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Cwi Wrong Answers I Got > Test > Flashcards

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1
Q

Etching is not used in inspection for which of these?

A. checking the area in the vicinity of ark strikes

B. making macrosections of the cross section welds

C. removing backing

D. Determining the positions of the ends of cracks

A

C. Removing backing

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2
Q

A ferrule is used for shielding in which of the following processes?

A. ESW

B.PAW

C.PAC

D.SW

A

D.SW (stud welding)

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3
Q

Which of the following is not considered a type of metal transfer?

A. Short circuiting

B. Spray

C. Droplet

D. Globular

A

C. Droplet

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4
Q

The weld symbol used when padding is required is known as what?

A

Surfacing

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5
Q

When using FCAW, the distance from the end of the nozzle to the work piece is called what?

A

Standoff distance

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6
Q

The combined effect of scattering and absorption is called ?

A

Attenuation

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7
Q

Which of the following methods cannot be used for hardness testing?

A. Indentation depth

B. The area of the indentation

C. The unrecovered area of the indentation

D. The rebound height

A

B. The area of indentation

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8
Q

What document defines the proper terminology for use by the CWI?

A

AWS A3.0

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9
Q

The ability to locate a small discontinuity is called ?

A

Sensitivity

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10
Q

Magnetic particle cannot be used on which of the following materials?

A. 316 stainless steel

B. A36 carbon steel

C. 420 stainless steel

D. Cast iron

A

A. 316 stainless steel

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11
Q

What type of standardized, high strain test is used to determine the amount of energy absorbed by a material during fracture?

A

The Carpy test

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12
Q

Which NDE method can determine heat treatments conditions?

A

Eddy current

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13
Q

The ultimate responsibility for all welding performed belongs to whom?

A

The employer

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14
Q

The individual symbols used on drawings, project specifications for welds are known as _____ symbols .

A

Weld

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15
Q

If a metal exhibits a great deal of elongation prior to failing in tensile, that metal has a high ?

A

Ductility

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16
Q

Which NDE method would be least beneficial for judging the soundness of weld?

A. Straight beam UT

B. Radiography

C. Eddy current

D. Phased array UT

A

A. Straight beam UT

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17
Q

The process that employs an exothermal chemical reaction to develop a high temperature is

A

Thermite welding

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18
Q

Identify the non standard penetrant test technique from the list below.

A. Post emulsifiable color contrast

B. Solvent removable fluorescent

C. Water washable fluorescent

D. Post emulsifiable flocculating

A

D. Post emulsifiable flocculating

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19
Q

Of the following which is not considered an important duty of the welding inspector?

To judge the quality of the product in relation to some form of written specification

To monitor welding operations

To interpret the specification requirements

Interpret radiographic films

A

Interpret radiographic films

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20
Q

This microstructure is

A

Pearlite

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21
Q

What is the area of a round bar with a diameter of 0.500 inch?

A

0.196 sq. In

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22
Q

What is the area of a round bar with a diameter of 0.425?

A

0.142

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23
Q

The addition to of which gas improves penetration?

Oxygen

Argon

Helium

Carbon dioxide

A

Carbon dioxide

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24
Q

What MT technique could be used for discovery of longitudinal flaws?

