NDT Penetrant Testing 5

Question 1

What NDT Level certification is required to interpret and evaluate PT indications per ASNT SNT-TC-1A?

Accepted Answer

Level II or Level III

Answer

Per SNT-TC-1A, Level II and Level III personnel are qualified to interpret and evaluate PT indications and accept or reject parts.

Question 2

What is the effect of excessive water pressure during the rinse step in water-washable penetrant testing?

Accepted Answer

It can wash penetrant out of shallow or wide discontinuities, causing missed indications

Answer

Excessive water pressure during rinsing can force penetrant out of open discontinuities, particularly shallow ones, leading to missed indications.

Question 3

Which discontinuity geometry retains penetrant MOST effectively, producing the strongest indication?

Accepted Answer

Tight, narrow, deep crack

Answer

Tight, narrow, deep cracks maximize capillary retention of penetrant and produce strong, well-defined indications after developer application.

Question 4

When using solvent-removable penetrant (Method C), how should excess penetrant be removed from the surface?

Accepted Answer

Wipe with a dry cloth, then solvent-dampened cloth

Answer

Solvent removal requires first wiping with a dry cloth to remove bulk penetrant, then using a lightly solvent-dampened cloth to clean remaining surface penetrant without flooding.

Question 5

A linear indication in PT is defined as one whose length is how many times greater than its width?

Accepted Answer

3:1

Answer

Per ASME Section V, an indication is considered linear when its length is at least three times its width.

NDT - Non-Destructive Testing Practice Test

NDT - Non-Destructive Testing Practice Test

NDT Penetrant Testing 5