Table of Contents
- 1 When referring to ultrasonic testing the term used to define the rate at which sound waves will pass through various substances is referred to as?
- 2 When testing a plate increasing the frequency of an ultrasonic longitudinal wave will result in?
- 3 How is ultrasonic test performed?
- 4 What is frequency in ultrasonic testing?
- 5 What are the ultrasonic waves?
- 6 What is ultrasonic method?
- 7 What do you need to know about the ultrasonic test?
- 8 What is the product of acoustic velocity and density?
When referring to ultrasonic testing the term used to define the rate at which sound waves will pass through various substances is referred to as?
When referring to ultrasonic testing, the term used to define the rate at which sound waves will pass through various substances is referred to as: velocity.
When testing a plate increasing the frequency of an ultrasonic longitudinal wave will result in?
36 Cards in this Set
| What can cause irrelevant indications on the cathode ray tube? | Contoured surfaces Edge Effects Surface Conditions All of the above |
|---|---|
| When testing a plate, increasing the frequency of an ultrasonic longitudinal wave will result in | no change in its velocity |
What are the different waveforms used in ultrasonic testing?
Longitudinal and shear waves are the two modes of propagation most widely used in ultrasonic testing.
Which of the following can be a source of spurious ultrasonic signals?
| Q. | Which of the following can be a source of spurious ultrasonic signals? |
|---|---|
| B. | Mode conversion within the test piece |
| C. | Shape or contour of the test piece |
| D. | All of the above |
| Answer» d. All of the above |
How is ultrasonic test performed?
Ultrasonic testing can be performed using two basic methods – pulse-echo and through-transmission. With pulse echo testing, the same transducer emits and receives the sound wave energy.
What is frequency in ultrasonic testing?
The term ultrasonic refers to sound waves of frequency above the limit of human hearing. Most ultrasonic techniques employ frequencies in the range of 1 to 10 MHz.
What is the working principle of ultrasonic test?
Driven by the pulser, the transducer generates high frequency ultrasonic energy. The sound energy is introduced and propgates through the materials in the form of waves. When there is a discontinuity (such as a crack) in the wave path, part of the energy will be reflected. back from the flaw surface.
What is ultrasonic wave frequency?
Ultrasonic wave is defined as “inaudible sound with high frequency for human” the frequency of which generally exceeds 20 kHz. These days, sound wave which is not intended to be heard is also called ultrasonic wave.
What are the ultrasonic waves?
On the basis of the mode of particle dis- placement, ultrasonic waves are classified as longitudinal waves, transverse (shear) waves, surface (Rayleigh) waves, and Lamb waves. These four types of waves are described in the following sections (Ref 1, 5).
What is ultrasonic method?
Ultrasonic methods of NDT use beams of mechanical waves (vibrations) of short wavelength and high-frequency, transmitted from a small probe and detected by the same or other probes. Such mechanical waves can travel large distances in fine-grain metal, in the form of a divergent wave with progressive attenuation.
What are ultrasonic waves transmitted into and received from?
Ultrasonic waves transmitted into and received from the test material in the form of repetitive bursts of acoustic energy is called? When performing a surface wave test, indications may result from: Surface discontinuities, Oil on the surface, dirt on the surface or all.
What do you call material used to improve ultrasonic vibrations?
A material used between the face of a transducer and the test surface to permit or improve the transmission of ultrasonic vibrations from the transfucer to the material is called Nice work!
What do you need to know about the ultrasonic test?
An ultrasonic test using a straight beam contact search unit is being conducted through the thickness of a flat part such as a plate. This test should detect: Laminar-type flaws with major dimensions parallel to the rolled surface. Sweep delay control.
What is the product of acoustic velocity and density?
All of the above. The product of the acoustic velocity of sound in a material and the density of the material is the factor that determines the amount of reflection or transmission of ultrasonic energy when it reaches an interface. This term is called: