UT-Ⅲ级方法考试试卷

UT-Ⅲ级方法考试试卷
UT method questions for level Ⅲ
拟题级别审批阅卷
Prepared by Level UT Approved by Corrected by__________姓名成绩
Name Mark______________
(full point is 1.5% per question)
1. A couplant is needed for a test on a hot steel plate (250°F). Which of the following materials can be used?
下列那种材料可用作热钢板（120℃）检验的耦合剂？（）
A.Water
水
B.Mercury
水银
C.tractor oil
机油
D.none of the above
以上都不行。

2. A couplant is needed for a test on stainless steel welds. Numerous Couplant are available. Which should be chosen?
检验不锈钢焊缝，在下列提供的几种耦合剂中，应选择哪一种？（）
A. a couplant free of chlorine
无氯的耦合剂
B.glycerine
甘油
C.oil
油
D.water
水。

3. A 5MHz, 0.5in. diameter, flat search unit in water has a near field length of approximately.
5 MHz, 直径0 .5 吋的直探头，在水中的近场长度大约多长？（）
A.7 in.（英寸）
B. 2 in.（英寸）
C.3-1/3in.（英寸）
D.5-1/2in.（英寸）
4. A concave lens on a transducer will result in the near field in water being
换能器前的凹透镜会使声场在水中的近场长度变成（）。

A.twice as long as with a flat lens.
平透镜的两倍。

B.three times as long as with a flat lens.
平透镜的三倍。

C.the same length as with a flat lens.
与平透镜一样。

D.shorter than with a flat lens.
短于平透镜近场长度。

5. A 10MHz, 0.5in. dia., search unit is placed on steel and acrylic plastic in succession. The beam spread in these two materials is approximately
10MHz, 直径0.5吋的直探头放在钢板上，钢板后紧贴有丙烯树脂塑料。

声束在两种材料中的扩散角约为（）。

A. 3 and 1.5 degrees, respectively.
分别为3°，1.5°。

B. 1.5 and 3 degrees, respectively.
分别为1.5°，3°。

C. equal in the two materials.
在两种材料中相同。

D. less than the beam spread of 15 MHz search unit of the same diameter.
比15MHz 同直径探头扩散角小。

6. In an immersion test of commercially pure titanium plate (C l=6100m/s), an echo pulse from an internal defect is observed 6.56µsec following the front surface echo. How deep is the reflector below the front surface?
钛板（C L= 6100m/s）水浸探伤中，在第一次表面回波后6. 56μs.观测到一个內部缺陷波，求反射体在表面下多深？（）
A.2cm
B.4cm
C.1cm
D.2in.
7. What lens radius of curvature is needed in order to have a 2cm dia., 5MHz transducer focus in water at a distance of 4 cm from the lens face? (CH2O=1490m/s, C lens=2670m/s)
5MHz，直径2cm换能器装有平凹透镜，欲使水中焦距为4cm，透镜曲率半径为多大？（C水=1490m/s，C镜=2670m/s）
A. 1.77cm
B. 3.50cm
C. 3.17in.
D. 2.23in.
8. Two signals were compared in amplitude to each other. The second was found to be 14dB less than the first. This change could have represented a change of
对两个信号的幅度进行对比，发现第二个信号比第一个信号小14dB，这种差异表示波幅的变化是（）。

A.70%FSH to 14%FSH
满屏高70%到14%
B.100%FSH to 50%FSH
满屏高100%到50%
C.100%FSH to 20%FSH
满屏高100%到20%
D. 100%FSH to 25%FSH
满屏高100%到25%
9. Plate thickness=25.4mm,pulse-echo, straight beam measured elapsed time=8µs. What is the most likely material?
板厚为25.4mm，直探头测得的脉冲回波时间为8μs，则板的材料最可能为（）。

A.carbon steel
碳钢
B.lead
铅
C.titanium
钛
D.aluminum
铝
10. The transmitted pulse at the output of the pulser usually has a voltage of 100 to 1000 V, whereas the voltage of the echo at the input of the amplifier are on the order of
脉冲发生器输出端的发射脉冲电压通常为100～000伏，而放大器输入端的回波电压大约只有( )。

