Updated 2025 ET ASNT Level 1 Study Guide: Actual Exam Questions with
Verified Answers, Detailed Rationales, and 100% Accuracy – Guaranteed Pass |
Graded A+
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 - (answers).C. reference standard
In an eddy current testing situation,请您
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 - (answers).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 - (answers)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 - (answers)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 - (answers)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 请您
c. integration
d. phase shifting - (answers)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 - (answers)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 - (answers)• 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 - (answers)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%) 请您
c. 0.50 (50%)
d. 0.25 (25%) - (answers)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 - (answers)•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 - (answers)b. an alternating magnetic field
The conductivity of a material can be changed by changing the:
Verified Answers, Detailed Rationales, and 100% Accuracy – Guaranteed Pass |
Graded A+
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 - (answers).C. reference standard
In an eddy current testing situation,请您
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 - (answers).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 - (answers)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 - (answers)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 - (answers)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 请您
c. integration
d. phase shifting - (answers)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 - (answers)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 - (answers)• 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 - (answers)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%) 请您
c. 0.50 (50%)
d. 0.25 (25%) - (answers)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 - (answers)•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 - (answers)b. an alternating magnetic field
The conductivity of a material can be changed by changing the:
