CRI IQI Selection & Radiographic Sensitivity

Question 1

What does IQI stand for in radiographic testing?

Accepted Answer

Image Quality Indicator

Answer

IQI stands for Image Quality Indicator, a device placed on the test object to verify the quality and sensitivity of the radiographic technique.

Question 2

Which ASTM standard specifically covers hole-type (plaque) IQIs used in industrial radiography?

Accepted Answer

ASTM E1025

Answer

ASTM E1025 covers the design, manufacture, and material groups for hole-type (plaque) IQIs used in radiographic examination.

Question 3

On a hole-type IQI, what is the diameter of the 2T hole relative to the IQI thickness?

Accepted Answer

Equal to twice the IQI thickness

Answer

The 2T hole has a diameter equal to twice the nominal thickness of the IQI, establishing a standardized reference for sensitivity measurement.

Question 4

For single-wall radiography, hole-type IQI selection is based on which thickness measurement?

Accepted Answer

Nominal single-wall thickness being radiographed

Answer

IQI designation is selected from code tables based on the nominal single-wall thickness being radiographed, not including weld reinforcement.

Question 5

What does a radiographic sensitivity designation of '2-2T' indicate?

Accepted Answer

The 2T essential hole in the IQI designated for that thickness range is visible

Answer

The '2-2T' designation means the IQI number 2 (appropriate for the material thickness) and its 2T hole are both clearly visible on the radiograph.

(CRI) Certified Radiographic Interpreter Practice Test