A.10 volts.
10伏
B.50 volts.
50伏
C.0.001 to 1 volts.
0.001～1伏
D. 1 to 5 volts.
1～5伏
11.Which of the following might result in increased transmission of ultrasound within a coarse-grained material?
下列哪种方法可增大超声波在粗晶材料的穿透力？（）
A.Perform the examination with a smaller diameter transducer
用直径较小的探头进行检验；
B.Perform the examination after a grain refining treatment
在晶粒细化热处理后进行检验；
C.Change from a contact examination to an immersion examination
将接触法检验改为液浸检验；
E.Change from a longitudinal to a transverse wave
将纵波检验改为横波检验。

12.When material grain size is on the order of( ) wavelength of larger, excessive scattering of the ultrasonic beam may affect test result.
材料晶粒尺寸约大于多少波长时，超声波的散射会影响试验结果？
A. 1
B. 1/2
C. 1/10
D. 1/100
13.The sensitivity of an ultrasonic test system
超声波试验系统的灵敏度（）。

A.depends on the search unit, pulser, and amplifier used.
取决于探头、脉冲发生器和放大器
B.decreases as the frequency is increased.
随频率提高而降低
C.increases as the resolution increases.
随分辨力提高而提高
D.is not related to mechanical damping of the transducer.
与换能器的机械阻尼无关系
14. Search unit sensitivity is most often determined by
确定探头灵敏度最常用的方法是（）。

A.calculations based on frequency and thickness of piezoelectric element
依据频率和压电晶片的厚度进行计算
B.the amplitude of the response from an artificial discontinuity
用来自人工缺陷的回波信号振幅确定
paring it to a similar search unit made by the same manufacture
与同一厂家制造的同种探头进行比较
D.determining the ringing time of search unit
确定探头的振荡时间
15. Notches provide good reference discontinuity when UT examination is conducted to primarily detect defects such as
探测哪种缺陷时可用缺口作为一种良好的参考缺陷？（）
A.porosity in rolled plate.
滚轧板材的疏松
B.inadequate penetration at the root of a weld.
焊缝根部的未焊透
C.weld porosity.
焊缝中的气孔
D.internal inclusion.
内部夹杂
16. The difference between a compression and shear wave is
压缩波和切变波之间的区别是( )。

A.quantitative measure.
定量测量
B.particle direction.
质点振动方向
C.qualititative measure.
定性测量
D.amplitude.
振幅
17. The particle motion for Rayleigh waves is usually described as
瑞利波的质点振动是( )。

A.sinusoidal.
正弦的
B.circular.
圆形的
C.elliptical.
椭圆形的
D.shear.
剪切形的
18. Based upon wave theory and ignoring attenuation losses, the echo amplitude is
按照波动理论，在忽略衰减损耗的情况下，回波振幅（）。

A.directly proportional to the distance to the reflector.
与反射体的距离成正比
B.inversely proportional to the distance to the reflector.
与反射体的距离成反比
C.directly proportional to the square of the distance to the reflector.
与反射体的距离的平方成正比
D.inversely proportional to the square of the distance from the reflector.
与反射体的距离的平方成反比
19. In A-scan equipment, the RF pulser output voltage is normally in the range of
在A扫描设备中，射频脉冲发生器的输出电压一般在什么范围内？（）
A.1–10 volts.
1～10伏
B.10–100 volts.
10～100伏
C.100–1000 volts.
100～1000伏
D.1000–3000 volts.
1000～3000伏
20. As you increase the frequency of a given size transducer,
换能器尺寸不变而频率提高时，（）。

A.the lateral resolution is impaired.
横向分辨力降低
B.the beam divergence increases.
声束扩散角增大
C.the length of the near field increases.
近场长度增大
D.the sensitivity increases.
灵敏度提高
21. Which frequency can best distinguish the difference between a large planar defect and 4 stacked laminations in rolled plate?
下列哪种频率的声波对于区分轧制板材中大平面缺陷和叠层分层缺陷最好？（）
A.0.5MHz
B.1MHz
C. 2.25MHz
D.5MHz
22. The pulse applied to the electrodes of the ultrasonic search unit is
施加于超声波探头电极上的脉冲是（）。

A.electrical.
电信号
B.mechanica.
机械信号
C.electro-mechanical.
电机械信号
D.piezoeletrical.
压电信号
23. Test sensitivity corrections for metal distance and discontinuity area responses are accomplished by using
对于金属距离和缺陷面积响应进行灵敏度修正时，应使用（）。

A.an area/amplitude set of blocks.
面积/振幅试块
B.an area/amplitude and distance /amplitude set of blocks.
面积/振幅和距离/振幅试块
C. a distance/amplitude set of blocks.
距离/振幅试块
D.steel balls of varying diameter.
各种直径的钢球
24. The time from the start of the ultrasonic pulse until the reverberations completely decay limits the maximum usable
从超声脉冲开始发生到振动完全衰减的时间限制了最大可使用的（）。

A.pulse time-flaw rate.
脉冲时间－缺陷速率
B.pulser/receiver rate.
脉冲发生/接收速率
C.pulse repetition rate.
脉冲重复频率
D.modified pulse-time rate.
变更的脉冲－时间速率
25. The resonant frequency of a 2cm thick plate of Naval brass(C=4430m/s) is
2cm厚的Naval黄铜板（C=4430m/s）的共振频率为（）。

A.0.903MHz.
B.0.443MHz.
C.0.222MHz.
D.0.111MHz.
26. Which of the following transducer materials makes the best transmitter?
下列哪种换能器材料作为声发射器最好？（）
A.Quartz
石英
B.Lithium sulfate
硫酸锂
C.Barium titanate
钛酸钡
D.None of the above.
以上都不好
27. Of the transducer materials listed below, the most efficient receiver is
下列哪种换能器材料是最有效的声接收器？（）
A.Quartz.
石英
B.lithium sulfate.
硫酸锂
C.barium titanate.
钛酸钡
D.lead meta-niobate.
偏铌酸锂
28. A typical application of shear waves in ultrasonic testing is inspection of
超声波探伤时，切变波的典型应用是检验（）。

A.welds.
焊缝
B.plate.
板材
C.pipe and tubing.
管材
D.all of the above.
以上都是
29. In angle beam shear wave testing ,skip distance will( ) as the thickness of the test specimen is increased
切变波斜角探伤中，当试样厚度增加时，跨距将（）。

A.decrease
减小
B. not change
不变
C.increase
增加
D.decrease by half with double thickness
厚度加倍，跨距减半
30. The thickness range of UT resonance thickness gages can be increased by
超声波共振测厚仪的测厚范围可以用哪种方法扩大？（）
ing large transducer.
使用大尺寸换能器
B.operating at the fundamental frequency.
在基频上工作
C.operating at a harmonic frequency.
在谐频上工作
D. increase the voltage.
提高电压
31. The ability of transducer to detect echoes from small defects is a definition for
换能器检出小缺陷回波的能力定义为（）。

A.resolution.
分辨力
B. sensitivity.
灵敏度
C.definition.
清晰度
D.gain.
增益
32. From the equation for the length of the near field, it can be determined that the near field can be minimizes by
按照近场长度公式，可以通过哪种方式减少近场长度？（）
A.decreasing water travel distance.
减少水距
B.increasing transducer diameter.
增大换能器直径
C.decreasing the size of reference targets.
减小反射靶尺寸
D.decreasing test frequency.
降低试验频率
33. In a water (C=1500m/s) immersion test, ultrasonic energy is transmitted into steel (C s=3200m/s) at an incident angle of 14°.What is the refracted shear wave within the material?
钢板水浸探伤时，超声波以14°入射角发射到工件中，已知C水=1500m/s，C钢=3200m/s，求钢中的切变波折射角。

（）
A. 13°
B. 35°
C. 31°
D. 53°
34. The acoustic impedance for brass (C=4430m/s, ρ=8.42×103kg/m3) is
黄铜（C=4430m/s，ρ=8.42×103kg/m3）的声阻抗为（）。

A. 5.3×105kg/m2ּs
B.9.4×105kg/m2ּs
C. 1.9×105kg/m2ּs
D.36×105kg/m2ּs
35. The principal attributes that determine the differences in ultrasonic velocities among materials are
造成不同材料中超声波速度差别的主要因素是（）。

A.frequency and wavelength.
频率和波长
B.thickness and travel time.
厚度和传播时间
C.elasticity and density.
弹性和密度
D.Chemistry and permeability.
化学性质和磁导率
36. The term that is used to determine the relative transmittance and reflectance of energy at an interface is called
决定声波在界面上相对透过率和反射率的术语叫做（）。

A.acoustic attenuation.
声衰减
B.interface refraction.
界面折射
C.acoustic impedance ratio.
声阻抗比
D.acoustic frequency.
声频率
37. In general when a discontinuity is thin it is a poor reflector. The maximum reflection is obtained when the thickness of the discontinuity is equal to at least
一般来说，缺陷愈薄，对声波的反射愈差。

当缺陷厚度至少为多大时能得到最大反射？（）
A.one –quarter wavelength.
1/4波长
B.one-half wavelength.
1/2波长
C.one wavelength.
一个波长
D.even multiples of one-half wavelength.
1/2波长的偶数倍
38. Surface waves are reduced to an energy level of approximately 1/25 of the original power at a depth of
表面波能量在多大深度上会降低到原能量的大约1/25？（）
A.one inch.
一英寸
B.four inch.
四英寸
C.one wavelength.
一个波长
D.four wavelengths.
四个波长
39. Increasing the length of the pulse used to activate the search unit will
当激励探头的脉冲长度增加时（）。

A.increase the strength of the ultrasound but decrease the resolving power of the instrument.
超声波强度增大，但仪器分辨力降低
B. increase the resolving power of the instrument.
仪器分辨力提高
C.have no effect on the test.
对试验无影响
D.decrease the penetration power of the sound wave.
声波穿透力降低
40. Angle beam testing of plate will often miss
钢板超声斜角探伤时，常会漏掉（）。

A.crack that are perpendicular to the soundwave.
与声波垂直的裂纹
B.inclusions that are randomly oriented.
方向无规律的夹杂
minations that are parallel to the front surface.
与表面平行的分层
D. a series of small discontinuities.
串状小缺陷
41. When measuring the angle on an angle beam search unit using an IIW block, two signals are noted. The first measures at an angle of 49 degrees and the second peaks at an angle that is estimated to be 25 degrees. Plastic longitudinal velocity=2.76mm/µs; steel shear velocity=3.23mm/µs; longitudinal velocity=5.85mm/µs. Identify signals
用IIW试块（C2L=5.85mm/μm，C2S=3.23mm/μm）测定斜探头（C1L=2.76mm/μm）声束角度时，发现两个信号，第一个测得角度为49°，第二个波峰对应角度为25°，试识别信号（）。

A.first is shear, second is longitudinal.
1为横波，2为纵波
B.first is longitudinal ,second is surface.
1为纵波，2为表面波
C.first is longitudinal ,second is Love wave.
1为纵波，2为乐莆波
D.first is longitudinal, second is shear.
1为纵波，2为横波
42. A search unit with a focal length in water of 4in. is used. A steel plate, 8 in. thick, velocty=0.23in/microsec., is placed at a water path of 2in. from the search unit. At what depth is the focal point in the steel?
使用水中焦距为4英寸的直探头，水浸法检验8英寸厚钢板（C钢=0.23英寸/μs），钢板放在水中距探头2英寸处，焦点在钢中多深？（）
A. 1.0 in.
1.0英寸
B. 2.0 in.
2.0英寸
C.0.5 in.
0.5英寸
D.0.8 in.
0.8英寸
43. In a tandem 70 degree pitch-catch shear wave arrangement, the plate being inspected is 2 in. thick and the region of interest is midway between top and bottom surfaces. How far behind the transmitter should the receiving transducer be located?
两个70°横波探头按串列法布置，检验厚度2英寸板材，检验关注的是上，下表面间中心部位。

接收探头应置于发射探头后多远？（）
A. 0.68 in.
0.68.英寸
B. 1.88 in.
1.88英寸
C. 4.00 in.
4.00英寸
D. 5.50 in.
5.50英寸
44. During an examination, an indication of 25%FSH is detected and maximized on the CRT. For better analysis the gain is increased by 12dB, and the indication increases to 88%FSH.What value should have been reached and what is the apparent problem?
检验中，探测到一个最大波幅为满屏高25%的信号。

为便于分析，将增益提高12dB，信号增加到满屏高的88%，问信号应该增加到多高？出现了什么问题？（）
A.50%FSH and the screen is nonlinear
满屏高50%，荧屏非线性
B.75%FSH and there is no problem
满屏高75%，不存在问题
C.100%FSH and the sweep speed is nonlinear
满屏高100%，扫描速度非线性
D.100%FSH and the screen is nonlinear
满屏高100%，荧屏非线性
45. The reflected pulse reaching the immersion transducer from the back surface of a 4.5in. aluminum plate standing in a tank of water is equal to( ) of the energy pulse which was transmitted from the transducer.( ZAl=17, ZH2O=1.5 )
水浸法检验放于水箱中的4.5英寸厚的铝板( ZAl=17, ZH2O=1.5 )，铝板底面回波反射至探头，其声能为探头发射脉冲能量的百分之多少？（）
A. 6.3%
B.70%
C.50%
D.21%
46. In contact testing , the back surface signal from a 2 in. plate was set at full screen height. Passing over a coarse grained area, the back surface signal dropped to 10 percent of the full scale signal. What would be your estimate of the change in attenuation in this local area?
接触法检验2英寸厚的板材，底波信号调整为满屏高，检验中，通过一个粗晶区，底波降低为10%FSH，试估计在这个局部区域衰减的变化多大？（）
A.20dB/in.
B.10dB/in.
C. 5 dB/in
D.10%/in.
47. A single Vee, butt weld in a 3 in. plate is being examined using a 60o shear wave. An indication on the CRT appears at a sound path distance of 9 in.. At the same time the exit point of the transducer is 7.8in..from the centerline of the weld. This suggests the reflector could be
采用60°横波检验板厚3英寸单V坡口的对接焊缝。

荧光屏上显示一声程为9英寸的信号，此时探头入射点至焊缝中心线的距离（探头焊缝距离）为7.8英寸，反射体应估判为（）。

A. a crack in the near side HAZ.
探头侧热影响区裂纹
B. lack of fusion at the weld/base material interface.
焊缝/母材界面上的未熔合
C. a slag inclusion in the far side of the weld.
焊缝中心的夹杂
D. an undercut condition on the far side of the weld.
探头对侧焊缝的咬边
48. Under the condition above, but with the indication at a 6In. Sound path distance and with the exit point 5.2In. From the weld centerline an other strong indication is received indicating a probable reflector in the ( ) the weld.
按上述条件，如接收到另一个很强的信号，声程为6英寸，探头焊缝距离为5.2英寸，表明在什么部位可能有反射体？
A.root area of
根部
B.crown area of
盖面区
C.midsection of
中部
D. base metal adjacent
邻近的母材区
49. Under the conditions above, but with the indication at a sound path distance of 9 in. and with the exit point 8.1 in. from the weld centerline, the reflector lies in a plane that is ( )in. from the center of the weld.
按上题条件，信号的声程为9英寸，探头焊缝距离为8.1英寸，则反射体所处的平面离焊缝中心线（）英寸。

A.0.1 ( on the far side )
0.1（探头远侧）
B.0.3 ( on the near side )
0.3（探头近侧）
C.0.3 ( on the far side )
0.3（探头远侧）
D.0.5 ( on the near side ).
0.5（探头近侧）
50. Under the condition above, the reflector is at a depth of
按上题条件，反射体的深度为（）。

A. 1.5 in.
B. 1.0 in.
C. 2.0 in.
D. 2.25 in.
51. In a thick-walled piping weld inspection, the counter-bore on the ID reflects the incident 45-degree shear wave so that it strikes the top surface at normal incidence. In order for this to happen , the taper on the counter-bore must be
在厚壁管道焊缝探伤中，内壁镗孔斜坡面，会对入射横波产生反射，如45的横波刚好被反射到垂直入射至上表面，则坡面与底面夹角应为（）。

A.30 degree.
30°
B.45 degree.
45°
C.11.25 degree.
11.25°
D.22.5 degree.
22.5°
52. Under the above condition, an L-wave is internally mode converted at an angle with the sinγ giving by
按上题条件，也会以γ角形成转换的纵波，则sinγ由公式（）给出。

A. sinγ=(CL/CS)sin(incident angle).
sinγ=(CL/CS)sin(入射角)
B. sinγ=(CL/CS)sin45 degree.
sinγ=(CL/CS)sin45°
C. sinγ=(CL/CS)sin90 degree.
sinγ=(CL/CS)sin90°
D. sinγ=4sin45(incident angle).
sinγ=4sin(入射角)
53. A1.5 in. butt weld is to be examined from both sides using a 70-degree shear wave. The scan program calls for being able to inspect 3 legs (1.5 V ee paths). Weld access for completing this pattern will require( )plus the physical dimensions of the transducer assembly.
采用70°横波从焊缝两侧检验1.5英寸厚对接焊缝，前后扫查可以作到三次波（1.5倍V声程）探伤，为完成这样的扫查，焊缝每侧接近距离（探头移动区）应为（），再加上探头组件的几何尺寸。

A. 4.5 in.
B.8.24 in.
C.12.36 in.
D.24.73 in.
54. The sound path sweep setting on the 10 division CRT for the above case should be
荧光屏上声程扫描调节为10个分格，按上题情况，每分格应为（）。

A. 1.35 in./div.
B. 1.00 in./div.
C. 1.25 in./div.
D.0.50 in/div.
55. Three major sources of noise which interfere with the signals on the CRT are
超声波现场检验中，干扰荧光屏信号的三个主要噪声源是（）。

A.front surface roughness, hydraulic motors, and enlarged grain structure.
检测面粗糙、水压机、粗晶组织
B.back surface roughness, electric motors, and decreased grain structure.
底面粗糙、电动机、细晶组织
C.depth, size and location of defect.
缺陷的深度、尺寸和位置
D.front surface roughness ,arc welding operation, and enlarged grain structure.
检测面粗糙、弧焊操作、粗晶组织
56. Reference standards are to be constructed from materials that( ).(Art.5 section V ASME Code )
制作参考试块（校准试块）的材料应（）。

A.came from the same heat as the test parts
与被检工件热处理相同
B.have a similar metallurgical structure as the test parts
与被检工件具有相似的金相组织
C.are the same material specification ,grade, and heat treatment as parts
与被检工件有相同的材料规范、等级和热处理
D.are of same thickness as the test parts
与被检工件厚度相同
57. Scanning practices call for transducer positions to
超声波检验中，扫查时要求怎么样移动探头？( )
A.be from two orthogonal direction.
从两个互相垂直的方向扫查
B.overlap each other by 10persent.
相邻轨迹的复盖率要达到10%
C.never scan at rates in excess of 6 in/sec..
扫查速度永不超过6英寸/秒
D.None of the above.
以上都不对
58. Evaluation of examination results shall be performed in accordance with
超声波检验结果的评定应依据（）。

A.the section V art.5.
Ⅴ卷第5章
B.the referencing Code section.
规范相关章节
C.the written procedure.
书面规程
D.all of the above.
以上全部
59. The ultrasonic instrument shall utilize an amplitude control accurate over its useful range to ( ) of the nominal amplitude ratio.
探伤仪增益控制器线性误差不应大于公称幅度比值的（）。

A.±5%
B.±10%
C.±20%
D.±1dB
60. Evaluating the amplitude control linearity shall be performed in accordance with the procedure provided in ( ) of Art.5.
应利用5章附录（）的规程，评定增益控制器线性。

A.App.Ⅰ
附录Ⅰ
B.App.Ⅱ
附录Ⅱ
C.App. A
附录A
D.App. B
附录B
61. The scanning shall be performed at a gain setting at least ( )times the primary reference level.
探伤灵敏度至少应为参考灵敏度的（）倍，即比参考线高（）dB。

A. 4 ( 12dB )
B. 2 ( 6dB )
C. 5 ( 14dB )
D. 10 ( 20dB )
62. The beam angle in the production materials shall be in the range of
焊缝检验中，采用的探头折射角的范围为（）。

A.45°～75°.
B.45°～60°.
C.35°～70°.
D.only 45°.仅45°。

63. The reference level for evaluating discontinuities shall be
评定缺陷的灵敏度是( )。

A.Primary reference level.
参考线灵敏度
B.80% of full screen height.
满幅的80%
C.20% of reference level.
20%参考线灵敏度
D.50% of full screen height.
满幅的50%
64. An imperfection that produce an amplitude greater than 50% of reference level and that is interpreted to be incomplete penetration shall be evaluated as
一个缺陷，其波幅大于50%参考线，并被解释为未焊透，该缺陷应评定为（）。

A.rejectable.
不合格
B.subject to evaluation after measured the length of indication.
先测定指示长度，再评定
C.Need only maintain a record.
只须做记录
D.Acceptable.
合格
65. The responsibilities for the NDE level Ⅱ should be（）.( SNT-TC-1A )
NDE Ⅱ级人员的职责是（）。

A. preparing written instruction and reporting the results of NDE
编制检验工艺卡、出检验报告
B. Interpreting &evaluating examination results with applicable code, standard & specification
依据相应的法规、标准、技术条件、解释和评定检验结果
C. training & guidance of level I personnel
培训和指导Ⅰ级人员
D. all of the above.
以上全部。