Take A Free ASNT NDT ET Level 1 Exam Practice Test – Quiz Course

Here you can take a free ASNT NDT ET Level 1 Exam Practice Test with the latest Eddy Current Testing Method Questions and Answers.

1.

Which of the following would normally be considered the best fill factor when testing straight tubing with an encircling or feedthrough coil?

 a. 0.95 (95%)

 b. 1.75 (175%)

 c. 0.50 (50%)

 d. 0.25 (25%)

2.

Some of the products commonly tested using encircling coils are:

 a. rods, tubes, and wire

 b. plate when volumetrically inspected

 c. sheets and metalized foil

 d. all of the above

3.

The impedance of an eddy current test coil will increase if the:

 a. test frequency increases

 b. inductive reactance of the coil decreases

 c. inductance of the coil decreases

 d. resistance of the coil decreases

4.

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:

 a. with only the reference standard in one coil

 b. with the reference standard in one coil and an acceptable test specimen in the other coil

 c. with the reference standard in one coil and an unacceptable test specimen in the other coil

 d. with only the test specimen in one coil

5.

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 graduation is referred to as:

 a. calibration

 b. differentiation

 c. integration

 d. phase shifting

6.

Which of the following is not a basic component of eddy current equipment?

 a. amplifier

 b. coil

 c. liquid couplant

 d. detector

7.

IACS is a recognized abbreviation for:

 a. Induced Alternating Current System

 b. Inductively Activated Comparison System

 c. Internal Applied Current System

 d. International Annealed Copper Standard

8.

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:

 a. Poisson’s ratio

 b. signal-to-noise ratio

 c. the conductivity-to-permeability ratio

 d. the reactance-to-resistance ratio

9.

In an eddy current testing situation, which of the following can provide sources of noise?

 a. instrumentation electronic circuits

 b. nonspecific variations within the test object

 c. electrical interference

 d. all of the above

10.

A test specimen used as a basis for calibrating test equipment or as a comparison when evaluating test results is referred to as a:

 a. null-balancer

 b. phase shifter

 c. reference standard

 d. high pass filter

11.

When a magnetic metal part is placed in an eddy current test coil, the impedance of the coil will be changed by which of the following properties of the part?

 a. conductivity

 b. dimensions

 c. permeability

 d. all of the above

12.

An eddy current is a circulating electrical current induced in a conducting article by:

 a. gamma rays

 b. an alternating magnetic field

 c. a piezoelectric force

 d. any of the above

13.

The conductivity of a material can be changed by changing the:

 a. alloy of the specimen

 b. heat treatment of the specimen

 c. temperature of the specimen

 d. all of the above

14.

Figure 1 is an illustration of a material:

 a. phase analysis loop

 b. sine wave

 c. hysteresis loop

 d. none of the above

15.

When testing ferromagnetic materials, the depth to which eddy currents are induced in the material will be determined by the:

 a. conductivity of the material

 b. permeability of the material

 c. geometrical shape of the material

 d. all of the above

16.

When testing a plate with a probe coil, it is noted that the eddy current output indication varies as the distance from the coil to the surface of the test part varies. The term used to describe this action is:

 a. fill factor

 b. lift-off

 c. phase differentiation

 d. edge effect

17.

The main purpose of spring-loaded eddy current probe coils is to:

 a. minimizes lift-off variations

 b. minimize wear on the probe

 c. reduces operator fatigue

 d. eliminates edge effect

18.

Lift-off is utilized in:

 a. measuring permeability changes

 b. measuring conductivity changes

 c. measuring the thickness of non-conductive coatings

 d. determining proper test frequency

19.

In eddy current test systems where encircling coils are used, the coupling efficiency is referred to as:

 a. lift-off

 b. edge effect

 c. fill factor

 d. phase differentiation

20.

When inspecting products with a uniform cross-section, an eddy current signal is produced when the leading end or trailing end of the product approaches the test coil. This phenomenon is referred to as:

 a. lift-off

 b. end effect

 c. fill factor

 d. phase discrimination

21.

Which of the following conditions would be the most difficult to detect when an eddy current testing rod with an encircling coil?

 a. a deep surface crack that has a depth of 30% of the rod diameter

 b. a small inclusion in the center of the rod

 c. a 5% change in diameter

 d. a 10% change in conductivity

22.

When testing tubing with an inside diameter coil, most of the eddy currents:

 a. flow in a longitudinal direction down the tubing

 b. flow radially in the tube

 c. flow around only the outside diameter of the tubing

 d. flow around the inside diameter of the tubing

23.

Which of the following test frequencies would produce eddy currents with the largest depth of penetration?

 a. 100 Hz

 b. 10 kHz

 c. 1 MHz

 d. 10 MHz

24.

An eddy current test coil’s opposition to the flow of alternating current is called:

 a. resistance

 b. inductive reactance

 c. impedance

 d. capacitive reactance

25.

An increase in the impedance of an eddy current test coil will:

 a. causes an increase in the current flow through the test coil

 b. causes a decrease in the current flow through the test coil

 c. does not affect the current flow in the test coil

 d. decreases the voltage applied to the coil

26.

Which of the following will affect the impedance of an encircling eddy current test probe?

 a. conductivity of a test specimen in the coil

 b. permeability of a test specimen in the coil

 c. fill factor

 d. all of the above

27.

When a test coil consists of a double winding arrangement, and one winding is referred to as a primary winding, the other winding is referred to as the:

 a. absolute winding

 b. secondary winding

 c. phase winding

 d. none of the above

28.

Eddy current test coils which are wound to form a wide coil would normally be used to detect:

 a. pitting

 b. small inclusions

 c. changes in conductivity

 d. porosity

29.

Eddy current test coils, which are wound to form a narrow coil would normally be used to detect:

 a. slow changes in dimensions

 b. gradual changes in conductivity

 c. variation in heat treatment

 d. small surface defects

30.

Direct current saturation coils would most likely be used when testing:

 a. steel

 b. aluminum

 c. copper

 d. brass

31.

The single absolute coil arrangement can be used in:

 a. encircling coils only

 b. probe coils only

 c. probe and encircling coils only

 d. probe, encircling, and inside diameter coils

32.

The primary purpose(s) of the secondary winding in an eddy current coil is to:

 a. induces eddy currents in the test specimen

 b. detects changes in the eddy current flow

 c. induces eddy currents in the test specimen and detects changes in the eddy current flow

 d. provides dc saturation

33.

Which of the following eddy current test coil arrangements uses one area of the test specimen as a reference standard against which another area on the same specimen is simultaneously compared?

 a. single absolute coil

 b. double absolute coil

 c. de saturation coil

 d. differential coil

34.

The readout mechanism used when testing by the ellipse method is:

 a. met

 b. strip-chart recorder

 c. cathode ray tube

 d. any of the above

35.

Reference standards used for eddy current testing:

 a. must contain artificial discontinuities such as notches and drilled holes

 b. must contain natural discontinuities such as cracks and inclusions

 c. must be free of measurable discontinuities

 d. may contain artificial or natural discontinuities or be free of discontinuities depending on the test system and the type of test being conducted

36.

A reference standard used to ensure that the amplitude and phase characteristics of an eddy current system do not drift during continuous testing is called a:

 a. DGS standard

 b. calibration standard

 c. reference block

 d. none of the above

37.

Which of the following could not be tested by the eddy current testing method?

 a. a 102 mm (4 in.) thick plate to be tested for small discontinuities throughout the plate

 b. tubing to be tested for surface cracks

 c. rod to be tested for laps and seams

 d. tubing to be tested for variations in outside diameter

38.

Which of the following is not applicable to eddy current testing?

 a. can be used for high-speed testing

 b. can accurately measure conductivity

 c. can be set up to provide high sensitivity to small discontinuities

 d. can penetrate up to 152 mm (6 in.) in a test part

39.

The entire circumference of a test part is evaluated at one time when using:

 a. an encircling coil

 b. a probe coil

 c. a secondary winding

 d. none of the above

40.

When attempting to determine the exact point location of a discontinuity, the test system should include:

 a. a phase shifter

 b. a probe coil

 c. an attenuator

 d. a penetrometer

41.

It is often possible to sort various nonmagnetic alloys of a metal by means of an eddy current test when:

 a. there is a unique range of permeability values for each alloy

 b. there is a unique range of conductivity values for each alloy

 c. the direction of induced eddy currents varies for each alloy

 d. the magnetic domains for each alloy are different

42.

