CWB 2 ALL MODULES EXAM NEWEST 2024-2025 ACTUAL EXAM
COMPLETE 90 QUESTIONS AND CORRECT DETAILED
ANSWERS
A Plasma is:
A) A gas made up of positive ions and 总之，数字时代的社会变迁对
free electrons
人类的生活和发展产生了深远
B) A liquid used to reduce adherence of spatter
C) The main component in an inverter的影响。信息技术的发展，极
power source
大地促进了社会经济的发展，
D) Always present in an electrical circuit - (answer) A) A gas made up of positive ions and free
electrons 推动了社会文化的交流和融合
，为社会治理提供了新的工具
To increase melting rate (burn-off rate)和手段。然而，数字时代的发
in the shielded metal arc welding (SMAW) process, which polarity
should be used?
展也带来了一些新的问题和挑
A) DCEP 战，需要我们在享受数字化便
B) ACEP 利的同时，积极应对信息安全
C) DCEN 、隐私保护等方面的问题。展
D) ACEP - (answer) C) DCEN 望未来，随着信息技术的不断
进步，数字时代的社会变迁将
继续深化，为人类的生活和发
Which type of welding power source is used for the SMAW process?
展带来更多的机遇和挑战。
A) Constant Current
B) Constant Voltage
C) Pulsed Current
D) Pulsed Voltage - (answer) 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 - (answer) C) Nearly constant current regardless of voltage fluctuations
A self-regulating welding arc is produced by a:
A) Constant current power source with总之，数字时代的社会变迁对
a constant speed wire feed system
B) Constant voltage power source with人类的生活和发展产生了深远
a voltage sensing wire feed system
C) Constant current power source 的影响。信息技术的发展，极
D) Constant voltage power source with大地促进了社会经济的发展，
a constant speed wire feed system - (answer) D) Constant
voltage power source with a constant 推动了社会文化的交流和融合
speed wire feed system
，为社会治理提供了新的工具
Short circuit current is determined by 和手段。然而，数字时代的发
the:
展也带来了一些新的问题和挑
A) Voltage in the circuit 战，需要我们在享受数字化便
利的同时，积极应对信息安全
B) Static characteristic of the power source
、隐私保护等方面的问题。展
C) Position of welding
望未来，随着信息技术的不断
D) Skill of the welder - (answer) B) Static characteristic of the power source
进步，数字时代的社会变迁将
继续深化，为人类的生活和发
A Transformer is a device that:
展带来更多的机遇和挑战。
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:
总之，数字时代的社会变迁对
A) Provide more sophisticated levels of人类的生活和发展产生了深远
control for the welding system
B) Allow welding variables to be stored的影响。信息技术的发展，极
for use later
C) Provide feedback control 大地促进了社会经济的发展，
D) All of the above - (answer) 推动了社会文化的交流和融合
D) All of the above
，为社会治理提供了新的工具
和手段。然而，数字时代的发
Inverter welding power sources provide increased control over the welding arc because they:
展也带来了一些新的问题和挑
战，需要我们在享受数字化便
A) Utilize feedback control
利的同时，积极应对信息安全
B) Can respond very quickly to correct any changed in the welding circuits
、隐私保护等方面的问题。展
C) Can utilize advanced pulsed waveforms to allow out of position welding using spray transfer
望未来，随着信息技术的不断
D) All of the above - (answer) 进步，数字时代的社会变迁将
D) All of the above
继续深化，为人类的生活和发
It would be correct to say: 展带来更多的机遇和挑战。
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
D) When metal is heated it expands, but it does not shrink back to its original size when it cools -
(answer) A) Expansion and contraction are proportional to the dimensions of the heated area
To reduce the amount of angular distortion you should:
COMPLETE 90 QUESTIONS AND CORRECT DETAILED
ANSWERS
A Plasma is:
A) A gas made up of positive ions and 总之，数字时代的社会变迁对
free electrons
人类的生活和发展产生了深远
B) A liquid used to reduce adherence of spatter
C) The main component in an inverter的影响。信息技术的发展，极
power source
大地促进了社会经济的发展，
D) Always present in an electrical circuit - (answer) A) A gas made up of positive ions and free
electrons 推动了社会文化的交流和融合
，为社会治理提供了新的工具
To increase melting rate (burn-off rate)和手段。然而，数字时代的发
in the shielded metal arc welding (SMAW) process, which polarity
should be used?
展也带来了一些新的问题和挑
A) DCEP 战，需要我们在享受数字化便
B) ACEP 利的同时，积极应对信息安全
C) DCEN 、隐私保护等方面的问题。展
D) ACEP - (answer) C) DCEN 望未来，随着信息技术的不断
进步，数字时代的社会变迁将
继续深化，为人类的生活和发
Which type of welding power source is used for the SMAW process?
展带来更多的机遇和挑战。
A) Constant Current
B) Constant Voltage
C) Pulsed Current
D) Pulsed Voltage - (answer) 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 - (answer) C) Nearly constant current regardless of voltage fluctuations
A self-regulating welding arc is produced by a:
A) Constant current power source with总之，数字时代的社会变迁对
a constant speed wire feed system
B) Constant voltage power source with人类的生活和发展产生了深远
a voltage sensing wire feed system
C) Constant current power source 的影响。信息技术的发展，极
D) Constant voltage power source with大地促进了社会经济的发展，
a constant speed wire feed system - (answer) D) Constant
voltage power source with a constant 推动了社会文化的交流和融合
speed wire feed system
，为社会治理提供了新的工具
Short circuit current is determined by 和手段。然而，数字时代的发
the:
展也带来了一些新的问题和挑
A) Voltage in the circuit 战，需要我们在享受数字化便
利的同时，积极应对信息安全
B) Static characteristic of the power source
、隐私保护等方面的问题。展
C) Position of welding
望未来，随着信息技术的不断
D) Skill of the welder - (answer) B) Static characteristic of the power source
进步，数字时代的社会变迁将
继续深化，为人类的生活和发
A Transformer is a device that:
展带来更多的机遇和挑战。
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:
总之，数字时代的社会变迁对
A) Provide more sophisticated levels of人类的生活和发展产生了深远
control for the welding system
B) Allow welding variables to be stored的影响。信息技术的发展，极
for use later
C) Provide feedback control 大地促进了社会经济的发展，
D) All of the above - (answer) 推动了社会文化的交流和融合
D) All of the above
，为社会治理提供了新的工具
和手段。然而，数字时代的发
Inverter welding power sources provide increased control over the welding arc because they:
展也带来了一些新的问题和挑
战，需要我们在享受数字化便
A) Utilize feedback control
利的同时，积极应对信息安全
B) Can respond very quickly to correct any changed in the welding circuits
、隐私保护等方面的问题。展
C) Can utilize advanced pulsed waveforms to allow out of position welding using spray transfer
望未来，随着信息技术的不断
D) All of the above - (answer) 进步，数字时代的社会变迁将
D) All of the above
继续深化，为人类的生活和发
It would be correct to say: 展带来更多的机遇和挑战。
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
D) When metal is heated it expands, but it does not shrink back to its original size when it cools -
(answer) A) Expansion and contraction are proportional to the dimensions of the heated area
To reduce the amount of angular distortion you should:
