CWB 2 Visual Weld Inspector Exam
A consumable electrode is: - AnswerAN electrode which melts and provides metal
to fill the joint
The weld heat affected zone is: - Answerthe portion of the base metal adjacent to
the weld metal whose properties have been changed due to the heat of welding
When an arc is formed between two electrodes - Answerelectricity flows from
negative cathode to positive anode
The magnetic pinch force helps in the process of the detaching the molten metal drops
from the electrode tip. The magnetic force - Answerincreases as the square of the
current causing smaller and smaller droplets to be detached
The electric current for welding must be transformed from - AnswerHigh voltage, low
amperage to low voltage, high amperage
The major advantage of electron beam welding process is - Answerfull penetration
welds on thick material in one pass
The progress of welding with Electroslag welding process is - AnswerVertical up
Explosion welding - Answeris solid state process in which coalescence is produced
through high speed impacting of two or more materials by controlled detonation
A typical application for thermite welding is - Answerjoining of rails
Welding without filler metal with GTAW process is referred to as -
Answerautogenous welding
A typical weld flaw associated with GTAW process is - Answerporosity
SMAW power sources typically have a volt-ampere curve that is - Answerdrooping
Once a box of E49XX low hydrogen electrodes has been opened the electrodes may
remain at ambient temperature for up to a maximum of - Answer4 hours
Shielded Metal ARC Welding (SMAW) process - Answerestablishes an arc between
the end of a covered electrode and the work piece.
,The spray mode of metal transfer is achieved with - Answerhigh amperage, high
voltage and argon-rich shielding gas
digital wire feeders - Answerhave feedback systems to maintain the preset wire feed
speed
wire designated by CSA standard W48 as an E491T-9MJ-H8 - AnswerResults in
weld deposit with a maximum of 8 ml diffusible hydrogen per 100 g of weld metal
Self shield flux cored wires are - Answerbetter able to tolerate air currents
The AWS classes metal cored wire along with - Answersolid wires
SAW Fluxes that significantly influence the composition of the weld metal through
slag/metal reactions are called - Answeractive
Resistance welding of aluminum - AnswerCan be done but with greater difficulty due
to its low resistivity
The plasma arc welding process is similar to what other welding process in principles of
operation - AnswerGTAW
For a flat weld profile and good penetration profile using the MCAW process -
Answer15 degree travel angle using push technique should be used
What is the effect of tip to work distance (electrical sickout on deposition rate of
submerged are welding - Answerdecreasing tip to work distance without adjusting
any other variable will cause a increase in deposition rate
Electrode stick out is measured - AnswerFrom tip of nozzle to end of electrode
Contact tip-to-work is the sum (CTTW) - Answerof the electrode extension and arc
length
Increasing electrical sickout - Answerdecreases voltage, decreases current and
increases resistance
Which welding process for GMAW has large weld pool and is rather large and difficult to
control out of position - AnswerSpray transfer
,Which welding process for GMAW has excessive spatter - AnswerGlobular transfer
Which welding process for GMAW usually has lack of fusion - AnswerShort Circuit
what electrodes never go in holding or baking oven - Answercellulosic
Submerged Arc Welding disadvantage - AnswerRequires inter-pass and post weld
slag removal
What welding process has the greatest HAZ - AnswerElectroslag
GTAW when a BALL is formed on Tungsten - AnswerAluminum
Which welding process can be done outside Earth's atmosphere - AnswerDiffusion
With tungsten arc, most of the current across the arc is carried by - Answerelectrons
Electrode beam welding has - Answera very narrow weld and heat affected zone
Which gases are used with the GMAW process - Answerargon and CO2 and their
mixtures in various proportions
Which welding process is non-consumable electrode process - AnswerGTAW
Which shielding gas does GMAW use for spray transfer - Answer95% Argon and
5% CO2
The deposition rate of SMAW electrodes is increased by including - AnswerIron
Power
Electrode in Flux cored are welding is - AnswerTubular wire containing flux or other
ingredients
What welding process is not used in overhead position - AnswerSAW (Submerged
Arc Welding
SAW Fluxes that significantly influence the composition of the weld metal through
slag/metal reactions are called - Answerare classified in conjunction with welding
wire forming a flux designation
A welding arc consists of a - Answerhigh current and low voltage
, The heat of the welding arc is used to - Answerlocally melt the base material and
filler material to create fusion upon solidification
Welding using GTAW process with current set to DCEN - Answer30% arc heat at
the electrode and 70% arc heat at the work
The function of the ingredients in the electrode coating of SMAW electrodes is to -
Answerprovide a gas shield, slag covering, scavengers, arc stabilization and
additional alloying elements
The temperature for holding low hydrogen electrodes - Answer120 C
The GMAW process uses (Blank) to shield the molten weld from the atmosphere -
Answerexternal shielding gas
The flux cored arc welding is an arc welding process usually in the semi-automatic
mode, consisting of: - AnswerA constant current power supply, a continuous speed
wire feeder, a welding gun, and a continuous filler metal electrode with a hallow core
containing flux and other ingredients
Welding is process a joining process that by definition requires application of -
AnswerEither heat or pressure
Name the two main methods of arc shielding - Answerflux shielding and gas
shielding
Which direction do the electrons flow in an electrical are - AnswerCathode to anode
In are welding, the electric are is intensely hot with temperature exceeding -
Answer30,000 C
How does the arc voltage and arc stiffness change when the arc length is increased -
AnswerArc voltage increases and arc stiffness decreases
What type of penetration and weld width can be expected when using DC positive
(GTAW) - AnswerShallow penetration and a wide weld
A consumable electrode is: - AnswerAN electrode which melts and provides metal
to fill the joint
The weld heat affected zone is: - Answerthe portion of the base metal adjacent to
the weld metal whose properties have been changed due to the heat of welding
When an arc is formed between two electrodes - Answerelectricity flows from
negative cathode to positive anode
The magnetic pinch force helps in the process of the detaching the molten metal drops
from the electrode tip. The magnetic force - Answerincreases as the square of the
current causing smaller and smaller droplets to be detached
The electric current for welding must be transformed from - AnswerHigh voltage, low
amperage to low voltage, high amperage
The major advantage of electron beam welding process is - Answerfull penetration
welds on thick material in one pass
The progress of welding with Electroslag welding process is - AnswerVertical up
Explosion welding - Answeris solid state process in which coalescence is produced
through high speed impacting of two or more materials by controlled detonation
A typical application for thermite welding is - Answerjoining of rails
Welding without filler metal with GTAW process is referred to as -
Answerautogenous welding
A typical weld flaw associated with GTAW process is - Answerporosity
SMAW power sources typically have a volt-ampere curve that is - Answerdrooping
Once a box of E49XX low hydrogen electrodes has been opened the electrodes may
remain at ambient temperature for up to a maximum of - Answer4 hours
Shielded Metal ARC Welding (SMAW) process - Answerestablishes an arc between
the end of a covered electrode and the work piece.
,The spray mode of metal transfer is achieved with - Answerhigh amperage, high
voltage and argon-rich shielding gas
digital wire feeders - Answerhave feedback systems to maintain the preset wire feed
speed
wire designated by CSA standard W48 as an E491T-9MJ-H8 - AnswerResults in
weld deposit with a maximum of 8 ml diffusible hydrogen per 100 g of weld metal
Self shield flux cored wires are - Answerbetter able to tolerate air currents
The AWS classes metal cored wire along with - Answersolid wires
SAW Fluxes that significantly influence the composition of the weld metal through
slag/metal reactions are called - Answeractive
Resistance welding of aluminum - AnswerCan be done but with greater difficulty due
to its low resistivity
The plasma arc welding process is similar to what other welding process in principles of
operation - AnswerGTAW
For a flat weld profile and good penetration profile using the MCAW process -
Answer15 degree travel angle using push technique should be used
What is the effect of tip to work distance (electrical sickout on deposition rate of
submerged are welding - Answerdecreasing tip to work distance without adjusting
any other variable will cause a increase in deposition rate
Electrode stick out is measured - AnswerFrom tip of nozzle to end of electrode
Contact tip-to-work is the sum (CTTW) - Answerof the electrode extension and arc
length
Increasing electrical sickout - Answerdecreases voltage, decreases current and
increases resistance
Which welding process for GMAW has large weld pool and is rather large and difficult to
control out of position - AnswerSpray transfer
,Which welding process for GMAW has excessive spatter - AnswerGlobular transfer
Which welding process for GMAW usually has lack of fusion - AnswerShort Circuit
what electrodes never go in holding or baking oven - Answercellulosic
Submerged Arc Welding disadvantage - AnswerRequires inter-pass and post weld
slag removal
What welding process has the greatest HAZ - AnswerElectroslag
GTAW when a BALL is formed on Tungsten - AnswerAluminum
Which welding process can be done outside Earth's atmosphere - AnswerDiffusion
With tungsten arc, most of the current across the arc is carried by - Answerelectrons
Electrode beam welding has - Answera very narrow weld and heat affected zone
Which gases are used with the GMAW process - Answerargon and CO2 and their
mixtures in various proportions
Which welding process is non-consumable electrode process - AnswerGTAW
Which shielding gas does GMAW use for spray transfer - Answer95% Argon and
5% CO2
The deposition rate of SMAW electrodes is increased by including - AnswerIron
Power
Electrode in Flux cored are welding is - AnswerTubular wire containing flux or other
ingredients
What welding process is not used in overhead position - AnswerSAW (Submerged
Arc Welding
SAW Fluxes that significantly influence the composition of the weld metal through
slag/metal reactions are called - Answerare classified in conjunction with welding
wire forming a flux designation
A welding arc consists of a - Answerhigh current and low voltage
, The heat of the welding arc is used to - Answerlocally melt the base material and
filler material to create fusion upon solidification
Welding using GTAW process with current set to DCEN - Answer30% arc heat at
the electrode and 70% arc heat at the work
The function of the ingredients in the electrode coating of SMAW electrodes is to -
Answerprovide a gas shield, slag covering, scavengers, arc stabilization and
additional alloying elements
The temperature for holding low hydrogen electrodes - Answer120 C
The GMAW process uses (Blank) to shield the molten weld from the atmosphere -
Answerexternal shielding gas
The flux cored arc welding is an arc welding process usually in the semi-automatic
mode, consisting of: - AnswerA constant current power supply, a continuous speed
wire feeder, a welding gun, and a continuous filler metal electrode with a hallow core
containing flux and other ingredients
Welding is process a joining process that by definition requires application of -
AnswerEither heat or pressure
Name the two main methods of arc shielding - Answerflux shielding and gas
shielding
Which direction do the electrons flow in an electrical are - AnswerCathode to anode
In are welding, the electric are is intensely hot with temperature exceeding -
Answer30,000 C
How does the arc voltage and arc stiffness change when the arc length is increased -
AnswerArc voltage increases and arc stiffness decreases
What type of penetration and weld width can be expected when using DC positive
(GTAW) - AnswerShallow penetration and a wide weld
