Chapter 12: Nondestructive Examination Processes

Question 1

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

Eddy current, visible dye penetrant, visual

Answer 1

Visible dye penetrant, visual

Question 2

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

Visual, penetrant, magnetic particle

Answer 2

All 3

Question 3

To be most effective, visual inspection should be performed:

Answer 3

Before, during, and after welding

Question 4

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

Answer 4

Dwell time

Question 5

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

Answer 5

Half-wave rectified DC

Question 6

What NDE method will most likely reveal subsurface porosity?

Answer 6

RT

Question 7

A correct following statement regarding RT and density:

Answer 7

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

Question 8

Which of the following discontinuities is rarely detected using RT?

Answer 8

Lamination

Question 9

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

Answer 9

Penetrameter (Image Quality Indicator)

Question 10

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

Answer 10

UT

Question 11

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

Answer 11

Calibration

Question 12

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

Answer 12

ET

Question 13

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

Answer 13

ET

Question 14

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

Answer 14

Any

Question 15

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

Answer 15

UT

Question 16

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

Answer 16

Clean and open to the test object surface

Question 17

Visible Dye penetrant indications:

Answer 17

Must be observed under white light

Question 18

Penetrant can be applied by:

Answer 18

Brushing, spraying, dipping

Question 19

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

Answer 19

Fluorescent indications are better seen by the human eye

Question 20

Which of the following cause decreased sensitivity in PT?

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

Answer 20

All above

Question 21

PT is limited to test objects that:

Answer 21

Are nonporous

Question 22

MT will discover:

Answer 22

Surface discontinuities and slightly subsurface discontinuities

Question 23

MT is most sensitive to those discontinuities that are:

Answer 23

Perpendicular to the lines of flux

Question 24

MT is limited to test objects that:

Answer 24

Are ferromagnetic

Question 25

UT is most sensitive to those discontinuities that are:

Answer 25

Perpendicular to the sound waves

Question 26

UT uses frequencies:

Answer 26

Above range of human hearing

Question 27

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

Answer 27

The distance the sound has traveled in the part

Question 28

RT shows areas of lower density as:

Answer 28

Dark regions on the film

Question 29

RT shows areas of less thickness as:

Answer 29

Dark Regions

Question 30

RT shows areas of increased transmission as:

Answer 30

Dark regions on the film

Question 31

Tungsten inclusions generally appear in RT as:

Answer 31

Light regions

Question 32

Cracks generally appear in RT as:

Answer 32

Dark lines on the film

Question 33

Weld reinforcement generally appears as

Answer 33

Light regions on the film

Question 34

Porosity generally appears in RT as:

Answer 34

Dark Regions

Question 35

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

Answer 35

PT

Question 36

Underbead cracks can best be detected by:

Answer 36

UT

Question 37

Porosity in ESW Can best be detected by:

Answer 37

RT

Question 38

The vertical axis of the UT CRT screen represents m:

Answer 38

Reflector size

Question 39

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

Answer 39

UT and AET

Question 40

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

Answer 40

Pressure tests, leak tests, and Proof tests

Question 41

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

Answer 41

Ferrite Test

Question 42

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

Answer 42

Leak Test (LT)

Question 43

FN is a unit of measurement with which test?

Answer 43

Ferrite Test

Question 44

NDE personnel are normally qualified in accordance with:

Answer 44

ASNT SNT-TC-1A