ASNT
ET ASNT level 1 Test Latest Study Questions
with Correct Solutions 100% Solved (Graded
A+ 2025)
I. A test specimen used as a basis for calibrating test cquipment 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 -Correct Answer ✔.C. reference standard
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 -Correct Answer ✔.d. all of the above
3. 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 -Correct Answer ✔b. signal-to-noise ratio
4. 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 -Correct Answer ✔d. International Annealed
Copper Standard
Which of the following is not a basic component of eddy current equipment?
a. amplifier
b. coil
c. liquid couplant
d. detector -Correct Answer ✔c. liquid couplant
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:
a. calibration
b. differentiation
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,ASNT
c. integration
d. phase shifting -Correct Answer ✔a. calibration
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 -Correct Answer ✔b. with the reference
standard in one coil and an acceptable test specimen in the other coil
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 -Correct Answer ✔• a. test frequency increases
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. al of the above -Correct Answer ✔a. rods, tubes, and wire
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%) -Correct Answer ✔a. 0.95 (95%
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 -Correct Answer ✔•d. all of the above
An eddy current is a circulating electrical current induced in a conducting article by:
а. gamma rays
b. an alternating magnetic field
c. a piezoelectric force
d. any of the above -Correct Answer ✔b. an alternating magnetic field
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, ASNT
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 -Correct Answer ✔. d. all of the above
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 -Correct Answer ✔.d. all of the above
When testing 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 -Correct Answer ✔b. lift-off
The main purpose for spring-loaded eddy current probe coils is to:
a. minimize lift-off variations
b. minimize wear on the probe
c. reduce operator fatigue
d. eliminate edge effect -Correct Answer ✔a. minimize lift-off variations
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 -Correct Answer ✔.c. measuring the thickness of
non-conductive coatings
In eddy current test systems where encircling coils are used, coupling efficiency is
referred to as:
a. lift-off
b. edge effect
c. fill factor
d. phase differentiation -Correct Answer ✔c. fill factor
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
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ET ASNT level 1 Test Latest Study Questions
with Correct Solutions 100% Solved (Graded
A+ 2025)
I. A test specimen used as a basis for calibrating test cquipment 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 -Correct Answer ✔.C. reference standard
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 -Correct Answer ✔.d. all of the above
3. 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 -Correct Answer ✔b. signal-to-noise ratio
4. 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 -Correct Answer ✔d. International Annealed
Copper Standard
Which of the following is not a basic component of eddy current equipment?
a. amplifier
b. coil
c. liquid couplant
d. detector -Correct Answer ✔c. liquid couplant
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:
a. calibration
b. differentiation
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,ASNT
c. integration
d. phase shifting -Correct Answer ✔a. calibration
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 -Correct Answer ✔b. with the reference
standard in one coil and an acceptable test specimen in the other coil
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 -Correct Answer ✔• a. test frequency increases
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. al of the above -Correct Answer ✔a. rods, tubes, and wire
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%) -Correct Answer ✔a. 0.95 (95%
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 -Correct Answer ✔•d. all of the above
An eddy current is a circulating electrical current induced in a conducting article by:
а. gamma rays
b. an alternating magnetic field
c. a piezoelectric force
d. any of the above -Correct Answer ✔b. an alternating magnetic field
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, ASNT
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 -Correct Answer ✔. d. all of the above
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 -Correct Answer ✔.d. all of the above
When testing 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 -Correct Answer ✔b. lift-off
The main purpose for spring-loaded eddy current probe coils is to:
a. minimize lift-off variations
b. minimize wear on the probe
c. reduce operator fatigue
d. eliminate edge effect -Correct Answer ✔a. minimize lift-off variations
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 -Correct Answer ✔.c. measuring the thickness of
non-conductive coatings
In eddy current test systems where encircling coils are used, coupling efficiency is
referred to as:
a. lift-off
b. edge effect
c. fill factor
d. phase differentiation -Correct Answer ✔c. fill factor
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
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