ET ASNT Level II Practice Exam

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• Which of the following is a limitation of Eddy current testing?
• What is the main advantage of non-destructive testing over destructive testing?
• What can improper defect sizing potentially result in?
• The magnetic field generated by eddy currents induced in a test specimen:
• What develops the magnetic field in a material placed in an applied magnetizing force (H)?
• Which of the following is a benefit of accurate defect sizing in electromagnetic testing?
• When using which method is it possible to separate the conductivity variable from the permeability and dimensional variables?
• During eddy current testing, what signifies the presence of defects in the test specimen?
• What kind of training is necessary for personnel involved in eddy current testing?
• Which standard governs the qualification of personnel for electromagnetic testing?
• Which body is typically involved in establishing ET Level II technician qualifications?
• Which factor does NOT impact the resolution of an eddy current testing system?
• In terms of safety, why is assessing defect their size necessary?
• What is a common maintenance procedure for Eddy current equipment?
• What is the difference between a probe and a transducer in the context of ET?
• What does volumetric defect detection focus on in ET?
• In a setup where a 13 mm diameter bar is inserted into a 25 mm diameter coil, the fill factor is:
• What is a primary benefit of using phased array technology in ET?
• The induction field B within a material, when the H field strength returns to zero, is commonly referred to as?
• A method for minimizing the effect of indications caused by gradual dimensional changes is to:
• What advantage does phase-sensitive detection offer in ET?
• What happens to the eddy current flow in a conductive material as its thickness increases?
• What is the term for the portion of magnetic flux that passes outside of a ferrous material when a surface discontinuity is encountered?
• What impact does material structure have on eddy current testing results?
• How do coatings affect eddy current testing?
• What effect does increasing frequency have on the penetration depth in eddy current testing?
• What property of materials is primarily tested in Eddy Current Testing?
• What is the basis for circuits that minimize the effect of unwanted signals on the readout mechanism?
• What term is used to define the timing relationships involved in alternating current signals?
• What is the result of a condition where there is excessive working or metal movement during forging, rolling, or extruding operations?
• What occurs when a nonmagnetic rod is placed inside an eddy current test coil?
• In ET, what does the term "frequency" refer to?
• The conductivity value for a metal is influenced by which of the following factors?
• When using eddy current testing with a frequency discriminating circuit, which variable is classified as high-frequency?
• Which of the listed materials is primarily tested using Radiographic Testing?
• What principle does the concept of eddy currents rely on?
• When selecting specimens as reference standards, which condition is least important?
• When using the linear time-base method in eddy current testing, what is applied to the vertical deflection plates when conditions are balanced?
• What essential action does defect sizing facilitate in Electromagnetic Testing?
• In an unmagnetized ferromagnetic material, the magnetic domains are:
• What is the role of the test coil in ET?
• When testing small parts in an eddy current encircling coil, which test parameter is important?
• How do ferritic materials behave concerning ET?
• How can temperature affect the results of Electromagnetic Testing?
• The H field value needed to reduce the remanence of a material to zero is referred to as?
• What does an eddy current test primarily detect?
• The ratio of a material's flux density to a test coil's magnetizing force (B/H) can be used to determine the material's:
• The term fill factor is associated with which type of coil?
• What impact does increasing the test frequency typically have on the eddy current testing process?
• Which coil arrangement minimizes the effects of minor variations along the length of a wire?
• Which parameter is crucial for achieving effective eddy current testing results?
• Which testing method is best for detecting thin, shallow surface cracks?
• Why might a technician adjust the frequency during ET?
• What term defines two or more coils electrically connected in opposition during testing?
• What role does defect sizing play in ensuring safety during maintenance actions?
• What defines the phenomenon of loss of magnetism in a material due to reversed H field strength?
• Which safety measure is crucial when performing Eddy current testing?
• Eddy current testing is based on which principle?
• What kind of discontinuities can eddy current testing typically identify within conductive materials?
• What is the primary limitation of Liquid Penetrant Testing?
• In what scenario is the density of eddy currents at its maximum?
• The phenomenon where, at very high frequencies, the eddy current flow is restricted to an extremely thin outer layer of the conductor is called:
• Doubling the number of turns on a coil will have what effect on inductance?
• What term describes the technique that discriminates between variables in a test part based on phase angle changes?
• Which of the following methods is primarily used for non-destructive testing?
• What principle allows for testing with similar geometry under cylindrical or spherical symmetry?
• To decrease the effect on conductivity readings due to variations in test part thickness, one should:
• Which factor does NOT affect the sensitivity of an Eddy current test?
• Which symbol is commonly used to signify impedance?
• How does defect sizing contribute to maintenance decisions in Electromagnetic Testing?
• How does surface roughness affect the results in ET?
• In the context of eddy current testing, why is it important to achieve proper phase discrimination?
• What term defines the difference between the actual instrument output and the expected output as defined by a straight line calibration curve?
• Which term best describes the process of applying pressure and heating materials in relation to strain testing?
• What is a significant impact of material characteristics on ET testing?
• Who is accountable for the qualifications of an ET Level II technician?
• If the conductivity of a test part in an eddy current test coil decreases, the magnitude of the eddy currents at a given depth in the test specimen:
• What is a significant challenge when performing ET in the field?
• What is the primary purpose of Electromagnetic Testing (ET)?
• In an eddy current testing scenario, as coil diameter increases, what typically occurs?
• In which scenario is Acoustic Emission Testing most beneficial?
• What is one common application of Eddy current testing?
• Where will the density of eddy currents be the greatest when a rod is placed in an encircling type of coil?
• How can magnetic permeability be measured using ET?
• Which element is NOT typically evaluated during Magnetic Particle Testing?
• For age hardenable aluminum and titanium alloys, changes in hardness are indicated by changes in:
• What is the term used for a surface coil that can be rotated about the circumference of a test specimen?
• What type of data is generated from an eddy current test?
• How does material conductivity affect the results of Eddy current testing?
• What does the term "phase shift" in eddy current testing refer to?
• During the eddy current inspection process, what kind of materials can significantly hinder testing performance?
• What must limit frequency equations be used for to be considered useful?
• Which factor could lead to ineffective maintenance plans?
• What effect does a lower testing frequency have on eddy current penetration?
• If the characteristic frequency of a material is 125 Hz, what test frequency is required for an f/f ratio of 10?
• For limit frequency equations to be effective, they must be:
• In eddy current testing of nonferrous materials, the test frequency is determined by which of the following?
• What is the ultimate goal of defect sizing in the context of Electromagnetic Testing?
• What is the skin effect in the context of Eddy current testing?
• Which device can be used to suppress unwanted high-frequency harmonics?
• What is one of the primary uses of AC methods in testing?
• What happens to the direction of eddy currents in a part when the electrical current in an eddy current coil reverses direction?
• What do we call an eddy current test coil that uses magnetic material to shape the magnetic field?
• What is a significant limitation of Eddy current testing?
• Which material is most likely used as a mounting material for a probe coil?
• A property of a test system that allows the separation of signals from closely located discontinuities is known as what?
• When using the eddy current method, discontinuities are most easily detected when the eddy currents are:
• What is the primary difference between AC and DC methods in electromagnetic testing?
• What does phase angle adjustment achieve in Eddy current testing?
• In ultrasonic testing, what does the term 'couplant' refer to?
• What are the two main types of Eddy current tests?
• What aspect of defect sizing can affect the longevity of a structure?
• What unit is the inductive reactance of a coil measured in?
• In eddy current testing, how is the specimen coupled to the test coil?
• Which of the following is not a commonly used eddy current testing readout mechanism?
• A decrease in conductivity is equivalent to:
• Which of the following methods can improve the signal-to-noise ratio in an eddy current test system?
• What is the term used to describe the B value when H field strength has returned to zero?
• What should be the ratio of the specific diameter of a probe to the minimum discontinuity of interest?
• The phenomenon in which eddy currents create an opposing magnetic field is known as:
• Which environmental factor can particularly impact ET signal quality?
• What is the purpose of conducting multi-frequency Eddy current tests?
• What factor determines the frequency required for a specific eddy current testing application?
• How does the aspect ratio of a flaw influence its detectability in Eddy current testing?
• Which factor does not affect the inductance of an eddy current test coil?
• When a sinusoidal wave is applied in eddy current testing, what does it indicate?
• What is the primary purpose of a high-pass filter in eddy current testing?
• Which of the following does NOT influence the depth of penetration in Eddy current testing?
• Why is Eddy current testing conducted at various frequencies?
• In the context of Electromagnetic Testing, what role does software play?
• The selection of actual frequencies for eddy current inspection is based on:
• What is the purpose of using reference standards in ET?
• In eddy current testing, which condition may lead to inaccurate results?
• In a test coil with primary and secondary windings, what affects the voltage across the secondary?
• Why is understanding material properties important in eddy current testing?
• In a non-destructive testing context, what is the main purpose of eddy current testing?
• What is defined as any change in a sinusoidal signal when the output is not a linear reproduction of the input?
• To eliminate dependence on the number of turns in a test coil, the inductance values on an impedance diagram are:
• What impact do environmental conditions have on ET?
• What is the simplest method for measuring the thickness of nonconductive coatings on a conductive base?
• Which electrical parameters are essential for interpreting eddy current signals in ET?
• What type of force interacts in electromagnetic induction processes as observed in eddy current testing?
• What does the term "lift-off" refer to in eddy current testing?
• In modulation analysis testing, which factor would not modulate the test frequency applied to the test coil?
• Which of the following materials would have the highest resistivity value?
• Which parameter is NOT typically measured in ET?
