ASNT ULTRASONIC LEVEL I EXAM NEWEST 2025 ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+

ASNT ULTRASONIC LEVEL I EXAM NEWEST 2025 ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+ Far boundary indication - CORRECT ANSWER ->The indication on the instrument display that represents the far boundary of the material being tested. Immersion testing - CORRECT ANSWER ->The position of the transducer is often varied to transmit sound into the test part at various angles to the front surface. Coaxial cable - CORRECT ANSWER ->The cable that connects the ultrasonic instrument to the transducer is specially designed so that one conductor is centered inside another. Calibration - CORRECT ANSWER ->The process of comparing an instrument or device with a standard. Compressional wave - CORRECT ANSWER ->Another name for a longitudinal wave. Rayleigh wave - CORRECT ANSWER ->Another name for surface waves. Couplant - CORRECT ANSWER ->A material used between the face of a transducer and the test surface to permit or improve the transmission of ultrasonic vibrations. Piezoelectric material - CORRECT ANSWER ->The material in a transducer that vibrates to produce ultrasonic waves. Ultrasonic testing - CORRECT ANSWER ->Testing of material where the transducer is in direct contact with the material being tested. Lithium sulfate - CORRECT ANSWER ->An advantage of using lithium sulfate in transducers is that it is one of the most efficient generators of ultrasonic energy. Transducer frequency - CORRECT ANSWER ->The transducer that contains the thinnest piezoelectric crystal is a 25 MHz transducer. Beam divergence - CORRECT ANSWER ->The amount of beam divergence from a crystal is primarily dependent on the frequency and crystal size. Refraction - CORRECT ANSWER ->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. Indication A - CORRECT ANSWER ->Represents the initial pulse or front surface indication in Figure 2. Indication B - CORRECT ANSWER ->Represents the first discontinuity indication in Figure 2. Indication C - CORRECT ANSWER ->Represents the second back surface reflection in Figure 2. Indication D - CORRECT ANSWER ->Represents the second indication of the discontinuity in Figure 2. Indication E - CORRECT ANSWER ->Represents the second back surface reflection in Figure 2. Velocity of surface waves - CORRECT ANSWER ->Approximately the velocity of shear waves in the same material. Indication A - CORRECT ANSWER ->The first front surface indication. Indication B - CORRECT ANSWER ->First back surface reflection. Indication C - CORRECT ANSWER ->First discontinuity reflection. Indication D - CORRECT ANSWER ->Second discontinuity indication. Distance between indications A and B - CORRECT ANSWER ->The distance from the front surface of the aluminum block to the discontinuity. Best resolving power frequency - CORRECT ANSWER ->5 MHz. Greatest sound attenuation material - CORRECT ANSWER ->A coarse-grained casting. Entry surface indication in contact testing - CORRECT ANSWER ->The initial pulse. Ultrasonic instrument display pattern with low-level indications - CORRECT ANSWER ->Could be caused by a gas pocket. Test method with two transducers - CORRECT ANSWER ->Through-transmission testing. Number of complete waves in a given period - CORRECT ANSWER ->Frequency of a wave motion. Boundary between two materials - CORRECT ANSWER ->An interface. Longitudinal wave - CORRECT ANSWER ->When the motion of the particles of a medium is parallel to the direction of propagation. Shear wave - CORRECT ANSWER ->When the motion of the particles of a medium is transverse to the direction of propagation. 25 million cycles per second - CORRECT ANSWER ->Can also be stated as 25 MHz. Moving a transducer over a test surface - CORRECT ANSWER ->Scanning. Rate at which sound waves pass through substances - CORRECT ANSWER ->Velocity. Maximum signal height of a vertical indication - CORRECT ANSWER ->Distance amplitude height. Ultrasonic testing technique with non-parallel transducer elements - CORRECT ANSWER ->Angle beam testing. Angle of incidence - CORRECT ANSWER ->Angle 1 (01) in Figure 4. Angle of reflection - CORRECT ANSWER ->Angle 2 (02) in Figure 4. Angle of refraction - CORRECT ANSWER ->Angle 3 (03) in Figure 4. Commercial ultrasonic testing frequencies - CORRECT ANSWER ->Frequencies between 1 and 25 kHz, 1 and 1000 kHz, 0.2 and 25 MHz, or 15 and 100 MHz. Horizontal base line in A-scan - CORRECT ANSWER ->Represents the elapsed time or distance. Vertical indications in A-scan - CORRECT ANSWER ->Represents the amount of ultrasonic sound energy returning to the transducer.