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Welder 1 > 103 Final > Flashcards

103 Final Flashcards

1
Q

Question 1
1/1 point
The recommended fit up for a 3G 10-gauge weld would include: (24)

1/8-inch root spacing
tacks between 1/8-1/4-inch
no high-low
all of the above

A

all of the above

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2
Q

What is the primary purpose of the shielding gas used for gas metal arc welding? (2)

reduce the carbon content in the weld metal

protect the weld from the atmospheric air

combines with weld metal to improve mechanical properties

increases the heat in the weld puddle to improve fusion

A

protect the weld from the atmospheric air

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3
Q

What is an advantage of using argon over helium shielding gas for GMAW on aluminum? (5)
* stable arc
* superior cleaning
* arc is easy to start
* all of the above

A
  • all of the above
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4
Q

In the wire classification E491T-6, what does the E stand for? (21)
electrode
electrical
elastic
elongation

A

electrode

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5
Q

When lap joint surfaces are positioned at a 45-degree angle to the horizontal plane for welding, it would be referred to as: (12)
4F
3F
2F
1F

A

1F

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6
Q

What does the 6 define, in the wire classification E491T-6? (21)|
60,000 pounds minimum tensile strength

slag, current, polarity and shielding gas

the type of shielding gas used

chemistry and properties

A

slag, current, polarity and shielding gas

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7
Q

The bevel angle normally used on pipe is: (3)|
* 10 degrees to 30 degrees
* 30 degrees to 37.5 degrees
* 40 degrees to 60 degrees
* 60 degrees to 75 degrees

A
  • 30 degrees to 37.5 degrees
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8
Q

What is another name for globular transfer, when using carbon dioxide as a shielding gas? (9)
open arc
Co2 arc
closed arc
extension arc

A

open arc

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9
Q

What daily shutdown procedures must be followed? (11)

turn off power switch and shielding gas supply valve

disconnect the power to the machine

remove flowmeter/regulators

disconnect the welding gun

A

turn off power switch and shielding gas supply valve

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10
Q

Which electrode wire is the most versatile and popular for welding carbon steel? (12)
ER70S-4
ERZOS-5
ER705-6
ER70S-7

A

ER705-6

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11
Q

The method of manufacturing fluxes is classified by two categories. Choose the correct answer. (28)
fused and unfused
fused and bonded
oxidized and de-oxidized
granular and paste

A

fused and bonded

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12
Q

Which of the following may be responsible for excessive internal reinforcement after welding a 1GR carbon steel root? (35)

rotation of pipe too quick

no internal gas purge

drag technique

weld metal applied in the twelve o’clock position

A

weld metal applied in the twelve o’clock position

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13
Q

Weld bead cracking could be the result of: (30)
*using a short stick out
* using 25 shielding gas on carbon steel
* an overheated welding gun
* rigidly fixed joints

A
  • rigidly fixed joints
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14
Q

Why might a flux hopper be heated? (31)
to ensure the flux remains dry
to improve welding efficiency
to preheat the flux prior to welding
to maintain fusion properties of the flux

A

to ensure the flux remains dry

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15
Q

Which three dimensions are significant to pipe size: (2)

length, weight, inside diameter

length, wall thickness, schedule

nominal size, length, schedule +

schedule, outside diameter, inside diameter

A

schedule, outside diameter, inside diameter

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16
Q

Which gas has the highest weight (specific gravity)? (4)
hydrogen
helium
argon
nitrogen

A

argon

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17
Q

Which statement is correct when referring to galvanic corrosion? (6)

any process that increases the refractory oxide causes corrosion

aluminum subjected to high temperature service

aluminum that is continually subject to oil based environments

steel contacting aluminum, while in a moist environment

A

steel contacting aluminum, while in a moist environment

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18
Q

Room temperature or preheat of up to alloys. (10)
66 degrees C (150 degrees F)
177 degrees C (350 degrees F)
232 degrees C (450 degrees F)
260 degrees C (500 degrees F)

A

66 degrees C (150 degrees F)

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19
Q

Pipe size is referred to by the term: (2)
* numerical pipe size (NPS)
* normal pipe size (NPS)
* national pipe size (NPS)
* nominal pipe size (NPS)

A
  • nominal pipe size (NPS)
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20
Q

The proper power source set up for GMAW on aluminum is: (8)
AC with high frequency
DC with straight polarity
DC with reverse polarity
all of the above

A

DC with reverse polarity

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21
Q

What is the recommended procedure used to reduce distortion, when welding in the 2G position? (21)
place a 1/2-inch root tack in the joint

preset the joint 3 - 4 degrees

reduce the number of passes in the joint

preheat the joint before welding

A

preset the joint 3 - 4 degrees

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22
Q

What is the recommended electrode stick out for wire diameter 0.035 - 1/16-inch using the FCAW process?

