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CWB 2 All Module Exams QUESTIONS AND ANSWERS RATED A+ 2024/2025
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CWB 2 All Module Exams QUESTIONS AND ANSWERS RATED A+ 2024/2025
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CWB 2 All Module ExamsA Plasma is:
A) A fuel made from fantastic ions and loose electrons
B) A liquid used to lessen adherence of spatter
C) The principal element in an inverter electricity supply
D) Always found in an electrical circuit - ANSA) A fuel made of nice ions and loose electrons
To growth melting fee (burn-off fee) inside the shielded metallic arc welding (SMAW) system,
which polarity should be used?
A) DCEP
B) ACEP
C) DCEN
D) ACEP - ANSC) DCEN
Which form of welding strength supply is used for the SMAW manner?
A) Constant Current
B) Constant Voltage
C) Pulsed Current
D) Pulsed Voltage - ANSA) Constant Current
The reason of a drooping welding electricity supply is to provide:
A) Constant voltage regardless of the current call for
B) Constant arc length irrespective of modern-day
C) Nearly steady contemporary regardless of voltage fluctuations
B) Low open circuit voltage - ANSC) Nearly steady current regardless of voltage fluctuations
A self-regulating welding arc is produced via a:
A) Constant modern-day electricity source with a consistent velocity twine feed system
B) Constant voltage power source with a voltage sensing cord feed system
C) Constant contemporary strength source
D) Constant voltage strength supply with a regular speed wire feed system - ANSD) Constant
voltage energy supply with a steady speed wire feed system
Short circuit modern-day is decided by the:
A) Voltage in the circuit
B) Static function of the energy source
,C) Position of welding
D) Skill of the welder - ANSB) Static feature of the strength supply
A Transformer is a tool that:
A) Transforms AC to DC
B) Works only to alternate a DC voltage
C) Changes the fee of an AC voltage but does no longer trade the frequency
D) Is made from a semiconductor - ANSC) Changes the cost of an AC voltage but does not
trade the frequency
A Rectifier is a tool that converts:
A) DC modern-day to AC contemporary
B) AC Current to a excessive cost DC modern-day
C) DC modern to a excessive fee DC present day
D) AC modern-day to DC current - ANSD) AC modern to DC current
Microprocessor controls are used inside the extra modern welding strength sources to:
A) Provide extra state-of-the-art levels of manage for the welding device
B) Allow welding variables to be saved to be used later
C) Provide comments manage
D) All of the above - ANSD) All of the above
Inverter welding electricity resources offer increased control over the welding arc due to the fact
they:
A) Utilize feedback manipulate
B) Can respond right away to correct any modified inside the welding circuits
C) Can utilize superior pulsed waveforms to allow out of position welding the use of spray switch
D) All of the above - ANSD) All of the above
It would be correct to mention:
A) Expansion and contraction are proportional to the size of the heated area
B) When a bar is heated below restraint, its strain relieves itself as it cools
C) Slow cooling of a heated vicinity will offer the best amount of shrinkage
D) When steel is heated it expands, but it does not pull away to its original length when it cools -
ANSA) Expansion and contraction are proportional to the dimensions of the heated region
To reduce the amount of angular distortion you ought to:
A) Increase the journey pace
, B) Reduce the angle of preparation
C) Pre-heat the metallic
D) All of the above
E) None of the above - ANSD) All of the above
When a structural member has been bent sharply, it can be straightened with the aid of heating:
A) A vee formed phase of the internet underneath the bent region of the flange
B) The inner corner of an perspective, channel, i-beam, or T bar
C) A vee fashioned area on the factor of the finest bend, with the pinnacle of the vee on the
factor of finest bend
D) All alongside the threshold of the segment
E) All alongside the edge opposite of the only that is bent - ANSC) A vee fashioned area on the
factor of the greatest bend, with the pinnacle of the vee at the factor of best bend
Of the numerous mechanical approach of controlling distortion, the subsequent could have the
least residual stress:
A) Rigid clamping
B) Subassembly of the sections
C) Heavy strongbacks, welded on both facets of the joint
D) Similar weldments clamped lower back to back
E) Pre-set the plates to allow recuperation of angular distortion - ANSE) Pre-set the plates to
permit recuperation of angular distortion
Decreasing the number of weld beads in a particular weld will:
A) Result in annealing the weld place
B) Give a finer grain structure
C) Reduce the transverse shrinkage
D) Increase the transverse shrinkage
E) Possibly crack the root bypass - ANSC) Reduce the transverse shrinkage
The impartial axis is the:
A) Line on which there could be neither anxiety nor compression while the piece is flexed or
bent
B) Centreline of a weld bead halfway among the root pass and the face bypass
C) Outside centreline of the net of a channel
D) Inside nook line of an unequal leg metallic attitude
E) Dimensional halfway factor of a welded assembly - ANSA) Line on which there can be
neither tension nor compression while the piece is flexed or bent
When expansion and contraction are prevented, heating and cooling may additionally purpose:
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