试题与答案

TB/T2340—2000标准规定，37°和70°探头探测WGT-3试块上φ3×65

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题型：单项选择题

题目：

TB/T2340—2000标准规定，37°和70°探头探测WGT-3试块上φ3×65横通孔，当波高达到80%时的灵敏度余量不小于（）。

A、46dB

B、42dB

C、36dB

D、40dB

答案：

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参考答案：停机

考点：钢轨探伤工考试中级钢轨探伤工中级钢轨探伤工题库
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