  • 1/8-inch - 1/4-inch
  • 3/8-inch to 3/4-inch
  • 5/8-inch - 1-inch
  • stick out is automatically regulated
A
  • 3/8-inch to 3/4-inch
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23
Q

Which of the following aluminum filler metals is suitable for high temperature service? (33)
4043
5356
5554
6061

A

5554

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24
Q

The primary functions of the flux in the core of the wire are to: (20)
provide deoxidizers
remove impurities
act as an arc stabilizer
all of the above

A

all of the above

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25
Q

Changing the GMAW gun inclination will: (17)
* change the depth of penetration
* have no effect on the weld
*cause the wire to pile up at the drive rolls
*cause the wire to feed unevenly

A
  • change the depth of penetration
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26
Q

The FCAW process can be used without the addition of externally applied shielding gas for field applications: (17)

when working indoors with little air movement

when welding mild steel with less than 0.35% carbon content

when welding on high manganese crusher rolls

when using a self-shielded tubular flux filled electrode

A

when using a self-shielded tubular flux filled electrode

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27
Q

What type of hose should be used with helium shielding gas? (31)
* plastic type hoses
* rubber type hoses
* acetylene hose
* oxygen hose

A
  • plastic type hoses
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28
Q

When using carbon dioxide shielding gas with GMAW welding, the mode of metal transfer is: (8)
* spray transfer
* globular and plasma
* short circuit and globular
* pulsed current

A
  • short circuit and globular
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29
Q

The main advantage of SAW over the SMAW process is: (36)

it will not produce X-ray quality welds

it is an expensive way to get high quality welds

SAW requires highly trained operators

high welding speeds and multiple wire-set-up are achieved

A

high welding speeds and multiple wire-set-up are achieved

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30
Q

GMAW of aluminum is recommended on material: (2)
* less than 3.2 mm (1/8 in.)
* 3.2 mm (1/8 in.) or thicker
* only 12.7 mm (1/2 in.) or thicker
* all of the above

A
  • 3.2 mm (1/8 in.) or thicker
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31
Q

When setting up shop welding assignments, variables change with each project. Which of the following is an essential variable to make sure the final weld has met the standards? (lab)

check and adjust the drive roll tension

clean and feather the tacks

turn on the shielding gas supply

check and adjust the parameters to the welding procedure

A

check and adjust the parameters to the welding procedure

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32
Q

Which alloys exist in an ER5356 filler wire used in the GMAW process? (17)
aluminum and manganese
aluminum and copper
aluminum and magnesium
aluminum and silicon

A

aluminum and magnesium

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33
Q

When performing a 2F weld with GMAW on 10mm (3/8-inch) material the electrode angle must remain the same for all three passes. (14)
True
False

A

False

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34
Q

What is the recommended electrode inclination for a root on a 2F lap joint using 0.045 wire with flux core? (13)
15 degrees - 30 degrees backhand
15 degrees - 30 degrees forehand
0 degrees - 20 degrees backhand
0 degrees - 20 degrees forehand

A

15 degrees - 30 degrees backhand

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35
Q

In the wire classification E491T-6, what does the 49 define? (21)

49,000 psi minimum tensile strength

minimum tensile strength measured with MPa

maximum tensile strength measured with MPa

49 percent elongation

A

minimum tensile strength measured with MPa

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36
Q

A 2G with backing, performed with the FCAW process requires the welding technique to be completed:
(37)

with weave beads

with stringers or weave bead

using all stringers

to the discretion of the welder

A

using all stringers

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37
Q

What are the most common tools for preparing a uniform, accurate land on a piece of pipe? (4)

buffers and files
grinders and files
cone stone and files
grinder and hacksaw

A

grinders and files

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38
Q

A very small percentage of oxygen mixed with argon will: (9) |
*reduce the cost of shielding gas
* increase puddle fluidity
* create a toxic gas
* oxidize the puddle

A
  • increase puddle fluidity
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39
Q

Which element combined with powdered aluminum, creates a chemical reaction that generates heat used for rocket propellants. (2)

Magnesium
Iron
Oxygen
Hydrogen

A

Oxygen

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40
Q

When welding with GMAW, use a travel speed that will maintain the wire: (16)
* at the back of the puddle
*at the middle of the puddle
*at the leading edge of the puddle
*at a minimum of 6 mm (1/4 in.) in front of puddle