Which of the following products would be most applicable to a test using an inside coil?

 a. sheet

 b. rod

 c. bolt hole

 d. coating thicknesses

43.

When the eddy currently testing the rod for discontinuities, which of the following conditions could produce extraneous indications?

 a. improper adjustment of the hold-down rollers used to center the rod in the coil

 b. rod: fed through the coil at varying speeds

 c. changes in dimension

 d. all of the above

44.

One method of reducing nonrelevant indications when eddy current testing ferromagnetic materials are to:

 a. decreases the pressure on the hold-down rollers

 b. uses a direct current saturation coil to magnetically saturate the test specimen

 c. readjusts the gain control

 d. increases the rate of feed through the coil

45.

Eddy currents are circulating currents induced in a conducting material by a:

 a. varying piezoelectric field

 b. standing wave front

 c. direct current

 d. varying magnetic field

46.

In order to generate measurable eddy currents in a test specimen, the specimen must be:

 a. a conductor

 b. an insulator

 c. either a conductor or insulator

 d. ferromagnetic material materials that have been.

47.

All ferromagnetic variations may retain a certain amount of the magnetically saturated to suppress permeability magnetization called the:

 a. coercive force

 b. residual magnetism

 c. hysteresis loop

 d. hysteresis loss

48.

An ac current flowing in a conductor will set up:

 a. an alternating current field around the conductor

 b. a periodically changing voltage tangent to the conductor

 c. an alternating magnetic field around the conductor

 d. none of the above

49.

The characteristics of the alternating magnetic field in the vicinity of the ac coil are affected by:

 a. the coil parameters

 b. the magnitude of the applied ac current

 c. the frequency of the applied ac current

 d. all of the above

50.

When using an encircling coil with both primary and secondary windings, the excitation alternating current is applied to:

 a. the secondary winding

 b. the primary winding

 c. either the primary or secondary winding depending on the setting of an instrument control

 d. both the primary and secondary coils

51.

Which of the following statements best describes the selection of eddy’s current test frequency?

 a. the frequency must equal the f/fc ratio to give an accurate test

 b. the frequency must be within ±3% of the f/fc ratio to give an accurate test

 c. there is a range of suitable frequencies cantered around the optimum frequency.

 d. the frequency should be within ±25% of the characteristic frequency

52.

Which of the following is not a read-out system used to present eddy’s current test information?

 a. calibrated and uncalibrated meters

 b. litmus paper

 c. cathode ray tube

 d. strip-chart recorders

53.

Which of the following is not a method that may be used to improve the signal-to-noise ratio?

 a. change to a test frequency that will decrease the noise

 b. increases the amplification of the test instrument

 c. improves the fill factor

 d. add filter circuits to the instrument

54.

When conducting an eddy current test on tubing, the magnitude of the indication caused by a discontinuity is dependent on:

 a. the depth of the discontinuity

 b. the width of the discontinuity

 c. the length of the discontinuity

 d. all of the above

55.

A coil’s magnetic field may be viewed as a distribution of lines of flux around the coil. The number of lines in a unit area is defined as:

 a. magnetic density

 b. flux density

 c. magnetic coupling

 d. hysteresis density

56.

Which of the following discontinuities would be easiest to detect with an eddy current test?

 a. a crack that lies parallel to the direction of the eddy current flow

 b. a discontinuity located in the center of a 51 mm (2 in.) thick diameter rod

 c. a radial crack that extends to the outer surface of a rod

 d. a subsurface radial crack located at a depth of 13 mm (0.5 in.) in a 51 mm (2 in.) diameter rod

57.

Eddy’s current test techniques can be used to:

 a. measure coating thickness

 b. measure cladding thickness

 c. gauge the thickness of the sheet

 d. all of the above

58.

Eddy currents cannot be induced in:

 a. aluminum

 b. latex paint

 c. steel

 d. copper

59.

Which of the following characteristics do not apply to magnetic materials?

 a. high permeability value

 b. no hysteresis loop

 c. definite saturation points on the hysteresis loop

 d. appreciable residual magnetism

60.

Which of the following is not an eddy current testing method?

 a. pulse-echo testing

 b. impedance testing

 c. phase analysis testing

 d. modulation analysis testing

61.

