Question

For performing TOFD testing, what is the MINIMUM number of probes required:

A) 2
B) 3
C) 4
D) 5

Answer 1

TOFD testing requires a minimum of two probes, which emit and receive ultrasonic pulses to detect and size defects in materials.

Step-by-step explanation:

TOFD testing, which stands for Time-of-Flight Diffraction testing, is a non-destructive testing method used to detect and size defects in materials, such as welds or composites. It involves the use of ultrasonic pulses.

To perform TOFD testing, a minimum of two probes are required. One of the probes emits ultrasonic pulses, and the other receives the echoes. By analyzing the time it takes for the signal to travel between the probes and the echoes received, defects can be detected and their size can be estimated.

Having only two probes is the minimum requirement for TOFD testing, but it is common to use additional probes to provide more comprehensive coverage and improve the accuracy of the test results.