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CWB 2 Visual Weld Inspector Exam with complete solution 2024_2025.
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CWB 2 Visual Weld Inspector Exam with complete solution 2024_2025.
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CWB 2 Visual Weld Inspector Exam withcomplete solution 2024/2025
A consumable electrode is: - ANSWER- AN electrode which melts and provides
metal to fill the joint
The weld heat affected zone is: - ANSWER- the 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 - ANSWER- electricity 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 - ANSWER- increases as the
square of the current causing smaller and smaller droplets to be detached
The electric current for welding must be transformed from - ANSWER- High
voltage, low amperage to low voltage, high amperage
The major advantage of electron beam welding process is - ANSWER- full
penetration welds on thick material in one pass
The progress of welding with Electroslag welding process is - ANSWER- Vertical
up
Explosion welding - ANSWER- is 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 - ANSWER- joining of rails
,Welding without filler metal with GTAW process is referred to as - ANSWER-
autogenous welding
A typical weld flaw associated with GTAW process is - ANSWER- porosity
SMAW power sources typically have a volt-ampere curve that is - ANSWER-
drooping
Once a box of E49XX low hydrogen electrodes has been opened the electrodes
may remain at ambient temperature for up to a maximum of - ANSWER- 4 hours
Shielded Metal ARC Welding (SMAW) process - ANSWER- establishes an arc
between the end of a covered electrode and the work piece.
The spray mode of metal transfer is achieved with - ANSWER- high amperage,
high voltage and argon-rich shielding gas
digital wire feeders - ANSWER- have feedback systems to maintain the preset
wire feed speed
wire designated by CSA standard W48 as an E491T-9MJ-H8 - ANSWER- Results in
weld deposit with a maximum of 8 ml diffusible hydrogen per 100 g of weld metal
Self shield flux cored wires are - ANSWER- better able to tolerate air currents
The AWS classes metal cored wire along with - ANSWER- solid wires
SAW Fluxes that significantly influence the composition of the weld metal
through slag/metal reactions are called - ANSWER- active
Resistance welding of aluminum - ANSWER- Can 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 - ANSWER- GTAW
For a flat weld profile and good penetration profile using the MCAW process -
ANSWER- 15 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 - ANSWER- decreasing tip to work distance without
adjusting any other variable will cause a increase in deposition rate
Electrode stick out is measured - ANSWER- From tip of nozzle to end of electrode
Contact tip-to-work is the sum (CTTW) - ANSWER- of the electrode extension and
arc length
Increasing electrical sickout - ANSWER- decreases 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 - ANSWER- Spray transfer
Which welding process for GMAW has excessive spatter - ANSWER- Globular
transfer
Which welding process for GMAW usually has lack of fusion - ANSWER- Short
Circuit
what electrodes never go in holding or baking oven - ANSWER- cellulosic
Submerged Arc Welding disadvantage - ANSWER- Requires inter-pass and post
weld slag removal
What welding process has the greatest HAZ - ANSWER- Electroslag
GTAW when a BALL is formed on Tungsten - ANSWER- Aluminum
Which welding process can be done outside Earth's atmosphere - ANSWER-
Diffusion
With tungsten arc, most of the current across the arc is carried by - ANSWER-
electrons
Electrode beam welding has - ANSWER- a very narrow weld and heat affected
zone
Which gases are used with the GMAW process - ANSWER- argon and CO2 and
their mixtures in various proportions
, Which welding process is non-consumable electrode process - ANSWER- GTAW
Which shielding gas does GMAW use for spray transfer - ANSWER- 95% Argon
and 5% CO2
The deposition rate of SMAW electrodes is increased by including - ANSWER-
Iron Power
Electrode in Flux cored are welding is - ANSWER- Tubular wire containing flux or
other ingredients
What welding process is not used in overhead position - ANSWER- SAW
(Submerged Arc Welding
SAW Fluxes that significantly influence the composition of the weld metal
through slag/metal reactions are called - ANSWER- are classified in conjunction
with welding wire forming a flux designation
A welding arc consists of a - ANSWER- high current and low voltage
The heat of the welding arc is used to - ANSWER- locally melt the base material
and filler material to create fusion upon solidification
Welding using GTAW process with current set to DCEN - ANSWER- 30% 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
- ANSWER- provide a gas shield, slag covering, scavengers, arc stabilization and
additional alloying elements
The temperature for holding low hydrogen electrodes - ANSWER- 120 C
The GMAW process uses (Blank) to shield the molten weld from the atmosphere -
ANSWER- external shielding gas
The flux cored arc welding is an arc welding process usually in the semi-
automatic mode, consisting of: - ANSWER- A 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
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