A

*at the leading edge of the puddle

41
Q

When there is a buildup of frost on the carbon dioxide flowmeter, it is recommended that you: (23)
* install a line heater
* increase the gas flow
* increase the inductance
* increase the amperage

A
  • install a line heater
42
Q

Which of the following would represent the recommended position of a flowmeter? (4)

horizontal to the cylinder
vertical to the cylinder
45 degrees to the cylinder
30 degrees to the cylinder

A

vertical to the cylinder

43
Q

Aluminum is used in many applications because of its; (2)

high strength to weight ratio
corrosion resistance
finishing options
all of the above

A

all of the above

44
Q

When welding stainless steel, 1% to 9% oxygen is added to argon shielding gas to: (9)

reduce spatter
increase deposition rates
improve the puddle’s wetting action
reduce cost

A

improve the puddle’s wetting action

45
Q

A record of a test specimen using variables listed in a WPS that has been thoroughly tested to ensure welders consistently yield good welds is referred to as: (22)

PQR
AWS
CWB
MSDS

A

PQR

46
Q

Electrode angle for GMAW on aluminum is: (11)
* 1/4 the included joint angle
* 1/2 the included joint angle
* 0 degrees to 30 degrees forehand
* 0 degrees to 30 degrees backhand

A
  • 1/2 the included joint angle
47
Q

The 70 in the filler metal designation ER70S-2 refers to: (10)

the percentage of elongation or stretch

minimum of 70 000 psi tensile strength

70 kg spools of filler wire

maximum tensile strength 70 000 MPa

A

minimum of 70 000 psi tensile strength

48
Q

When feathering a tack, it is important to also remove metal from the root face (7)
T/F

A

False

49
Q

What method is used to provide shielding from the atmosphere when performing the SAW process? (2)

a flux filled wire
an externally applied gas
a granular flux around the arc
flux coating on the wire provides shielding

A

a granular flux around the arc

50
Q

Which standard outlines welding parameter ranges for GMAW and FCAW filler wires? (3)
* CSA standard W47-1
* CSA standard W48-14
* CSA standard W49-15
* CSA standard W59.2

A
  • CSA standard W48-14
51
Q

Which of the following gas blends will reduce high crowned weld beads on stainless steels? (13)
* helium-carbon dioxide
* argon-carbon dioxide
* nitrogen-carbon dioxide
* helium-argon-carbon dioxide

A
  • helium-argon-carbon dioxide
52
Q

When referencing SAW flux and wire combination F49P2-EH12K, the K indicates: (25)
* multi-pass welds
* killed steel
* contains molybdenum
* magnesium used as a deoxidizer

A
  • killed steel
53
Q

Which of the following GMAW aluminum filler metals are most common? (5)
4043
5156
4047
5056

A

4043

54
Q

What is a disadvantage of using helium over argon shielding gas for GMAW on aluminum? (5)
narrow root width
poor arc initiation
decreased penetration
all of the above

A

poor arc initiation

55
Q

Weld progression for the 5G pipe exercise using GMAW is: (27)

root, fill and cap pass uphill

root, fill and cap pass downhill O

root and fill downhill, cap pass uphill

root downhill, fill and cap pass uphill

A

root downhill, fill and cap pass uphill

56
Q

The finishing pass of a 3G groove weld shall provide reinforcement at the center of the weld not exceeding: (14)
2.5mm - (3/32-inch)
3.2mm - (1/8-inch)
6.4mm - (1/4-inch)
4.2mm - (5/32-inch)

A

3.2mm - (1/8-inch)

57
Q

What is the name for a welding process that uses solid continuous wire and an inert or active shielding gas?
* tungsten inert gas
* shielded metal arc welding
* gas metal arc welding
* flux cored arc welding

A
  • gas metal arc welding
58
Q

When choosing SAW consumables: (27)
* the flux must be balanced with the chemical composition of the electrode
* the required mechanical properties must be obtainable
* the flux must meet the criteria for additional alloys
* all of the above

A
  • all of the above
59
Q

Which of the following is an advantage of using the GMAW process for aluminum? (2)

no flux or slag

welds can be completed in all positions

produces higher deposition rates compared to GTAW

all of the above

A

all of the above

60
Q

What is the minimum number of tacks required on NPS 4-inch or smaller pipe? (6)

  • 2 tacks
  • 3 tacks
  • 4 tacks
  • 5 tacks
A
  • 3 tacks
61
Q

What is the common method of adjusting the contact tube for short-circuiting metal transfer? (18)

so, it extends slightly beyond the end of the nozzle

so, it is recessed in the nozzle

3/8-inch electrode extension

all of the above

A

so, it extends slightly beyond the end of the nozzle

62
Q

Which of the following circumstances would cause turbulence in the flow rate of GMAW shielding gases?

