CWI考试试题汇编

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Q9-1 不连续( discontinuity is:) a. 总是一个缺陷(always a defect) b. 总是一个不合格(always a reject) c. 总是可接受的(always acceptable)

d. 如果它超过规范的限制,可拒绝(rejectable if it exceeds code limits) e. 无以上任何一个(none of the above)

Q9-2 一个特别的焊缝不连续是否关键,可以什么为基础进行判断(Whether a particular weld discontinuity is critical can be judged on the basis of: ) a. 是在表面或表面下(whether it is surface or subsurface) b. 是线性的还是非线性的(whether it is linear or nonlinear) c. 是否有尖端(whether it has a sharp end condition) d. 所有上述的(all of the above) e. none of the above

Q9-3 什么样的不连续被认为是很严重的(What discontinuity is generally considered to be the most severe?) a. 气孔(porosity)

b. 不完全熔合(incomplete fusion) c. 夹渣(slag inclusion) d. 裂纹(crack)

e. 引弧斑痕(arc strike)

Q9-4 下列哪种不连续不大可能肉眼发现(Which of the following discontinuities is less likely to be found visually?) a. 焊趾裂toe crack b. 咬边(undercut)

c. 片状撕裂(lamellar tear) d. 焊瘤(overlap)

e. 无以上任何一个(none of the above)

Q9-5 背面焊道裂纹是由下列哪种焊接引起的(Underbead cracks can result from which of the following welding practices?) a. 湿焊条的使用(use of wet electrodes)

b. 在污染的钢上焊接(welding on contaminated steels) c. 在油漆上施焊(welding over paint) d. 所有以上的(all of the above) e. 无以上任何一个(none of the above)

Q9-6 由不适当地中止焊弧所引起的焊缝不连续为(The weld discontinuity that results from improper termination of the welding arc is referred to as: )

a. 咬边(undercut) b. 焊瘤(overlap) c. crater crack

d. 不完全熔合(incomplete fusion) e. 所有以上的(all of the above)

Q9-7 下列哪种工艺不可能在一完成的焊缝中引起夹渣(Of the following processes, which is unlikely to have slag inclusions in a completed weld?) a. 手工电弧焊(SMAW) b. 等离子焊(PAW) c. 药蕊焊(FCAW) d. 埋弧焊(SAW)

e. 无以上任何一个(None of the above)

Q9-8 由在焊缝横截面中留有气体面产生的不连续是(The discontinuity that results form the entrapment of gas within the weld cross section is referred to as: ) a. 裂纹(crack)

b. 夹渣(slag inclusion)

c. 不完全熔合(incomplete fusion) d. 气孔(porosity)

e. 无以上任何一个(none of the above)

Q9-9 当焊工施焊太慢,造成过多的焊接金属流出接头并留在母材表面没有熔化,什么样的焊接不连续会产生(What weld discontinuity results when the welder travels too slowly, causing excess weld metal to flow out of the joint and lay on the base metal surface without fusing?) a. 咬边(undercut) b. 未充满(underfill) c. 焊瘤(overlap)

d. 不完全熔合(incomplete fusion) e. 无以上任何一个(none of the above)

Q9-10 当焊工没有完全填满焊缝坡口时,什么样的焊接金属不无均匀会产生(What weld metal discontinuity results when the welder fails to completely fill the weld groove?)

a. 未充满(underfill) b. 咬边(undercut) c. 焊瘤(overlap)

d. 不完全熔合(incomplete fusion) e. 无以上任何一个(none of the above)

Q9-11 在一带坡口焊缝上堆上过多的焊接金属称为(Excessive weld metal buildup on a groove weld is referred to as:)

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