**ASNT ULTRASONIC LEVEL I EXAM 2025 | NEWEST VERSION | COMPLETE QUESTION SET WITH ACCURATE & COMPREHENSIVE VERIFIED ANSWERS | 100% CORRECT | GRADED A+**

ASNT ULTRASONIC LEVEL I EXAM 2025 | NEWEST VERSION | COMPLETE QUESTION SET WITH ACCURATE & COMPREHENSIVE VERIFIED ANSWERS | 100% CORRECT | GRADED A+ The indication on the instrument display that represents the far boundary of the material being tested is called: the back surface reflection. In immersion testing, the position of the transducer is often varied by a manipulator to transmit sound into the test part at various angles to the front surface. Such a procedure is referred to as: angulation. The technical name for the cable that connects the ultrasonic instrument to the transducer is: conduit. The process of standardizing an instrument or device by using a reference standard is called: calibration. Another name for a compressional wave is: longitudinal wave Another name for Rayleigh waves is: surface waves A material used between the face of a transducer and the test surface to permit or improve the transmission of ultrasonic vibrations from the transducer to the material being tested is called: couplant The piezoelectric material in a transducer that vibrates to produce ultrasonic waves is called a: crystal Ultrasonic testing of material where the probe is in direct contact with the material being tested may be: straight beam testing An advantage of using lithium sulfate in transducers is that it: is one of the most efficient receivers of ultrasonic energy. The transducer shown in figure 1 is used for: straight beam testing The transducer that contains the thinnest piezoelectric crystal is: a: 1 MHz b: 5 MHz c: 15 MHz d: 25 MHz 25mhz The amount of beam divergence from a crystal is primarily dependent on the: frequency and crystal size Penetration of ultrasonic waves in a material is normally the function of test frequency used. The greatest depth of penetration is provided by a frequency of a: 1 MHz b: 2.25 MHz c: 5 MHz d: 10 Mhz 1 Mhz When an ultrasonic beam passes through the interface between two dissimilar materials at an angle, a new angle of sound travel takes place in the second material due to: refraction Figure 2 illustrates a contact test on. 203mm (8 in) aluminum block. A discontinuity is located 152mm (6in) from the front surface. The display representation for this is shown to the right. What does indication A represent? A. The initial pulse or front surface indication B. the first discontinuity indication C. The first back surface reflection D. Baseline The initial pulse or front surface indication In figure 2, indication B represents: A: the initial pulse or front surface indication B. the first discontinuity indication C: the first back-surface reflection D: baseline the first discontinuity indication In figure 2, indication C represents the: A: second back surface reflection B: first discontinuity indication C: second indication of the discontinuity D: first back surface reflection first back surface reflection In figure 2, indication D represents the: A: first discontinuity indication B: second indication of the discontinuity C: first back-surface reflection D: second back-surface reflection second indication of the discontinuity In figure 2, indication E represents the: A: first discontinuity indication B: second indication of the discontinuity C: first back-surface reflection D: second back-surface reflection second back surface reflection The velocity of longitudinal waves is approximately ________ the velocity of shear waves in the same material. two times Figure 3 illustrates an immersion test of a 76 mm (3 in) block of aluminum with a discontinuity located 51 mm (2 in) below the surface. The display pattern is shown also. What does indication A represent? Assume no sweep delay is used. A: first front surface indication B: the initial pulse C: the first discontinuity indication D: the first back-surface indication The initial pulse In figure 3, indication B represents the: A: first front surface indication B: the initial pulse C: the first discontinuity indication D: the first back-surface indication First front surface indication In figure 3, indication C represents: A: first front surface indication B: first discontinuity indication C: first back-surface reflection D: second front surface indication first discontinuity indication In figure 3, indication D represents the: A: first discontinuity indication B: first back surface reflection C: second front surface indication D: second discontinuity indication first back surface reflection In figure 3, the distance between indications A and B represents the: Water distance from the transducer to the block Under most circumstances, which of the following frequencies would result in the best resolving power? 1 MHz 5 MHz 10 MHz 25 MHz 25 MHz Which of the following materials of the same alloy is most likely to produce the greatest amount of sound attenuation over a given distance? A hand forging. A coarse grained casting. An extrusion. The attenuation is equal in all materials. A coarse grained casting In contact testing, the entry surface indication is sometimes referred to as the: initial pulse An ultrasonic instrument display pattern containing a large number of low level indications (often referred to as grass or hash) could be caused by: A: a crack B: a large inclusion C: coarse grained material D: a gas pocket coarse grained material A test method employing two separate transducers on opposite surfaces of the material being tested is called: through transmission testing (ttu) The number of complete waves that pass a given point in a given period of time (usually 1s) is referred to as the: frequency The boundary between two different materials that are in contact with each other is called: an interface