Nondestructive Testing (NDT) UT Level II Practice Test

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• What term describes the gradual loss of sonic energy as ultrasonic vibrations travel through a material?
• Ultrasonic waves or vibrations are defined as sound waves of frequency greater than approximately how many Hertz?
• What information can be derived from a B-scan in ultrasonic testing?
• What may cause indications during a surface wave test?
• What is the function of sound velocity in ultrasonic testing?
• In straight beam pulse echo testing, how does a discontinuity with a rough reflecting surface affect the detected signal compared to a smooth flat-bottom hole?
• Which circuit electronically amplifies return signals from the receiving transducer?
• When inspecting coarse-grained materials, which frequency is likely to generate the most scattered sound wave?
• Which of the following improves resolution in ultrasonic testing?
• Which wave type is most affected by surface irregularities during ultrasonic testing?
• What type of ultrasonic examination uses wheel-type search units that eliminate the use of a tank?
• What is the typical inspection environment for ultrasonic testing?
• Which display provides information on the distance of a discontinuity from the transducer?
• What does the term "gain" refer to in ultrasonic testing?
• What primary factor impacts the resolution in ultrasonic testing?
• Which technique is described as "through-transmission ultrasonic testing"?
• Which of the following is a factor that can affect the accuracy of ultrasonic testing?
• What happens to the wavelength of a longitudinal mode wave when a 5.0 MHz transducer is substituted for a 2.25 MHz transducer?
• What is the principal effect of increased grain size in materials during ultrasonic testing?
• In immersion testing, maximum reflection from the entry surface indicates what?
• What is an advantage of automated ultrasonic testing (AUT)?
• In ultrasonic testing, what is the function of a wedge?
• What does the "time-of-flight" principle in ultrasonic testing measure?
• Define the term "false indication" in ultrasonic testing.
• Most commercial ultrasonic testing is accomplished using frequencies between?
• What is the significance of "acoustic impedance"?
• Which mode of vibration has the greatest velocity when all other factors are equal?
• Which material property affects the speed of sound during ultrasonic testing?
• Which factor does not typically affect the performance of ultrasonic testing?
• What does the indication on the display screen that shows the far boundary of the material being tested signify?
• What instrument is typically used to display results in ultrasonic testing?
• What type of wave is created when the motion of particles of a medium is transverse to the direction of propagation?
• What could cause a screen pattern with a large number of low-level indications, often referred to as "hash"?
• What is the primary purpose of a couplant in ultrasonic testing?
• Which couplant is most commonly used in immersion testing?
• What is one effect of using a wetting agent in immersion testing?
• Which circuit coordinates the operation of the entire ultrasonic instrument system?
• What does a higher attenuation typically indicate about the test material?
• What can be concluded from an absence of indications in an ultrasonic test?
• What is the significance of "dead zone" in ultrasonic testing?
• What is the primary purpose of using a couplant in ultrasonic testing?
• Which of the following can be a result of poor signal integrity during ultrasonic testing?
• What is the main characteristic of longitudinal waves?
• What is "size estimation" in the context of ultrasonic testing?
• How often should ultrasonic testing equipment be calibrated?
• What is the primary characteristic of Rayleigh waves?
• What type of testing does not allow for the determination of the depth of a discontinuity?
• What is the key difference between contact and immersion ultrasonic testing?
• Which system modification primarily enhances the signal for better clarity in ultrasonic testing?
• Which display type is characterized by a plot of signal amplitude versus time?
• What are some advantages of immersion testing?
• What term describes the factor that determines reflection or transmission of ultrasonic energy at an interface?
• How are numerous small indications on the display screen described?
• Which term describes artifacts that can appear during ultrasonic scanning due to high pulse repetition rates?
• What is the function of a couplant in ultrasonic testing?
• What effect does a rough entry surface echo condition have on ultrasonic testing?
• Why is operator training important in ultrasonic testing?
• Which type of ultrasonic testing method is commonly used for measuring thickness?
• What type of date presentation is most likely used with a high-speed automatic scanning system?
• What automatically happens to the ultrasonic signal when it reflects off the back surface of a material?
• To change the wavelength of sound used in testing, which parameter should be adjusted?
• What is the term for moving a search unit over a test surface, either manually or automatically?
• In ultrasonic testing, the term "back reflection" refers to what?
• Which parameter is essential to consider when interpreting ultrasonic testing results?
• What does "backsound" refer to in ultrasonic testing?
• The term 'velocity ratio' commonly refers to the relationship between which types of waves?
• What is another name for Rayleigh waves?
• What is the term for the boundary between two different materials in contact?
• In ultrasonic testing, what does the term "attenuation" refer to?
• Entry surface resolution in an ultrasonic testing system defines its ability to detect what?
• What are special curved adapters used to focus sound in a transducer called?
• What is a significant benefit of using ultrasonic testing in industrial applications?
• For angle beam testing, what is a common use of special wedges?
• What role does a transducer play in ultrasonic testing?
• In ultrasonic testing, what does the term "reflection" refer to?
• What aspect of ultrasonic testing does the B-scan presentation focus on?
• Name a common application of ultrasonic testing.
• What type of holes do reference holes in standard aluminum area-amplitude ultrasonic test blocks contain?
• During testing by the surface wave method, what may patches of oil or dirt on the surface cause?
• What is referred to when varying the position of the search unit in immersion testing?
• In ultrasonic testing, a reflectivity is mainly determined by which factor?
• What is the component in an immersion tank that spans the width of the tank called?
• What is the main advantage of using ultrasonic testing over other nondestructive testing methods?
• What can excessive echo ringing lead to in ultrasonic testing?
• What must be ensured when calibrating ultrasonic testing equipment?
• What is the relationship between the angle of incidence and the angle of reflection?
• The velocity of surface waves is approximately what fraction of the velocity of shear waves in the same material?
• In addition to other functions, a probe manipulator in a mechanical immersion scanning unit permits which of the following?
• What is the primary purpose of using reference blocks in ultrasonic testing?
• Which circuits modify the return signal from the receiving transducer?
• What type of waves are produced by a transducer during ultrasonic testing?
• When frequency is increased in a material with a given velocity, what happens to the wavelength?
• Which frequency is generally considered low frequency for ultrasonic testing?
• Which of the following affects the amplitude of ultrasonic signals?
• What does a B-scan display illustrate in ultrasonics?
• Which of the following displays is primarily used for volumetric imaging in ultrasonic testing?
• Which of the following is NOT a purpose of immersion testing?
• What is the minimum water path in immersion testing related to the thickness of the test piece?
• What type of signal does a fiber optics probe primarily use in ultrasonic testing?
• What potential health risks should operators be aware of during ultrasonic testing?
• What is one of the benefits of using shear waves in ultrasonic testing?
• What function does a pulser serve in ultrasonic testing?
• What do we call metal blocks that contain holes to simulate discontinuities?
• Laminar type flaws with major dimensions parallel to the rolled surface are best found using which type of contact testing method?
• In contact testing, what is the entry surface indication sometimes referred to as?
• What effect does the temperature of the material have on ultrasonic testing?
• What is the name given to a time base line on the viewing screen of ultrasonic testing instruments?
• What factors could lead to echo signal distortion during ultrasonic testing?
• Which type of ultrasonic testing involves the search unit being in direct contact with the material being tested?
• What is the term for a test method employing two separate search units on opposite surfaces of the material being tested?
• Which search unit frequency would contain the thickest crystal?
• Why is a return echo important in ultrasonic testing?
• What is the term for a test method where the parts are placed in a water bath?
• What is the primary function of the pulser circuit in an ultrasonic instrument?
• What is "velocity" in the context of ultrasonic testing?
• In an A-scan presentation, the horizontal base line represents what?
• The velocity of sound in a material is primarily dependent on what factor?
• Which wave is primarily responsible for the transmission of sound in liquids?
• For conducting effective tests, how should the sound beam contact a discontinuity?
• What is a common method for estimating defect size in ultrasonic testing?
• Ultrasonic data presented in a form representative of the cross-section of the test specimen is called what?
• What is the technical name for the cable used to connect the ultrasonic instrument to the search unit?
• What type of ultrasonic waves have elliptical particle motion and travel along a material's surface?
• What formula is used to calculate the angle of refraction in a material?
• What frequency will produce the shortest wavelength in ultrasound testing?
• Assuming the same 'Q' factor, which frequency provides the best resolving power?
• What is the process of comparing an instrument with a standard called?
• What type of display shows a signal both above and below the sweep line in ultrasonic testing?
• What is the difference between straight beam and angle beam ultrasonic testing?
• Why is the skill of an operator crucial in ultrasonic testing?
• If the velocity of a longitudinal mode wave is 0.625 cm/microsecond at 1/2 inch below the surface, what is the velocity at 2 inches below the surface?
• When the motion of particles in a medium is parallel to the direction of propagation, what type of wave is generated?
• How does ultrasonic testing generate sound waves?
• Which of the following factors can affect the accuracy of ultrasonic testing results?
• In ultrasonic testing, why is echo signal amplitude important?
• Which reflective characteristic is crucial for effective immersion testing?
• Which material is most likely to produce the greatest sound attenuation over a given distance?
• What is the primary purpose of reference blocks in ultrasonic testing?
• Which ultrasonic testing method would you expect to use when you want to provide automated scanning?
• When is a reference standard used in ultrasonic testing?
• How does "damping" improve ultrasonic transducer performance?
• In ultrasonic testing, which of the following is true regarding the echo received from a discontinuity?
• In immersion testing, what is the purpose of adding a wetting agent to the water?
• What is a noted disadvantage of ultrasonic testing?
• What is the role of the coupling medium in ultrasonic testing?
• What is "gain" in ultrasonic testing?
• How does the operator improve their interpretation of ultrasonic data?
• What is defined as the number of complete waves passing a given point in a second?
• What does the term 'echogenicity' refer to in ultrasonic testing?
• What characterizes "shear waves" in ultrasonic testing?
• What is another name for a compression wave?
• What is typically the primary goal of conducting ultrasonic testing?
• What adjustment must be made to evaluate discontinuities oriented at an angle to the entry surface?
• What type of materials can ultrasonic testing be performed on?
• What does "DAC" stand for in ultrasonic testing?
• In the context of ultrasonic testing, what does "LCR" stand for?
• A plan view display or recording of a part under examination is known as what?
• What can cause irrelevant indications on the ultrasonic display screen?
• Which of the following materials is most likely to generate a high frequency in ultrasonic testing?
• What are "indications" in the context of ultrasonic testing?
• A search unit with three or more individual elements is known as what?
• What does the term "time-of-flight" refer to in ultrasonic testing?
• In a basic UT test pattern (A-scan) for contact testing, the initial pulse represents what?
• Which of the following is a characteristic of immersion testing?
• When performing ultrasonic testing, what is often observed from a flaw in the material?
• Which term describes the ability of an ultrasonic testing system to differentiate between entry surface response and responses of nearby discontinuities?
• What does it mean when a vertical indication reaches the maximum signal height that can be displayed on an ultrasonic instrument?
• What could lead to an increase in the noise level during ultrasonic testing?
• Which type of wave is primarily utilized in ultrasonic testing?
• For discontinuity geometries other than flat, how does the echo amplitude compare to that of a flat defect?
• Which of the following best describes "immersion testing"?
• Why is calibration vital in ultrasonic testing?
• What is attenuation in the context of ultrasonic testing?
• What happens to ultrasonic waves when they enter a denser material from a less dense material?
• What is one of the main challenges associated with detecting flaws using shear waves?
• What is the term for the phenomenon that occurs when an ultrasonic wave changes direction at a boundary between materials with different velocities?
• What is "multi-channel ultrasonic testing"?
• What is the term for ultrasonic waves transmitted into and received from test material in repetitive bursts?
• In ultrasonic testing, what does the term "signal integrity" refer to?
• What is the significance of using the correct frequency in ultrasonic testing?
• What does a decrease in echo amplitude indicate when evaluating discontinuities in materials?
• The relationship of variables in ultrasonic testing can be summarized by which acronym?
