ASNT LEVEL 3 UT ASSESSMENT STANDARD
MATERIALS 2026 EXTENDED QA COMPLETE
QUERY SET WITH RESPONSES
1. In an ultrasonic test system where signal amplitudes are displayed ,
an advantage of a frequency- independent attenuator over a
continuously variable gain control is that : Answer: *b . the signal
amplitude measured using the attenuator is independent of frequency
⩥ 2 . An amplifier in which received echo pulses must exceed a
certain threshold voltage before they can be indicated might be used
to : Answer: a . suppress amplifier noise , unimportant scatter echoes ,
or small flaw echoes that are of no consequence
⩥ 3 . The output voltage from a saturated amplifier is : Answer:
C.nonlinear with respect to the input voltage
⩥ 4 The transmitted pulse at the output of the pulser usually has a
voltage of 100 to 000V , whereas the voltages of the echoes at the
input of the amplifier are on the order of : Answer: a . 0.001-1 V
⩥ 5 . The intended purpose of the adjustable calibrated attenuator of
an ultrasonic instrument is to : Answer: b . increase the dynamic
⩥ 6 . Which of the transmission of ultrasound within a coarse -
grained following might result in increased material ? Answer: b .
perform the examination after a grain refining heat treatment
, ⩥ 7 . When material grain size is on the order of wavelength of larger
, excessive scattering of the ultrasonic beam may affect test results .
Answer: c . 1/10
⩥ 8 . In a forging , flaws associated with nonmetallic inclusions can
most accurately be described as being : Answer: c . aligned with
forging flow lines
⩥ 9 The preferred method of ultrasonically inspecting a complex -
shaped forging : Answer: b . combines thorough inspection of the
billet prior to b forgingpart in all areas where the shape permits
forging with a careful inspection of the finished
⩥ 10. In a long rod that is examined from one end with a longitudinal
beam the most likely effect of longitudinally oriented discontinuities
would be to : Answer: c . remove or reduce the amplitude of echoes
from refracted beam paths
⩥ 11. When maximum sensitivity is required from a transducer
Answer: c . the piezoelectric element should be driven at its
fundamental resonant frequency
⩥ 12. The 1 MHz transducer that should normally have the best time
or distance resolution is a : Answer: d . lithium sulfate transducer with
epoxy backing
MATERIALS 2026 EXTENDED QA COMPLETE
QUERY SET WITH RESPONSES
1. In an ultrasonic test system where signal amplitudes are displayed ,
an advantage of a frequency- independent attenuator over a
continuously variable gain control is that : Answer: *b . the signal
amplitude measured using the attenuator is independent of frequency
⩥ 2 . An amplifier in which received echo pulses must exceed a
certain threshold voltage before they can be indicated might be used
to : Answer: a . suppress amplifier noise , unimportant scatter echoes ,
or small flaw echoes that are of no consequence
⩥ 3 . The output voltage from a saturated amplifier is : Answer:
C.nonlinear with respect to the input voltage
⩥ 4 The transmitted pulse at the output of the pulser usually has a
voltage of 100 to 000V , whereas the voltages of the echoes at the
input of the amplifier are on the order of : Answer: a . 0.001-1 V
⩥ 5 . The intended purpose of the adjustable calibrated attenuator of
an ultrasonic instrument is to : Answer: b . increase the dynamic
⩥ 6 . Which of the transmission of ultrasound within a coarse -
grained following might result in increased material ? Answer: b .
perform the examination after a grain refining heat treatment
, ⩥ 7 . When material grain size is on the order of wavelength of larger
, excessive scattering of the ultrasonic beam may affect test results .
Answer: c . 1/10
⩥ 8 . In a forging , flaws associated with nonmetallic inclusions can
most accurately be described as being : Answer: c . aligned with
forging flow lines
⩥ 9 The preferred method of ultrasonically inspecting a complex -
shaped forging : Answer: b . combines thorough inspection of the
billet prior to b forgingpart in all areas where the shape permits
forging with a careful inspection of the finished
⩥ 10. In a long rod that is examined from one end with a longitudinal
beam the most likely effect of longitudinally oriented discontinuities
would be to : Answer: c . remove or reduce the amplitude of echoes
from refracted beam paths
⩥ 11. When maximum sensitivity is required from a transducer
Answer: c . the piezoelectric element should be driven at its
fundamental resonant frequency
⩥ 12. The 1 MHz transducer that should normally have the best time
or distance resolution is a : Answer: d . lithium sulfate transducer with
epoxy backing