Side shot

Coil shot

All these are correct

Head shot

A

Headshot

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25
Back purging when welding 316 stainless steel can be accomplished with
Nitrogen
26
In Eddy Current testing, the coil is charged by what type of current?
Alternating current
27
Identify which is not a stage in developing film. Drying Fixing Immolation Washing
Immolation
28
Which type of magnetic current provides the best iron particle mobility? DC AC DCEP DCEN
AC
29
What NDE method is shown here
Visual liquid penetrant
30
The document that certifies a materials chemicals properties and states compliance with international standards organization is called
Mill test report
31
What is the purpose of a welding procedure qualification?
To demonstrate the mechanical properties of the prescribed materials and methods
32
A soldering discontinuity that has a crystalline structure that may grow from mostly pure tin or sink on finished surfaces is referred to as
Tin whiskers
33
The tendency of a solid material to move slowly or deformed permanently under the influence of mechanical stresses is called
Creep test
34
Which penetrant method is easiest to use in the field?
Visible, solvent removable
35
From where does most of hydrogen in SAW weld come from?
Moisture in the flux
36
Excessive spatter on a weldment may be caused by all of the following except A. Excessive electrode extension B. Excessive amperage C. Excessive stick out D. Excessive voltage
B. Excessive amperage
37
Which of the following materials would result in the lightest radiograph (assuming they are the equal thickness) A. Lead B. Steel C. Aluminum D. Copper
A. Lead
38
This discontinuity is most likely what? A. Internal concativity B. Inadequate penetration due to hi low C. Inadequate penetration D. Internal undercut
C. Inadequate penetration
39
A welding procedure specification should always include
The procedure qualification number
40
Dye penetrants may be removed by what means? A. Water emulsifiable B. Solvent C. Pre-emusifable D. Post-Solvent
B. Solvent
41
A broken surface is being observed. A small pore or inclusion type discontinuity appears as a round bright area. Which of the following best defines this discontinuity? Crack Fisheye Spiderweb Nucleation
Fisheye
42
If inadequate penetration cannot exceed 6% of the weld length, and the pipe has an ID of 3 inches, what is the maximum allowable length of PI?
.565 inches
43
Which of the following materials cannot be tested by magnetic particle techniques? Copper alloys Ferritic stainless steels High alloy steels Tool steels
Copper alloys
44
When examining the cross section of a completed groove weld, the difference between the fusion face and the weld interface is what?
Depth of fusion
45
The commonly used flux in brazing and braze welding of ferrous metals is
Borax
46
Which brazing filler metal can be used with all alloys?
BAg
47
Eddy current testing cannot determine which property PWHT Coating thickness Hardness Toughness
Toughness
48
Decibel is a term associated with which NDT method?
UT (ultrasonic testing)
49
The welding position where both the axis of the weld and the weld face are approximately horizontal is called
Flat
50
In which magnetizing method is the current passed directly through the part, thereby setting up a magnetic field at right angles to the current flow?
Circular magnetization
51
SAW is being used to deposit a weld at 35 volts, 450 amps and 27 in/min. The heat input of this weld is
35 kg/in
52
FCAW is being used to weld a 1” thick structure steel members. Welding is being done at 30 volts, 250 amperes, and 12”/min travel speed. What is the heat input?
37.5 kj/in
53
Which code governs the qualification of procedures and welders for boiler and pressure vessels?
Asme sec. IX
54
The number of cycles per second is definition of
Frequency
55
A yoke and cold both produce what type of magnetic field?
Longitudinal
56
Which number represents the weld interface ?
5
57
Arc strikes outside of the weld area may be repaired by what means ?
Arc strikes cannot be repaired
58
Flammable liquids such as gasoline, tar, and oil belong to what class of fire?
B
59
The ability to locate discontinuities that are close together writhing the material is called?
Resolution
60
The property of cementite is
Hard and brittle
61
Which of the following is not considered an arc welding process? EGW SW RSW SAW
RSW
62
A tensile specimen with an area of .413 square inches failed at a load of 28,500 pounds. What is the ultimate tensile strength?
69 ksi
63
The melting point of carbon steel is how many degrees Fahrenheit ?
2,780
64
In GTAW the length the tungsten electrode extends beyond the end of the gas cup is known as
Stickout
65
The initial closing pass in a tubular structure CJP groove weld, made from one side only, Wich serves as a backing for subsequent welding, but is not considered as part of the theoretical weld is referred to as
Backup weld
66
A welder may be tested by all but which of the following Radiography Soundness testing Charpy impact testing Side bend testing
Charpy impact testing
67
All the following are highly toxic materials with exposure limits of < 1.0 mg/m3 expect Lead Nickel Aluminum Vanadium
Aluminum
68
A welding technique that results in layers having more than one weld bead is called
Split layer technique
69
The NDE method which uses a mercury lamp with a filter in a environment with less than 2fc of viable light is
FPI
70
The crystal structure of austenite is
FCC (Face center cubic)
71
Post emulsified penetrants
Required a separate emulsifier to break the penetrant down and make it water washable
72
Electric currents > 6 milliamps are considered
Primary currents
73
Which gasses may be used for shielding when using the GTAW process?
Argon and helium
74
What element is added to tungsten when making GTAW electrodes for use with DCEN?
Thorium
75
Bend test specimen my be taken and prepared in all the following ways except Longitudinal root and face Elongated root and face Longitudinal root and side Parallel side
Longitudinal root and face
76
As strength increases in carbon steel, what happens to ductility?
It decreases
77
Which may be considered mandatory ? Codes Standards Specification All of these are correct
all of these are correct
78
This welding position is known as
4f

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