ASME的无损检测Ⅱ级人员考题和答案(RT) .pdfVIP

射线II级基础理论试卷

RTLevelIIGeneralExamination

姓名：答卷时间：地点：

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得分：评卷人：时间：

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1.Ｘ射线管中，轰击靶的电子运动速度取决于：(C)

A)阴极材料的原子序数B)灯丝材料的原子序数

C)阴极和阳极之间的电位差D)整流电路的电流

ThevelocityofelectronsstrikingthetargetinanX-raytubeisafunctionof:

A)theatomicnumberofthecathodematerial

B)theatomicnumberofthefilamentmaterial

C)thevoltagedifferencebetweenthecathodeandanode

D)thecurrentflowintherectifiercircuit

2.哪种源发出的射线其穿透力最大？(C)

A)钴60B)220kVpＸ射线管C)15MeV回旋加速器D)铱192发射的电子

Ofthefollowing,thesourceprovidingthemostpenetratingradiationis:

A)cobalt-60B)220kVpX-raytube

C)15MeVX-raybetatronD)electronsfromiridium-192

3.铱192源适用的厚度极限约为：(B)

A)2英寸钢或当量厚度B)4英寸钢或当量厚度

C)15/2英寸钢或当量厚度D)11英寸钢或当量厚度

Aniridium-192gamma-raysourcehasanapproximatepracticalthicknesslimitof:

A)2inchesofsteeloritsequivalentB)4inchesofsteeloritsequivalent

C)15/2inchesofsteeloritsequivalentD)11inchesofsteeloritsequivalent

4.单色Ｘ射线束：(D)

A)是用来产生高对比度射线照片的窄射线束B)也叫做多频Ｘ射线束

C)是只含有标识射线的Ｘ射线束D)是由单一波长射线组成的Ｘ射线束

AmonochromaticX-raybeam:

A)isanarrowbeamusedtoproducehighcontrastradiographs.

B)isalsoreferredtoasaheterogeneousX-raybeam.

C)is