ET ASNT Level I Practice Exam

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• When does an eddy current signal get produced with a product of uniform cross-section?
• Which type of metals are primarily used for their magnetic properties in applications?
• Which of the following products would be most applicable to a test using an inside coil?
• What is the primary benefit of conducting a coherency check in Eddy Current Testing?
• A spinning probe eddy current instrument is most useful for:
• What term defines one or more turns of a conductor wound to produce an axial magnetic field?
• In a feedthrough encircling coil eddy current system, what material would dc saturation be most beneficial for testing?
• What is one limitation of Eddy Current Testing?
• What factors can influence the impedance of an encircling eddy current test probe?
• What type of defects can Eddy Current Testing effectively detect?
• Can Eddy Current Testing be used on coated materials?
• Which test frequency would lead to the largest depth of penetration for eddy currents?
• When evaluating the entire circumference of a test part at one time, which coil is used?
• How does adherence to ASTM and ASNT standards impact test results?
• Narrow coil eddy current test coils are primarily used to detect what?
• Why are defects often challenging to classify in Eddy Current Testing?
• The number of lines in a unit area of a coil's magnetic field is defined as?
• What factors must be analyzed to determine if a defect is critical after detection via Eddy Current Testing?
• Which of the following is not a nondestructive testing method?
• What principle underlies the operation of Eddy Current Testing?
• A test specimen used as a basis for calibrating test equipment or as a comparison when evaluating test results is referred to as a:
• Why is the concept of "coil spacing" relevant in Eddy Current Testing?
• Material must be reasonably centered in the test coil of a flaw detection system because:
• The ratio of the response or amplitude from signals of interest to the response or amplitude of indications that contain no useful information for the test being conducted is referred to as:
• What is one purpose of conducting a lift-off correction?
• What is the effect of a discontinuity on eddy current flow?
• When testing tubing with an inside diameter coil, where do most eddy currents flow?
• What is the region around a magnet that attracts iron or steel called?
• What is the purpose of modulation analysis in eddy current testing?
• What does a "coherency check" in Eddy Current Testing involve?
• Which test method would be suitable for non-damaging evaluation of a material's properties?
• How can operator experience affect the reliability of Eddy Current Testing?
• In an eddy current test, what influences the depth of penetration?
• What type of reference standards are used for eddy current testing?
• The depth to which eddy currents are induced in ferromagnetic materials is determined by what factors?
• Which property of a conductive material affects the amplitude of induced eddy currents?
• If one winding of a double winding test coil is a primary winding, what is the other called?
• What safety precautions should be taken when performing Eddy Current Testing?
• Which statement is not applicable to eddy current testing?
• Which instrument is primarily used for conducting Eddy Current Testing?
• What is the primary purpose of the Eddy Current Testing (ET) method?
• Which environmental factors can influence Eddy Current Testing results?
• Direct current saturation coils are most likely used when testing which material?
• How is depth of penetration defined in the context of Eddy Current Testing?
• Eddy currents cannot be induced in which material?
• What is the purpose of using different probe sizes in Eddy Current Testing?
• What is a reference standard used to ensure that an eddy current system's amplitude and phase do not drift?
• Which property primarily governs the eddy currents' behavior in conductive materials?
• Which of the following statements best describes the selection of eddy current test frequency?
• Some of the products commonly tested using encircling coils are:
• Why is it important to understand the material's electrical conductivity in Eddy Current Testing?
• When analyzing Eddy Current Testing signals, what factor must be considered?
• Why is it essential to understand the material's geometry when performing Eddy Current Testing?
• The characteristics of the alternating magnetic field in the vicinity of the AC coil are affected by:
• The variation in eddy current output as the distance from the probe coil to the test part changes is called what?
• Which aspect is NOT affected by demagnetization?
• What factor can change the conductivity of a material?
• What role does validation play in the context of Eddy Current Testing?
• Why is it important to establish a baseline for comparison in Eddy Current Testing?
• Changes in the hardness of age hardenable aluminum and titanium alloys are typically accompanied by changes in what?
• What is the significance of lift-off in Eddy Current Testing?
• What role does atmospheric interference play in Eddy Current Testing?
• In eddy current testing, increasing the test frequency will typically have what effect on penetration depth?
• What happens to the signal-to-noise ratio when the saturation of ferromagnetic material is reached during eddy current testing?
• In eddy current testing, optimum sensitivity to a known defect on the surface of nonferrous tubing is obtained by:
• What property of a magnetic metal part influences the impedance of an eddy current test coil?
• What type of eddy current probe operates without direct contact with the test surface?
• Which of the following is not a primary purpose for using an eddy current standard?
• When using an encircling coil with both primary and secondary windings, the excitation alternating current is applied to:
• What is required to effectively assess the criticality of a defect post-detection?
• When sorting alloys with a comparator, what is the primary reason for keeping indications within the readout device's bounds?
• Eddy current test techniques can be used to measure which of the following?
• What happens to the eddy current amplitude when a defect is present?
• How does proper training influence the results of Eddy Current Testing?
• How do surface conditions affect Eddy Current Testing results?
• When eddy current testing a nonferrous specimen, a discontinuity will:
• Why is understanding magnetic permeability crucial in Eddy Current Testing?
• The single absolute coil arrangement can be used in which configurations?
• Demagnetization is generally needed when the residual field in a specimen:
• How can temperature variations affect Eddy Current Testing?
• What does sensitivity settings on eddy current instruments primarily adjust?
• All ferromagnetic materials that have been magnetically saturated may retain a certain amount of magnetization called the:
• Which aspect is not typically included in a coherency check?
• In order to generate measurable eddy currents, the test specimen must be:
• What is the readout mechanism typically used when testing by the ellipse method?
• How does frequency selection impact defect detection in Eddy Current Testing?
• What is a significant benefit of using an automatic Eddy Current Testing system?
• In what scenario could Eddy Current Testing become ineffective?
• What role does the frequency of the AC signal play in Eddy Current Testing?
• Which of the following materials can be tested using Eddy Current Testing?
• When you determine that a flaw detection instrument has been set up incorrectly, or is defective, what should be done with all material?
• In the context of Eddy Current Testing, what does "sensitivity" refer to?
• What is an advantage of the differential technique in Eddy Current Testing?
• What role does multi-frequency testing play in detecting defects?
• Metals that do not react or react only slightly to magnetic fields are called:
• How does multi-frequency testing improve Eddy Current Testing capabilities?
• What causes phase shift in an eddy current test coil?
• Why is thorough surface preparation important in Eddy Current Testing?
• Which of the following characteristics do not apply to magnetic materials?
• In Eddy Current Testing, what does an increased signal strength generally indicate?
• Which aspect of conductivity changes can be detected by narrow coils in eddy current testing?
• In a feedthrough encircling coil eddy current system, what is the purpose of a calibration standard?
• Which of the following cannot be tested by the eddy current testing method?
• What are calibration blocks used for in Eddy Current Testing?
• Spinning probe-type eddy current instruments are most useful in the detection of:
• What is primarily affected when using spinning probe eddy current instruments?
• The process of comparing the reading or output of an instrument, device, or dial with a standard to determine the instrument's accuracy, capacity, or graduations is referred to as:
• Eddy currents are circulating currents induced in a conducting material by a:
• An eddy current is induced in a conducting article by which of the following?
• Nondestructive tests are primarily conducted to achieve which of the following?
• In a feed-through encircling coil flaw detection system, why would you run a calibration defect several times in different positions?
• What is a common application of Eddy Current Testing?
• What type of test coil arrangement is best for detecting large surface defects?
• The impedance of an eddy current test coil will increase if the:
• How can the mechanical properties of a material affect Eddy Current Testing?
• What could compromise the soundness of defect analysis in Eddy Current Testing?
• What is the primary purpose of testing with an encircling coil in eddy current testing?
• A length of tubing containing a notch running from end to end, when tested with an encircling self-reference differential coil system, will produce:
• In Eddy Current Testing, what defines the expected patterns during a coherency check?
• What does an "impedance plane" diagram represent in Eddy Current Testing?
• An increase in the impedance of an eddy current test coil will result in what effect on current flow?
• Which defect is least likely to be detected by Eddy Current Testing?
• What is the primary purpose of the secondary winding in an eddy current coil?
• In Eddy Current Testing, what does a change in amplitude indicate?
• How does increasing the frequency of the alternating current in Eddy Current Testing affect the results?
• What do you call holes, grooves, or notches introduced into a reference standard for quality levels?
• Which of the following discontinuities is easiest to detect with an eddy current test?
• Why might lower frequencies be selected in Eddy Current Testing?
• To accurately determine the exact point location of a discontinuity, the test system should include:
• What successive step follows after determining a defect is present in Eddy Current Testing?
