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ASNT ULTRASONIC LEVEL I Exam 2026-2027 BANK
QUESTIONS WITH DETAILED VERIFIED ANSWERS EXAM
QUESTIONS WILL COME FROM HERE (100% Latest Already
Graded A+
1. The indication on the instrument display that represents the far
boundary of the material being tested is called:
A. The initial pulse
B. The back surface reflection
C. A discontinuity indication
D. A spurious indication
Answer: B. The back surface reflection
Explanation: In an A-scan presentation, the initial high pulse on the far
left represents the entry surface. The far boundary of the material is
represented by a return echo from the back wall, commonly referred to
as the back-wall echo or back surface reflection . This signal is used for
thickness measurements and as a reference for calibrating the
instrument's range.
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2. In immersion testing, the position of the transducer is often varied to
transmit sound into the test part at various angles to the front surface.
Such a procedure is referred to as:
A. Scanning
B. Angulation
C. Refraction
D. Attenuation
Answer: B. Angulation
Explanation: In immersion testing, the transducer is often mounted on a
manipulator that allows it to be tilted or "angulated." This allows the
sound beam to be directed into the part at various angles without
physically contacting the part, enabling the detection of flaws that are
not perpendicular to the surface .
3. The technical name for the cable that connects the ultrasonic
instrument to the transducer is:
A. Coaxial cable
B. A conduit
C. A fiber optic cable
D. A power cord
Answer: A. Coaxial cable
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Explanation: A coaxial cable is specifically designed to carry high-
frequency electrical signals with minimal interference from external
sources. The ultrasonic pulser sends a high-voltage spike to the
transducer through this cable, and the returning electrical signals from
the transducer are also carried back to the receiver via the same cable .
The construction of a coaxial cable, with its shielded center conductor, is
critical for maintaining signal integrity.
4. The process of standardizing an instrument or device by using a
reference standard is called:
A. Verification
B. Evaluation
C. Calibration
D. Certification
Answer: C. Calibration
Explanation: Calibration is the process of adjusting the response of an
instrument against a known reference standard to ensure its accuracy.
For an ultrasonic instrument, this often involves using calibration blocks
to set the range, sensitivity, and linearity of the display . This ensures
that the readings obtained during an inspection are accurate and
reliable.
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5. Another name for a compressional wave is a:
A. Shear wave
B. Surface wave
C. Longitudinal wave
D. Lamb wave
Answer: C. Longitudinal wave
Explanation: A compressional wave is one where the particle
displacement is parallel to the direction of wave propagation. This is the
fundamental definition of a longitudinal wave. In ultrasonic testing,
longitudinal waves are the most common type of wave used for
straight-beam inspections .
6. A material used between the face of a transducer and the test
surface to permit or improve the transmission of ultrasonic vibrations is
called:
A. A lubricant
B. An acoustic impedance
C. A couplant
D. A damping agent
Answer: C. Couplant
ASNT ULTRASONIC LEVEL I Exam 2026-2027 BANK
QUESTIONS WITH DETAILED VERIFIED ANSWERS EXAM
QUESTIONS WILL COME FROM HERE (100% Latest Already
Graded A+
1. The indication on the instrument display that represents the far
boundary of the material being tested is called:
A. The initial pulse
B. The back surface reflection
C. A discontinuity indication
D. A spurious indication
Answer: B. The back surface reflection
Explanation: In an A-scan presentation, the initial high pulse on the far
left represents the entry surface. The far boundary of the material is
represented by a return echo from the back wall, commonly referred to
as the back-wall echo or back surface reflection . This signal is used for
thickness measurements and as a reference for calibrating the
instrument's range.
,2|Page
2. In immersion testing, the position of the transducer is often varied to
transmit sound into the test part at various angles to the front surface.
Such a procedure is referred to as:
A. Scanning
B. Angulation
C. Refraction
D. Attenuation
Answer: B. Angulation
Explanation: In immersion testing, the transducer is often mounted on a
manipulator that allows it to be tilted or "angulated." This allows the
sound beam to be directed into the part at various angles without
physically contacting the part, enabling the detection of flaws that are
not perpendicular to the surface .
3. The technical name for the cable that connects the ultrasonic
instrument to the transducer is:
A. Coaxial cable
B. A conduit
C. A fiber optic cable
D. A power cord
Answer: A. Coaxial cable
,3|Page
Explanation: A coaxial cable is specifically designed to carry high-
frequency electrical signals with minimal interference from external
sources. The ultrasonic pulser sends a high-voltage spike to the
transducer through this cable, and the returning electrical signals from
the transducer are also carried back to the receiver via the same cable .
The construction of a coaxial cable, with its shielded center conductor, is
critical for maintaining signal integrity.
4. The process of standardizing an instrument or device by using a
reference standard is called:
A. Verification
B. Evaluation
C. Calibration
D. Certification
Answer: C. Calibration
Explanation: Calibration is the process of adjusting the response of an
instrument against a known reference standard to ensure its accuracy.
For an ultrasonic instrument, this often involves using calibration blocks
to set the range, sensitivity, and linearity of the display . This ensures
that the readings obtained during an inspection are accurate and
reliable.
, 4|Page
5. Another name for a compressional wave is a:
A. Shear wave
B. Surface wave
C. Longitudinal wave
D. Lamb wave
Answer: C. Longitudinal wave
Explanation: A compressional wave is one where the particle
displacement is parallel to the direction of wave propagation. This is the
fundamental definition of a longitudinal wave. In ultrasonic testing,
longitudinal waves are the most common type of wave used for
straight-beam inspections .
6. A material used between the face of a transducer and the test
surface to permit or improve the transmission of ultrasonic vibrations is
called:
A. A lubricant
B. An acoustic impedance
C. A couplant
D. A damping agent
Answer: C. Couplant
