ASME的无损检测Ⅱ级人员考题和答案(RT).pdf

射线II级基础理论试卷 RT Level II General Examination 姓名： 答卷时间： 地点： Name Time Location 得分： 评卷人： 时间： Marks Examiner Date 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 The velocity of electrons striking the target in an X-ray tube is a function of: A) the atomic number of the cathode material B) the atomic number of the filament material C) the voltage difference between the cathode and anode D) the current flow in the rectifier circuit 2. 哪种源发出的射线其穿透力最大？ ( C ) A) 钴60 B) 220kVp Ｘ射线管 C) 15MeV 回旋加速器 D) 铱192发射的电子 Of the following, the source providing the most penetrating radiation is: A) cobalt-60 B) 220kVp X-ray tube C) 15MeV X-ray betatron D) electrons from iridium-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 An iridium-192 gamma-ray source has an approximate practical thickness limit of: A) 2 inches of steel or its equivalent B) 4 inches of steel or its equivalent C) 15/2 inches of steel or its equivalent D) 11 inches of steel or its equivalent 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