Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

API 577 > Study Questions > Flashcards

Study Questions Flashcards

1
Q

How many welds does API 577 require to be RT’d?

A

None / The # of welds to RT is established by the primary code

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Arc Blow

A

Deflection of an arc from it’s normal path due to magnetic forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Arc Length

A

The distance from the tip of the welding electrode to the adjacent surface of the weld pool.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Autogenous weld

A

A fusion weld made without filler metal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Backing

A

Material placed at back side of joint to support and retain molten weld metal.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Defect

A

Discontinuity(s) that render a part or product unable to meet min applicable standards or specs. The term designates rejectability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Discontinuity

A

An interruption of the typical structure of a material. May or may not be a defect depending on severity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Inclusion

A

(SOFT) Entrapped foreign solid material such as Slag, Oxide, Flux, Tungsten (SOFT)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Undercut

A

A groove melted into the base metal adjacent to the weld toe or weld root and left unfilled by weld metal.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Corrective action of non-conformance:

A

Based on nature of non-conformance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which welding process is most widely used

A

SMAW

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Describe the SMAW process

A

Arc between covered electrode and weld pool. Heat of arc comes from tip of a consumable covered electrode. Shielding comes from decomposition of the electrode coating

Arc Between Electrode & Pool
Heat comes from electrode
Shielding comes from electrode coating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Basic Functions of the SMAW electrode coating

A
  1. Shielding Gas
  2. Prevent excessive grain growth
  3. Slag blanket to protect weld
  4. Sometimes provides alloy elements

SHIELD
PEG
BLANKET
ALLOY

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Advantages of SMAW

A

Simple

Suitable for most commonly used metals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Limitations of SMAW

A

Deposition rates are lower

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Advantages of GTAW

A

Produces high purity welds

Little postweld cleaning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Limitations of GTAW

A

Low deposition rates
Low tolerance for contaminants
Difficult to shield

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Advantages of GMAW

A

Only consumable that can weld most commercial metals & alloys
High deposition rates
Minimal cleanup

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Limitations of GMAW

A

Complex equipment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Advantages of FCAW

A

Metallurgical benefits from flux
Higher deposition and productivity rates
Shielding produced at the surface, more tolerant of wind.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Limitations of FCAW

A

Complex equipment
Requires exhaust equipment
Slag needs to be removed between passes
Backing material required for root pass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Advantages of SAW

A

Very high deposition rates

High quality welds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Limitations of SAW

A

Weld is not visible during the welding process
Expensive equipment
Limited to shop applications and flat position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

SMAW stands for

A

Shielded Metal Arc Welding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

GMAW stands for

A

Gas Metal Arc Welding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

GTAW stands for

A

Gas Tungsten Arc Welding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

FCAW stands for

A

Flux Cored Arc Welding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

SAW stands for

A

Submerged Arc Welding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Which GMAW transfer mode is “fast-freezing” and tends to have LOF

A

GMAW - Short Circuit Mode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Which process uses a directed stream of discrete drops

A

GMAW - Spray Transfer Mode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Variables required on WPS

A

Essential, non-essential and supplemental essential when toughness testing is required

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Variables required on PQR

A

Essential, non-essential are optional

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Per Section IX, who supervises the testing of a PQR coupon?

A

Manufacturer or contractor - the owner of the procedure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

What are welding materials?

A

Base metal, filler metal, fluxes & gases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

What is the purpose of P-Numbers?

A

Reduce the # of welding procedure qualifications required

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What is the basis for F-Numbers

A

Usability characteristics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

What is the qual limits for a welder who qualifies using an electrode from a specific F-Number family?

A

Qualified for all electrodes of the same F-Number. With carbon steel, also qualifies for other F-Numbers

38
Q

What alloy is P-53

A

Titanium

39
Q

What is the A-Number

A

ANALYZE / Analysis of chemical composition of the weld

40
Q

Where are some electrodes stored

A

Warm holding ovens

41
Q

Low Hydrogen electrode storage

A

Separate from other electrodes

42
Q

What to do with wet fluxes or electrodes

A

Discard

43
Q

Change in WPQ essential variable requires

A

Welder Requal

44
Q

Which discontinuity is at the toe of the weld?

