Question

What is typically the frequency used in ultrasonic inspection?

(a) 0.1 MHz to 15 MHz

(b) 0.5 MHz to 13 MHz

(c) 1 MHz to 17 MHz

(d) 1.8 MHz to 19 MHz

I had been asked this question at a job interview.

Asked question is from Ultrasonic Inspection topic in division Non Destructive Techniques of Casting-Forming-Welding II

Answer 1

Right answer is (a) 0.1 MHz to 15 MHz

The explanation: Ultrasonic testing is one of the most commonly used method for testing of materials. The general frequency of ultrasonic testing is in the range of 0.1 MHz to 15 MHz.