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Ultrasonic Testing L1 > General > Flashcards

General Flashcards

1
Q

Define a DISCONTINUITY

A

A metallurgical interruption within the material

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2
Q

Define a REJECT in regards to NDT

A

A discontinuity determined to be unacceptable when compared to Acceptance Criteria in regards to type, size, distribution, location, % of wall loss, etc.

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3
Q

When is it necessary to perform NDT in accordance with an approved procedure?

A

ALWAYS

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4
Q

Which of the following would be a mill anomaly or mill defect:

FLAW IN WELD METAL
FLAW IN HAZ
FLAW IN BASE METAL

A

FLAW IN BASE METAL

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5
Q

What might cause SCATTERED POROSITY

A

Faulty welding technique or moist or contaminated materials

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6
Q

What might cause CLUSTER POROSITY

A

Poor welding technique in WELD STOP OR START

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7
Q

What might cause LINEAR POROSITY

A

Caused by CONTAMINATION CAUSING GAS EVOLUTION and usually appears between passed or at interfaces

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8
Q

What is the general alignment of ELONGATED POROSITY

A

PARALLEL to the weld axis

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9
Q

Which welding processes may produce unwanted INCLUSIONS

A 
SMAW
FCAW
SAW
ESW
TIG
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10
Q

Which welding processes may produce unwanted SLAG INCLUSIONS

A

SMAW
FCAW
SAW
ESW

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11
Q

Name three problems with welding workmanship that may cause slag inclusions?

A

Poor cleaning between passes

Poor fit-up

Poor welding technique

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12
Q

If the molten slag has a lower melting point and lower density than the molten weld metal,

Can the lack of preheat or cool adjacent base meta go live rise to the likelihood of trapped slag inclusions?

A

YES

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13
Q

Which process may result in an inclusion OTHER THAN slag inclusions?

A

GTAW or TIG

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14
Q

Other than within the weld metal,

Where might inclusions occur?

A

At the INTERFACE between the weld metal and base metal…

Eg. On the BEVEL or the LAND

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15
Q

What is LOF

A

Lack Of Fusion
Or
Incomplete Fusion

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16
Q

Where does Lack Of Fusion occur?

A

Between weld metal and fusion faces such as:

Weld metal to base metal
Weld metal interfaces

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17
Q

Why does LOF occur?

A

Insufficient weld heat input

Lack of access due to weld joint geometry

Poor welding technique in manipulating the weld puddle

Lack of cleanliness at weld joint prep

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18
Q

Regarding weld quality

What is IP?

A

Incomplete Penetration

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19
Q

What might cause IP?

A

Insufficient weld heat input

Improper weld joint design

Improper control of welding arc

Poor WPS Development

Lack of needed root backgouging

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20
Q

What NDT method/technique is best to determine if backgouging at root has been performed properly?

A

MT with hand-held AC Yoke using Visible Dry Powder

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21
Q

What weld flaw has the acronym UC?

A

Undercut

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22
Q

What might causes Undercut?

A

Excessive weld heat input

Too high weld travel speed
(this may be the cause when not allowing the time to deposit sufficient filler metal)

Too low travel speed
(This may be the cause when heat input is excessive, therefore a lower travel speed increases the amount of heat input)

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23
Q

What causes the welding defect UNDERFILL?

A

Lack of full of the weld joint.

Additional pass(es) should be deposited as necessary to completely fill the weld joint

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24
Q

Which weld process idea flux covered electrodes

A

SMAW

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25
Q

Which welding process uses hard wire with Argon,cO2 or mixed shielding gas?

A

GMAW

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26
Q

Which welding process uses a hollow wire filled with granulated flux

A

FCAW

27
Q

Define SMAW

A

Shielded Metal Arc Welding

28
Q

Define FCAW

A

Flux Cored Arc Welding

29
Q

Define GMAW

A

Gas Metal Arc Welding

30
Q

Define GTAW

A

Gas Tungsten Arc Welding

31
Q

Define SAW

A

Submerged Arc Welding

32
Q

Define ESW

A

Electro-Slag Welding

33
Q

Define the elements of the following electrode designation

E7018

A

Electrode
70Ksi (70)
All position (1)
Flux composition (8)

34
Q

Which of the following would be a stress riser

LAMINATION

UNDERCUT

POROSITY

A

UC

35
Q

Which welding code would the following structure be governed by:

BRIDGE

A

AWS-D1.5

36
Q

What area of a weld will a crater crack be located?

A

At the weld STOP

37
Q

In the welding of a pipeline girth weld,

What is a “button”?

A

It is the overlap of the opposing weld cover passes
One clockwise
The other counter clockwise
Generally overlapping at the 12:00 position

38
Q

What could be done to eliminate or at least reduce the potential for HAZ cracking?

A

PREHEAT

39
Q

Where is a lamination likely to be detected…after welding

A

Where transverse stress occurs directly adjacent to a CJP weld, due to through thickness weld shrinkage strain

Eg. At a Tee-joint connection

40
Q

What NDT method/technique would best detect a LAMINATION

A

UT ZERO DEGREE STRAIGHT-BEAM

41
Q

What NDT method/technique would best detect a TOE CRACK

A

MT with a HAND-HELD AC YOKE

42
Q

Which of the two regulatory documents is an ANSI Standard?

ASNT SNT-TC-1A
Or
ASNT CP-189

A

ASNT CP-189

43
Q

What is a CERTIFICATION

A

Written test among that an individual has met the requirements of a standard

44
Q

Define EDUCATION

A

An institutionalize D program, prescribed by appropriate authorities, that is offered by schools established for the sole purpose of providing instruction in an orderly planned and systematic fashion

45
Q

Define FORMAL TRAINING

A

An organized documented program of activities designed to impart knowledge and skills required to be qualified to a standard.

46
Q

Regarding NDT:

What does FORMAL TRAINING consist of?

A

Classroom, practical and programmed instruction, approved by the responsible Level III

47
Q

Per ASNT CP-189

Qualification consist of what critical elements?

A

Training

Training Course completion exam ensuring comprehension

Documented Experience

Examination
     Vision
     General
     Specific
     Practical
48
Q

When do NDT Level 1 & 2 certifications expire as per CP-189?

A

Upon termination of employment

On the last day of the month of expiration, at the end of five years from the date of examination

49
Q

What is CUI?

A

Corrosion Under Insulation

50
Q

What is a Shooter Sheet used to document?

A

UTT Wall Thickness Readings

51
Q

What does the acronym TWIC stand for?

A

Transportation Worker Identification Card

52
Q

Define the acronym

AWS

A

American Welding Society

53
Q

Define the acronym API

A

American Petroleum Institute

54
Q

Define the acronym PLI

A

Pipeline Integrity

55
Q

In regards to Pipeline Smartpigging

Define the acronym ILI

A

In-Line Inspection

56
Q

Define the acronym ASNT

A

American Society for

Non-destructive Testing

57
Q

For groove welding certification

What is the 1G position

A

FLAT

58
Q

For groove welding certification

What is the 2G position

A

HORIZONTAL

59
Q

For groove welding certification

What is the # designation for the VERTICAL position

A

3G

60
Q

For groove welding certification

What is the # designation for the CHINESE VERTICAL position WITH A RESTRICTER RING

A

6GR

61
Q

Which welding process uses Water Cooled backing bars/fit-up jigs

A

ESW

ELECTRO-SLAG WELDING

62
Q

Who would perform a SAW weld?

A Certified Weldor
OR
A Certified Welding Operator

A

A CERTIFIED WELDING OPERATOR

Reminder: The Arc is not visible during Submerged Arc Welding

63
Q

How would you determine the actual refracted angle in Stainless Steel if using an angle beam wedge designed for use in Carbon Steel

A

Using Snell’s Law, first determine the incident angle of the 70* CS wedge;
Then use Snell’s Law with the SStl mat’l velocity as Vel2.

Ultrasonic Testing L1 (5 decks)

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