Lesson 4 UT Flashcards
When mechanical pressure is applied to piezoelectric materials, the crystalline structure:
When an electric field is applied to piezoelectric materials, the structure_____, producing dimensional charges in the material.
Piezoelectricity refers to a re4versible phenomenon where by a crystal, when vibrated:
When an electric current is applied to the piezoelectric crystal, it:
Ultrasonic pulsed vibrations propagate through the test object with a velocity that depends mainly on the _________ and ______ of test material.
The transducer is a device that converts energy from one form to:
In material with a given velocity, when frequency is increased, the wavelength will:
Most commercial ultrasonic testing is performed using frequencies between:
It has been proven that ________ distinct zones are always present within the sonic beam.
Sensitivity is related to wavelength as follows:
1
The phrase” uneven intensities of the energy wave not related to distance of travel within the material” specifically relates to the physics of the :
The length of the near field is dependent on:
The length of the near field can be computed using which formula?
The peak point exits at the:
Beam spread begins at the: