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PT II > PT II Lesson 7 > Flashcards

PT II Lesson 7 Flashcards

Deck objective is to learn, obviously bruh

1
Q

Reference blocks contain…

A

Known defects

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2
Q

Reference blocks can be made up of…

A

Aluminum
Steel
Nickel
Glass
Ceramic

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3
Q

Reference blocks checks for and can be used for…

A

Penetrant sensitivity
Comparison tests
Penetrant or emulsifier washability

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4
Q

System monitor panels are used to…

A

Detect major changes both in visible and fluorescent systems, and in water washable and post emulsifiable systems

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5
Q

Aluminum reference blocks are created by…

A

heating and water quenched to produce thermal cracks

Used for comparing the performance of penetrants in field conditions

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6
Q

How are aluminum reference blocks prepared for use?

A

They are scrubbed with a bristle brush and liquid solvent, followed by degreasing and drying

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7
Q

After use, how are aluminum reference blocks prepared for reuse?

A

It is cleaned. The block is heated to 800 degrees Fahrenheit and then quenched in cold water. It is then reheated to 160 degrees F to drive off moisture, and then cooled to room temp

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8
Q

What are you looking for in a cermanic reference plate?

A

The number or distribution of porosity indications

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9
Q

Describe what ceramic block usage looks like

A

A small drop of each penetrant is applied to surface. Penetrants are blotted with soft tissue. after dwell time, developer is applied.

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10
Q

Ceramic block cleaning

A

soaked in alcohol for several hours. Once cleaned it is then placed into a container with fresh alcohol, preferably Jamesons.

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11
Q

Anodized and plated test panels purpose

A

Stressed and cracked anodized aluminum and chrome plated nickel panels are used to compare sensitivity and washability

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12
Q

Anodized and plated test panels preparation includes…

A

scrubbed and rinsed with emulsifier or soap and then rinsed with water.

It is then dried

The panel is then dipped in acetone for a minute, then dried

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13
Q

Twin nickel-chromium sensitivity panels

A

Allows for matching crack patterns of two matching crack panels that can compare two different penetrents

have crack depths of 10, 20, 30, and 50 um

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14
Q

What are stainless steel plates used for?

A

Used for testing the washability of fluorescent and visible penetrants

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15
Q

How are cracks created in low cycle fatigue blocks (LCFb)?

A

Cracks are started from EDM (electrical discharge machined) notches or spot welds

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16
Q

What type of material is commonly used for low cycle fatigue blocks?

A

Titanium or nickel-chromium-iron

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17
Q

How are Low cycle blocks discontinuities recorded?

A

The number of indications are counted

If fewer cracks are counted, then something is wrong with the process capability, or the block was improperly cleaned

18
Q

LCF blocks are stored in…

A

Acetone

19
Q

The in-service quality of the material used in PT is determined by…

A

Check of:
Sensitivity
Water content
Washability
Contamination

20
Q

What is the purpose sensitivity comparison test?

A

To compare used or questionable penetrant to a control penetrant

21
Q

How is the sensitivity test performed?

A

The used penetrant is applied to one half while the control is applied to the other side. Indications are then visually compared. If there are noticeable differences or contamination the penetrant is discarded.

22
Q

Water washability test purpose?

A

Shows how the penetrant is removed compared to a control. If there is too much retention, then the penetrant is to be discarded.

23
Q

Water content of a penetrant is best determined by the test described by which standard?

A

ASTM D95-13e1

24
Q

What does the water content test look for?

A

Gelling, separating, clouding, coagulating, or floating of water, and water percentage.

If any of these conditions exist or the water content exceeds a percentage determined by specifications, then the penetrant is rejected.

25
Q

What are the threshold percentages for differences detected in fluorescent luminance testing?

A

differences of:
25% are obvious
12% are noticeable
6% are detectable by the eye

26
Q

What is a Fluorometer?

A

It measures penetrant brightness

Required by most specifications to do a luminance test. It’s specified by AMS 2644, ASTM 1417, and ISO 3452-2

27
Q

Emulsifier tests are used to test for…

A

Sensitivity
washability
water content
contamination levels

Tests are similar to that of penetrants.

28
Q

Under what percentage should a fluorescent penetrant be discarded when doing a fluorescence luminance test?

A

90%

29
Q

Developer is checked for…

A

cracking
contamination
concentration

30
Q

Wet developers are tested for…

A

concentration
contamination

31
Q

Solution concentration of wet developers is tested by…

A

Measuring specific gravity using a hydrometer

32
Q

What are the different liquid penetrant material tests?

A

Sensitivity
washability
water content
fluorescent luminance
contamination
fading of penetrant dyes

33
Q

Anodized and plated panel test panels have how many levels of sensitivity?

A

3: Coarse, medium, and fine

The are classified according to the size cracks they contain.

34
Q

Penetrant in open tanks are subject to…

A

contamination and/or evaporation

35
Q

Dry developers are checked for…

A

Lumps or caking

Or any sign of it coming into contact with water

36
Q

How often is dry powder checked?

A

Daily

37
Q

How is dry developer checked?

A

With a UV light by spreading a thin layer of developer in a 10 cm (4 in) circle

38
Q

When checking the fluorescent luminance of the penetrant, why should a fluorometer be used?

A

Because the human eye is not capable of detecting small changes in luminance.

39
Q

What type of discontinuities is found in ceramic reference blocks?

A

Micropits

40
Q

Visual evidence of gelling of a penetrant material stored in an open tank is typically a result of:

A

excessive water contamination.

PT II (4 decks)

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