• How can "25 million cycles per second" be expressed?
• The interference field near the transducer's face is commonly referred to as what?
• Which of the following is a common transducer type used in ultrasonic testing?
• What scanning technique allows for thorough inspection of large areas in ultrasonic testing?
• An ultrasonic testing technique in which the transducer is not parallel to the test surface is called?
• When the incident angle is between the first and second critical angles, what ultrasonic wave mode will be observed?
• What information does a C-scan typically display in an ultrasonic test?
• What types of flaws can ultrasonic testing detect?
• What is another name for the Fresnel Zone in ultrasonic testing?
• A liquid coupling medium is used in ultrasonic testing to facilitate what?
• What is the primary purpose of Ultrasonic Testing (UT) in Nondestructive Testing?
• Which circuit generates a burst of energy which is applied to the sending crystal?
• What issue may arise if a contact ultrasonic instrument is set with an excessively high pulse repetition rate?
• Which adjustment can help in improving signal visibility during ultrasonic testing?
• In ultrasonic testing terminology, what type of wave is used primarily for scanning applications?
• What property primarily dictates the behavior of ultrasonic waves at material interfaces?
• What type of search units use a plastic wedge or standoff between the transducer and test piece?
• What is the purpose of using different frequencies in ultrasonic testing?
• Which type of wave does ultrasonic testing primarily utilize?
• In which medium can ultrasonic vibrations be propagated only in the longitudinal mode?
• What is the purpose of a material used between the face of a search unit and the test surface?
• During ultrasonic testing by the immersion method, why is it necessary to angulate the search unit?
• Why is managing backsound important in ultrasonic testing?
• What occurs to the velocity of ultrasonic waves as the frequency of the wave increases?
• What is the role of frequency in ultrasonic testing?
• In a 6-inch thick aluminum plate, how will a discontinuity parallel to the surface at 3 inches be best detected?
• What does "refraction" refer to in ultrasonic testing?
• What is the most common type of data display used for ultrasonic testing examination of welds?
• How does temperature affect ultrasonic testing results?
• In ultrasonic testing, how is the term "velocity" defined?
• In a test where the transducer is angled to the inspection surface, what equals the angle of incidence?
• What is a significant limitation of contact testing in ultrasonic applications?
• Why is surface preparation important for ultrasonic testing?
• What is the main purpose of a probe in ultrasonic testing?
• What is the term for the piezoelectric material in a search unit that produces ultrasonic waves?
• What is the effect of increasing the frequency in ultrasonic testing on wavelength?
• How can the orientation of a flaw affect ultrasonic testing results?
• What type of defects can ultrasonic testing typically detect?
• What term describes the rate at which sound waves pass through various substances in ultrasonics?
• Which factors can affect sound propagation in ultrasonic testing?
• What type of reference blocks increase in diameter by 1/64-inch increments?
• Define "coating thickness" in ultrasonic testing terms.
• Can ultrasonic testing be effectively used for thickness measurement?
• What is the function of a "gain adjustment" in ultrasonic testing?
• What is the primary reason for calibrating ultrasonic testing equipment?
• In ultrasonic testing, what happens to wave speed as the density of the medium increases?
• In ultrasonic testing, higher frequencies typically result in:
• What role does "damping" play in improving noise control during ultrasonic testing?
• What does the term “A-scan” represent in ultrasonic testing?
• How does increasing the frequency of an ultrasonic longitudinal wave affect its velocity in a plate?
• What type of discontinuity can ultrasonic testing detect?
• Which of the following test frequencies would generally provide the best penetration in a 12-inch thick specimen of coarse-grained steel?
• What is the primary benefit of using angle beam testing in ultrasonic applications?
• What technique is essential to ensure that an ultrasonic search unit is correctly aligned?
• What is the frequency range commonly used in ultrasonic testing?
• What effect does material grain structure have on ultrasonic wave propagation?
• Which of the following best describes the function of ultrasonic testing?
• Which component in an ultrasonic immersion system is responsible for adjusting and maintaining a known transducer angle?
• What should be the minimum legibility requirements for recorded ultrasonic test results?