1|Page
ET ASNT LEVEL I EXAM LATEST 2025 ACTUAL EXAM WITH
COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (100%
VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED||
In order to generate measurable eddy currents in a test specimen,
the specimen must be a(n):
a. Conductor
b. Insulator
c. Either a conductor or insulator
d. Ferromagnetic material - ANSWER-Conductor
All ferromagnetic materials that have been magnetically saturated
to suppress permeability variations may retain a certain amount of
the magnetization called the
a. Coercive force
b. Residual magnetism
c. Hysteresis loop
d. Hysteresis loss - ANSWER-Residual magnetism
An AC current flowing in a conductor will set up a(n):
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a. Alternating current field around the conductor
b. Periodically changing voltage tangent to the conductor
c. Alternating magnetic field around the conductor
d. None of the above - ANSWER-Alternating magnetic field
around the conductor
The characteristics of the alternating magnetic field in the vicinity
of the AC coil are affected by the:
a. Coil parameters
b. Magnitude of the applied AC current
c. Frequency of the applied AC current
d. All of the above - ANSWER-All of the above
When using an encircling coil with both primary and secondary
windings, the excitation alternating current is applied to the:
a. Secondary winding
b. Primary winding
c. Either the primary or secondary winding depending on the
setting of an instrument control
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d. Both the primary and secondary coils - ANSWER-Primary
winding
Which of the following is not a read-out system used to present
eddy current test information?
a. Calibrated and uncalibrated meters
b. Litmus paper
c. Cathode ray tube
d. Strip chart recorders - ANSWER-Litmus paper
Which of the following statements best describes the selection of
eddy current test frequency?
(Answer with A, B, C, or D)
a. The frequency must equal the f/f ratio to give an accurate test
b. The frequency must be within ±3% of the f/f, ratio to give an
accurate level
c. There is a range of suitable frequencies centered around the
optimum frequency
d. The frequency should be within ±25% of the characteristic
frequency - ANSWER-C
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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. Increase the amplification of the test instrument
c. Improve the fill factor
d. Add filter circuits to the instrument - ANSWER-Increase the
amplification of the test instrument
When conducting an eddy current test on tubing, the magnitude of
the indication caused by a discontinuity is dependent on the:
a. Depth of the discontinuity
b. Width of the discontinuity
c. Length of the discontinuity
d. All of the above - ANSWER-All of the above
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:
ET ASNT LEVEL I EXAM LATEST 2025 ACTUAL EXAM WITH
COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (100%
VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED||
In order to generate measurable eddy currents in a test specimen,
the specimen must be a(n):
a. Conductor
b. Insulator
c. Either a conductor or insulator
d. Ferromagnetic material - ANSWER-Conductor
All ferromagnetic materials that have been magnetically saturated
to suppress permeability variations may retain a certain amount of
the magnetization called the
a. Coercive force
b. Residual magnetism
c. Hysteresis loop
d. Hysteresis loss - ANSWER-Residual magnetism
An AC current flowing in a conductor will set up a(n):
,2|Page
a. Alternating current field around the conductor
b. Periodically changing voltage tangent to the conductor
c. Alternating magnetic field around the conductor
d. None of the above - ANSWER-Alternating magnetic field
around the conductor
The characteristics of the alternating magnetic field in the vicinity
of the AC coil are affected by the:
a. Coil parameters
b. Magnitude of the applied AC current
c. Frequency of the applied AC current
d. All of the above - ANSWER-All of the above
When using an encircling coil with both primary and secondary
windings, the excitation alternating current is applied to the:
a. Secondary winding
b. Primary winding
c. Either the primary or secondary winding depending on the
setting of an instrument control
,3|Page
d. Both the primary and secondary coils - ANSWER-Primary
winding
Which of the following is not a read-out system used to present
eddy current test information?
a. Calibrated and uncalibrated meters
b. Litmus paper
c. Cathode ray tube
d. Strip chart recorders - ANSWER-Litmus paper
Which of the following statements best describes the selection of
eddy current test frequency?
(Answer with A, B, C, or D)
a. The frequency must equal the f/f ratio to give an accurate test
b. The frequency must be within ±3% of the f/f, ratio to give an
accurate level
c. There is a range of suitable frequencies centered around the
optimum frequency
d. The frequency should be within ±25% of the characteristic
frequency - ANSWER-C
, 4|Page
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. Increase the amplification of the test instrument
c. Improve the fill factor
d. Add filter circuits to the instrument - ANSWER-Increase the
amplification of the test instrument
When conducting an eddy current test on tubing, the magnitude of
the indication caused by a discontinuity is dependent on the:
a. Depth of the discontinuity
b. Width of the discontinuity
c. Length of the discontinuity
d. All of the above - ANSWER-All of the above
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:
