NDT Penetrant Testing 3

Question 1

Which developer form is applied as a wet suspension in a non-aqueous carrier solvent?

Accepted Answer

Form d — non-aqueous wet developer

Answer

Form d non-aqueous wet developer uses organic solvents as a carrier and is considered the most sensitive developer form for visible dye PT.

Question 2

At what temperature range is standard liquid penetrant testing considered valid per ASTM E165?

Accepted Answer

50°F to 125°F (10°C to 52°C)

Answer

ASTM E165 specifies the standard temperature range for PT as 50°F to 125°F (10°C to 52°C) without special qualification.

Question 3

What is the primary advantage of using fluorescent penetrant over visible dye penetrant?

Accepted Answer

It provides greater sensitivity and contrast under UV light

Answer

Fluorescent penetrants produce bright yellow-green indications against a dark background under UV light, offering significantly higher sensitivity than visible dye.

Question 4

Which penetrant sensitivity level is the HIGHEST per ASTM E1135 classification?

Accepted Answer

Level 4

Answer

ASTM E1135 classifies fluorescent penetrant sensitivity from Level 1/2 (lowest) to Level 4 (ultra-high sensitivity).

Question 5

In post-emulsifiable penetrant testing, what happens if the emulsifier dwell time is excessive?

Accepted Answer

Penetrant is over-emulsified and washed out of discontinuities, causing missed indications

Answer

Over-emulsification causes the emulsifier to penetrate into discontinuities and remove trapped penetrant, resulting in loss of relevant indications.

NDT - Non-Destructive Testing Practice Test

NDT - Non-Destructive Testing Practice Test

NDT Penetrant Testing 3