• What type of flux is NOT included when measuring the magnetic field in ferrous materials?
• In eddy current testing using the ellipse method, what variable may be indicated by the size of the ellipse opening?
• Why is defect sizing important in Electromagnetic Testing?
• What is the goal of using electromagnetic testing techniques?
• What is a direct outcome of effective defect sizing?
• What happens to eddy currents as the frequency of the applied magnetic field increases?
• In relation to ET, what is the role of a technician during inspections?
• What term describes the effect observed from a change in electromagnetic coupling as the distance between a test specimen and a probe coil is varied?
• What is the frequency ratio defined as in electromagnetic testing?
• What is the formula used to calculate the inductive reactance of a test coil?
• Which type of coils are generally used for tubing inspection?
• What information does the phase angle provide in defect characterization?
• The heating effect in magnetic materials caused by rotating magnetic domains can be eliminated by what method?
• Which process improves measurement accuracy in ET?
• Variations in the test material during an eddy current test can be detected as variations in what?
• Which term describes the ability of a material to create an opposing magnetic field in response to an external magnetic field?
• When testing magnetic materials in a magnetic field, increasing the field strength will result in:
• What is a characteristic of an eddy current testing probe?
• What is a major problem with the eddy current test method?
• What term describes a surface or internal rupture caused by processing at too low a temperature?
• Why are relatively low frequencies used in inspecting ferromagnetic materials?
• The flux density in a magnetic material is usually designated by the:
• What is essential for ensuring compliance with standards in ET?
• What is the normal indication when using the ellipse method in eddy current testing and the test specimen matches the reference standard?
• Which method is characterized by being a subdivision of the phase analysis method of testing?
• The penetration of eddy currents in a conductive material is decreased when:
• How can variations in amplitude signals be interpreted?
• In a bridge circuit, why are two test coils often employed?
• What principle underlies the operation of an Eddy current instrument?
• What does higher test sensitivity in eddy current testing indicate?
• Which measurement is crucial for assessing the effectiveness of an eddy current testing setup?
• What types of defects can eddy current testing commonly detect?
• If the test frequency increases while the field strength remains constant, what happens to the surface eddy current density?
• What effect does the use of magnetic shielding around the exciting coil generally have?
• A system that indicates only the magnitude of variations in total coil impedance is called:
• What factor does NOT affect defect detection in ET?
• The impedance diagram principle states that to test all frequencies, what must lie at the same point on the diagram?
• When the voltage applied to a circuit and the current through the circuit both reach their maximums and minimums at the same time, the voltage and current are:
• Why is report writing an essential aspect of ET?
• As the fill factor decreases, how does the impedance variation of a pickup coil change with a given conductivity change?
• Which type of coil primarily relates to the fill factor term?
• An out-of-phase condition between current and voltage in an eddy current coil can exist in which of the following?
• How does the accuracy of defect sizing affect the structure's integrity?
• Which flaw is easiest to detect in tubing using the eddy current method with a self-comparison differential coil arrangement?
• What is the significance of a calibration standard in ET?
• What is one advantage of using digital data acquisition in ET?
• When testing tubing with an encircling coil, the phase relationship of output signals from ID and OD discontinuities is what?
• Which type of flaw can be detected by both Ultrasonic Testing and Radiographic Testing?
• What happens to an eddy current test coil's magnetic field intensity as the distance outside the coil increases?
• Which term refers to a material that has a permeability less than that of a vacuum?
• Why is it crucial to assess defect severity in Electromagnetic Testing?
• In ET, how are defects quantified?
• How does lift-off correction benefit Eddy current testing results?
• The impedance of a test coil usually can be represented by the vector sum of:
• The change in impedance of an eddy current test coil due to variations in test part characteristics is usually analyzed as a change in:
• The magnetizing force of an eddy current test coil is usually designated by which letter?
• What does the term "crossover" indicate in Eddy current testing?
• Which factor does NOT affect a metal's conductivity value?
• What corrective action does an automatic marking system enable in eddy current testing?
• The regions in a metal showing magnetic characteristics are called:
• An eddy current system that includes automatic marking of defective areas primarily allows you to:
• In eddy current testing using the linear time-base method, what is applied when there is an unbalance condition between the test specimen and reference standard?
• What impact does defect sizing have on regulatory compliance?
• Why is calibration important in Electromagnetic Testing?
• What does a shift in impedance during an ET inspection indicate?
• What role does grain size play in eddy current testing results?
• How does test frequency affect the depth of penetration for eddy currents?
• How does defect sizing influence overall operational reliability?
• What is crucial for determining the resonant frequency during eddy current testing?
• When a coil's magnetizing force is applied to a ferromagnetic material, the flux density in the material is:
• When performing dye penetrant testing, what is the purpose of the emulsifier?
• The skin depth in a conductive material is primarily affected by what factor?
• Which three major specimen parameters influence eddy current testing?