  • high voltage settings
  • spray arc mode of metal transfer
  • shielding gas flow rate that is set to high
  • a long electrode extension
A
  • shielding gas flow rate that is set to high
63
Q

When performing the GMAW process using an inert gas, we could refer to the process as: (4)
* MIG welding
* MAG welding
* self-shielding process
* shielded metal arc welding

A
  • MIG welding
64
Q

When selecting a power source for SAW you should consider which factors? (9)
* cost and efficiency
* color and size
* brand name and service provider * rated amperage, duty cycle, input power

A
  • rated amperage, duty cycle, input power
65
Q

What is the recommended electrode angle for GMAW fillet welds? (16)
* 1/4 of the included angle
* 1/2 of the included angle
* 3/4 of the included angle
* the same as the inclination

A
  • 1/2 of the included angle
66
Q

When welding the root pass in the 1GR position, what could likely occur in the twelve o’clock position. (14)
* concave root
* root suck back
* excessive penetration
* incomplete penetration

A
  • excessive penetration
67
Q

Short-circuit or spray transfer may be used when welding aluminum with the GMAW process. (9)
T/F

A

True

68
Q

Why is a wire straightener required with SAW wire-feeders? (10)
* to work harden the wire prior to welding, increasing mechanical properties
* to reduce cast, and improve arc stability
* to improve electrical conductivity
* to reduce the effects of arc blow

A
  • to reduce cast, and improve arc stability
69
Q

Which of the following GMAW modes would produce the most spatter? (9)
* globular transfer with carbon dioxide
* short circuiting transfer, with argon/carbon dioxide
* spray transfer
* spray transfer, argon/carbon dioxide

A
  • globular transfer with carbon dioxide
70
Q

What type of wire brush do you use to remove oxide film on aluminium before welding?(8)
* carbon steel
* copper
* stainless steel
* aluminum

A
  • stainless steel
71
Q

What is the cause of lack of fusion with GMAW short-circuiting metal transfer? (26)
* too slow travel speed resulting in a pillowing effect
* too large of a root opening
* too large of a root face
* too small of a root face

A
  • too slow travel speed resulting in a pillowing effect
72
Q

When performing SAW with an active or alloy flux, why must the arc voltage be closely monitored and controlled? (29)
* to eliminate preheat
* to control the travel speed
* to reduce the affects of arc blow
* to maintain the desired weld metal composition

A
  • to maintain the desired weld metal composition
73
Q

Self-shielded FCAW is a good choice for welding outdoors because: (17)
* they reduce dimensional defects
* of the portability
* humidity does does not affect the wire
* it tolerates windy conditions

A

*it tolerates windy conditions

74
Q

The acronym SAW stands for: (2)
* Straight Arc Welding
* Submerged Arc Welding
* Swift Arc Welding
* Standard Arc Welding

A
  • Submerged Arc Welding
75
Q

What is the main factor when selecting a filler wire used with the GMAW? (6)
* the type of deoxidizers used
* the correct cast
* current carrying capacity
* match base metal chemistry

A
  • match base metal chemistry
76
Q

Which of the following is a priority procedure before starting to weld on base materials? (3)

  • preheat all materials before welding
  • match the wire to the chemical and mechanical properties of the material
  • material heat numbers must match filler wire heat numbers
  • adjust voltage and current settings for the material thickness
A
  • match the wire to the chemical and mechanical properties of the material
77
Q

What is the most used regulator/flowmeter for shielding gas? (28)
* floating ball type
* dual gauge type
* regulator type
* two stage type

A
  • floating ball type
78
Q

The term schedule of pipe is used to reference: (3)

  • the percentage of carbon in the pipe
  • the recommended service intended for the pipe
  • the length of pipe with reference to its wall thickness
  • the weight of pipe with reference to its wall thickness
A
  • the weight of pipe with reference to its wall thickness
79
Q

The wall thickness of standard-weight pipe is equal to: (3)
* schedule 20 from 1/2-inch to 10-inch NPS
* schedule 30 from 1/2-inch to 10-inch NPS
* schedule 40 from 1/2-inch to 10-inch NPS
* schedule 80 from 1/2-inch to 8-inch NPS

A
  • schedule 40 from 1/2-inch to 10-inch NPS
80
Q

High wire resistance in the liner and contact tip is likely to cause: (22)
* porosity in the weld
* nesting at the drive rolls
* excessive undercut
* damage to the liner

A
  • nesting at the drive rolls
81
Q

Which filler wire is used with the FCAW process? (23)
* E70T-1
* ER7OU-1
* ER7OS-2
* E70S-1

A
  • E70T-1
82
Q

According to the AWS flux and wire classification F7A3-EL12K what does the 12 define? (25)
* 12 percent carbon content of the wire
* 1.2 percent carbon content of the wire
* 0.12 percent carbon content of the wire
* 0.012 percent carbon content of the wire

A
  • 0.12 percent carbon content of the wire
83
Q

Which of the following aluminum filler metals is used to weld 6061 base metal alloys? (33)
4043
4047
5856
5053

A

4043

84
Q

Final oxide removal of the weld area takes place by: (7)
* using a file
*using solvents
* using a wire brush
* the welding arc

A
  • the welding arc
85
Q

When using SAW, the welding head assembly requires which components to function? (5)

filler wire, wire feed motor, feed roll, wire straightener, torch

feed rolls, flux recovery, and power source

power source, contact tip, and spooled wire

wire feed rolls, gas flowmeter, and a nozzle

A

filler wire, wire feed motor, feed roll, wire straightener, torch

86
Q

What degree of preset is recommended for a 2G welded with GMAW and MCAW? (20)
* 1 to 2 degrees
* 2 to 3 degrees
* 3 to 4 degrees
* 4 to 5 degrees

A
  • 3 to 4 degrees
87
Q

The use of backhand inclination is avoided when using GMAW on aluminum: (11)
* because it causes porosity
* because it produces shallow penetration
* because slag could become trapped in the weld
* because a black soot oxide appears on the surface of the weld

A
  • because a black soot oxide appears on the surface of the weld
88
Q

Wire brushes used for cleaning aluminum, prior to welding should be: (5)
* stainless steel
* low carbon steel

A
  • stainless steel
89
Q

A general rule of thumb is that all GMAW on aluminum should be done with the uphill progression for best overall results. (22)
T/F

A

True

90
Q

What is the recommended technique for a 2G root pass using GMAW short-circuit metal transfer? (21)|
* stringer technique
* weave technique
* sawtooth technique
* drag technique

A
  • sawtooth technique
91
Q

When using GMAW on aluminum, a longer contact tip produces: (5)
* poor wire feed ability
* less efficient current transfer
* an increased chance of burn-back * more efficient current transfer

A
  • more efficient current transfer
92
Q

An advantage that FCAW has over GMAW in the welding industry is: (2)
* wire is less expensive
* deposition rates are higher
* less maintenance on equipment
* the volume of shielding gas used is lower

A
  • deposition rates are higher
93
Q

Shielding gas flow rates are influenced by: (6)
* conduit liner size
* position of the weld
* the polarity used
* the current rating of the gun

A
  • position of the weld
94
Q

Using the jog button to advance the wire into the gun assembly will: (7)
* automatically adjust the break tension
* purge contaminants in the conduit line
* save shielding gas
* prevent the wire from unravelling

A
  • save shielding gas
95
Q

When referencing the wire classification number E491T-6, what does the 1 define? (21)
* weld metal chemistry and properties
* 100,000 pounds minimum tensile strength
* welded in all positions
* welded in the flat position

A
  • welded in all positions
96
Q

A light preheat is beneficial prior to welding aluminum: (10)
* to ensure a hard HAZ
* to ensure a ductile HAZ
* to ensure moisture is eliminated
* to speed up the quench rate of HAZ

A
  • to ensure moisture is eliminated
97
Q

The main benefit of using FCAW or MCAW over GMAW is: (2)
* less fumes are emitted
* less training is required
* more productivity is achieved
* costs are considerably lower

A
  • more productivity is achieved
98
Q

A 3F lap joint, done on 3/8-inch thick plates, welded with the MCAW process could be completed with how many passes when using the triangular welding technique? (27)

1 pass
2 passes
3 passes
4 passes

A

1 pass

99
Q

When performing SAW, excessive wire speed, arc voltage set to low, or insufficient flux coverage could:
(33)
* cause stubbing
* cause burn-back
* require an increased travel speed to compensate
* require special wire to reduce the effects of these deficiencies

A
  • cause stubbing

Welder 1 (40 decks)

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