Annex A (NDE Examination Methods) Flashcards
TRUE or FALSE:
In some instances, UT examination is required to determine thickness.
FALSE
A UT thickness scan using the __-Scan display, with a digital readout is recommended
A
When performing UT corrosion mapping, ASME recommends a ____% minimum overlap of readings
10%
Phased Array UT can now be used for ___________ mapping, and provides ultra high point data density.
thickness
_______ diameter transducers will not find small diameter deep corrosion pits.
Large
Epoxy coatings have a wave velocity that is approx. ______% less than steel.
50
An epoxy coating that is 0.030” thick, will measure at 0.___” thick by the UT device, due to the fact that epoxy wave velocity is half that of steel
015
To prevent coating thickness error during UT doinking, selection of a _______-crystal transducer using the so-called ______-to-______ mode
single echo echo
The single-crystal transducer has poor _________ for small diameter deep pits
resolution
_______-element transducers may have the ability to measure thin sections from 0._____” to 1.000”.
dual 050
Holes in the material of less than 0.050” will provide either no reading or a false reading when measured with too ______ of a frequency.
low
Multi-echo technique can produce direct readings through coatings which are in the thickness range of 0._ _ ” to 0. _ _” without loss of accuracy
080
100
________ beam UT is effective in distinguishing between lamination and inclusions in metal.
angle
The most common application of angle beam transducers is to detect defects in _______-________ joints in lieu of radiography.
butt
welded
Other than MFL and UT techniques, what other NDE method is common for floor scanning of tanks? (_______ ________)
eddy current
