2025 CWB 2 All Module Exam New Latest Version
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Decreasing the number of weld beads in a specific weld will:
A) Result in annealing the weld area
B) Give a finer grain structure
C) Reduce the transverse shrinkage
D) Increase the transverse shrinkage
E) Possibly crack the root pass --------- Correct Answer ----------- C) Reduce the transverse
shrinkage
The neutral axis is the:
A) Line on which there will be neither tension nor compression when the piece is flexed or bent
B) Centreline of a weld bead halfway between the root pass and the face pass
C) Outside centreline of the web of a channel
D) Inside corner line of an unequal leg steel angle
E) Dimensional halfway point of a welded assembly --------- Correct Answer ----------- A) Line
on which there will be neither tension nor compression when the piece is flexed or bent
Which of the following processes produce the most of the worlds steel?
A) Electric furnace
B) Blast furnace
C) Open hearth furnace
D) Basic oxygen furnace
E) None of the above --------- Correct Answer ----------- D) Basic oxygen furnace
At what point does the carbon content indicate that the material is no longer steel but cast iron?
A) Beyond 1.7%
B) Beyond 17%
C) Beyond 7.1%
D) Beyond 0.71%
E) Beyond 0.17% --------- Correct Answer ----------- A) Beyond 1.7%
One of the causes of hot shortness in steel is the presence of:
A) High Cobalt
B) High Chromium
C) High Manganese
D) High Sulphur
E) High Silicon --------- Correct Answer ----------- D) High Sulphur
,When expansion and contraction are prevented, heating and cooling may cause:
A) No residual stresses
B) Failure due to lamellar tearing
C) No permanent deformation or failure
D) Failure when the metal is highly ductile
E) Failure when metal is not sufficiently ductile --------- Correct Answer ----------- E) Failure
when metal is not sufficiently ductile
When heated, unrestrained metal will expand:
A) Transversely (across the weld)
B) Volumetrically (in all directions)
C) Until it upsets
D) Longitudinally (lengthwise)
E) Mostly across the width of the weld --------- Correct Answer ----------- B) Volumetrically (in
all directions)
It would be INCORRECT to say that peening:
A) Should not be used on the last pass
B) Puts surface of the weld in compression
C) Should not be used on root passes
D) Can be used to form the surface contour of the weld to the inspector`s satisfaction
E) Should be stopped before the weld surface starts to flake --------- Correct Answer ----------- D)
Can be used to form the surface contour of the weld to the inspector`s satisfaction
To avoid longitudinal bending of a plate when it is being cut to width, you would:
A) Cool the outer edge with an air blast
B) Cut both edges at the same time
C) Dog the plate down away from the cut
D) Pre-bend the plate away from the cut
E) Slow down the cutting speed --------- Correct Answer ----------- B) Cut both edges at the same
time
The rate of energy consumption at which an electric lamp converts electrical energy into heat
and light is given by:
A) Volts x Watts
B) Volts x Amperage
C) Watts x Joules
D) Amperage x Watts --------- Correct Answer ----------- B) Volts x Amperage
High-heat-input welds will typically have:
,A) Large beads and large heat affected zones
B) Large beads and narrow heat affected zones
C) Small beads and large heat affected zones
D) Small beads and small heat affected zones --------- Correct Answer ----------- A) Large beads
and large heat affected zones
Which of the following will have the greatest effect of the metallurgical changes that occur
within the HAZ?
A) The peak temperature reached
B) The welding amperage
C) The welding voltage
D) The contact tip-to-work distance --------- Correct Answer ----------- A) The peak temperature
reached
The final microstructure in the HAZ will depend on the
A) Heat input
B) Inter-pass temperature
C) Preheat
D) All of the above --------- Correct Answer ----------- D) All of the above
Which of the following will reduce the available hydrogen when welding operations are
planned?
A) Preheat
B) A coat of paint on the base material to be welded
C) Moisture on the electrode to be used
D) Grease on the plate surface to be welded --------- Correct Answer ----------- A) Preheat
An example of a low restraint weld is a:
A) Corner joint
B) Set on nozzle
C) Tee joint
D) Fillet weld --------- Correct Answer ----------- D) Fillet weld
The controlled thermal severity test (CTS) uses which type of weld?
A) Corner weld
B) Lap weld
C) Fillet weld
D) Groove weld --------- Correct Answer ----------- C) Fillet weld
Which of the following precautions can be used to minimize the risk of lamellar tearing?
, A) Not allowing partially completed welds to cool
B) A block weld sequence
C) Buttering
D) All of the above --------- Correct Answer ----------- D) All of the above
What does the term "basic" refer to with regards to welding flux?
A) The easily transfer oxygen into the solidifying weld
B) They do not easily transfer oxygen into the solidifying weld
C) They do not contain any alloying elements
D) They only contain carbon as an alloying element --------- Correct Answer ----------- B) They
do not easily transfer oxygen into the solidifying weld
Stress relief temperatures for thick sections occur:
A) Above the material transformation temperature
B) The same as the material transformation temperature
C) Below the material transformation temperature
D) At 723°C for all steel --------- Correct Answer ----------- C) Below the material transformation
temperature
The frequency of the ultrasonic wave:
A) Is set by a knob on the equipment
B) Depends on the transducer selected
C) Is calibrated using an IIW Block
D) Changes as the wave enters the material
E) Reduces as the wave travels through the material --------- Correct Answer ----------- B)
Depends on the transducer selected
To reduce the height of an indication on the screen by 50%, you would turn the gain control (or
attenuator) through:
A) 2dB
B) 50 dB
C) 60 dB
D) 20 dB
E) 6dB --------- Correct Answer ----------- E) 6dB
An ultrasonic beam changes angle (refracts) when it travels from a plastic probe into a steel
specimen because:
A) The wave velocity is different in steel than in plastic
B) The frequency is different in steel than in plastic
C) Only transverse waves can travel in steel
D) The angle does not change
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