A

Overlap, Undercut is also correct but was not one of the 4 choices

45
Q

ET is useful NDE method for which type of joints?

A

Butt welds

46
Q

How best to find side wall lack of fusion?

A

UT

47
Q

What is the most extensively used NDE methods for welds?

A

Visual

48
Q

Visual exam distance

A

6-24”

49
Q

Visual exam minimum angle

A

30 degrees

50
Q

Needed light intensity

A

100 foot candles

51
Q

Use of Bridge Cam gauge

A

Measure weld prep angle

52
Q

MT - Flux direction best to see a discontinuity

A

Perpendicular to discontinuity

53
Q

Result of MT Residual magnetism

A

Deflect Arc

54
Q

PT on SS watch out for

A

Chlorine and fluorine, Code mentions chlorine, sulfur and halogens but fluroine has been a test answer

55
Q

PT max temp limit

A

125 F

56
Q

What determines which IQI should be used

A

Thickness of base metal plus reinforcement

57
Q

Placement of Wire IQI

A

Perpendicular across weld

58
Q

Typical RT sources

A

IR 192 and Cobalt 60

59
Q

Iridium 192 use on what wall thickness

A

1/4-3”

60
Q

Cobalt 60 use on what wall thickness

A

1.5-7”

61
Q

UT Calibration

A

Before & After exam

62
Q

UT calibration block temp

A

w/in 25F of part to be examined

63
Q

UT recalibration

A

at least every 4 hours

64
Q

Direction of UT angle beam scan for indications transverse to the weld

A

Parallel to the weld

65
Q

Why use Hardness Testing

A

Weld & HAZ, & after PWHT to see if mat’l soft

66
Q

Use of FMR (Field Metallography Replication)

A

Find excessively hard HAZ structure

67
Q

Pressure test typical holding time

A

at least 30 minutes

68
Q

Weld metal is similar to that of

A

Castings

69
Q

Ductility Definition

A

The ability of a material to deform plastically without fracturing

70
Q

Names of hardness tests

A

Brinell, Rockwell, Knoop & Vickers

71
Q

What is the heat affected zone (HAZ)

A

Portion of base metal that has not been melted but whose mechanical properties or microstructure has been altered

72
Q

For carbon steels, the HAZ is parent metal NOT melted but exceeded what temperature?

A

1350 F

73
Q

Define Toughness

A

Ability of a material to absorb energy and deform plastically before fracturing

74
Q

One of the most common tests for toughness

A

Charpy Impact test

75
Q

What do low toughness values indicate

A

Brittle material

76
Q

Primary reason for PWHT

A

Relive residual stress

77
Q

Test for hardenability

A

Jominy Bar

78
Q

Hardenability is related to the amount of

A

Martensite formed during heating & cooling

79
Q

Significant amounts of martensite in the HAZ can lead to

A

Hydrogen cracking or a loss of Ductility and Toughness

80
Q

Brinell Hardness limit for 1-1/4 chrome - 1/2 moly

A

225

81
Q

Austenitic welds required how much delta ferrite to resist cracking

A

5-20%

82
Q

Differences in welding nickel alloys

A

Tendency to be sluggish

83
Q

Rod type to use when hot tapping:

A

Low hydrogen electrodes

84
Q

Examples of low hydrogen electrodes:

A

E7016, E7018 & E7048 “7016,18 & 48”

85
Q

Product flow rate in piping during hot tapping

A

1.3 - 4.0 ft/sec

86
Q

Maximum rod size to use when hot tapping material less than 1/4” thick?

A

3/32” diameter

87
Q

Marking in the tail of a weld symbol

A

Specification or Process

88
Q

Meaning of the first two digits of a SMAW Electrode

A

Tensile Strength

89
Q

What processes use a rod with designation “ERXXX”

A

GMAW/GTAW

90
Q

What does “S” mean in electrode designation of GMAW/GTAW

A

Solid Wire

91
Q

Common SMAW electrode used for root pass on carbon steel welds

A

E6010

API 577 (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions