Annex A (NDE Examination Methods) Flashcards

1
Q

TRUE or FALSE:

In some instances, UT examination is required to determine thickness.

A

FALSE

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2
Q

A UT thickness scan using the __-Scan display, with a digital readout is recommended

A

A

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3
Q

When performing UT corrosion mapping, ASME recommends a ____% minimum overlap of readings

A

10%

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4
Q

Phased Array UT can now be used for ___________ mapping, and provides ultra high point data density.

A

thickness

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5
Q

_______ diameter transducers will not find small diameter deep corrosion pits.

A

Large

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6
Q

Epoxy coatings have a wave velocity that is approx. ______% less than steel.

A

50

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7
Q

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

A

015

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8
Q

To prevent coating thickness error during UT doinking, selection of a _______-crystal transducer using the so-called ______-to-______ mode

A

single echo echo

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9
Q

The single-crystal transducer has poor _________ for small diameter deep pits

A

resolution

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10
Q

_______-element transducers may have the ability to measure thin sections from 0._____” to 1.000”.

A

dual 050

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11
Q

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.

A

low

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12
Q

Multi-echo technique can produce direct readings through coatings which are in the thickness range of 0._ _ ” to 0. _ _” without loss of accuracy

A

080

100

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13
Q

________ beam UT is effective in distinguishing between lamination and inclusions in metal.

A

angle

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14
Q

The most common application of angle beam transducers is to detect defects in _______-________ joints in lieu of radiography.

A

butt

welded

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15
Q

Other than MFL and UT techniques, what other NDE method is common for floor scanning of tanks? (_______ ________)

A

eddy current

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16
Q

Typically, MFL floor scans can cover _____% of the surface area, which can increase with complimentary techniques.

A

80

17
Q

Typically, what NDE method is used to quantify detected flaws, and for additional prove-up work?

A

UT

18
Q

Robotic thickness equipment can be used while submersed in tank liquid, even while the tank is in-_______.

A

service