Eddy currents always travel:

 a. in nonconductive materials

 b. radially when testing rod with an encircling coil

 c. in closed paths

 d. in a gas

62.

For the purposes of eddy current testing, a saturation of ferromagnetic material is reached when the current is at such a value that for any further increase in current, the signal-to-noise ratio will:

 a. start to increase

 b. start to decrease

 c. show no significant change

 d. suddenly drop to zero

63.

When sorting a known mix of two alloys with a comparator having a quantitative readout device, it is desirable to hold all indications within the bounds of the readout device in order to:

 a. eliminates overloading

 b. detects the possible existence of a third alloy

 c. makes proper balancing possible

 d. phase the readings correctly

64.

A term used to define a condition of balance in a device or system which results in zero output is:

 a. high-frequency standardization

 b. integration

 c. null-balance

 d. differentiation

65.

A term used to define a unit of flux density is:

 a. a maxwell

 b. a gauss

 c. an ohm

 d. a mho

66.

Changes in the hardness of age hard enable aluminum and titanium alloys will normally be accompanied by changes in:

 a. retentivity

 b. permeability

 c. magnetostriction

 d. conductivity

67.

A term used to describe holes, grooves, notches, etc., that are introduced into a reference standard to provide accurately reproducible quality levels is:

 a. a natural discontinuity

 b. an artificial discontinuity

 c. an ellipse

 d. none of the above

68.

A term used to define one or more turns or loops of a conductor wound in such a manner as to produce an axial magnetic field when current passes through the conductor is:

 a. a coil

 b. resistor

 c. a capacitor

 d. an oscillator

69.

Non-destructive tests are commonly conducted to:

 a. determines the quality of finished products

 b. locate defective material before excessive fabrication is performed on the material

 c. monitor production techniques

 d. all of the above

70.

The region around a magnet that attracts other pieces of iron or steel is called:

 a. a maxwell

 b. the magnetic field

 c. retentivity

 d. alternating current

71.

An eddy current coil arrangement that does not make a comparison with either two sections of the test specimen or one section of the test part and a reference standard is called:

 a. an absolute coil arrangement

 b. a self-comparison differential coil arrangement

 c. an external reference differential coil arrangement

 d. none of the above

72.

Which of the following are common applications for eddy current testing?

 a. measurement of conductivity or a combination of conductivity and permeability

 b. measurement of the thickness of thin metal sections, cladding, or coating

 c. detection of surface and subsurface discontinuities

 d. all of the above

73.

Which of the following is not a primary purpose for using an eddy current standard?

 a. determines if the eddy current test system is capable of performing the test properly

 b. determines if a discontinuity is a cause for rejection

 c. determines the instrument control settings needed to pass the highest percentage of test specimens run

 d. determines if the sensitivity of a test system has drifted with time

74.

The material must be reasonably cantered in the test coil of a flaw detection system because:

 a. the coil would otherwise be out of balance

 b. parts of the material furthest away from the coil, radially, may receive a less sensitive inspection

 c. the flow of eddy currents around the product will be disturbed, resulting in improper penetration

 d. lack of proper cantering may change the phase adjustment of the instrument

75.

When you determine that a flaw detection instrument has been set up incorrectly, or is defective, all material:

 a. should be retested since the time correct set-up or proper operation was last verified

 b. accepted should be retested

 c. rejected should be retested

 d. none of the above

76.

An eddy current system (60-cycle comparator type) will measure variations caused by differences in:

 a. size or shape

 b. grade or chemistry of the material

 c. the way in which the material has been processed

 d. all of the above

77.

A length of tubing containing a notch running from end to end and having uniform width and depth, when tested with an encircling self-reference differential coil system, will produce:

 a. erratic signals

 b. a continuous, sustained signal

 c. no signal

 d. excessive signals

78.

In eddy current testing, optimum sensitivity to a known defect placed at random on the surface nonferrous length of tubing is obtained by:

 a. proper choice of frequency

 b. cantering the tubing in the coil

 c. proper adjustment of phase

 d. all of the above

79.

Spinning probe-type eddy current instruments are most useful in the detection of:

 a. surface and subsurface inclusions

 b. the smallest surface blemishes

 c. internal piping or burst

 d. all of the above

80.

