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ASNT ULTRASONIC LEVEL I EXAM NEWEST
2025 ACTUAL EXAM COMPLETE 170
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
In an A-scan presentation, the horizontal baseline represents the:
elapsed time or distance
In an A-scan presentation, the amplitude of vertical indications
on the display represents the:
amount of ultrasonic sound energy returning to the transducer
Which of the following test frequencies would generally provide the best penetration in a 305mm (12 in) thick specimen of coarse grained steel?
A: 1 MHz
B: 2.25 MHz
C: 5 MHz 1 / 4
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D: 10 MHz
- MHz
In a basic ultrasonic test pattern (A-scan) for contact testing
(assuming no sweep delay is used), the initial pulse is:
the high indication on the extreme left side of the display that represents the entry surface of the inspected part
An ultrasonic test using a straight beam contact transducer is being conducted through the thickness of a flat part such as a
plate. This test should detect:
laminar-type discontinuities with major dimensions parallel to the rolled surface.
In ultrasonic testing, a liquid coupling medium between the
crystal surface and the part surface is necessary because:
an air interface between the crystal surface and the part surface would almost completely reflect the ultrasonic vibrations
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Near-surface resolution is a characteristic of an ultrasonic testing
system that defines its ability to detect:
discontinuities located just beneath the entry surface in the part being tested
During ultrasonic testing by the immersion method, it is frequently necessary to angulate the search unit when a
discontinuity is located in order to:
obtain maximum response if the discontinuity is not originally oriented perpendicular to the ultrasonic beam.
All other factors being equal, the mode of vibration that has the
greatest velocity is the:
longitudinal wave
On the area-amplitude ultrasonic standard test blocks, the flat-
bottom holes in the blocks are: 3 / 4
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different in diameter, increasing by 0.4 mm (0.016 in.) increments from the no. 1 block to the no. 8 block
We have an expert-written solution to this problem!In immersion testing, verification that the transducer is normal
to a flat entry surface is indicated by:
maximum reflection from the entry surface
A piezoelectric material can:
Convert mechanical energy to electrical energy
Sound waves of a frequency beyond the hearing range of the human ear are referred to as ultrasonic waves or vibrations, and the term embraces all vibrational waves of frequency greater
than approximately:
20, 000 Hz
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