ASNT ULTRASONIC LEVEL I EXAM QUESTIONS WITH DETAILED VERIFIED ANSWERS

ASNT ULTRASONIC LEVEL I EXAM QUESTIONS
WITH DETAILED VERIFIED ANSWERS

The indication on the instrument display that represents the far boundary of the
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material being tested. - CORRECT ANSWER✔✔-Far boundary indication
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The position of the transducer is often varied to transmit sound into the test part
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at various angles to the front surface. - CORRECT ANSWER✔✔-Immersion testing
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The cable that connects the ultrasonic instrument to the transducer is specially
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designed so that one conductor is centered inside another. - CORRECT
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ANSWER✔✔-Coaxial cable |




The process of comparing an instrument or device with a standard. - CORRECT
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ANSWER✔✔-Calibration


Another name for a longitudinal wave. - CORRECT ANSWER✔✔-Compressional
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wave


Another name for surface waves. - CORRECT ANSWER✔✔-Rayleigh wave
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A material used between the face of a transducer and the test surface to permit
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or improve the transmission of ultrasonic vibrations. - CORRECT ANSWER✔✔-
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Couplant

,The material in a transducer that vibrates to produce ultrasonic waves. - CORRECT
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ANSWER✔✔-Piezoelectric material
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Testing of material where the transducer is in direct contact with the material
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being tested. - CORRECT ANSWER✔✔-Ultrasonic testing
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An advantage of using lithium sulfate in transducers is that it is one of the most
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efficient generators of ultrasonic energy. - CORRECT ANSWER✔✔-Lithium sulfate
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The transducer that contains the thinnest piezoelectric crystal is a 25 MHz
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transducer. - CORRECT ANSWER✔✔-Transducer frequency
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The amount of beam divergence from a crystal is primarily dependent on the
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frequency and crystal size. - CORRECT ANSWER✔✔-Beam divergence
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When an ultrasonic beam passes through the interface between two dissimilar
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materials at an angle, a new angle of sound travel takes place in the second
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material. - CORRECT ANSWER✔✔-Refraction
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Represents the initial pulse or front surface indication in Figure 2. - CORRECT
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ANSWER✔✔-Indication A |




Represents the first discontinuity indication in Figure 2. - CORRECT ANSWER✔✔-
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Indication B |

, Represents the second back surface reflection in Figure 2. - CORRECT
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ANSWER✔✔-Indication C |




Represents the second indication of the discontinuity in Figure 2. - CORRECT
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ANSWER✔✔-Indication D |




Represents the second back surface reflection in Figure 2. - CORRECT
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ANSWER✔✔-Indication E |




Approximately _________ the velocity of shear waves in the same material. -
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CORRECT ANSWER✔✔-Velocity of surface waves
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The first front surface indication. - CORRECT ANSWER✔✔-Indication A
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First back surface reflection. - CORRECT ANSWER✔✔-Indication B
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First discontinuity reflection. - CORRECT ANSWER✔✔-Indication C
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Second discontinuity indication. - CORRECT ANSWER✔✔-Indication D
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The distance from the front surface of the aluminum block to the discontinuity. -
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CORRECT ANSWER✔✔-Distance between indications A and B
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5 MHz. - CORRECT ANSWER✔✔-Best resolving power frequency
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