CWB 2 ALL MODULE EXAM
QUESTIONS |GUARANTEED
ACCURATE ANSWERS |COMPLETE!!
A Plasma is:
A) A gas made up of positive ions and free electrons
B) A liquid used to reduce adherence of spatter
C) The main component in an inverter power source
D) Always present in an electrical circuit - Accurate Answers✔✔✔ A) A
gas made up of positive ions and free electrons
To increase melting rate (burn-off rate) in the shielded metal arc welding
(SMAW) process, which polarity should be used?
A) DCEP
B) ACEP
C) DCEN
D) ACEP - Accurate Answers✔✔✔ C) DCEN
Which type of welding power source is used for the SMAW process?
A) Constant Current
B) Constant Voltage
,C) Pulsed Current
D) Pulsed Voltage - Accurate Answers✔✔✔ A) Constant Current
The purpose of a drooping welding power source is to produce:
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 - Accurate Answers✔✔✔ C) Nearly
constant current regardless of voltage fluctuations
A self-regulating welding arc is produced by a:
A) Constant current power source with a constant speed wire feed
system
B) Constant voltage power source with a voltage sensing wire feed
system
C) Constant current power source
D) Constant voltage power source with a constant speed wire feed
system - Accurate Answers✔✔✔ D) Constant voltage power source
with a constant speed wire feed system
Short circuit current is determined by the:
A) Voltage in the circuit
,B) Static characteristic of the power source
C) Position of welding
D) Skill of the welder - Accurate Answers✔✔✔ 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 - Accurate Answers✔✔✔ 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 - Accurate Answers✔✔✔ 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 - Accurate Answers✔✔✔ D) All of the above
Inverter welding power sources provide increased control over the
welding arc because they:
A) Utilize feedback control
B) Can respond very quickly to correct any changed in the welding
circuits
C) Can utilize advanced pulsed waveforms to allow out of position
welding using spray transfer
D) All of the above - Accurate Answers✔✔✔ D) All of the above
It would be correct to say:
A) Expansion and contraction are proportional to the dimensions of the
heated area
B) When a bar is heated under restraint, its stress relieves itself as it
cools
C) Slow cooling of a heated area will provide the greatest amount of
shrinkage
QUESTIONS |GUARANTEED
ACCURATE ANSWERS |COMPLETE!!
A Plasma is:
A) A gas made up of positive ions and free electrons
B) A liquid used to reduce adherence of spatter
C) The main component in an inverter power source
D) Always present in an electrical circuit - Accurate Answers✔✔✔ A) A
gas made up of positive ions and free electrons
To increase melting rate (burn-off rate) in the shielded metal arc welding
(SMAW) process, which polarity should be used?
A) DCEP
B) ACEP
C) DCEN
D) ACEP - Accurate Answers✔✔✔ C) DCEN
Which type of welding power source is used for the SMAW process?
A) Constant Current
B) Constant Voltage
,C) Pulsed Current
D) Pulsed Voltage - Accurate Answers✔✔✔ A) Constant Current
The purpose of a drooping welding power source is to produce:
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 - Accurate Answers✔✔✔ C) Nearly
constant current regardless of voltage fluctuations
A self-regulating welding arc is produced by a:
A) Constant current power source with a constant speed wire feed
system
B) Constant voltage power source with a voltage sensing wire feed
system
C) Constant current power source
D) Constant voltage power source with a constant speed wire feed
system - Accurate Answers✔✔✔ D) Constant voltage power source
with a constant speed wire feed system
Short circuit current is determined by the:
A) Voltage in the circuit
,B) Static characteristic of the power source
C) Position of welding
D) Skill of the welder - Accurate Answers✔✔✔ 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 - Accurate Answers✔✔✔ 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 - Accurate Answers✔✔✔ 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 - Accurate Answers✔✔✔ D) All of the above
Inverter welding power sources provide increased control over the
welding arc because they:
A) Utilize feedback control
B) Can respond very quickly to correct any changed in the welding
circuits
C) Can utilize advanced pulsed waveforms to allow out of position
welding using spray transfer
D) All of the above - Accurate Answers✔✔✔ D) All of the above
It would be correct to say:
A) Expansion and contraction are proportional to the dimensions of the
heated area
B) When a bar is heated under restraint, its stress relieves itself as it
cools
C) Slow cooling of a heated area will provide the greatest amount of
shrinkage
