Stats (1)

Question 1

Velocity of Longitudinal Waves in Steel

Answer 1

6km/s

Question 2

What is the Velocity ratio of Water compared to Steel?

Answer 2

Sounds travels 4 times faster in steel than in water

Question 3

The Smallest Detectable Defect

Answer 3

Half the size of the wavelength (λ/2)

Question 4

What Frequency can Humans detect?

Answer 4

Maximum 20KHz (20,000Hz)

Question 5

Range of Frequencies used in Ultrasonic Testing

Answer 5

0.5MHz to 25 MHz

Question 6

Ratio between Velocities of Surface and Shear Waves?

Answer 6

Surface Waves travel 3 to 15% slower than Shear Waves

Question 7

Ratio between Velocities of Shear waves and Longitudinal Waves?

Answer 7

Shear Waves travel at 1/2 the Velocity of Longitudinal Waves

Question 8

What is the intensity of a Surface Wave 1 Wavelength below the material surface?

Answer 8

4% of 1/25 of the intensity of the wave at the surface of the material

Question 9

Depth Surface waves penetrate

Answer 9

1 Wavelength below the material surface