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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?

 
 
 
 

2.

Some of the products commonly tested using encircling coils are:

 
 
 
 

3.

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

 
 
 
 

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:

 
 
 
 

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:

 
 
 
 

6.

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

 
 
 
 

7.

IACS is a recognized abbreviation for:

 
 
 
 

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:

 
 
 
 

9.

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

 
 
 
 

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:

 
 
 
 

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?

 
 
 
 

12.

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

 
 
 
 

13.

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

 
 
 
 

14.

Figure 1 is an illustration of a material:

Figure-1-is-an-illustration-of-a-material-039-s.png

 
 
 
 

15.

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

 
 
 
 

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:

 
 
 
 

17.

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

 
 
 
 

18.

Lift-off is utilized in:

 
 
 
 

19.

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

 
 
 
 

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:

 
 
 
 

21.

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

 
 
 
 

22.

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

 
 
 
 

23.

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

 
 
 
 

24.

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

 
 
 
 

25.

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

 
 
 
 

26.

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

 
 
 
 

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:

 
 
 
 

28.

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

 
 
 
 

29.

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

 
 
 
 

30.

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

 
 
 
 

31.

The single absolute coil arrangement can be used in:

 
 
 
 

32.

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

 
 
 
 

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?

 
 
 
 

34.

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

 
 
 
 

35.

Reference standards used for eddy current testing:

 
 
 
 

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:

 
 
 
 

37.

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

 
 
 
 

38.

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

 
 
 
 

39.

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

 
 
 
 

40.

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

 
 
 
 

41.

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

 
 
 
 

42.

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

 
 
 
 

43.

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

 
 
 
 

44.

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

 
 
 
 

45.

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

 
 
 
 

46.

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

 
 
 
 

47.

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

 
 
 
 

48.

An ac current flowing in a conductor will set up:

 
 
 
 

49.

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

 
 
 
 

50.

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

 
 
 
 

51.

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

 
 
 
 

52.

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

 
 
 
 

53.

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

 
 
 
 

54.

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

 
 
 
 

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:

 
 
 
 

56.

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

 
 
 
 

57.

Eddy’s current test techniques can be used to:

 
 
 
 

58.

Eddy currents cannot be induced in:

 
 
 
 

59.

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

 
 
 
 

60.

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

 
 
 
 

61.

Eddy currents always travel:

 
 
 
 

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:

 
 
 
 

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:

 
 
 
 

64.

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

 
 
 
 

65.

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

 
 
 
 

66.

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

 
 
 
 

67.

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

 
 
 
 

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:

 
 
 
 

69.

Non-destructive tests are commonly conducted to:

 
 
 
 

70.

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

 
 
 
 

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:

 
 
 
 

72.

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

 
 
 
 

73.

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

 
 
 
 

74.

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

 
 
 
 

75.

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

 
 
 
 

76.

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

 
 
 
 

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:

 
 
 
 

78.

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

 
 
 
 

79.

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

 
 
 
 

80.

One principal advantage of spinning probe eddy current instruments are:

 
 
 
 

81.

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

 
 
 
 

82.

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

 
 
 
 

83.

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

 
 
 
 

84.

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

 
 
 
 

85.

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

 
 
 
 

86.

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

 
 
 
 

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)?

 
 
 
 

88.

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

 
 
 
 

89.

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

 
 
 
 

90.

Alloy variations in a nonmagnetic material would most likely affect:

 
 
 
 

91.

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

 
 
 
 

92.

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

 
 
 
 

93.

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

 
 
 
 

94.

A symbol commonly used to express conductivity is:

 
 
 
 

95.

A symbol commonly used to express permeability is:

 
 
 
 

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:

 
 
 
 

97.

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

 
 
 
 

98.

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

 
 
 
 

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:

 
 
 
 

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?

 
 
 
 

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.)
Figure-FL-1.png

 
 
 
 

102.

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

 
 
 
 

103.

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

 
 
 
 

104.

Flux leakage inspection can normally be applied to:

 
 
 
 

105.

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

 
 
 
 

106.

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

 
 
 
 

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?
Figure-FL-2.png

 
 
 
 

108.

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

 
 
 
 

109.

Flux leakage techniques can normally examine for:

 
 
 
 

110.

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

 
 
 
 

111.

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

 
 
 
 

112.

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

 
 
 
 

113.

A Hall effect probe measures:

 
 
 
 

114.

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

 
 
 
 

115.

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

 
 
 
 

116.

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

 
 
 
 

117.

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

 
 
 
 

118.

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

 
 
 
 

119.

Flux leakage inspection can reveal the presence of:

 
 
 
 

Question 1 of 119

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