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CWB 2 All Module Exams Questions And Verified Answers (A+ Graded)
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CWB 2 All Module Exams Questions And VerifiedAnswers (A+ Graded)
A Plasma is:
A) A gas composed of positive ions and free electrons
B) A liquid used to prevent spatter from adhering
C) The major element in an inverter power source
D) Found in all electrical circuit - Answer A) A gas composed of positive ions and free
electrons
What polarity will give the maximum melting rate (burn-off rate) when the SMAW process
is used?
A) DCEP
B) ACEP
C) DCEN
D) ACEP - Answer C) DCEN
What welding power source type does the SMAW process use?
A) Constant Current
B) Constant Voltage
C) Pulsed Current
D) Pulsed Voltage - Answer A) Constant Current
The drooping welding power source is designed for:
,A) Constant voltage regardless of the current demand
B) Constant arc length regardless of current
C) Nearly constant current regardless of voltage fluctuations
B) Low open circuit voltage - Answer C) Approximately constant current independent of
voltage variations
A self-regulating welding arc is obtained from a:
A) Constant current power source operating a wire feed system with a constant speed
drive
B) Constant voltage power source using a wire feed system with voltage sensing
C) Constant current power source
D) Constant voltage power source with a constant speed wire feed system - Answer D)
Constant voltage power source with a constant speed wire feed system
Short circuit current is depended on the:
A) Voltage in the circuit
B) Static characteristic of the power source
C) Position of welding
D) Skill of the welder - Answer B) Static characteristic of the power source
A Transformer is a device that:
A) Transforms AC to DC
B) Works only to change a DC voltage
C) Changes the value of an AC voltage but does not change the frequency
, D) Is made from a semiconductor - Answer C) Changes the value of an AC voltage but
does not change the frequency
A Rectifier is a device that converts:
A) DC current to AC current
B) AC Current to a high value DC current
C) DC current to a high value DC current
D) AC current to DC current - Answer D) AC current to DC current
Microprocessor controls are used in the more modern welding power sources to:
A) Provide more sophisticated levels of control for the welding system
B) Allow welding variables to be stored for use later
C) Provide feedback control
D) All of the above - Answer D) All of the above
Inverter welding power sources have more control of the welding arc because they:
A) Utilize feedback control
B) Can act very quickly to compensate for any change in the welding circuit
C) Can utilize complex waveforms that allow spray transfer out-of-position
D) All of the above - Answer D) All of the above
It would be correct to say the
A) Expansion and contraction are proportional to the dimensions of the heated area
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