One principal advantage of spinning probe eddy current instruments are:

 a. the ability to locate the circumferential position of defects

 b. relative insensitivity to vibration

 c. the variety of internal and surface defects that may be detected

 d. all of the above

81.

At any given instant, a spinning probe eddy current instrument should be inspected:

 a. one complete circumference of the product

 b. an area defined by the size of the probe coil

 c. one longitudinal line the length of the product

 d. none of the above

82.

A spinning probe eddy current instrument would be most useful in:

 a. measuring hardness of ferromagnetic steel products

 b. flaw detection in hexagonal and shaped material

 c. detecting and precisely locating surface and subsurface discontinuities

 d. inspection of copper bus bars for electrical conductivity

83.

Which of the following is not a non-destructive testing method?

 a. ultrasonic testing

 b. fatigue testing

 c. eddy current testing

 d. radiographic testing

84.

Which of the following is not applicable to spinning probe-type instruments?

 a. the size of the product to be inspected is limited by the dc saturation capability of the system

 b. the frequency may be varied to accommodate various metals and alloys

 c. they may be used on straight or coiled wire products

 d. they are useful in seam detection

85.

In a feedthrough encircling coil eddy current system, a calibration standard may be used to:

 a. ensures repeatability and reliability of the setup

 b. precisely calibrates the flaw depth

 c. reduce sensitivity to vibration

 d. measure the test frequency

86.

What causes a phase shift in an eddy current test coil?

 a. a change in the ratio of inductive reactance (XL) to resistance (R) 

 b. a change in the sensitivity setting of the instrument

 c. use of modulation analysis

 d. none of the above

87.

In a feed-through encircling coil flaw detection eddy current system, what would be the purpose of running calibration defects several times but in various positions (such as top, bottom left, and right)?

 a. to check the phase selectivity

 b. to ensure proper cantering of the material in the test coil

 c. to select the modulation analysis setting

 d. to select the proper operating speed

88.

In a feedthrough encircling coil eddy current system, de-saturation would probably be most helpful in testing:

 a. copper water tubing

 b. titanium tubing

 c. ferromagnetic steel tubing.

 d. brass rivet wire

89.

In a feedthrough encircling coil eddy current system, the test frequency is controlled by the:

 a. oscilloscope

 b. sensitivity setting

 c. oscillator

 d. modulation analysis setting

90.

Alloy variations in a nonmagnetic material would most likely affect:

 a. permeability

 b. conductivity

 c. diameter

 d. frequency

91.

Which of the following frequencies will provide the greatest eddy current penetration m aluminum?

 a. 1 kHz

 b. 10 kHz

 c. 3 kHz

 d. 300 Hz

92.

The coercive force of a soft iron electromagnetic core coercive force of a would-be permanent magnet.

 a. greater than

 b. less than

 c. twice

 d. equal to

93.

Metals that do not react or react only slightly to magnetic fields are called:

 a. diamagnetic metals

 b. paramagnetic metals

 c. nonmagnetic metals

 d. all of the above

94.

A symbol commonly used to express conductivity is:

 a. μ

 b. α

 c. XL

 d. R

95.

A symbol commonly used to express permeability is:

 a. μ

 b. α

 c. XL

 d. R

96.

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:

 a. transformer

 b. capacitor

 c. storage battery

 d. generator

97.

When eddy current testing a nonferrous specimen, a discontinuity will:

 a. increases the effective conductivity of the specimen

 b. increases the effective permeability of the specimen

 c. decreases the effective conductivity of the specimen

 d. none of the above

98.

Demagnetization is generally needed when the residual field in a specimen:

 a. may affect the operation or accuracy of instruments when the specimen is placed in service

 b. may interfere with the proper functioning of the part

 c. might cause particles to be attracted and held to the surface of moving parts

 d. any of the above reasons could make demagnetization necessary

99.

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:

 a. impedance testing

 b. phase analysis testing

 c. destructive testing

 d. non-destructive testing

100.

Flux Leakage Testing Method
In leakage testing of a ferromagnetic object, magnetized close to the saturation point using an encircling coil as a sensor, what is a primary condition which needs to be met in order to obtain a response from the flaw?

 a. using a coil with a high number of turns

 b. providing an electrical connection between the coil and the tested object

 c. moving the tested object in relation to the coil

 d. shielding the cable which connects the coil with the recorder

101.

What will be the relative flux leakage level on the surface of the 1 x 7 strand cable (Figure FL-1) caused by an outer wire break compared with that caused by an inner wire break? (Assume that the gap between the ends of the broken wire is the same in both cases.)

 a. greater

 b. smaller

 c. the same, if the diameters of both wires are the same

 d. the same, even if the diameters of both wires are different

102.

What method of magnetization can be used in flux leakage testing?

 a. permanent magnet

 b. high-frequency ac

 c. dc

 d. a, and c

103.

Flux leakage may occur at a surface defect in a ferromagnetic material:

 a. when the magnetizing force is present

 b. after the magnetizing force has been removed

 c. a and b

 d. none of the above

104.

Flux leakage inspection can normally be applied to:

 a. ferromagnetic and nonmagnetic material

 b. nonmagnetic materials only

 c. ferromagnetic materials only

 d. non-conductors only

105.

Rotational transverse magnetization in a bar or pipe testing used for the detection of:

 a. transverse defects

 b. defects that have a longitudinal component

 c. only longitudinal defects

 d. both transverse and longitudinal defects

106.

With rotational flux leakage detection systems, distinctions between similar OD and ID defects are accomplished by:

 a. observing a difference in amplitude

 b. measurement of impedance change

 c. observing the signal-to-noise ratio

 d. frequency analysis e. only by visual observation of the test piece

107.

Using Figure FL-2, what is the vertical component of the leakage flux at the middle of the defect gap of a surface defect?

 a. zero

 b. maximum

 c. equal to the horizontal component

 d. divergent

108.

In circular magnetization, the recommended magnetizing current in amperes per linear inch of section thickness is:

 a. 200 to 400

 b. 400 to 600

 c. 600 to 800

 d. 800 to 1 000

109.

Flux leakage techniques can normally examine for:

 a. surface flaws only

 b. subsurface defects only

 c. defects at any location

 d. surface and near-surface defects

110.

A relative motion between the specimen and a_________ is needed in order to pick-up leakage flux.

 a. search coil

 b. hall probe

 c. magneto probe

 d. magneto resistor

111.

For a given crack with a given magnetic field, more magnetic lines of force are deflected out of the magnetic path when the:

 a. length of the crack is parallel to the magnetic lines of force

 b. length of the crack is perpendicular to the magnetic lines of force

 c. length of the crack is diagonal to the magnetic lines of force

 d. edges of the crack are polarized

112.

The curve shown in Figure FL-3 is called a:

 a. hysteresis loop

 b. minor loop

 c. recoil curve

 d. magnetization curve

113.

A Hall effect probe measures:

 a. permeability

 b. conductivity

 c. tangential field strength

 d. field strength perpendicular to the probe surface

114.

The ratio B/H is equivalent to a material’s:

 a. field strength

 b. reluctance

 c. permittivity

 d. permeability

115.

Which discontinuity in Figure FL-4 would show the strongest indication?

 a. A

 b. B

 c. C

 d. D

116.

The optimum angle at which the magnetic field must intersect a discontinuity in a test specimen is:

 a. 90°

 b. 60°

 c. 45°

 d. 30°

117.

In the flux leakage examination of tubular products, which of the following discontinuities can be detected?

 a. longitudinally oriented

 b. transversely oriented

 c. slivers

 d. all of the above

118.

In the flux leakage testing of tubular products, the amplitude of the signal received from a discontinuity will depend upon:

 a. the depth of the discontinuity

 b. the orientation of the discontinuity

 c. the distance between the flux leakage sensor and the tube

 d. all of the above

119.

Flux leakage inspection can reveal the presence of:

 a. discontinuities

 b. voids

 c. inclusions

 d. a, b, and c.

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In this quiz course, we are covering all the topics listed below:

• Principles of Electromagnetic Testing
• Test Coil Arrangements
• Test Coil Design
• Effects of Test Objects on Test Coils
• Selection of Test Frequency
• Instrument Systems
• Eddy Current Applications
• Alternating Current Field Measurement
• Remote Field Testing
• Electromagnetic Testing Procedures, Specifications, and Standards

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