shows areas of lower density as:

A

Dark regions on the film

29
Q

RT shows areas of less thickness as:

A

Dark Regions

30
Q

RT shows areas of increased transmission as:

A

Dark regions on the film

31
Q

Tungsten inclusions generally appear in RT as:

A

Light regions

32
Q

Cracks generally appear in RT as:

A

Dark lines on the film

33
Q

Weld reinforcement generally appears as

A

Light regions on the film

34
Q

Porosity generally appears in RT as:

A

Dark Regions

35
Q

Shallow surface cracks can best be detected in type 308 stainless steel by:

A

PT

36
Q

Underbead cracks can best be detected by:

A

UT

37
Q

Porosity in ESW Can best be detected by:

A

RT

38
Q

The vertical axis of the UT CRT screen represents m:

A

Reflector size

39
Q

What NDE methods rely on the transmission of sound energy through the test object?

A

UT and AET

40
Q

What NDE methods often rely on the application of a hydrostatic pressure vessel?

A

Pressure tests, leak tests, and Proof tests

41
Q

What test below is applied to determine the metallurgical effects of welding on austenitic stainless steels?

A

Ferrite Test

42
Q

Application of a vacuum box to the inside surface of a steel storage tank is one from of which test?

A

Leak Test (LT)

43
Q

FN is a unit of measurement with which test?

A

Ferrite Test

44
Q

NDE personnel are normally qualified in accordance with:

A

ASNT SNT-TC-1A

CWI (15 decks)

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