• The method used to generate eddy currents in a test specimen by means of a coil can most closely be compared with the action of a:
• What is a likely outcome of poor compliance with ASTM and ASNT standards?
• What is one advantage of using Eddy Current Testing over other non-destructive testing methods?
• An eddy current coil arrangement that does not compare two sections of a specimen is called?
• What aspect of nonmagnetic materials is crucial for eddy current testing effectiveness?
• Why is understanding ASTM and ASNT standards vital for Eddy Current Testing?
• What does a "differential approach" refer to in Eddy Current Testing?
• What is the role of the reference standard in Eddy Current Testing?
• What would be the primary purpose of a wide coil in eddy current testing?
• Which frequency provides the greatest eddy current penetration in aluminum?
• In systems using encircling coils, coupling efficiency is referred to as what?
• At any given instant, a spinning probe eddy current instrument should be inspecting:
• An AC current flowing in a conductor will set up:
• How are defects characterized further after detection through Eddy Current Testing?
• The symbol commonly used to express conductivity is:
• What does the term "phase angle" represent in Eddy Current Testing?
• How can operator experience affect the outcomes of Eddy Current Testing?
• The coercive force of a soft iron electromagnetic core would be the ___________ coercive force of a permanent magnet.
• Which of the following would normally be considered the best fill factor when testing straight tubing with an encircling or feedthrough coil?
• When conducting an eddy current test using a differential comparison coil arrangement that compares an external reference standard with the test specimen, the system should be nulled or balanced:
• The magnitude of the indication caused by a discontinuity during an eddy current test on tubing depends on which of the following?
• How does electrical conductivity affect Eddy Current Testing?
• Which of the following is not a read-out system used to present eddy current test information?
• Which of the following is not an eddy current testing method?
• Which of the following terms refers to a method of testing that alters the state of the material being tested?
• The generation of eddy currents is primarily related to which principle?
• What type of calibration is necessary for Eddy Current Testing equipment?
• Which of the following is not a basic component of eddy current equipment?
• Which unit defines flux density?
• What is a "lift-off correction" in Eddy Current Testing?
• Which of the following are common applications for eddy current testing?
• A symbol commonly used to express permeability is:
• Eddy currents always travel in which manner?
• In a standard Eddy Current Testing setup, what is the role of the oscilloscope?
• What is the main purpose of spring-loaded eddy current probe coils?
• What is the primary function of an eddy current drive circuit?
• How can digital signal processing enhance Eddy Current Testing?
• What results from the motion of the test specimen through a magnetic field in eddy current testing?
• What term describes a condition of balance in a device or system that results in zero output?
• An eddy current system (60-cycle comparator type) will measure variations caused by differences in:
• A term used to define testing that requires that the test article be loaded and/or sectioned to verify and/or establish mechanical or physical properties is:
• What effect do cracks oriented parallel to the eddy current flow have on testing?
• What is the primary purpose of eddy current testing?
• Which factor is essential for generating eddy currents in a conducting specimen?
• What are "probe coil designs" in the context of Eddy Current Testing?
• What is the main effect of performing multi-frequency inspections in Eddy Current Testing?
• In a feedthrough encircling coil eddy current system, the test frequency is controlled by the:
• IACS is a recognized abbreviation for:
• In eddy current testing, what is the term for the effect of the material's magnetic domain response to an external magnetic field?
• When eddy current testing a rod for discontinuities, which of the following conditions could produce extraneous indications?
• How often should Eddy Current Testing equipment be calibrated?
• One principal advantage of spinning probe eddy current instruments is:
• Which eddy current test coil arrangement uses one area of the test specimen as a reference standard?
• Lift-off in eddy current testing is utilized for measuring what?
• It is possible to sort various nonmagnetic alloys of a metal by eddy current testing when:
• What is the term for an eddy current test coil's opposition to alternating current flow?
• In an eddy current testing situation, which of the following can provide sources of noise?
• One method of reducing nonrelevant indications when eddy current testing ferromagnetic materials is to:
• Alloy variations in a nonmagnetic material would most likely affect:
• Wide coil eddy current test coils are typically used to detect which condition?
• How does surface condition affect Eddy Current Testing?
• Which statement is not applicable to spinning probe-type instruments?
• What role does surface condition play in Eddy Current Testing?
• What is not a method that may be used to improve the signal-to-noise ratio?
• What condition would be the most difficult to detect with an encircling coil when testing a rod?